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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#ifndef _CAMERA_H
#define _CAMERA_H
#include "Rendering/GL/myGL.h"
#include "System/float3.h"
#include "System/Matrix44f.h"
class CCamera
{
public:
CCamera();
float3 CalcPixelDir(int x,int y) const;
float3 CalcWindowCoordinates(const float3& objPos) const;
void CopyState(const CCamera*);
void UpdateForward();
bool InView(const float3& p, float radius = 0) const;
bool InView(const float3& mins, const float3& maxs) const;
void Update(bool resetUp = true);
void GetFrustumSides(float miny, float maxy, float scale, bool negSide = false);
void GetFrustumSide(
const float3& zdir,
const float3& offset,
float miny,
float maxy,
float scale,
bool upwardDir,
bool negSide);
void ClearFrustumSides() {
posFrustumSides.clear();
negFrustumSides.clear();
}
void ClipFrustumLines(bool left, const float zmin, const float zmax);
const CMatrix44f& GetViewMatrix() const { return viewMatrix; }
const CMatrix44f& GetViewMatrixInverse() const { return viewMatrixInverse; }
const CMatrix44f& GetProjectionMatrix() const { return projectionMatrix; }
const CMatrix44f& GetProjectionMatrixInverse() const { return projectionMatrixInverse; }
const CMatrix44f& GetViewProjectionMatrix() const { return viewProjectionMatrix; }
const CMatrix44f& GetViewProjectionMatrixInverse() const { return viewProjectionMatrixInverse; }
const CMatrix44f& GetBillBoardMatrix() const { return billboardMatrix; }
float GetFov() const { return fov; }
float GetHalfFov() const { return halfFov; }
float GetTanHalfFov() const { return tanHalfFov; }
float GetLPPScale() const { return lppScale; }
/// @param fov in degree
void SetFov(float fov);
float3 pos;
float3 rot; ///< warning is not always updated
float3 forward; ///< local z-axis
float3 right; ///< local x-axis
float3 up; ///< local y-axis
float3 topFrustumSideDir;
float3 botFrustumSideDir;
float3 rgtFrustumSideDir;
float3 lftFrustumSideDir;
// Lua-controlled parameters, camera-only (not cam2)
float3 posOffset;
float3 tiltOffset;
GLint viewport[4];
struct FrustumLine {
float base;
float dir;
int sign;
float minz;
float maxz;
};
std::vector<FrustumLine> posFrustumSides;
std::vector<FrustumLine> negFrustumSides;
private:
void ComputeViewRange();
void myGluPerspective(float aspect, float zNear, float zFar);
void myGluLookAt(const float3&, const float3&, const float3&);
private:
CMatrix44f projectionMatrix;
CMatrix44f projectionMatrixInverse;
CMatrix44f viewMatrix;
CMatrix44f viewMatrixInverse;
CMatrix44f viewProjectionMatrix;
CMatrix44f viewProjectionMatrixInverse;
CMatrix44f billboardMatrix;
std::vector<GLdouble> viewMatrixD;
std::vector<GLdouble> projectionMatrixD;
float fov; ///< in degrees
float halfFov; ///< half the fov in radians
float tanHalfFov; ///< tan(halfFov)
float lppScale; ///< length-per-pixel scale
};
extern CCamera* camera;
extern CCamera* cam2;
#endif // _CAMERA_H
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