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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
/*
* Copyright (C) 2006-2010 - Frictional Games
*
* This file is part of HPL1 Engine.
*/
#ifndef HPL_FRUSTUM_H
#define HPL_FRUSTUM_H
#include "hpl1/engine/graphics/GraphicsTypes.h"
#include "hpl1/engine/math/BoundingVolume.h"
#include "hpl1/engine/math/MathTypes.h"
#include "hpl1/engine/system/SystemTypes.h"
namespace hpl {
class iLowLevelGraphics;
enum eFrustumPlane {
eFrustumPlane_Left = 0,
eFrustumPlane_Right = 1,
eFrustumPlane_Bottom = 2,
eFrustumPlane_Top = 3,
eFrustumPlane_Near = 4,
eFrustumPlane_Far = 5,
eFrustumPlane_LastEnum = 7,
};
enum eFrustumCollision {
eFrustumCollision_Inside,
eFrustumCollision_Outside,
eFrustumCollision_Intersect,
eFrustumCollision_LastEnum
};
class cFrustum {
public:
cFrustum();
void SetViewProjMatrix(const cMatrixf &a_mtxProj, const cMatrixf &a_mtxView,
float afFarPlane, float afNearPlane, float afFOV, float afAspect,
const cVector3f &avOrigin, bool abInfFarPlane = false);
cPlanef GetPlane(eFrustumPlane aType);
eFrustumCollision CollideBoundingVolume(cBoundingVolume *aBV);
eFrustumCollision CollideFustrumSphere(cBoundingVolume *aBV);
eFrustumCollision CollideBVSphere(cBoundingVolume *aBV);
eFrustumCollision CollideBVAABB(cBoundingVolume *aBV);
/**
* Checks intersection with a line
*/
bool CheckLineIntersection(const cVector3f &avPoint1, const cVector3f &avPoint2);
/**
* Checks intersection with a quad mesh.
* \param apPoints the points of the quad mesh, every 4 points is a face.
*/
bool CheckQuadMeshIntersection(tVector3fVec *apPoints);
bool CheckVolumeIntersection(cShadowVolumeBV *apVolume);
cSpheref GetBoundingSphere() { return mBoundingSphere; }
const cBoundingVolume &GetBoundingVolume() { return mBoundingVolume; }
const cVector3f &GetOrigin();
cBoundingVolume *GetOriginBV();
cVector3f GetForward();
void Draw(iLowLevelGraphics *apLowLevelGraphics);
private:
void UpdatePlanes();
void UpdateSphere();
void UpdateEndPoints();
void UpdateBV();
float mfFarPlane;
float mfNearPlane;
float mfAspect;
float mfFOV;
bool mbInfFarPlane;
cVector3f mvOrigin;
cBoundingVolume mOriginBV;
cMatrixf m_mtxViewProj;
cMatrixf m_mtxModelView;
cPlanef mPlane[6];
cSpheref mBoundingSphere;
cBoundingVolume mBoundingVolume;
cVector3f mvEndPoints[4];
tVector3fVec mvPoints;
};
} // namespace hpl
#endif // HPL_FRUSTUM_H
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