Differential D557 Diff 2863 source/simulation2/components/CCmpRallyPointRenderer.cpp

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source/simulation2/components/CCmpRallyPointRenderer.cpp

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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.		* GNU General Public License for more details.
*		*
* You should have received a copy of the GNU General Public License		* You should have received a copy of the GNU General Public License
* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.		* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
*/		*/

#include "precompiled.h"		#include "precompiled.h"
#include "ICmpRallyPointRenderer.h"		#include "CCmpRallyPointRenderer.h"

#include "simulation2/MessageTypes.h"		std::string CCmpRallyPointRenderer::GetSchema()
#include "simulation2/components/ICmpFootprint.h"
#include "simulation2/components/ICmpObstructionManager.h"
#include "simulation2/components/ICmpOwnership.h"
#include "simulation2/components/ICmpPathfinder.h"
#include "simulation2/components/ICmpPlayer.h"
#include "simulation2/components/ICmpPlayerManager.h"
#include "simulation2/components/ICmpPosition.h"
#include "simulation2/components/ICmpRangeManager.h"
#include "simulation2/components/ICmpTerrain.h"
#include "simulation2/components/ICmpVisual.h"
#include "simulation2/components/ICmpWaterManager.h"
#include "simulation2/helpers/Render.h"
#include "simulation2/helpers/Geometry.h"
#include "simulation2/system/Component.h"

#include "graphics/Overlay.h"
#include "graphics/TextureManager.h"
#include "ps/CLogger.h"
#include "ps/Profile.h"
#include "renderer/Renderer.h"

struct SVisibilitySegment
{
bool m_Visible;
size_t m_StartIndex;
size_t m_EndIndex; // inclusive

SVisibilitySegment(bool visible, size_t startIndex, size_t endIndex)
: m_Visible(visible), m_StartIndex(startIndex), m_EndIndex(endIndex)
{}

bool operator==(const SVisibilitySegment& other) const
{
return (m_Visible == other.m_Visible && m_StartIndex == other.m_StartIndex && m_EndIndex == other.m_EndIndex);
}

bool operator!=(const SVisibilitySegment& other) const
{
return !(*this == other);
}

bool IsSinglePoint() const
{
return (m_StartIndex == m_EndIndex);
}
};

class CCmpRallyPointRenderer : public ICmpRallyPointRenderer
{
// import some types for less verbosity
typedef WaypointPath Path;
typedef PathGoal Goal;
typedef ICmpRangeManager::CLosQuerier CLosQuerier;
typedef SOverlayTexturedLine::LineCapType LineCapType;

public:
static void ClassInit(CComponentManager& componentManager)
{
componentManager.SubscribeToMessageType(MT_OwnershipChanged);
componentManager.SubscribeToMessageType(MT_TurnStart);
componentManager.SubscribeToMessageType(MT_Destroy);
componentManager.SubscribeToMessageType(MT_PositionChanged);
}

DEFAULT_COMPONENT_ALLOCATOR(RallyPointRenderer)

protected:

/// Display position of the rally points. Note that this are merely the display positions; they not necessarily the same as the
/// actual positions used in the simulation at any given time. In particular, we need this separate copy to support
/// instantaneously rendering the rally point markers/lines when the user sets one in-game (instead of waiting until the
/// network-synchronization code sets it on the RallyPoint component, which might take up to half a second).
std::vector<CFixedVector2D> m_RallyPoints;
/// Full path to the rally points as returned by the pathfinder, with some post-processing applied to reduce zig/zagging.
std::vector<std::vector<CVector2D> > m_Path;
/// Visibility segments of the rally point paths; splits the path into SoD/non-SoD segments.
std::deque<std::deque<SVisibilitySegment> > m_VisibilitySegments;

bool m_Displayed; ///< Should we render the rally points and the path lines? (set from JS when e.g. the unit is selected/deselected)
bool m_SmoothPath; ///< Smooth the path before rendering?

std::vector<entity_id_t> m_MarkerEntityIds; ///< Entity IDs of the rally point markers.
size_t m_LastMarkerCount;
player_id_t m_LastOwner; ///< Last seen owner of this entity (used to keep track of ownership changes).
std::wstring m_MarkerTemplate; ///< Template name of the rally point markers.

/// Marker connector line settings (loaded from XML)
float m_LineThickness;
CColor m_LineColor;
CColor m_LineDashColor;
LineCapType m_LineStartCapType;
LineCapType m_LineEndCapType;
std::wstring m_LineTexturePath;
std::wstring m_LineTextureMaskPath;
std::string m_LinePassabilityClass; ///< Pathfinder passability class to use for computing the (long-range) marker line path.

CTexturePtr m_Texture;
CTexturePtr m_TextureMask;

/// Textured overlay lines to be used for rendering the marker line. There can be multiple because we may need to render
/// dashes for segments that are inside the SoD.
std::vector<std::vector<SOverlayTexturedLine> > m_TexturedOverlayLines;

/// Draw little overlay circles to indicate where the exact path points are?
bool m_EnableDebugNodeOverlay;
std::vector<std::vector<SOverlayLine> > m_DebugNodeOverlays;

public:

static std::string GetSchema()
{		{
return		return
"<a:help>Displays a rally point marker where created units will gather when spawned</a:help>"		"<a:help>Displays a rally point marker where created units will gather when spawned</a:help>"
"<a:example>"		"<a:example>"
"<MarkerTemplate>special/rallypoint</MarkerTemplate>"		"<MarkerTemplate>special/rallypoint</MarkerTemplate>"
"<LineThickness>0.75</LineThickness>"		"<LineThickness>0.75</LineThickness>"
"<LineStartCap>round</LineStartCap>"		"<LineStartCap>round</LineStartCap>"
"<LineEndCap>square</LineEndCap>"		"<LineEndCap>square</LineEndCap>"
"<LineColor r='20' g='128' b='240'></LineColor>"		"<LineColor r='20' g='128' b='240'></LineColor>"
"<LineDashColor r='158' g='11' b='15'></LineDashColor>"		"<LineDashColor r='158' g='11' b='15'></LineDashColor>"
"<LinePassabilityClass>default</LinePassabilityClass>"		"<LinePassabilityClass>default</LinePassabilityClass>"
"</a:example>"		"</a:example>"
"<element name='MarkerTemplate' a:help='Template name for the rally point marker entity (typically a waypoint flag actor)'>"		"<element name='MarkerTemplate' a:help='Template name for the rally point marker entity (typically a waypoint flag actor)'>"
"<text/>"		"<text/>"
"</element>"		"</element>"
"<element name='LineTexture' a:help='Texture file to use for the rally point line'>"		"<element name='LineTexture' a:help='Texture file to use for the rally point line'>"
"<text />"		"<text />"
"</element>"		"</element>"
"<element name='LineTextureMask' a:help='Texture mask to indicate where overlay colors are to be applied (see LineColor and LineDashColor)'>"		"<element name='LineTextureMask' a:help='Texture mask to indicate where overlay colors are to be applied (see LineColor and LineDashColor)'>"
"<text />"		"<text />"
"</element>"		"</element>"
"<element name='LineThickness' a:help='Thickness of the marker line connecting the entity to the rally point marker'>"		"<element name='LineThickness' a:help='Thickness of the marker line connecting the entity to the rally point marker'>"
"<data type='decimal'/>"		"<data type='decimal'/>"
"</element>"		"</element>"
"<element name='LineColor'>"		"<element name='LineColor'>"
"<attribute name='r'>"		"<attribute name='r'>"
"<data type='integer'><param name='minInclusive'>0</param><param name='maxInclusive'>255</param></data>"		"<data type='integer'><param name='minInclusive'>0</param><param name='maxInclusive'>255</param></data>"
"</attribute>"		"</attribute>"
"<attribute name='g'>"		"<attribute name='g'>"
"<data type='integer'><param name='minInclusive'>0</param><param name='maxInclusive'>255</param></data>"		"<data type='integer'><param name='minInclusive'>0</param><param name='maxInclusive'>255</param></data>"
"</attribute>"		"</attribute>"
"<attribute name='b'>"		"<attribute name='b'>"
"<data type='integer'><param name='minInclusive'>0</param><param name='maxInclusive'>255</param></data>"		"<data type='integer'><param name='minInclusive'>0</param><param name='maxInclusive'>255</param></data>"
"</attribute>"		"</attribute>"
"</element>"		"</element>"
"<element name='LineDashColor'>"		"<element name='LineDashColor'>"
"<attribute name='r'>"		"<attribute name='r'>"
"<data type='integer'><param name='minInclusive'>0</param><param name='maxInclusive'>255</param></data>"		"<data type='integer'><param name='minInclusive'>0</param><param name='maxInclusive'>255</param></data>"
"</attribute>"		"</attribute>"
"<attribute name='g'>"		"<attribute name='g'>"
"<data type='integer'><param name='minInclusive'>0</param><param name='maxInclusive'>255</param></data>"		"<data type='integer'><param name='minInclusive'>0</param><param name='maxInclusive'>255</param></data>"
"</attribute>"		"</attribute>"
"<attribute name='b'>"		"<attribute name='b'>"
"<data type='integer'><param name='minInclusive'>0</param><param name='maxInclusive'>255</param></data>"		"<data type='integer'><param name='minInclusive'>0</param><param name='maxInclusive'>255</param></data>"
"</attribute>"		"</attribute>"
"</element>"		"</element>"
"<element name='LineStartCap'>"		"<element name='LineStartCap'>"
"<choice>"		"<choice>"
"<value a:help='Abrupt line ending; line endings are not closed'>flat</value>"		"<value a:help='Abrupt line ending; line endings are not closed'>flat</value>"
"<value a:help='Semi-circular line end cap'>round</value>"		"<value a:help='Semi-circular line end cap'>round</value>"
"<value a:help='Sharp, pointy line end cap'>sharp</value>"		"<value a:help='Sharp, pointy line end cap'>sharp</value>"
"<value a:help='Square line end cap'>square</value>"		"<value a:help='Square line end cap'>square</value>"
"</choice>"		"</choice>"
"</element>"		"</element>"
"<element name='LineEndCap'>"		"<element name='LineEndCap'>"
"<choice>"		"<choice>"
"<value a:help='Abrupt line ending; line endings are not closed'>flat</value>"		"<value a:help='Abrupt line ending; line endings are not closed'>flat</value>"
"<value a:help='Semi-circular line end cap'>round</value>"		"<value a:help='Semi-circular line end cap'>round</value>"
"<value a:help='Sharp, pointy line end cap'>sharp</value>"		"<value a:help='Sharp, pointy line end cap'>sharp</value>"
"<value a:help='Square line end cap'>square</value>"		"<value a:help='Square line end cap'>square</value>"
"</choice>"		"</choice>"
"</element>"		"</element>"
"<element name='LinePassabilityClass' a:help='The pathfinder passability class to use for computing the rally point marker line path'>"		"<element name='LinePassabilityClass' a:help='The pathfinder passability class to use for computing the rally point marker line path'>"
"<text />"		"<text />"
"</element>";		"</element>";
}		}

virtual void Init(const CParamNode& paramNode);

virtual void Deinit()
{
}

virtual void Serialize(ISerializer& UNUSED(serialize))
{
// do NOT serialize anything; this is a rendering-only component, it does not and should not affect simulation state
}

virtual void Deserialize(const CParamNode& paramNode, IDeserializer& UNUSED(deserialize))
{
Init(paramNode);
}

virtual void HandleMessage(const CMessage& msg, bool UNUSED(global))
{
switch (msg.GetType())
{
case MT_RenderSubmit:
{
PROFILE("RallyPoint::RenderSubmit");
if (m_Displayed && IsSet())
{
const CMessageRenderSubmit& msgData = static_cast<const CMessageRenderSubmit&> (msg);
RenderSubmit(msgData.collector);
}
}
break;
case MT_OwnershipChanged:
{
UpdateMarkers(); // update marker variation to new player's civilization
}
break;
case MT_TurnStart:
{
UpdateOverlayLines(); // check for changes to the SoD and update the overlay lines accordingly
}
break;
case MT_Destroy:
{
for (std::vector<entity_id_t>::iterator it = m_MarkerEntityIds.begin(); it < m_MarkerEntityIds.end(); ++it)
{
if (*it != INVALID_ENTITY)
{
GetSimContext().GetComponentManager().DestroyComponentsSoon(*it);
*it = INVALID_ENTITY;
}
}
}
break;
case MT_PositionChanged:
{
// Unlikely to happen in-game, but can occur in atlas
// Just recompute the path from the entity to the first rally point
RecomputeRallyPointPath_wrapper(0);
}
break;
}
}

/*
* Must be called whenever m_Displayed or the size of m_RallyPoints change,
* to determine whether we need to respond to render messages.
*/
void UpdateMessageSubscriptions()
{
bool needRender = m_Displayed && IsSet();
GetSimContext().GetComponentManager().DynamicSubscriptionNonsync(MT_RenderSubmit, this, needRender);
}

virtual void AddPosition_wrapper(const CFixedVector2D& pos)
{
AddPosition(pos, false);
}

virtual void SetPosition(const CFixedVector2D& pos)
{
if (!(m_RallyPoints.size() == 1 && m_RallyPoints.front() == pos))
{
m_RallyPoints.clear();
AddPosition(pos, true);
// Don't need to UpdateMessageSubscriptions here since AddPosition already calls it
}
}

virtual void UpdatePosition(u32 rallyPointId, const CFixedVector2D& pos)
{
if (rallyPointId >= m_RallyPoints.size())
return;

m_RallyPoints[rallyPointId] = pos;

UpdateMarkers();

// Compute a new path for the current, and if existing the next rally point
RecomputeRallyPointPath_wrapper(rallyPointId);
if (rallyPointId+1 < m_RallyPoints.size())
RecomputeRallyPointPath_wrapper(rallyPointId+1);
}

virtual void SetDisplayed(bool displayed)
{
if (m_Displayed != displayed)
{
m_Displayed = displayed;

// move the markers out of oblivion and back into the real world, or vice-versa
UpdateMarkers();

// Check for changes to the SoD and update the overlay lines accordingly. We need to do this here because this method
// only takes effect when the display flag is active; we need to pick up changes to the SoD that might have occurred
// while this rally point was not being displayed.
UpdateOverlayLines();

UpdateMessageSubscriptions();
}
}

virtual void Reset()
{
m_RallyPoints.clear();
RecomputeAllRallyPointPaths();
UpdateMessageSubscriptions();
}

/**
* Returns true if at least one display rally point is set; i.e., if we have a point to render our marker/line at.
*/
bool IsSet() const
{
return !m_RallyPoints.empty();
}

private:

/**
* Helper function for AddPosition_wrapper and SetPosition.
*/
void AddPosition(CFixedVector2D pos, bool recompute)
{
m_RallyPoints.push_back(pos);
UpdateMarkers();

if (recompute)
RecomputeAllRallyPointPaths();
else
RecomputeRallyPointPath_wrapper(m_RallyPoints.size()-1);

UpdateMessageSubscriptions();
}

/**
* Repositions the rally point markers; moves them outside of the world (ie. hides them), or positions them at the currently
* set rally points. Also updates the actor's variation according to the entity's current owning player's civilization.
*
* Should be called whenever either the position of a rally point changes (including whether it is set or not), or the display
* flag changes, or the ownership of the entity changes.
*/
void UpdateMarkers();

/**
* Recomputes all the full paths from this entity to the rally point and from the rally point to the next, and does all the necessary
* post-processing to make them prettier.
*
* Should be called whenever all rally points' position changes.
*/
void RecomputeAllRallyPointPaths();

/**
* Recomputes the full path for m_Path[ @p index], and does all the necessary post-processing to make it prettier.
*
* Should be called whenever either the starting position or the rally point's position changes.
*/
void RecomputeRallyPointPath_wrapper(size_t index);

/**
* Recomputes the full path from this entity/the previous rally point to the next rally point, and does all the necessary
* post-processing to make it prettier. This doesn't check if we have a valid position or if a rally point is set.
*
* You shouldn't need to call this method directly.
*/
void RecomputeRallyPointPath(size_t index, CmpPtr<ICmpPosition>& cmpPosition, CmpPtr<ICmpFootprint>& cmpFootprint, CmpPtr<ICmpPathfinder> cmpPathfinder);

/**
* Checks for changes to the SoD to the previously saved state, and reconstructs the visibility segments and overlay lines to
* match if necessary. Does nothing if the rally point lines are not currently set to be displayed, or if no rally point is set.
*/
void UpdateOverlayLines();

/**
* Sets up all overlay lines for rendering according to the current full path and visibility segments. Splits the line into solid
* and dashed pieces (for the SoD). Should be called whenever the SoD has changed. If no full path is currently set, this method
* does nothing.
*/
void ConstructAllOverlayLines();

/**
* Sets up the overlay lines for rendering according to the full path and visibility segments at @p index. Splits the line into
* solid and dashed pieces (for the SoD). Should be called whenever the SoD of the path at @p index has changed.
*/
void ConstructOverlayLines(size_t index);

/**
* Removes points from @p coords that are obstructed by the originating building's footprint, and links up the last point
* nicely to the edge of the building's footprint. Only needed if the pathfinder can possibly return obstructed tile waypoints,
* i.e. when pathfinding is started from an obstructed tile.
*/
void FixFootprintWaypoints(std::vector<CVector2D>& coords, CmpPtr<ICmpPosition> cmpPosition, CmpPtr<ICmpFootprint> cmpFootprint) const;

/**
* Get the point on the footprint edge that's as close from "start" as possible.
*/
void GetClosestsEdgePointFrom(CFixedVector2D& result, CFixedVector2D& start, CmpPtr<ICmpPosition> cmpPosition, CmpPtr<ICmpFootprint> cmpFootprint) const;

/**
* Returns a list of indices of waypoints in the current path (m_Path[index]) where the LOS visibility changes, ordered from
* building/previous rally point to rally point. Used to construct the overlay line segments and track changes to the SoD.
*/
void GetVisibilitySegments(std::deque<SVisibilitySegment>& out, size_t index) const;

/**
* Simplifies the path by removing waypoints that lie between two points that are visible from one another. This is primarily
* intended to reduce some unnecessary curviness of the path; the pathfinder returns a mathematically (near-)optimal path, which
* will happily curve and bend to reduce costs. Visually, it doesn't make sense for a rally point path to curve and bend when it
* could just as well have gone in a straight line; that's why we have this, to make it look more natural.
*
* @p coords array of path coordinates to simplify
* @p maxSegmentLinks if non-zero, indicates the maximum amount of consecutive node-to-node links that can be joined into a
* single link. If this value is set to e.g. 1, then no reductions will be performed. A value of 3 means that
* at most 3 consecutive node links will be joined into a single link.
* @p floating whether to consider nodes who are under the water level as floating on top of the water
*/
void ReduceSegmentsByVisibility(std::vector<CVector2D>& coords, unsigned maxSegmentLinks = 0, bool floating = true) const;

/**
* Helper function to GetVisibilitySegments, factored out for testing. Merges single-point segments with its neighbouring
* segments. You should not have to call this method directly.
*/
static void MergeVisibilitySegments(std::deque<SVisibilitySegment>& segments);

void RenderSubmit(SceneCollector& collector);
};

REGISTER_COMPONENT_TYPE(RallyPointRenderer)

void CCmpRallyPointRenderer::Init(const CParamNode& paramNode)		void CCmpRallyPointRenderer::Init(const CParamNode& paramNode)
{		{
m_Displayed = false;		CCmpItineraryPointRenderer::Init(paramNode);
m_SmoothPath = true;
m_LastOwner = INVALID_PLAYER;
m_LastMarkerCount = 0;
m_EnableDebugNodeOverlay = false;

// ---------------------------------------------------------------------------------------------
// load some XML configuration data (schema guarantees that all these nodes are valid)

m_MarkerTemplate = paramNode.GetChild("MarkerTemplate").ToString();

const CParamNode& lineColor = paramNode.GetChild("LineColor");
m_LineColor = CColor(
lineColor.GetChild("@r").ToInt()/255.f,
lineColor.GetChild("@g").ToInt()/255.f,
lineColor.GetChild("@b").ToInt()/255.f,
1.f
);

const CParamNode& lineDashColor = paramNode.GetChild("LineDashColor");
m_LineDashColor = CColor(
lineDashColor.GetChild("@r").ToInt()/255.f,
lineDashColor.GetChild("@g").ToInt()/255.f,
lineDashColor.GetChild("@b").ToInt()/255.f,
1.f
);

m_LineThickness = paramNode.GetChild("LineThickness").ToFixed().ToFloat();
m_LineTexturePath = paramNode.GetChild("LineTexture").ToString();
m_LineTextureMaskPath = paramNode.GetChild("LineTextureMask").ToString();
m_LineStartCapType = SOverlayTexturedLine::StrToLineCapType(paramNode.GetChild("LineStartCap").ToString());
m_LineEndCapType = SOverlayTexturedLine::StrToLineCapType(paramNode.GetChild("LineEndCap").ToString());
m_LinePassabilityClass = paramNode.GetChild("LinePassabilityClass").ToUTF8();

// ---------------------------------------------------------------------------------------------
// load some textures

if (CRenderer::IsInitialised())
{
CTextureProperties texturePropsBase(m_LineTexturePath);
texturePropsBase.SetWrap(GL_CLAMP_TO_BORDER, GL_CLAMP_TO_EDGE);
texturePropsBase.SetMaxAnisotropy(4.f);
m_Texture = g_Renderer.GetTextureManager().CreateTexture(texturePropsBase);

CTextureProperties texturePropsMask(m_LineTextureMaskPath);
texturePropsMask.SetWrap(GL_CLAMP_TO_BORDER, GL_CLAMP_TO_EDGE);
texturePropsMask.SetMaxAnisotropy(4.f);
m_TextureMask = g_Renderer.GetTextureManager().CreateTexture(texturePropsMask);
}
}

void CCmpRallyPointRenderer::UpdateMarkers()
{
player_id_t previousOwner = m_LastOwner;
for (size_t i = 0; i < m_RallyPoints.size(); ++i)
{
if (i >= m_MarkerEntityIds.size())
m_MarkerEntityIds.push_back(INVALID_ENTITY);

if (m_MarkerEntityIds[i] == INVALID_ENTITY)
{
// no marker exists yet, create one first
CComponentManager& componentMgr = GetSimContext().GetComponentManager();

// allocate a new entity for the marker
if (!m_MarkerTemplate.empty())
{
m_MarkerEntityIds[i] = componentMgr.AllocateNewLocalEntity();
if (m_MarkerEntityIds[i] != INVALID_ENTITY)
m_MarkerEntityIds[i] = componentMgr.AddEntity(m_MarkerTemplate, m_MarkerEntityIds[i]);
}
}

// the marker entity should be valid at this point, otherwise something went wrong trying to allocate it
if (m_MarkerEntityIds[i] == INVALID_ENTITY)
LOGERROR("Failed to create rally point marker entity");

CmpPtr<ICmpPosition> markerCmpPosition(GetSimContext(), m_MarkerEntityIds[i]);
if (markerCmpPosition)
{
if (m_Displayed && IsSet())
{
markerCmpPosition->MoveTo(m_RallyPoints[i].X, m_RallyPoints[i].Y);
}		}
else		void CCmpRallyPointRenderer::Deinit()
{		{
markerCmpPosition->MoveOutOfWorld(); // hide it		CCmpItineraryPointRenderer::Deinit();
}
}

// set rally point flag selection based on player civilization
CmpPtr<ICmpOwnership> cmpOwnership(GetEntityHandle());
if (!cmpOwnership)
continue;

player_id_t ownerId = cmpOwnership->GetOwner();
if (ownerId == INVALID_PLAYER \|\| (ownerId == previousOwner && m_LastMarkerCount >= i))
continue;

m_LastOwner = ownerId;
CmpPtr<ICmpPlayerManager> cmpPlayerManager(GetSystemEntity());
// cmpPlayerManager should not be null as long as this method is called on-demand instead of at Init() time
// (we can't rely on component initialization order in Init())
if (!cmpPlayerManager)
continue;

CmpPtr<ICmpPlayer> cmpPlayer(GetSimContext(), cmpPlayerManager->GetPlayerByID(ownerId));
if (!cmpPlayer)
continue;

CmpPtr<ICmpVisual> cmpVisualActor(GetSimContext(), m_MarkerEntityIds[i]);
if (cmpVisualActor)
cmpVisualActor->SetVariant("civ", CStrW(cmpPlayer->GetCiv()).ToUTF8());
}
m_LastMarkerCount = m_RallyPoints.size() - 1;
}		}
		void CCmpRallyPointRenderer::Serialize(ISerializer& serialize)
void CCmpRallyPointRenderer::RecomputeAllRallyPointPaths()
{		{
m_Path.clear();		CCmpItineraryPointRenderer::Serialize(serialize);
m_VisibilitySegments.clear();
m_TexturedOverlayLines.clear();

//// <DEBUG> ///////////////////////////////////////////////
if (m_EnableDebugNodeOverlay)
m_DebugNodeOverlays.clear();
//// </DEBUG> //////////////////////////////////////////////

if (!IsSet())
return; // no use computing a path if the rally point isn't set

CmpPtr<ICmpPosition> cmpPosition(GetEntityHandle());
if (!cmpPosition \|\| !cmpPosition->IsInWorld())
return; // no point going on if this entity doesn't have a position or is outside of the world

CmpPtr<ICmpFootprint> cmpFootprint(GetEntityHandle());
CmpPtr<ICmpPathfinder> cmpPathfinder(GetSystemEntity());

for (size_t i = 0; i < m_RallyPoints.size(); ++i)
{
RecomputeRallyPointPath(i, cmpPosition, cmpFootprint, cmpPathfinder);
}
}		}
		void CCmpRallyPointRenderer::Deserialize(const CParamNode& paramNode, IDeserializer& deserialize)
void CCmpRallyPointRenderer::RecomputeRallyPointPath_wrapper(size_t index)
{		{
if (!IsSet())		CCmpItineraryPointRenderer::Deserialize(paramNode, deserialize);
return; // no use computing a path if the rally point isn't set

CmpPtr<ICmpPosition> cmpPosition(GetEntityHandle());
if (!cmpPosition \|\| !cmpPosition->IsInWorld())
return; // no point going on if this entity doesn't have a position or is outside of the world

CmpPtr<ICmpFootprint> cmpFootprint(GetEntityHandle());
CmpPtr<ICmpPathfinder> cmpPathfinder(GetSystemEntity());

RecomputeRallyPointPath(index, cmpPosition, cmpFootprint, cmpPathfinder);
}		}

void CCmpRallyPointRenderer::RecomputeRallyPointPath(size_t index, CmpPtr<ICmpPosition>& cmpPosition, CmpPtr<ICmpFootprint>& cmpFootprint, CmpPtr<ICmpPathfinder> cmpPathfinder)		void CCmpRallyPointRenderer::AddPosition(CFixedVector2D pos, bool recompute)
{
while (index >= m_Path.size())
{		{
std::vector<CVector2D> tmp;		CCmpItineraryPointRenderer::AddPosition(pos, recompute);
m_Path.push_back(tmp);
}		}
m_Path[index].clear();		void CCmpRallyPointRenderer::AddPosition_wrapper(const CFixedVector2D& pos)

while (index >= m_VisibilitySegments.size())
{		{
std::deque<SVisibilitySegment> tmp;		CCmpItineraryPointRenderer::AddPosition_wrapper(pos);
m_VisibilitySegments.push_back(tmp);
}		}
m_VisibilitySegments[index].clear();

// Find a long path to the goal point -- this uses the tile-based pathfinder, which will return a
// list of waypoints (i.e. a Path) from the goal to the foundation/previous rally point, where each
// waypoint is centered at a tile. We'll have to do some post-processing on the path to get it smooth.
Path path;
std::vector<Waypoint>& waypoints = path.m_Waypoints;

CFixedVector2D start(cmpPosition->GetPosition2D());
Goal goal = { Goal::POINT, m_RallyPoints[index].X, m_RallyPoints[index].Y };

if (index == 0)
GetClosestsEdgePointFrom(start,m_RallyPoints[index], cmpPosition, cmpFootprint);
else
{
start.X = m_RallyPoints[index-1].X;
start.Y = m_RallyPoints[index-1].Y;
}
cmpPathfinder->ComputePath(start.X, start.Y, goal, cmpPathfinder->GetPassabilityClass(m_LinePassabilityClass), path);

// Check if we got a path back; if not we probably have two markers less than one tile apart.
if (path.m_Waypoints.size() < 2)
{
m_Path[index].emplace_back(start.X.ToFloat(), start.Y.ToFloat());
m_Path[index].emplace_back(m_RallyPoints[index].X.ToFloat(), m_RallyPoints[index].Y.ToFloat());
return;
}
else if (index == 0)
{
// sometimes this ends up not being optimal if you asked for a long path, so improve.
CFixedVector2D newend(waypoints[waypoints.size()-2].x,waypoints[waypoints.size()-2].z);
GetClosestsEdgePointFrom(newend,newend, cmpPosition, cmpFootprint);
waypoints.back().x = newend.X;
waypoints.back().z = newend.Y;
}
else
{
// make sure we actually start at the rallypoint because the pathfinder moves us to a usable tile.
waypoints.back().x = m_RallyPoints[index-1].X;
waypoints.back().z = m_RallyPoints[index-1].Y;
}

// pathfinder makes us go to the nearest passable cell which isn't always what we want
waypoints[0].x = m_RallyPoints[index].X;
waypoints[0].z = m_RallyPoints[index].Y;

// From here on, we choose to represent the waypoints as CVector2D floats to avoid to have to convert back and forth
// between fixed-point Waypoint/CFixedVector2D and various other float-based formats used by interpolation and whatnot.
// Since we'll only be further using these points for rendering purposes, using floats should be fine.

for (Waypoint& waypoint : waypoints)
m_Path[index].emplace_back(waypoint.x.ToFloat(), waypoint.z.ToFloat());

// add the start position
// m_Path[index].emplace_back(m_RallyPoints[index].X.ToFloat(), m_RallyPoints[index].Y.ToFloat());

// Post-processing

// Linearize the path;
// Pass through the waypoints, averaging each waypoint with its next one except the last one. Because the path
// goes from the marker to this entity/the previous flag and we want to keep the point at the marker's exact position,
// loop backwards through the waypoints so that the marker waypoint is maintained.
// TODO: see if we can do this at the same time as the waypoint -> coord conversion above
for(size_t i = m_Path[index].size() - 2; i > 0; --i)
m_Path[index][i] = (m_Path[index][i] + m_Path[index][i-1]) / 2.0f;

// if there's a footprint and this path starts from this entity, remove any points returned by the pathfinder that may be on obstructed footprint tiles
//if (index == 0 && cmpFootprint)
// FixFootprintWaypoints(m_Path[index], cmpPosition, cmpFootprint);

// Eliminate some consecutive waypoints that are visible from eachother. Reduce across a maximum distance of approx. 6 tiles
// (prevents segments that are too long to properly stick to the terrain)
ReduceSegmentsByVisibility(m_Path[index], 6);

// Debug overlays
if (m_EnableDebugNodeOverlay)
{
while (index >= m_DebugNodeOverlays.size())
m_DebugNodeOverlays.emplace_back();

m_DebugNodeOverlays[index].clear();
}
if (m_EnableDebugNodeOverlay && m_SmoothPath)
{
// Create separate control point overlays so we can differentiate when using smoothing (offset them a little higher from the
// terrain so we can still see them after the interpolated points are added)
for (CVector2D& point : m_Path[index])
{
SOverlayLine overlayLine;
overlayLine.m_Color = CColor(1.0f, 0.0f, 0.0f, 1.0f);
overlayLine.m_Thickness = 2;
SimRender::ConstructSquareOnGround(GetSimContext(), point.X, point.Y, 0.2f, 0.2f, 1.0f, overlayLine, true);
m_DebugNodeOverlays[index].push_back(overlayLine);
}
}

if (m_SmoothPath)
// The number of points to interpolate goes hand in hand with the maximum amount of node links allowed to be joined together
// by the visibility reduction. The more node links that can be joined together, the more interpolated points you need to
// generate to be able to deal with local terrain height changes.
SimRender::InterpolatePointsRNS(m_Path[index], false, 0, 4); // no offset, keep line at its exact path

// find which point is the last visible point before going into the SoD, so we have a point to compare to on the next turn
GetVisibilitySegments(m_VisibilitySegments[index], index);

// build overlay lines for the new path
ConstructOverlayLines(index);
}

void CCmpRallyPointRenderer::ConstructAllOverlayLines()		void CCmpRallyPointRenderer::ConstructAllOverlayLines()
{		{
m_TexturedOverlayLines.clear();		CCmpItineraryPointRenderer::ConstructAllOverlayLines();

for (size_t i = 0; i < m_Path.size(); ++i)
ConstructOverlayLines(i);
}		}

void CCmpRallyPointRenderer::ConstructOverlayLines(size_t index)		void CCmpRallyPointRenderer::ConstructOverlayLines(size_t index)
{		{
// We need to create a new SOverlayTexturedLine every time we want to change the coordinates after having passed it to the		// We need to create a new SOverlayTexturedLine every time we want to change the coordinates after having passed it to the
// renderer, because it does some fancy vertex buffering thing and caches them internally instead of recomputing them on every		// renderer, because it does some fancy vertex buffering thing and caches them internally instead of recomputing them on every
// pass (which is only sensible).		// pass (which is only sensible).
while (index >= m_TexturedOverlayLines.size())		while (index >= m_TexturedOverlayLines.size())
{		{
std::vector<SOverlayTexturedLine> tmp;		std::vector<SOverlayTexturedLine> tmp;
m_TexturedOverlayLines.push_back(tmp);		m_TexturedOverlayLines.push_back(tmp);
}		}
m_TexturedOverlayLines[index].clear();
		std::vector<std::vector<SOverlayTexturedLine> >::iterator iter = m_TexturedOverlayLines.begin();
		size_t count = index;
		while (count--)
		iter++;
		(*iter).clear();

if (m_Path[index].size() < 2)		if (m_Path[index].size() < 2)
return;		return;

LineCapType dashesLineCapType = SOverlayTexturedLine::LINECAP_ROUND; // line caps to use for the dashed segments (and any other segment's edges that border it)		LineCapType dashesLineCapType = SOverlayTexturedLine::LINECAP_ROUND; // line caps to use for the dashed segments (and any other segment's edges that border it)

for (std::deque<SVisibilitySegment>::const_iterator it = m_VisibilitySegments[index].begin(); it != m_VisibilitySegments[index].end(); ++it)		for (std::vector<SVisibilitySegment>::const_iterator it = m_VisibilitySegments[index].begin(); it != m_VisibilitySegments[index].end(); ++it)
{		{
const SVisibilitySegment& segment = (*it);		const SVisibilitySegment& segment = (*it);

if (segment.m_Visible)		if (segment.m_Visible)
{		{
// does this segment border on the building or rally point flag on either side?		// does this segment border on the building or rally point flag on either side?
bool bordersBuilding = (segment.m_EndIndex == m_Path[index].size() - 1);		bool bordersBuilding = (segment.m_EndIndex == m_Path[index].size() - 1);
bool bordersFlag = (segment.m_StartIndex == 0);		bool bordersFlag = (segment.m_StartIndex == 0);
Show All 16 Lines	if (segment.m_Visible)
// push overlay line coordinates		// push overlay line coordinates
ENSURE(segment.m_EndIndex > segment.m_StartIndex);		ENSURE(segment.m_EndIndex > segment.m_StartIndex);
for (size_t j = segment.m_StartIndex; j <= segment.m_EndIndex; ++j) // end index is inclusive here		for (size_t j = segment.m_StartIndex; j <= segment.m_EndIndex; ++j) // end index is inclusive here
{		{
overlayLine.m_Coords.push_back(m_Path[index][j].X);		overlayLine.m_Coords.push_back(m_Path[index][j].X);
overlayLine.m_Coords.push_back(m_Path[index][j].Y);		overlayLine.m_Coords.push_back(m_Path[index][j].Y);
}		}

m_TexturedOverlayLines[index].push_back(overlayLine);		(*iter).push_back(overlayLine);
}		}
else		else
{		{
// construct dashed line from startPointIdx to endPointIdx; add textured overlay lines for it to the render list		// construct dashed line from startPointIdx to endPointIdx; add textured overlay lines for it to the render list
std::vector<CVector2D> straightLine;		std::vector<CVector2D> straightLine;
straightLine.push_back(m_Path[index][segment.m_StartIndex]);		straightLine.push_back(m_Path[index][segment.m_StartIndex]);
straightLine.push_back(m_Path[index][segment.m_EndIndex]);		straightLine.push_back(m_Path[index][segment.m_EndIndex]);

// We always want to the dashed line to end at either point with a full dash (i.e. not a cleared space), so that the dashed		// We always want to the dashed line to end at either point with a full dash (i.e. not a cleared space), so that the dashed
// area is visually obvious. This requires some calculations to see what size we should make the dashes and clears for them		// area is visually obvious. This requires some calculations to see what size we should make the dashes and clears for them
// to fit exactly.		// to fit exactly.

float maxDashSize = 3.f;		float maxDashSize = 3.f;
float maxClearSize = 3.f;		float maxClearSize = 3.f;

float dashSize = maxDashSize;		float dashSize = maxDashSize;
float clearSize = maxClearSize;		float clearSize = maxClearSize;
float pairDashRatio = (dashSize / (dashSize + clearSize)); // ratio of the dash's length to a (dash + clear) pair's length		float pairDashRatio = (dashSize / (dashSize + clearSize)); // ratio of the dash's length to a (dash + clear) pair's length

float distance = (m_Path[index][segment.m_StartIndex] - m_Path[index][segment.m_EndIndex]).Length(); // straight-line distance between the points		float distance = (m_Path[index][segment.m_StartIndex] - m_Path[index][segment.m_EndIndex]).Length(); // straight-line distance between the points

// See how many pairs (dash + clear) of unmodified size can fit into the distance. Then check the remaining distance; if it's not exactly		// See how many pairs (dash + clear) of unmodified size can fit into the distance. Then check the remaining distance; if it's not exactly
// a dash size's worth (which it probably won't be), then adjust the dash/clear sizes slightly so that it is.		// a dash size's worth (which it probably won't be), then adjust the dash/clear sizes slightly so that it is.
int numFitUnmodified = floor(distance/(dashSize + clearSize));		int numFitUnmodified = floor(distance / (dashSize + clearSize));
float remainderDistance = distance - (numFitUnmodified * (dashSize + clearSize));		float remainderDistance = distance - (numFitUnmodified * (dashSize + clearSize));

// Now we want to make remainderDistance equal exactly one dash size (i.e. maxDashSize) by scaling dashSize and clearSize slightly.		// Now we want to make remainderDistance equal exactly one dash size (i.e. maxDashSize) by scaling dashSize and clearSize slightly.
// We have (remainderDistance - maxDashSize) of space to distribute over numFitUnmodified instances of (dashSize + clearSize) to make		// We have (remainderDistance - maxDashSize) of space to distribute over numFitUnmodified instances of (dashSize + clearSize) to make
// it fit, so each (dashSize + clearSize) pair needs to adjust its length by (remainderDistance - maxDashSize)/numFitUnmodified		// it fit, so each (dashSize + clearSize) pair needs to adjust its length by (remainderDistance - maxDashSize)/numFitUnmodified
// (which will be positive or negative accordingly). This number can then be distributed further proportionally among the dash's		// (which will be positive or negative accordingly). This number can then be distributed further proportionally among the dash's
// length and the clear's length.		// length and the clear's length.

// we always want to have at least one dash/clear pair (i.e., "\|===\| \|===\|"); also, we need to avoid division by zero below.		// We always want to have at least one dash/clear pair (i.e., "\|===\| \|===\|"); also, we need to avoid division by zero below.
numFitUnmodified = std::max(1, numFitUnmodified);		numFitUnmodified = std::max(1, numFitUnmodified);

float pairwiseLengthDifference = (remainderDistance - maxDashSize)/numFitUnmodified; // can be either positive or negative		// Can be either positive or negative
		float pairwiseLengthDifference = (remainderDistance - maxDashSize) / numFitUnmodified;
dashSize += pairDashRatio * pairwiseLengthDifference;		dashSize += pairDashRatio * pairwiseLengthDifference;
clearSize += (1 - pairDashRatio) * pairwiseLengthDifference;		clearSize += (1 - pairDashRatio) * pairwiseLengthDifference;

// ------------------------------------------------------------------------------------------------

SDashedLine dashedLine;		SDashedLine dashedLine;
SimRender::ConstructDashedLine(straightLine, dashedLine, dashSize, clearSize);		SimRender::ConstructDashedLine(straightLine, dashedLine, dashSize, clearSize);

// build overlay lines for dashes		// Build overlay lines for dashes
size_t numDashes = dashedLine.m_StartIndices.size();		size_t numDashes = dashedLine.m_StartIndices.size();
for (size_t i=0; i < numDashes; i++)		for (size_t i = 0; i < numDashes; i++)
{		{
SOverlayTexturedLine dashOverlay;		SOverlayTexturedLine dashOverlay;

dashOverlay.m_Thickness = m_LineThickness;		dashOverlay.m_Thickness = m_LineThickness;
dashOverlay.m_SimContext = &GetSimContext();		dashOverlay.m_SimContext = &GetSimContext();
dashOverlay.m_TextureBase = m_Texture;		dashOverlay.m_TextureBase = m_Texture;
dashOverlay.m_TextureMask = m_TextureMask;		dashOverlay.m_TextureMask = m_TextureMask;
dashOverlay.m_Color = m_LineDashColor;		dashOverlay.m_Color = m_LineDashColor;
dashOverlay.m_Closed = false;		dashOverlay.m_Closed = false;
dashOverlay.m_StartCapType = dashesLineCapType;		dashOverlay.m_StartCapType = dashesLineCapType;
dashOverlay.m_EndCapType = dashesLineCapType;		dashOverlay.m_EndCapType = dashesLineCapType;
dashOverlay.m_AlwaysVisible = true;		dashOverlay.m_AlwaysVisible = true;
// TODO: maybe adjust the elevation of the dashes to be a little lower, so that it slides underneath the actual path

		// TODO: maybe adjust the elevation of the dashes to be a little lower, so that it slides underneath the actual path
size_t dashStartIndex = dashedLine.m_StartIndices[i];		size_t dashStartIndex = dashedLine.m_StartIndices[i];
size_t dashEndIndex = dashedLine.GetEndIndex(i);		size_t dashEndIndex = dashedLine.GetEndIndex(i);
ENSURE(dashEndIndex > dashStartIndex);		ENSURE(dashEndIndex > dashStartIndex);

for (size_t n = dashStartIndex; n < dashEndIndex; n++)		for (size_t n = dashStartIndex; n < dashEndIndex; n++)
{		{
dashOverlay.m_Coords.push_back(dashedLine.m_Points[n].X);		dashOverlay.m_Coords.push_back(dashedLine.m_Points[n].X);
dashOverlay.m_Coords.push_back(dashedLine.m_Points[n].Y);		dashOverlay.m_Coords.push_back(dashedLine.m_Points[n].Y);
}		}

m_TexturedOverlayLines[index].push_back(dashOverlay);		(*iter).push_back(dashOverlay);
}		}

}		}
}		}

//// <DEBUG> //////////////////////////////////////////////
if (m_EnableDebugNodeOverlay)		if (m_EnableDebugNodeOverlay)
{		{
while (index >= m_DebugNodeOverlays.size())		while (index >= m_DebugNodeOverlays.size())
{		{
std::vector<SOverlayLine> tmp;		std::vector<SOverlayLine> tmp;
m_DebugNodeOverlays.push_back(tmp);		m_DebugNodeOverlays.push_back(tmp);
}		}
for (size_t j = 0; j < m_Path[index].size(); ++j)		for (size_t j = 0; j < m_Path[index].size(); ++j)
{		{
SOverlayLine overlayLine;		SOverlayLine overlayLine;
overlayLine.m_Color = CColor(1.0f, 1.0f, 1.0f, 1.0f);		overlayLine.m_Color = CColor(1.0f, 1.0f, 1.0f, 1.0f);
overlayLine.m_Thickness = 1;		overlayLine.m_Thickness = 1;
SimRender::ConstructCircleOnGround(GetSimContext(), m_Path[index][j].X, m_Path[index][j].Y, 0.075f, overlayLine, true);		SimRender::ConstructCircleOnGround(GetSimContext(), m_Path[index][j].X, m_Path[index][j].Y, 0.075f, overlayLine, true);
m_DebugNodeOverlays[index].push_back(overlayLine);		m_DebugNodeOverlays[index].push_back(overlayLine);
}		}
}		}
//// </DEBUG> //////////////////////////////////////////////
}		}
		void CCmpRallyPointRenderer::FixFootprintWaypoints(std::vector<CVector2D>& coords, CmpPtr<ICmpPosition> cmpPosition, CmpPtr<ICmpFootprint> cmpFootprint) const
void CCmpRallyPointRenderer::UpdateOverlayLines()
{		{
// We should only do this if the rally point is currently being displayed and set inside the world, otherwise it's a massive		ENSURE(cmpPosition);
// waste of time to calculate all this stuff (this method is called every turn)		ENSURE(cmpFootprint);
if (!m_Displayed \|\| !IsSet())
return;		// -----------------------------------------------------------------------------------------------------
		// TODO: nasty fixed/float conversions everywhere

		// grab the shape and dimensions of the footprint
		entity_pos_t footprintSize0, footprintSize1, footprintHeight;
		ICmpFootprint::EShape footprintShape;
		cmpFootprint->GetShape(footprintShape, footprintSize0, footprintSize1, footprintHeight);

		// grab the center of the footprint
		CFixedVector2D center = cmpPosition->GetPosition2D();

		// -----------------------------------------------------------------------------------------------------

// see if there have been any changes to the SoD by grabbing the visibility edge points and comparing them to the previous ones		switch (footprintShape)
std::deque<std::deque<SVisibilitySegment> > newVisibilitySegments;
for (size_t i = 0; i < m_Path.size(); ++i)
{		{
std::deque<SVisibilitySegment> tmp;		case ICmpFootprint::SQUARE:
newVisibilitySegments.push_back(tmp);		{
GetVisibilitySegments(newVisibilitySegments[i], i);		// in this case, footprintSize0 and 1 indicate the size along the X and Z axes, respectively.
}
		// the building's footprint could be rotated any which way, so let's get the rotation around the Y axis
		// and the rotated unit vectors in the X/Z plane of the shape's footprint
		// (the Footprint itself holds only the outline, the Position holds the orientation)

// Check if the full path changed, then reconstruct all overlay lines, otherwise check if a segment changed and update that.		fixed s, c; // sine and cosine of the Y axis rotation angle (aka the yaw)
if (m_VisibilitySegments.size() != newVisibilitySegments.size())		fixed a = cmpPosition->GetRotation().Y;
		sincos_approx(a, s, c);
		CFixedVector2D u(c, -s); // unit vector along the rotated X axis
		CFixedVector2D v(s, c); // unit vector along the rotated Z axis
		CFixedVector2D halfSize(footprintSize0 / 2, footprintSize1 / 2);

		// starting from the start position, check if any points are within the footprint of the building
		// (this is possible if the pathfinder was started from a point located within the footprint)
		for (int i = (int)(coords.size() - 1); i >= 0; i--)
		{
		const CVector2D& wp = coords[i];
		if (Geometry::PointIsInSquare(CFixedVector2D(fixed::FromFloat(wp.X), fixed::FromFloat(wp.Y)) - center, u, v, halfSize))
{		{
m_VisibilitySegments = newVisibilitySegments; // save the new visibility segments to compare against next time		coords.erase(coords.begin() + i);
ConstructAllOverlayLines();
}		}
else		else
{		{
for (size_t i = 0; i < m_VisibilitySegments.size(); ++i)		break; // point no longer inside footprint, from this point on neither will any of the following be
		}
		}

		// add a point right on the edge of the footprint (nearest to the last waypoint) so that it links up nicely with the rest of the path
		CFixedVector2D lastWaypoint(fixed::FromFloat(coords.back().X), fixed::FromFloat(coords.back().Y));
		CFixedVector2D footprintEdgePoint = Geometry::NearestPointOnSquare(lastWaypoint - center, u, v, halfSize); // relative to the shape origin (center)
		CVector2D footprintEdge((center.X + footprintEdgePoint.X).ToFloat(), (center.Y + footprintEdgePoint.Y).ToFloat());
		coords.push_back(footprintEdge);

		}
		break;
		case ICmpFootprint::CIRCLE:
		{
		// in this case, both footprintSize0 and 1 indicate the circle's radius

		for (int i = (int)(coords.size() - 1); i >= 0; i--)
{		{
if (m_VisibilitySegments[i] != newVisibilitySegments[i])		const CVector2D& wp = coords[i];
		fixed pointDistance = (CFixedVector2D(fixed::FromFloat(wp.X), fixed::FromFloat(wp.Y)) - center).Length();
		if (pointDistance <= footprintSize0)
{		{
// The visibility segments have changed, reconstruct the overlay lines to match. NOTE: The path itself doesn't		coords.erase(coords.begin() + i);
// change, only the overlay lines we construct from it.
m_VisibilitySegments[i] = newVisibilitySegments[i]; // save the new visibility segments to compare against next time
ConstructOverlayLines(i);
}
}		}
		else
		{
		break; // point no longer inside footprint, from this point on neither will any of the following be
}		}
}		}

		// add a point right on the edge of the footprint so that it links up nicely with the rest of the path
		CVector2D centerVec2D(center.X.ToFloat(), center.Y.ToFloat());
		CVector2D centerToLast(coords.back() - centerVec2D);
		coords.push_back(centerVec2D + (centerToLast.Normalized() * footprintSize0.ToFloat()));
		}
		break;
		}
		}
void CCmpRallyPointRenderer::GetClosestsEdgePointFrom(CFixedVector2D& result, CFixedVector2D& start, CmpPtr<ICmpPosition> cmpPosition, CmpPtr<ICmpFootprint> cmpFootprint) const		void CCmpRallyPointRenderer::GetClosestsEdgePointFrom(CFixedVector2D& result, CFixedVector2D& start, CmpPtr<ICmpPosition> cmpPosition, CmpPtr<ICmpFootprint> cmpFootprint) const
{		{
ENSURE(cmpPosition);		ENSURE(cmpPosition);
ENSURE(cmpFootprint);		ENSURE(cmpFootprint);

// grab the shape and dimensions of the footprint		// grab the shape and dimensions of the footprint
entity_pos_t footprintSize0, footprintSize1, footprintHeight;		entity_pos_t footprintSize0, footprintSize1, footprintHeight;
ICmpFootprint::EShape footprintShape;		ICmpFootprint::EShape footprintShape;
cmpFootprint->GetShape(footprintShape, footprintSize0, footprintSize1, footprintHeight);		cmpFootprint->GetShape(footprintShape, footprintSize0, footprintSize1, footprintHeight);

// grab the center of the footprint		// grab the center of the footprint
CFixedVector2D center = cmpPosition->GetPosition2D();		CFixedVector2D center = cmpPosition->GetPosition2D();

switch (footprintShape)		switch (footprintShape)
{		{
case ICmpFootprint::SQUARE:		case ICmpFootprint::SQUARE:
{		{
// in this case, footprintSize0 and 1 indicate the size along the X and Z axes, respectively.		// in this case, footprintSize0 and 1 indicate the size along the X and Z axes, respectively.

// the building's footprint could be rotated any which way, so let's get the rotation around the Y axis		// the building's footprint could be rotated any which way, so let's get the rotation around the Y axis
// and the rotated unit vectors in the X/Z plane of the shape's footprint		// and the rotated unit vectors in the X/Z plane of the shape's footprint
// (the Footprint itself holds only the outline, the Position holds the orientation)		// (the Footprint itself holds only the outline, the Position holds the orientation)

fixed s, c; // sine and cosine of the Y axis rotation angle (aka the yaw)		fixed s, c; // sine and cosine of the Y axis rotation angle (aka the yaw)
fixed a = cmpPosition->GetRotation().Y;		fixed a = cmpPosition->GetRotation().Y;
sincos_approx(a, s, c);		sincos_approx(a, s, c);
CFixedVector2D u(c, -s); // unit vector along the rotated X axis		CFixedVector2D u(c, -s); // unit vector along the rotated X axis
CFixedVector2D v(s, c); // unit vector along the rotated Z axis		CFixedVector2D v(s, c); // unit vector along the rotated Z axis
CFixedVector2D halfSize(footprintSize0/2, footprintSize1/2);		CFixedVector2D halfSize(footprintSize0 / 2, footprintSize1 / 2);

CFixedVector2D footprintEdgePoint = Geometry::NearestPointOnSquare(start - center, u, v, halfSize);		CFixedVector2D footprintEdgePoint = Geometry::NearestPointOnSquare(start - center, u, v, halfSize);
result = center + footprintEdgePoint;		result = center + footprintEdgePoint;
break;		break;
}		}
case ICmpFootprint::CIRCLE:		case ICmpFootprint::CIRCLE:
{		{
// in this case, both footprintSize0 and 1 indicate the circle's radius		// in this case, both footprintSize0 and 1 indicate the circle's radius
// Transform target to the point nearest on the edge.		// Transform target to the point nearest on the edge.
CFixedVector2D centerVec2D(center.X, center.Y);		CFixedVector2D centerVec2D(center.X, center.Y);
CFixedVector2D centerToLast(start - centerVec2D);		CFixedVector2D centerToLast(start - centerVec2D);
centerToLast.Normalize();		centerToLast.Normalize();
result = centerVec2D + (centerToLast.Multiply(footprintSize0));		result = centerVec2D + (centerToLast.Multiply(footprintSize0));
break;		break;
}		}
}		}
}		}
		void CCmpRallyPointRenderer::GetVisibilitySegments(std::vector<SVisibilitySegment>& out, size_t index) const
void CCmpRallyPointRenderer::FixFootprintWaypoints(std::vector<CVector2D>& coords, CmpPtr<ICmpPosition> cmpPosition, CmpPtr<ICmpFootprint> cmpFootprint) const
{		{
ENSURE(cmpPosition);		out.clear();
ENSURE(cmpFootprint);

// -----------------------------------------------------------------------------------------------------		if (m_Path[index].size() < 2)
// TODO: nasty fixed/float conversions everywhere		return;

// grab the shape and dimensions of the footprint		CmpPtr<ICmpRangeManager> cmpRangeMgr(GetSystemEntity());
entity_pos_t footprintSize0, footprintSize1, footprintHeight;
ICmpFootprint::EShape footprintShape;
cmpFootprint->GetShape(footprintShape, footprintSize0, footprintSize1, footprintHeight);

// grab the center of the footprint		player_id_t currentPlayer = GetSimContext().GetCurrentDisplayedPlayer();
CFixedVector2D center = cmpPosition->GetPosition2D();		CLosQuerier losQuerier(cmpRangeMgr->GetLosQuerier(currentPlayer));

// -----------------------------------------------------------------------------------------------------		// go through the path node list, comparing each node's visibility with the previous one. If it changes, end the current segment and start
		// a new one at the next point.

switch (footprintShape)		bool lastVisible = losQuerier.IsExplored(
		(fixed::FromFloat(m_Path[index][0].X) / (int)TERRAIN_TILE_SIZE).ToInt_RoundToNearest(),
		(fixed::FromFloat(m_Path[index][0].Y) / (int)TERRAIN_TILE_SIZE).ToInt_RoundToNearest()
		);
		size_t curSegmentStartIndex = 0; // starting node index of the current segment

		for (size_t k = 1; k < m_Path[index].size(); ++k)
{		{
case ICmpFootprint::SQUARE:		// grab tile indices for this coord
		int i = (fixed::FromFloat(m_Path[index][k].X) / (int)TERRAIN_TILE_SIZE).ToInt_RoundToNearest();
		int j = (fixed::FromFloat(m_Path[index][k].Y) / (int)TERRAIN_TILE_SIZE).ToInt_RoundToNearest();

		bool nodeVisible = losQuerier.IsExplored(i, j);
		if (nodeVisible != lastVisible)
{		{
// in this case, footprintSize0 and 1 indicate the size along the X and Z axes, respectively.		// visibility changed; write out the segment that was just completed and get ready for the new one
		out.push_back(SVisibilitySegment(lastVisible, curSegmentStartIndex, k - 1));

// the building's footprint could be rotated any which way, so let's get the rotation around the Y axis		//curSegmentStartIndex = k; // new segment starts here
// and the rotated unit vectors in the X/Z plane of the shape's footprint		curSegmentStartIndex = k - 1;
// (the Footprint itself holds only the outline, the Position holds the orientation)		lastVisible = nodeVisible;
		}

fixed s, c; // sine and cosine of the Y axis rotation angle (aka the yaw)		}
fixed a = cmpPosition->GetRotation().Y;
sincos_approx(a, s, c);
CFixedVector2D u(c, -s); // unit vector along the rotated X axis
CFixedVector2D v(s, c); // unit vector along the rotated Z axis
CFixedVector2D halfSize(footprintSize0/2, footprintSize1/2);

// starting from the start position, check if any points are within the footprint of the building		// terminate the last segment
// (this is possible if the pathfinder was started from a point located within the footprint)		out.push_back(SVisibilitySegment(lastVisible, curSegmentStartIndex, m_Path[index].size() - 1));
for(int i = (int)(coords.size() - 1); i >= 0; i--)		MergeVisibilitySegments(out);
		}
		void CCmpRallyPointRenderer::HandleMessage(const CMessage& msg, bool UNUSED(global))
{		{
const CVector2D& wp = coords[i];		switch (msg.GetType())
if (Geometry::PointIsInSquare(CFixedVector2D(fixed::FromFloat(wp.X), fixed::FromFloat(wp.Y)) - center, u, v, halfSize))
{		{
coords.erase(coords.begin() + i);		case MT_RenderSubmit:
		{
		PROFILE("RallyPoint::RenderSubmit");
		if (m_Displayed && CCmpItineraryPointRenderer::IsSet())
		{
		const CMessageRenderSubmit& msgData = static_cast<const CMessageRenderSubmit&> (msg);
		RenderSubmit(msgData.collector);
}		}
else		}
		break;
		case MT_OwnershipChanged:
{		{
break; // point no longer inside footprint, from this point on neither will any of the following be		UpdateMarkers(); // update marker variation to new player's civilization
		}
		break;
		case MT_TurnStart:
		{
		UpdateOverlayLines(); // check for changes to the SoD and update the overlay lines accordingly
		}
		break;
		case MT_Destroy:
		{
		for (std::vector<entity_id_t>::iterator it = m_MarkerEntityIds.begin(); it != m_MarkerEntityIds.end(); ++it)
		{
		if (*it != INVALID_ENTITY)
		{
		GetSimContext().GetComponentManager().DestroyComponentsSoon(*it);
		*it = INVALID_ENTITY;
}		}
}		}

// add a point right on the edge of the footprint (nearest to the last waypoint) so that it links up nicely with the rest of the path
CFixedVector2D lastWaypoint(fixed::FromFloat(coords.back().X), fixed::FromFloat(coords.back().Y));
CFixedVector2D footprintEdgePoint = Geometry::NearestPointOnSquare(lastWaypoint - center, u, v, halfSize); // relative to the shape origin (center)
CVector2D footprintEdge((center.X + footprintEdgePoint.X).ToFloat(), (center.Y + footprintEdgePoint.Y).ToFloat());
coords.push_back(footprintEdge);

}		}
break;		break;
case ICmpFootprint::CIRCLE:		case MT_PositionChanged:
{		{
// in this case, both footprintSize0 and 1 indicate the circle's radius		// Unlikely to happen in-game, but can occur in atlas
		// Just recompute the path from the entity to the first rally point
		RecomputeItineraryPointPath_wrapper(0);
		}
		break;
		}
		}
		bool CCmpRallyPointRenderer::IsSet() const
		{
		return CCmpItineraryPointRenderer::IsSet();
		}
		void CCmpRallyPointRenderer::RecomputeAllItineraryPointPaths()
		{
		m_Path.clear();
		m_VisibilitySegments.clear();
		m_TexturedOverlayLines.clear();

for(int i = (int)(coords.size() - 1); i >= 0; i--)		if (!IsSet())
		return;

		CmpPtr<ICmpPosition> cmpPosition(GetSimContext(), GetEntityId());
		if (!cmpPosition \|\| !cmpPosition->IsInWorld())
		return;

		CmpPtr<ICmpFootprint> cmpFootprint(GetSimContext(), GetEntityId());
		CmpPtr<ICmpPathfinder> cmpPathfinder(GetSimContext(), SYSTEM_ENTITY);

		for (size_t i = 0; i < m_ItineraryPoints.size(); ++i)
		RecomputeItineraryPointPath(i, cmpPosition, cmpFootprint, cmpPathfinder);
		}
		void CCmpRallyPointRenderer::RecomputeItineraryPointPath(size_t index, CmpPtr<ICmpPosition>& cmpPosition, CmpPtr<ICmpFootprint>& cmpFootprint, CmpPtr<ICmpPathfinder> cmpPathfinder)
{		{
const CVector2D& wp = coords[i];		while (index >= m_Path.size())
fixed pointDistance = (CFixedVector2D(fixed::FromFloat(wp.X), fixed::FromFloat(wp.Y)) - center).Length();
if (pointDistance <= footprintSize0)
{		{
coords.erase(coords.begin() + i);		std::vector<CVector2D> tmp;
		m_Path.push_back(tmp);
		}
		m_Path[index].clear();

		while (index >= m_VisibilitySegments.size())
		{
		std::vector<SVisibilitySegment> tmp;
		m_VisibilitySegments.push_back(tmp);
}		}
		m_VisibilitySegments[index].clear();

		// Find a long path to the goal point -- this uses the tile-based pathfinder, which will return a
		// list of waypoints (i.e. a Path) from the goal to the foundation/previous rally point, where each
		// waypoint is centered at a tile. We'll have to do some post-processing on the path to get it smooth.
		Path path;
		std::vector<Waypoint>& waypoints = path.m_Waypoints;

		CFixedVector2D start(cmpPosition->GetPosition2D());
		Goal goal = { Goal::POINT, m_ItineraryPoints[index].X, m_ItineraryPoints[index].Y };

		if (index == 0)
		GetClosestsEdgePointFrom(start, m_ItineraryPoints[index], cmpPosition, cmpFootprint);
else		else
{		{
break; // point no longer inside footprint, from this point on neither will any of the following be		start.X = m_ItineraryPoints[index - 1].X;
		start.Y = m_ItineraryPoints[index - 1].Y;
		}
		cmpPathfinder->ComputePath(start.X, start.Y, goal, cmpPathfinder->GetPassabilityClass(m_LinePassabilityClass), path);

		// Check if we got a path back; if not we probably have two markers less than one tile apart.
		if (path.m_Waypoints.size() < 2)
		{
		m_Path[index].emplace_back(start.X.ToFloat(), start.Y.ToFloat());
		m_Path[index].emplace_back(m_ItineraryPoints[index].X.ToFloat(), m_ItineraryPoints[index].Y.ToFloat());
		return;
}		}
		else if (index == 0)
		{
		// sometimes this ends up not being optimal if you asked for a long path, so improve.
		CFixedVector2D newend(waypoints[waypoints.size() - 2].x, waypoints[waypoints.size() - 2].z);
		GetClosestsEdgePointFrom(newend, newend, cmpPosition, cmpFootprint);
		waypoints.back().x = newend.X;
		waypoints.back().z = newend.Y;
		}
		else
		{
		// make sure we actually start at the rallypoint because the pathfinder moves us to a usable tile.
		waypoints.back().x = m_ItineraryPoints[index - 1].X;
		waypoints.back().z = m_ItineraryPoints[index - 1].Y;
}		}

// add a point right on the edge of the footprint so that it links up nicely with the rest of the path		// pathfinder makes us go to the nearest passable cell which isn't always what we want
CVector2D centerVec2D(center.X.ToFloat(), center.Y.ToFloat());		waypoints[0].x = m_ItineraryPoints[index].X;
CVector2D centerToLast(coords.back() - centerVec2D);		waypoints[0].z = m_ItineraryPoints[index].Y;
coords.push_back(centerVec2D + (centerToLast.Normalized() * footprintSize0.ToFloat()));
		// From here on, we choose to represent the waypoints as CVector2D floats to avoid to have to convert back and forth
		// between fixed-point Waypoint/CFixedVector2D and various other float-based formats used by interpolation and whatnot.
		// Since we'll only be further using these points for rendering purposes, using floats should be fine.

		for (Waypoint& waypoint : waypoints)
		m_Path[index].emplace_back(waypoint.x.ToFloat(), waypoint.z.ToFloat());

		// add the start position
		// m_Path[index].emplace_back(m_ItineraryPoints[index].X.ToFloat(), m_ItineraryPoints[index].Y.ToFloat());

		// Post-processing

		// Linearize the path;
		// Pass through the waypoints, averaging each waypoint with its next one except the last one. Because the path
		// goes from the marker to this entity/the previous flag and we want to keep the point at the marker's exact position,
		// loop backwards through the waypoints so that the marker waypoint is maintained.
		// TODO: see if we can do this at the same time as the waypoint -> coord conversion above
		for (size_t i = m_Path[index].size() - 2; i > 0; --i)
		m_Path[index][i] = (m_Path[index][i] + m_Path[index][i - 1]) / 2.0f;

		// if there's a footprint and this path starts from this entity, remove any points returned by the pathfinder that may be on obstructed footprint tiles
		//if (index == 0 && cmpFootprint)
		// FixFootprintWaypoints(m_Path[index], cmpPosition, cmpFootprint);

		// Eliminate some consecutive waypoints that are visible from eachother. Reduce across a maximum distance of approx. 6 tiles
		// (prevents segments that are too long to properly stick to the terrain)
		ReduceSegmentsByVisibility(m_Path[index], 6);

		// Debug overlays
		if (m_EnableDebugNodeOverlay)
		{
		while (index >= m_DebugNodeOverlays.size())
		m_DebugNodeOverlays.emplace_back();

		m_DebugNodeOverlays[index].clear();
}		}
break;		if (m_EnableDebugNodeOverlay && m_SmoothPath)
		{
		// Create separate control point overlays so we can differentiate when using smoothing (offset them a little higher from the
		// terrain so we can still see them after the interpolated points are added)
		for (CVector2D& point : m_Path[index])
		{
		SOverlayLine overlayLine;
		overlayLine.m_Color = CColor(1.0f, 0.0f, 0.0f, 1.0f);
		overlayLine.m_Thickness = 2;
		SimRender::ConstructSquareOnGround(GetSimContext(), point.X, point.Y, 0.2f, 0.2f, 1.0f, overlayLine, true);
		m_DebugNodeOverlays[index].push_back(overlayLine);
}		}
}		}

		if (m_SmoothPath)
		// The number of points to interpolate goes hand in hand with the maximum amount of node links allowed to be joined together
		// by the visibility reduction. The more node links that can be joined together, the more interpolated points you need to
		// generate to be able to deal with local terrain height changes.
		SimRender::InterpolatePointsRNS(m_Path[index], false, 0, 4); // no offset, keep line at its exact path

		// find which point is the last visible point before going into the SoD, so we have a point to compare to on the next turn
		GetVisibilitySegments(m_VisibilitySegments[index], index);

		// build overlay lines for the new path
		ConstructOverlayLines(index);
		}
		void CCmpRallyPointRenderer::RecomputeItineraryPointPath_wrapper(size_t index)
		{
		if (!IsSet())
		return;

		CmpPtr<ICmpPosition> cmpPosition(GetEntityHandle());
		if (!cmpPosition \|\| !cmpPosition->IsInWorld())
		return;

		CmpPtr<ICmpFootprint> cmpFootprint(GetEntityHandle());
		CmpPtr<ICmpPathfinder> cmpPathfinder(GetSystemEntity());

		RecomputeItineraryPointPath(index, cmpPosition, cmpFootprint, cmpPathfinder);
		}
void CCmpRallyPointRenderer::ReduceSegmentsByVisibility(std::vector<CVector2D>& coords, unsigned maxSegmentLinks, bool floating) const		void CCmpRallyPointRenderer::ReduceSegmentsByVisibility(std::vector<CVector2D>& coords, unsigned maxSegmentLinks, bool floating) const
{		{
CmpPtr<ICmpPathfinder> cmpPathFinder(GetSystemEntity());		CmpPtr<ICmpPathfinder> cmpPathFinder(GetSystemEntity());
CmpPtr<ICmpTerrain> cmpTerrain(GetSystemEntity());		CmpPtr<ICmpTerrain> cmpTerrain(GetSystemEntity());
CmpPtr<ICmpWaterManager> cmpWaterManager(GetSystemEntity());		CmpPtr<ICmpWaterManager> cmpWaterManager(GetSystemEntity());
ENSURE(cmpPathFinder && cmpTerrain && cmpWaterManager);		ENSURE(cmpPathFinder && cmpTerrain && cmpWaterManager);

if (coords.size() < 3)		if (coords.size() < 3)
▲ Show 20 Lines • Show All 59 Lines • ▼ Show 20 Lines	if (!curNodeVisible)
{		{
// curNodeIdx == baseNodeIdx + 1		// curNodeIdx == baseNodeIdx + 1
baseNodeIdx = curNodeIdx;		baseNodeIdx = curNodeIdx;
curNodeIdx++; // move the next candidate node one forward so that we don't test a point against itself in the next iteration		curNodeIdx++; // move the next candidate node one forward so that we don't test a point against itself in the next iteration
}		}

newCoords.push_back(coords[baseNodeIdx]); // add new base node to output list		newCoords.push_back(coords[baseNodeIdx]); // add new base node to output list

// update base node coordinates		// update base node coordinates
baseNodeX = fixed::FromFloat(coords[baseNodeIdx].X);		baseNodeX = fixed::FromFloat(coords[baseNodeIdx].X);
baseNodeZ = fixed::FromFloat(coords[baseNodeIdx].Y);		baseNodeZ = fixed::FromFloat(coords[baseNodeIdx].Y);
baseNodeY = cmpTerrain->GetExactGroundLevel(coords[baseNodeIdx].X, coords[baseNodeIdx].Y);		baseNodeY = cmpTerrain->GetExactGroundLevel(coords[baseNodeIdx].X, coords[baseNodeIdx].Y);
if (floating)		if (floating)
baseNodeY = std::max(baseNodeY, cmpWaterManager->GetExactWaterLevel(coords[baseNodeIdx].X, coords[baseNodeIdx].Y));		baseNodeY = std::max(baseNodeY, cmpWaterManager->GetExactWaterLevel(coords[baseNodeIdx].X, coords[baseNodeIdx].Y));
}		}

curNodeIdx++;		curNodeIdx++;
}		}

// we always need to add the last point back to the array; if e.g. all the points up to the last one are all visible from the current		// we always need to add the last point back to the array; if e.g. all the points up to the last one are all visible from the current
// base node, then the loop above just ends and no endpoint is ever added to the list.		// base node, then the loop above just ends and no endpoint is ever added to the list.
ENSURE(curNodeIdx == coords.size());		ENSURE(curNodeIdx == coords.size());
newCoords.push_back(coords[coords.size() - 1]);		newCoords.push_back(coords[coords.size() - 1]);

coords.swap(newCoords);		coords.swap(newCoords);
}		}
		void CCmpRallyPointRenderer::RenderSubmit(SceneCollector& collector)
void CCmpRallyPointRenderer::GetVisibilitySegments(std::deque<SVisibilitySegment>& out, size_t index) const
{		{
out.clear();		CCmpItineraryPointRenderer::RenderSubmit(collector);
		}
if (m_Path[index].size() < 2)		void CCmpRallyPointRenderer::Reset()
return;

CmpPtr<ICmpRangeManager> cmpRangeMgr(GetSystemEntity());

player_id_t currentPlayer = GetSimContext().GetCurrentDisplayedPlayer();
CLosQuerier losQuerier(cmpRangeMgr->GetLosQuerier(currentPlayer));

// go through the path node list, comparing each node's visibility with the previous one. If it changes, end the current segment and start
// a new one at the next point.

bool lastVisible = losQuerier.IsExplored(
(fixed::FromFloat(m_Path[index][0].X) / (int) TERRAIN_TILE_SIZE).ToInt_RoundToNearest(),
(fixed::FromFloat(m_Path[index][0].Y) / (int) TERRAIN_TILE_SIZE).ToInt_RoundToNearest()
);
size_t curSegmentStartIndex = 0; // starting node index of the current segment

for (size_t k = 1; k < m_Path[index].size(); ++k)
{		{
// grab tile indices for this coord		m_ItineraryPoints.clear();
int i = (fixed::FromFloat(m_Path[index][k].X) / (int)TERRAIN_TILE_SIZE).ToInt_RoundToNearest();		RecomputeAllItineraryPointPaths();
int j = (fixed::FromFloat(m_Path[index][k].Y) / (int)TERRAIN_TILE_SIZE).ToInt_RoundToNearest();		UpdateMessageSubscriptions();
		}
bool nodeVisible = losQuerier.IsExplored(i, j);		void CCmpRallyPointRenderer::SetDisplayed(bool displayed)
if (nodeVisible != lastVisible)
{		{
// visibility changed; write out the segment that was just completed and get ready for the new one		CCmpItineraryPointRenderer::SetDisplayed(displayed);
out.push_back(SVisibilitySegment(lastVisible, curSegmentStartIndex, k - 1));

//curSegmentStartIndex = k; // new segment starts here
curSegmentStartIndex = k - 1;
lastVisible = nodeVisible;
}		}
		void CCmpRallyPointRenderer::SetPosition(const CFixedVector2D& pos)
		{
		CCmpItineraryPointRenderer::SetPosition(pos);
}		}
		void CCmpRallyPointRenderer::UpdateMarkers()
		{
		player_id_t previousOwner = m_LastOwner;
		for (size_t i = 0; i < m_ItineraryPoints.size(); ++i)
		{
		if (i >= m_MarkerEntityIds.size())
		m_MarkerEntityIds.push_back(INVALID_ENTITY);

// terminate the last segment		if (m_MarkerEntityIds[i] == INVALID_ENTITY)
out.push_back(SVisibilitySegment(lastVisible, curSegmentStartIndex, m_Path[index].size() - 1));		{
		// no marker exists yet, create one first
		CComponentManager& componentMgr = GetSimContext().GetComponentManager();

MergeVisibilitySegments(out);		// allocate a new entity for the marker
		if (!m_MarkerTemplate.empty())
		{
		m_MarkerEntityIds[i] = componentMgr.AllocateNewLocalEntity();
		if (m_MarkerEntityIds[i] != INVALID_ENTITY)
		m_MarkerEntityIds[i] = componentMgr.AddEntity(m_MarkerTemplate, m_MarkerEntityIds[i]);
		}
}		}

void CCmpRallyPointRenderer::MergeVisibilitySegments(std::deque<SVisibilitySegment>& segments)		// the marker entity should be valid at this point, otherwise something went wrong trying to allocate it
		if (m_MarkerEntityIds[i] == INVALID_ENTITY)
		LOGERROR("Failed to create rally point marker entity");

		CmpPtr<ICmpPosition> markerCmpPosition(GetSimContext(), m_MarkerEntityIds[i]);
		if (markerCmpPosition)
		{
		if (m_Displayed && CCmpItineraryPointRenderer::IsSet())
{		{
// Scan for single-point segments; if they are inbetween two other segments, delete them and merge the surrounding segments.		markerCmpPosition->MoveTo(m_ItineraryPoints[i].X, m_ItineraryPoints[i].Y);
// If they're at either end of the path, include them in their bordering segment (but only if those bordering segments aren't
// themselves single-point segments, because then we would want those to get absorbed by its surrounding ones first).

// first scan for absorptions of single-point surrounded segments (i.e. excluding edge segments)
size_t numSegments = segments.size();

// WARNING: FOR LOOP TRICKERY AHEAD!
for (size_t i = 1; i < numSegments - 1;)
{
SVisibilitySegment& segment = segments[i];
if (segment.IsSinglePoint())
{
// since the segments' visibility alternates, the surrounding ones should have the same visibility
ENSURE(segments[i-1].m_Visible == segments[i+1].m_Visible);

segments[i-1].m_EndIndex = segments[i+1].m_EndIndex; // make previous segment span all the way across to the next
segments.erase(segments.begin() + i); // erase this segment ...
segments.erase(segments.begin() + i); // and the next (we removed [i], so [i+1] is now at position [i])
numSegments -= 2; // we removed 2 segments, so update the loop condition
// in the next iteration, i should still point to the segment right after the one that got expanded, which is now
// at position i; so don't increment i here
}		}
else		else
{		{
++i;		markerCmpPosition->MoveOutOfWorld(); // hide it
}		}
}		}

ENSURE(numSegments == segments.size());		// set rally point flag selection based on player civilization
		CmpPtr<ICmpOwnership> cmpOwnership(GetEntityHandle());
// check to see if the first segment needs to be merged with its neighbour		if (!cmpOwnership)
if (segments.size() >= 2 && segments[0].IsSinglePoint())		continue;
{
int firstSegmentStartIndex = segments.front().m_StartIndex;
ENSURE(firstSegmentStartIndex == 0);
ENSURE(!segments[1].IsSinglePoint()); // at this point, the second segment should never be a single-point segment

segments.erase(segments.begin());		player_id_t ownerId = cmpOwnership->GetOwner();
segments.front().m_StartIndex = firstSegmentStartIndex;		if (ownerId == INVALID_PLAYER \|\| (ownerId == previousOwner && m_LastMarkerCount >= i))
}		continue;

// check to see if the last segment needs to be merged with its neighbour		m_LastOwner = ownerId;
if (segments.size() >= 2 && segments[segments.size()-1].IsSinglePoint())		CmpPtr<ICmpPlayerManager> cmpPlayerManager(GetSystemEntity());
{		// cmpPlayerManager should not be null as long as this method is called on-demand instead of at Init() time
int lastSegmentEndIndex = segments.back().m_EndIndex;		// (we can't rely on component initialization order in Init())
ENSURE(!segments[segments.size()-2].IsSinglePoint()); // at this point, the second-to-last segment should never be a single-point segment		if (!cmpPlayerManager)
		continue;

segments.erase(segments.end());		CmpPtr<ICmpPlayer> cmpPlayer(GetSimContext(), cmpPlayerManager->GetPlayerByID(ownerId));
segments.back().m_EndIndex = lastSegmentEndIndex;		if (!cmpPlayer)
}		continue;

// --------------------------------------------------------------------------------------------------------		CmpPtr<ICmpVisual> cmpVisualActor(GetSimContext(), m_MarkerEntityIds[i]);
// at this point, every segment should have at least 2 points		if (cmpVisualActor)
for (size_t i = 0; i < segments.size(); ++i)		cmpVisualActor->SetVariant("civ", CStrW(cmpPlayer->GetCiv()).ToUTF8());
{
ENSURE(!segments[i].IsSinglePoint());
ENSURE(segments[i].m_EndIndex > segments[i].m_StartIndex);
}		}
		m_LastMarkerCount = m_ItineraryPoints.size() - 1;
}		}
		void CCmpRallyPointRenderer::UpdateMessageSubscriptions()
void CCmpRallyPointRenderer::RenderSubmit(SceneCollector& collector)
{		{
// we only get here if the rally point is set and should be displayed		GetSimContext().GetComponentManager().DynamicSubscriptionNonsync(MT_RenderSubmit, this, m_Displayed && CCmpItineraryPointRenderer::IsSet());
for (size_t i = 0; i < m_TexturedOverlayLines.size(); ++i)
{
for (size_t j = 0; j < m_TexturedOverlayLines[i].size(); ++j)
{
if (!m_TexturedOverlayLines[i][j].m_Coords.empty())
collector.Submit(&m_TexturedOverlayLines[i][j]);
}
}		}
		void CCmpRallyPointRenderer::UpdatePosition(u32 rallyPointId, const CFixedVector2D& pos)
if (m_EnableDebugNodeOverlay && !m_DebugNodeOverlays.empty())
{		{
for (size_t i = 0; i < m_DebugNodeOverlays.size(); ++i)		if (rallyPointId >= m_ItineraryPoints.size())
for (size_t j = 0; j < m_DebugNodeOverlays[i].size(); ++j)		return;
collector.Submit(&m_DebugNodeOverlays[i][j]);
		m_ItineraryPoints[rallyPointId] = pos;

		UpdateMarkers();

		// Compute a new path for the current, and if existing the next rally point
		RecomputeItineraryPointPath_wrapper(rallyPointId);
		if (rallyPointId + 1 < m_ItineraryPoints.size())
		RecomputeItineraryPointPath_wrapper(rallyPointId + 1);
}		}
		void CCmpRallyPointRenderer::UpdateOverlayLines()
		{
		CCmpItineraryPointRenderer::UpdateOverlayLines();
}		}