axmol/cocos/physics3d/CCPhysics3DShape.cpp

/****************************************************************************
 Copyright (c) 2015-2016 Chukong Technologies Inc.
 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
 
 http://www.cocos2d-x.org
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
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 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.
 
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#include "physics3d/CCPhysics3D.h"

#if CC_USE_3D_PHYSICS

#if (CC_ENABLE_BULLET_INTEGRATION)
#include "bullet/BulletCollision/CollisionShapes/btHeightfieldTerrainShape.h"

NS_CC_BEGIN

Physics3DShape::ShapeType Physics3DShape::getShapeType() const
{
    return _shapeType;
}

Physics3DShape::Physics3DShape()
: _shapeType(ShapeType::UNKNOWN)
{
#if (CC_ENABLE_BULLET_INTEGRATION)
    _btShape = nullptr;
    _heightfieldData = nullptr;
#endif
}
Physics3DShape::~Physics3DShape()
{
#if (CC_ENABLE_BULLET_INTEGRATION)
    CC_SAFE_DELETE(_btShape);
    CC_SAFE_DELETE_ARRAY(_heightfieldData);
    for (auto iter : _compoundChildShapes){
        CC_SAFE_RELEASE(iter);
    }
    _compoundChildShapes.clear();
#endif
}

Physics3DShape* Physics3DShape::createBox(const cocos2d::Vec3& extent)
{
    auto shape = new Physics3DShape();
    shape->initBox(extent);
    shape->autorelease();
    return shape;
}

Physics3DShape* Physics3DShape::createSphere(float radius)
{
    auto shape = new Physics3DShape();
    shape->initSphere(radius);
    shape->autorelease();
    return shape;
}

Physics3DShape* Physics3DShape::createCylinder(float radius, float height)
{
    auto shape = new Physics3DShape();
    shape->initCylinder(radius, height);
    shape->autorelease();
    return shape;
}

Physics3DShape* Physics3DShape::createCapsule(float radius, float height)
{
    auto shape = new Physics3DShape();
    shape->initCapsule(radius, height);
    shape->autorelease();
    return shape;
}

Physics3DShape* Physics3DShape::createConvexHull( const cocos2d::Vec3 *points, int numPoints )
{
    auto shape = new Physics3DShape();
    shape->initConvexHull(points, numPoints);
    shape->autorelease();
    return shape;
}

Physics3DShape* Physics3DShape::createMesh( const cocos2d::Vec3 *triangles, int numTriangles )
{
    auto shape = new Physics3DShape();
    shape->initMesh(triangles, numTriangles);
    shape->autorelease();
    return shape;
}

Physics3DShape* Physics3DShape::createHeightfield( int heightStickWidth,int heightStickLength
                                                  , const void* heightfieldData, float heightScale
                                                  , float minHeight, float maxHeight
                                                  , bool useFloatDatam, bool flipQuadEdges
                                                  , bool useDiamondSubdivision)
{
    auto shape = new Physics3DShape();
    shape->initHeightfield(heightStickWidth, heightStickLength, heightfieldData, heightScale, minHeight, maxHeight, useFloatDatam, flipQuadEdges, useDiamondSubdivision);
    shape->autorelease();
    return shape;	
}

Physics3DShape* Physics3DShape::createCompoundShape( const std::vector<std::pair<Physics3DShape *, Mat4>> &shapes )
{
    auto shape = new Physics3DShape();
    shape->initCompoundShape(shapes);
    shape->autorelease();
    return shape;
}

bool Physics3DShape::initBox(const cocos2d::Vec3& ext)
{
    _shapeType = ShapeType::BOX;
    _btShape = new btBoxShape(convertVec3TobtVector3(ext * 0.5f));
    return true;
}
bool Physics3DShape::initSphere(float radius)
{
    _shapeType = ShapeType::SPHERE;
    _btShape = new btSphereShape(radius);
    return true;
}
bool Physics3DShape::initCylinder(float radius, float height)
{
    _shapeType = ShapeType::CYLINDER;
    _btShape = new btCylinderShape(convertVec3TobtVector3(cocos2d::Vec3(radius, height, radius) * 0.5f));
    return true;
}
bool Physics3DShape::initCapsule(float radius, float height)
{
    _shapeType = ShapeType::CAPSULE;
    _btShape = new btCapsuleShape(radius, height);
    return true;
}

bool Physics3DShape::initConvexHull( const cocos2d::Vec3 *points, int numPoints )
{
    _shapeType = ShapeType::CONVEX;
    _btShape = new btConvexHullShape((btScalar *)points, numPoints, sizeof(cocos2d::Vec3));
    return true;
}

bool Physics3DShape::initMesh( const cocos2d::Vec3 *triangles, int numTriangles )
{
    _shapeType = ShapeType::MESH;
    auto mesh = new btTriangleMesh(false);
    for (int i = 0; i < numTriangles * 3; i += 3){
        mesh->addTriangle(convertVec3TobtVector3(triangles[i]), convertVec3TobtVector3(triangles[i + 1]), convertVec3TobtVector3(triangles[i + 2]));
    }
    _btShape = new btBvhTriangleMeshShape(mesh, true);
    return true;
}

bool Physics3DShape::initHeightfield( int heightStickWidth,int heightStickLength 
                                     , const void* heightfieldData, float heightScale 
                                     , float minHeight, float maxHeight 
                                     , bool useFloatDatam, bool flipQuadEdges
                                     , bool useDiamondSubdivision)
{
    _shapeType = ShapeType::HEIGHT_FIELD;
    PHY_ScalarType type = PHY_UCHAR;
    unsigned int dataSizeInByte = heightStickWidth * heightStickLength;
    if (useFloatDatam){
        type = PHY_FLOAT;
        dataSizeInByte *= sizeof(float);
    }
    _heightfieldData = new unsigned char[dataSizeInByte];
    memcpy(_heightfieldData, heightfieldData, dataSizeInByte);
    auto heightfield = new btHeightfieldTerrainShape(heightStickWidth, heightStickLength, _heightfieldData, heightScale, minHeight, maxHeight, 1, type, flipQuadEdges);
    heightfield->setUseDiamondSubdivision(useDiamondSubdivision);
    _btShape = heightfield;
    return true;
}

bool Physics3DShape::initCompoundShape( const std::vector<std::pair<Physics3DShape *, Mat4>> &shapes )
{
    _shapeType = ShapeType::COMPOUND;
    auto compound = new btCompoundShape;
    for (auto iter : shapes){
        compound->addChildShape(convertMat4TobtTransform(iter.second), iter.first->getbtShape());
        CC_SAFE_RETAIN(iter.first);
        _compoundChildShapes.push_back(iter.first);
    }
    _btShape = compound;
    return true;
}

NS_CC_END

#endif // CC_ENABLE_BULLET_INTEGRATION

#endif // CC_USE_3D_PHYSICS