/*
* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
* its licensors.
*
* For complete copyright and license terms please see the LICENSE at the root of this
* distribution (the "License"). All use of this software is governed by the License,
* or, if provided, by the license below or the license accompanying this file. Do not
* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*
*/
// Original file Copyright Crytek GMBH or its affiliates, used under license.

#ifndef CRYINCLUDE_CRYPHYSICS_HEIGHTFIELDBV_H
#define CRYINCLUDE_CRYPHYSICS_HEIGHTFIELDBV_H
#pragma once

#if ENABLE_CRY_PHYSICS

class CHeightfieldBV
    : public CBVTree
{
public:
    CHeightfieldBV() { m_pUsedTriMap = 0; m_minHeight = 0.f; m_maxHeight = 0.f; }
    virtual ~CHeightfieldBV()
    {
        if (m_pUsedTriMap)
        {
            delete[] m_pUsedTriMap;
        }
    }
    virtual int GetType() { return BVT_HEIGHTFIELD; }

    virtual float Build(CGeometry* pGeom);
    void SetHeightfield(heightfield* phf);
    virtual void GetBBox(box* pbox);
    virtual int MaxPrimsInNode() { return m_PatchSize.x * m_PatchSize.y * 2; }
    virtual void GetNodeBV(BV*& pBV, int iNode = 0, int iCaller = 0);
    virtual void GetNodeBV(BV*& pBV, const Vec3& sweepdir, float sweepstep, int iNode = 0, int iCaller = 0) {}
    virtual void GetNodeBV(const Matrix33& Rw, const Vec3& offsw, float scalew, BV*& pBV, int iNode = 0, int iCaller = 0);
    virtual void GetNodeBV(const Matrix33& Rw, const Vec3& offsw, float scalew, BV*& pBV, const Vec3& sweepdir, float sweepstep, int iNode = 0, int iCaller = 0) {}
    virtual int GetNodeContents(int iNode, BV* pBVCollider, int bColliderUsed, int bColliderLocal,
        geometry_under_test* pGTest, geometry_under_test* pGTestOp);
    virtual void MarkUsedTriangle(int itri, geometry_under_test* pGTest);

    CTriMesh* m_pMesh;
    heightfield* m_phf;
    vector2di m_PatchStart;
    vector2di m_PatchSize;
    float m_minHeight, m_maxHeight;
    unsigned int* m_pUsedTriMap;
};

struct InitHeightfieldGlobals
{
    InitHeightfieldGlobals();
};

void project_box_on_grid(box* pbox, grid* pgrid, geometry_under_test* pGTest, int& ix, int& iy, int& sx, int& sy, float& minz);

#endif // ENABLE_CRY_PHYSICS

#endif // CRYINCLUDE_CRYPHYSICS_HEIGHTFIELDBV_H