Differential D2020 Diff 9113 ps/trunk/source/graphics/Camera.h

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ps/trunk/source/graphics/Camera.h

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	#ifndef INCLUDED_CAMERA			#ifndef INCLUDED_CAMERA
	#define INCLUDED_CAMERA			#define INCLUDED_CAMERA

	#include "graphics/Frustum.h"			#include "graphics/Frustum.h"
	#include "maths/BoundingBoxAligned.h"			#include "maths/BoundingBoxAligned.h"
	#include "maths/Matrix3D.h"			#include "maths/Matrix3D.h"

				#include <array>

	// view port			// view port
	struct SViewPort			struct SViewPort
	{			{
	int m_X;			int m_X;
	int m_Y;			int m_Y;
	int m_Width;			int m_Width;
	int m_Height;			int m_Height;
	};			};

	class CCamera			class CCamera
	{			{
	public:			public:
				// Represents camera viewport or frustum side in 3D space.
				using Quad = std::array<CVector3D, 4>;

	CCamera();			CCamera();
	~CCamera();			~CCamera();

	CMatrix3D& GetProjection() { return m_ProjMat; }			CMatrix3D& GetProjection() { return m_ProjMat; }
	const CMatrix3D& GetProjection() const { return m_ProjMat; }			const CMatrix3D& GetProjection() const { return m_ProjMat; }
	CMatrix3D GetViewProjection() const { return m_ProjMat * m_Orientation.GetInverse(); }			CMatrix3D GetViewProjection() const { return m_ProjMat * m_Orientation.GetInverse(); }
	void SetProjection(const CMatrix3D& matrix) { m_ProjMat = matrix; }			void SetProjection(const CMatrix3D& matrix) { m_ProjMat = matrix; }
	void SetPerspectiveProjection(float nearp, float farp, float fov);			void SetPerspectiveProjection(float nearp, float farp, float fov);
	void SetPerspectiveProjectionTile(int tiles, int tile_x, int tile_y);			void SetPerspectiveProjectionTile(int tiles, int tile_x, int tile_y);

	CMatrix3D& GetOrientation() { return m_Orientation; }			CMatrix3D& GetOrientation() { return m_Orientation; }
	const CMatrix3D& GetOrientation() const { return m_Orientation; }			const CMatrix3D& GetOrientation() const { return m_Orientation; }

	// Updates the frustum planes. Should be called			// Updates the frustum planes. Should be called
	// everytime the view or projection matrices are			// everytime the view or projection matrices are
	// altered.			// altered.
	void UpdateFrustum(const CBoundingBoxAligned& scissor = CBoundingBoxAligned(CVector3D(-1.0f, -1.0f, -1.0f), CVector3D(1.0f, 1.0f, 1.0f)));			void UpdateFrustum(const CBoundingBoxAligned& scissor = CBoundingBoxAligned(CVector3D(-1.0f, -1.0f, -1.0f), CVector3D(1.0f, 1.0f, 1.0f)));
	void ClipFrustum(const CPlane& clipPlane);			void ClipFrustum(const CPlane& clipPlane);
	const CFrustum& GetFrustum() const { return m_ViewFrustum; }			const CFrustum& GetFrustum() const { return m_ViewFrustum; }

	void SetViewPort(const SViewPort& viewport);			void SetViewPort(const SViewPort& viewport);
	const SViewPort& GetViewPort() const { return m_ViewPort; }			const SViewPort& GetViewPort() const { return m_ViewPort; }
				float GetAspectRatio() const;

	float GetNearPlane() const { return m_NearPlane; }			float GetNearPlane() const { return m_NearPlane; }
	float GetFarPlane() const { return m_FarPlane; }			float GetFarPlane() const { return m_FarPlane; }
	float GetFOV() const { return m_FOV; }			float GetFOV() const { return m_FOV; }

	// Returns four points in camera space at given distance from camera			// Returns a quad of view in camera space at given distance from camera.
	void GetCameraPlanePoints(float dist, CVector3D pts[4]) const;			void GetViewQuad(float dist, Quad& quad) const;

	// Build a ray passing through the screen coordinate (px, py) and the camera			// Build a ray passing through the screen coordinate (px, py) and the camera
	/////////////////////////////////////////////////////////////////////////////////////////			/////////////////////////////////////////////////////////////////////////////////////////
	// BuildCameraRay: calculate origin and ray direction of a ray through			// BuildCameraRay: calculate origin and ray direction of a ray through
	// the pixel (px,py) on the screen			// the pixel (px,py) on the screen
	void BuildCameraRay(int px, int py, CVector3D& origin, CVector3D& dir) const;			void BuildCameraRay(int px, int py, CVector3D& origin, CVector3D& dir) const;

	// General helpers that seem to fit here			// General helpers that seem to fit here
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