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Diffstat (limited to 'extern/bullet2/BulletCollision/CollisionShapes/btCapsuleShape.h')
| -rw-r--r-- | extern/bullet2/BulletCollision/CollisionShapes/btCapsuleShape.h | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/extern/bullet2/BulletCollision/CollisionShapes/btCapsuleShape.h b/extern/bullet2/BulletCollision/CollisionShapes/btCapsuleShape.h new file mode 100644 index 00000000000..ab763abf808 --- /dev/null +++ b/extern/bullet2/BulletCollision/CollisionShapes/btCapsuleShape.h @@ -0,0 +1,173 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2009 Erwin Coumans http://bulletphysics.org + +This software is provided 'as-is', without any express or implied warranty. +In no event will the authors be held liable for any damages arising from the use of this software. +Permission is granted to anyone to use this software for any purpose, +including commercial applications, and to alter it and redistribute it freely, +subject to the following restrictions: + +1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required. +2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. +3. This notice may not be removed or altered from any source distribution. +*/ + +#ifndef BT_CAPSULE_SHAPE_H +#define BT_CAPSULE_SHAPE_H + +#include "btConvexInternalShape.h" +#include "BulletCollision/BroadphaseCollision/btBroadphaseProxy.h" // for the types + + +///The btCapsuleShape represents a capsule around the Y axis, there is also the btCapsuleShapeX aligned around the X axis and btCapsuleShapeZ around the Z axis. +///The total height is height+2*radius, so the height is just the height between the center of each 'sphere' of the capsule caps. +///The btCapsuleShape is a convex hull of two spheres. The btMultiSphereShape is a more general collision shape that takes the convex hull of multiple sphere, so it can also represent a capsule when just using two spheres. +class btCapsuleShape : public btConvexInternalShape +{ +protected: + int m_upAxis; + +protected: + ///only used for btCapsuleShapeZ and btCapsuleShapeX subclasses. + btCapsuleShape() : btConvexInternalShape() {m_shapeType = CAPSULE_SHAPE_PROXYTYPE;}; + +public: + btCapsuleShape(btScalar radius,btScalar height); + + ///CollisionShape Interface + virtual void calculateLocalInertia(btScalar mass,btVector3& inertia) const; + + /// btConvexShape Interface + virtual btVector3 localGetSupportingVertexWithoutMargin(const btVector3& vec)const; + + virtual void batchedUnitVectorGetSupportingVertexWithoutMargin(const btVector3* vectors,btVector3* supportVerticesOut,int numVectors) const; + + virtual void setMargin(btScalar collisionMargin) + { + //correct the m_implicitShapeDimensions for the margin + btVector3 oldMargin(getMargin(),getMargin(),getMargin()); + btVector3 implicitShapeDimensionsWithMargin = m_implicitShapeDimensions+oldMargin; + + btConvexInternalShape::setMargin(collisionMargin); + btVector3 newMargin(getMargin(),getMargin(),getMargin()); + m_implicitShapeDimensions = implicitShapeDimensionsWithMargin - newMargin; + + } + + virtual void getAabb (const btTransform& t, btVector3& aabbMin, btVector3& aabbMax) const + { + btVector3 halfExtents(getRadius(),getRadius(),getRadius()); + halfExtents[m_upAxis] = getRadius() + getHalfHeight(); + halfExtents += btVector3(getMargin(),getMargin(),getMargin()); + btMatrix3x3 abs_b = t.getBasis().absolute(); + btVector3 center = t.getOrigin(); + btVector3 extent = btVector3(abs_b[0].dot(halfExtents),abs_b[1].dot(halfExtents),abs_b[2].dot(halfExtents)); + + aabbMin = center - extent; + aabbMax = center + extent; + } + + virtual const char* getName()const + { + return "CapsuleShape"; + } + + int getUpAxis() const + { + return m_upAxis; + } + + btScalar getRadius() const + { + int radiusAxis = (m_upAxis+2)%3; + return m_implicitShapeDimensions[radiusAxis]; + } + + btScalar getHalfHeight() const + { + return m_implicitShapeDimensions[m_upAxis]; + } + + virtual void setLocalScaling(const btVector3& scaling) + { + btVector3 oldMargin(getMargin(),getMargin(),getMargin()); + btVector3 implicitShapeDimensionsWithMargin = m_implicitShapeDimensions+oldMargin; + btVector3 unScaledImplicitShapeDimensionsWithMargin = implicitShapeDimensionsWithMargin / m_localScaling; + + btConvexInternalShape::setLocalScaling(scaling); + + m_implicitShapeDimensions = (unScaledImplicitShapeDimensionsWithMargin * m_localScaling) - oldMargin; + + } + + virtual int calculateSerializeBufferSize() const; + + ///fills the dataBuffer and returns the struct name (and 0 on failure) + virtual const char* serialize(void* dataBuffer, btSerializer* serializer) const; + + +}; + +///btCapsuleShapeX represents a capsule around the Z axis +///the total height is height+2*radius, so the height is just the height between the center of each 'sphere' of the capsule caps. +class btCapsuleShapeX : public btCapsuleShape +{ +public: + + btCapsuleShapeX(btScalar radius,btScalar height); + + //debugging + virtual const char* getName()const + { + return "CapsuleX"; + } + + + +}; + +///btCapsuleShapeZ represents a capsule around the Z axis +///the total height is height+2*radius, so the height is just the height between the center of each 'sphere' of the capsule caps. +class btCapsuleShapeZ : public btCapsuleShape +{ +public: + btCapsuleShapeZ(btScalar radius,btScalar height); + + //debugging + virtual const char* getName()const + { + return "CapsuleZ"; + } + + +}; + +///do not change those serialization structures, it requires an updated sBulletDNAstr/sBulletDNAstr64 +struct btCapsuleShapeData +{ + btConvexInternalShapeData m_convexInternalShapeData; + + int m_upAxis; + + char m_padding[4]; +}; + +SIMD_FORCE_INLINE int btCapsuleShape::calculateSerializeBufferSize() const +{ + return sizeof(btCapsuleShapeData); +} + + ///fills the dataBuffer and returns the struct name (and 0 on failure) +SIMD_FORCE_INLINE const char* btCapsuleShape::serialize(void* dataBuffer, btSerializer* serializer) const +{ + btCapsuleShapeData* shapeData = (btCapsuleShapeData*) dataBuffer; + + btConvexInternalShape::serialize(&shapeData->m_convexInternalShapeData,serializer); + + shapeData->m_upAxis = m_upAxis; + + return "btCapsuleShapeData"; +} + +#endif //BT_CAPSULE_SHAPE_H |