Move BulletShapeManager and BulletShape to resource/
scrawl
9 years ago
parent
eb2f16d682
commit
8cf57ef6ac
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#include "bulletshape.hpp"
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#include <stdexcept>
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#include <BulletCollision/CollisionShapes/btBoxShape.h>
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#include <BulletCollision/CollisionShapes/btTriangleMesh.h>
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#include <BulletCollision/CollisionShapes/btScaledBvhTriangleMeshShape.h>
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#include <BulletCollision/CollisionShapes/btCompoundShape.h>
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namespace Resource
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{
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BulletShape::BulletShape()
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: mCollisionShape(NULL)
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{
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}
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BulletShape::~BulletShape()
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{
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deleteShape(mCollisionShape);
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}
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void BulletShape::deleteShape(btCollisionShape* shape)
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{
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if(shape!=NULL)
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{
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if(shape->isCompound())
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{
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btCompoundShape* ms = static_cast<btCompoundShape*>(shape);
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int a = ms->getNumChildShapes();
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for(int i=0; i <a;i++)
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deleteShape(ms->getChildShape(i));
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}
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delete shape;
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}
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}
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btCollisionShape* BulletShape::duplicateCollisionShape(btCollisionShape *shape) const
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{
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if(shape->isCompound())
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{
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btCompoundShape *comp = static_cast<btCompoundShape*>(shape);
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btCompoundShape *newShape = new btCompoundShape;
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int numShapes = comp->getNumChildShapes();
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for(int i = 0;i < numShapes;++i)
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{
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btCollisionShape *child = duplicateCollisionShape(comp->getChildShape(i));
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btTransform trans = comp->getChildTransform(i);
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newShape->addChildShape(trans, child);
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}
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return newShape;
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}
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if(btBvhTriangleMeshShape* trishape = dynamic_cast<btBvhTriangleMeshShape*>(shape))
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{
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#if BT_BULLET_VERSION >= 283
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btScaledBvhTriangleMeshShape* newShape = new btScaledBvhTriangleMeshShape(trishape, btVector3(1.f, 1.f, 1.f));
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#else
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// work around btScaledBvhTriangleMeshShape bug ( https://code.google.com/p/bullet/issues/detail?id=371 ) in older bullet versions
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btTriangleMesh* oldMesh = static_cast<btTriangleMesh*>(trishape->getMeshInterface());
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btTriangleMesh* newMesh = new btTriangleMesh(*oldMesh);
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TriangleMeshShape* newShape = new TriangleMeshShape(newMesh, true);
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#endif
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return newShape;
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}
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if (btBoxShape* boxshape = dynamic_cast<btBoxShape*>(shape))
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{
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return new btBoxShape(*boxshape);
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}
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throw std::logic_error(std::string("Unhandled Bullet shape duplication: ")+shape->getName());
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}
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btCollisionShape *BulletShape::getCollisionShape()
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{
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return mCollisionShape;
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}
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osg::ref_ptr<BulletShapeInstance> BulletShape::makeInstance()
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{
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osg::ref_ptr<BulletShapeInstance> instance (new BulletShapeInstance(this));
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return instance;
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}
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BulletShapeInstance::BulletShapeInstance(osg::ref_ptr<BulletShape> source)
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: BulletShape()
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, mSource(source)
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{
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mCollisionBoxHalfExtents = source->mCollisionBoxHalfExtents;
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mCollisionBoxTranslate = source->mCollisionBoxTranslate;
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mAnimatedShapes = source->mAnimatedShapes;
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if (source->mCollisionShape)
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mCollisionShape = duplicateCollisionShape(source->mCollisionShape);
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}
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}
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@ -0,0 +1,78 @@
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#ifndef OPENMW_COMPONENTS_RESOURCE_BULLETSHAPE_H
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#define OPENMW_COMPONENTS_RESOURCE_BULLETSHAPE_H
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#include <map>
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#include <osg/Referenced>
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#include <osg/ref_ptr>
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#include <osg/Vec3f>
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#include <BulletCollision/CollisionShapes/btBvhTriangleMeshShape.h>
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class btCollisionShape;
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namespace Resource
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{
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class BulletShapeInstance;
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class BulletShape : public osg::Referenced
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{
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public:
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BulletShape();
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virtual ~BulletShape();
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btCollisionShape* mCollisionShape;
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// Used for actors. Note, ideally actors would use a separate loader - as it is
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// we have to keep a redundant copy of the actor model around in mCollisionShape, which isn't used.
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// For now, use one file <-> one resource for simplicity.
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osg::Vec3f mCollisionBoxHalfExtents;
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osg::Vec3f mCollisionBoxTranslate;
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// Stores animated collision shapes. If any collision nodes in the NIF are animated, then mCollisionShape
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// will be a btCompoundShape (which consists of one or more child shapes).
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// In this map, for each animated collision shape,
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// we store the node's record index mapped to the child index of the shape in the btCompoundShape.
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std::map<int, int> mAnimatedShapes;
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osg::ref_ptr<BulletShapeInstance> makeInstance();
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btCollisionShape* duplicateCollisionShape(btCollisionShape* shape) const;
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btCollisionShape* getCollisionShape();
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private:
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void deleteShape(btCollisionShape* shape);
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};
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// An instance of a BulletShape that may have its own unique scaling set on the mCollisionShape.
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// Vertex data is shallow-copied where possible. A ref_ptr to the original shape is held to keep vertex pointers intact.
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class BulletShapeInstance : public BulletShape
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{
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public:
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BulletShapeInstance(osg::ref_ptr<BulletShape> source);
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private:
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osg::ref_ptr<BulletShape> mSource;
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};
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// Subclass btBhvTriangleMeshShape to auto-delete the meshInterface
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struct TriangleMeshShape : public btBvhTriangleMeshShape
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{
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TriangleMeshShape(btStridingMeshInterface* meshInterface, bool useQuantizedAabbCompression)
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: btBvhTriangleMeshShape(meshInterface, useQuantizedAabbCompression)
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{
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}
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virtual ~TriangleMeshShape()
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{
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delete getTriangleInfoMap();
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delete m_meshInterface;
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}
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};
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}
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#endif
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