BoundingVolume.h

/* 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_BOUNDING_VOLUME_H
#define HPL_BOUNDING_VOLUME_H
 
#include "hpl1/engine/graphics/GraphicsTypes.h"
#include "hpl1/engine/math/MathTypes.h"
#include "hpl1/engine/system/SerializeClass.h"
#include "hpl1/engine/system/SystemTypes.h"
 
namespace hpl {
 
class iLowLevelGraphics;
class cBoundingVolume;
 
class cBVTempArray {
public:
    const float *mpArray;
    int mlSize;
};
 
enum eBVCollision {
    eBVCollision_Inside,
    eBVCollision_Outside,
    eBVCollision_Intersect,
    eBVCollision_LastEnum
};
 
typedef Common::List<cBVTempArray> tBVTempArrayList;
typedef tBVTempArrayList::iterator tBVTempArrayListIt;
 
class cShadowVolumeBV {
public:
    cPlanef mvPlanes[12];
    int mlPlaneCount;
    tVector3fVec mvPoints;
    int mlCapPlanes;
 
    bool CollideBoundingVolume(cBoundingVolume *aBV);
 
private:
    bool CollideBVSphere(cBoundingVolume *aBV);
    bool CollideBVAABB(cBoundingVolume *aBV);
};
 
class cBoundingVolume : public iSerializable {
    friend class cMath;
    kSerializableClassInit(cBoundingVolume) public : cBoundingVolume();
 
    cVector3f GetMax();
    cVector3f GetMin();
 
    cVector3f GetLocalMax();
    cVector3f GetLocalMin();
 
    void SetLocalMinMax(const cVector3f &mvMin, const cVector3f &mvMax);
 
    void SetPosition(const cVector3f &avPos);
    cVector3f GetPosition();
 
    void SetSize(const cVector3f &avSize);
    cVector3f GetSize();
 
    void SetTransform(const cMatrixf &a_mtxTransform);
    const cMatrixf &GetTransform();
 
    cVector3f GetLocalCenter();
    cVector3f GetWorldCenter();
 
    float GetRadius();
 
    void AddArrayPoints(const float *apArray, int alNumOfVectors);
    void CreateFromPoints(int alStride);
 
    cShadowVolumeBV *GetShadowVolume(const cVector3f &avLightPos, float afLightRange, bool abForceUpdate);
 
    // Debug:
    void DrawEdges(const cVector3f &avLightPos, float afLightRange, iLowLevelGraphics *apLowLevelGraphics);
    void UpdateSize();
 
    cMatrixf m_mtxTransform;
 
    cVector3f mvLocalMax;
    cVector3f mvLocalMin;
 
    cVector3f mvMax;
    cVector3f mvMin;
 
    cVector3f mvPivot;
 
    cVector3f mvWorldMax;
    cVector3f mvWorldMin;
 
    cVector3f mvPosition;
    cVector3f mvSize;
    float mfRadius;
 
private:
    bool mbPositionUpdated;
    bool mbSizeUpdated;
 
    tBVTempArrayList mlstArrays;
 
    cShadowVolumeBV mShadowVolume;
    bool mbShadowPlanesNeedUpdate;
};
 
} // namespace hpl
 
#endif // HPL_BOUNDING_VOLUME_H