Differential D3076 Diff 13819 source/graphics/LOSTexture.cpp

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source/graphics/LOSTexture.cpp

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* 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 "LOSTexture.h"		#include "LOSTexture.h"

#include "graphics/ShaderManager.h"		#include "graphics/ShaderManager.h"
#include "graphics/Terrain.h"
#include "lib/bits.h"		#include "lib/bits.h"
#include "lib/config2.h"		#include "lib/config2.h"
#include "ps/CLogger.h"		#include "ps/CLogger.h"
#include "ps/Game.h"		#include "ps/Game.h"
#include "ps/Profile.h"		#include "ps/Profile.h"
#include "renderer/Renderer.h"		#include "renderer/Renderer.h"
#include "renderer/RenderingOptions.h"		#include "renderer/RenderingOptions.h"
#include "renderer/TimeManager.h"		#include "renderer/TimeManager.h"
#include "simulation2/Simulation2.h"		#include "simulation2/Simulation2.h"
#include "simulation2/components/ICmpRangeManager.h"		#include "simulation2/components/ICmpRangeManager.h"
#include "simulation2/components/ICmpTerrain.h"
#include "simulation2/helpers/Los.h"		#include "simulation2/helpers/Los.h"

/*		/*

The LOS bitmap is computed with one value per map vertex, based on		The LOS bitmap is computed with one value per LOS vertex, based on
CCmpRangeManager's visibility information.		CCmpRangeManager's visibility information.

The bitmap is then blurred using an NxN filter (in particular a		The bitmap is then blurred using an NxN filter (in particular a
7-tap Binomial filter as an efficient integral approximation of a Gaussian).		7-tap Binomial filter as an efficient integral approximation of a Gaussian).
To implement the blur efficiently without using extra memory for a second copy		To implement the blur efficiently without using extra memory for a second copy
of the bitmap, we generate the bitmap with (N-1)/2 pixels of padding on each side,		of the bitmap, we generate the bitmap with (N-1)/2 pixels of padding on each side,
then the blur shifts the image back into the corner.		then the blur shifts the image back into the corner.

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const CMatrix3D* CLOSTexture::GetMinimapTextureMatrix()		const CMatrix3D* CLOSTexture::GetMinimapTextureMatrix()
{		{
ENSURE(!m_Dirty);		ENSURE(!m_Dirty);
return &m_MinimapTextureMatrix;		return &m_MinimapTextureMatrix;
}		}

void CLOSTexture::ConstructTexture(int unit)		void CLOSTexture::ConstructTexture(int unit)
{		{
CmpPtr<ICmpTerrain> cmpTerrain(m_Simulation, SYSTEM_ENTITY);		CmpPtr<ICmpRangeManager> cmpRangeManager(m_Simulation, SYSTEM_ENTITY);
if (!cmpTerrain)		if (!cmpRangeManager)
return;		return;

m_MapSize = cmpTerrain->GetVerticesPerSide();		m_MapSize = cmpRangeManager->GetVerticesPerSide();

m_TextureSize = (GLsizei)round_up_to_pow2(round_up((size_t)m_MapSize + g_BlurSize - 1, g_SubTextureAlignment));		m_TextureSize = (GLsizei)round_up_to_pow2(round_up((size_t)m_MapSize + g_BlurSize - 1, g_SubTextureAlignment));

glGenTextures(1, &m_Texture);		glGenTextures(1, &m_Texture);

// Initialise texture with SoD color, for the areas we don't		// Initialise texture with SoD color, for the areas we don't
// overwrite with glTexSubImage2D later		// overwrite with glTexSubImage2D later
u8* texData = new u8[m_TextureSize * m_TextureSize * 4];		u8* texData = new u8[m_TextureSize * m_TextureSize * 4];
Show All 30 Lines	void CLOSTexture::ConstructTexture(int unit)

{		{
// Texture matrix: We want to map		// Texture matrix: We want to map
// world pos (0, y, 0) (i.e. first vertex)		// world pos (0, y, 0) (i.e. first vertex)
// onto texcoord (0.5/texsize, 0.5/texsize) (i.e. middle of first texel);		// onto texcoord (0.5/texsize, 0.5/texsize) (i.e. middle of first texel);
// world pos ((mapsize-1)cellsize, y, (mapsize-1)cellsize) (i.e. last vertex)		// world pos ((mapsize-1)cellsize, y, (mapsize-1)cellsize) (i.e. last vertex)
// onto texcoord ((mapsize-0.5) / texsize, (mapsize-0.5) / texsize) (i.e. middle of last texel)		// onto texcoord ((mapsize-0.5) / texsize, (mapsize-0.5) / texsize) (i.e. middle of last texel)

float s = (m_MapSize-1) / (float)(m_TextureSize * (m_MapSize-1) * TERRAIN_TILE_SIZE);		float s = (m_MapSize-1) / (float)(m_TextureSize * (m_MapSize-1) * LOS_TILE_SIZE);
float t = 0.5f / m_TextureSize;		float t = 0.5f / m_TextureSize;
m_TextureMatrix.SetZero();		m_TextureMatrix.SetZero();
m_TextureMatrix._11 = s;		m_TextureMatrix._11 = s;
m_TextureMatrix._23 = s;		m_TextureMatrix._23 = s;
m_TextureMatrix._14 = t;		m_TextureMatrix._14 = t;
m_TextureMatrix._24 = t;		m_TextureMatrix._24 = t;
m_TextureMatrix._44 = 1;		m_TextureMatrix._44 = 1;
}		}
Show All 9 Lines	void CLOSTexture::ConstructTexture(int unit)
}		}
}		}

void CLOSTexture::RecomputeTexture(int unit)		void CLOSTexture::RecomputeTexture(int unit)
{		{
// If the map was resized, delete and regenerate the texture		// If the map was resized, delete and regenerate the texture
if (m_Texture)		if (m_Texture)
{		{
CmpPtr<ICmpTerrain> cmpTerrain(m_Simulation, SYSTEM_ENTITY);		CmpPtr<ICmpRangeManager> cmpRangeManager(m_Simulation, SYSTEM_ENTITY);
if (cmpTerrain && m_MapSize != (ssize_t)cmpTerrain->GetVerticesPerSide())		if (!cmpRangeManager \|\| m_MapSize != cmpRangeManager->GetVerticesPerSide())
DeleteTexture();		DeleteTexture();
}		}

bool recreated = false;		bool recreated = false;
if (!m_Texture)		if (!m_Texture)
{		{
ConstructTexture(unit);		ConstructTexture(unit);
recreated = true;		recreated = true;
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