1 files changed, 107 insertions, 0 deletions
diff --git a/thirdparty/bullet/BulletCollision/CollisionShapes/btStaticPlaneShape.cpp b/thirdparty/bullet/BulletCollision/CollisionShapes/btStaticPlaneShape.cpp
new file mode 100644
index 0000000000..d17141e3f2
--- /dev/null
+++ b/thirdparty/bullet/BulletCollision/CollisionShapes/btStaticPlaneShape.cpp
@@ -0,0 +1,107 @@
+/*
+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.
+*/
+
+#include "btStaticPlaneShape.h"
+
+#include "LinearMath/btTransformUtil.h"
+
+
+btStaticPlaneShape::btStaticPlaneShape(const btVector3& planeNormal,btScalar planeConstant)
+: btConcaveShape (), m_planeNormal(planeNormal.normalized()),
+m_planeConstant(planeConstant),
+m_localScaling(btScalar(1.),btScalar(1.),btScalar(1.))
+{
+	m_shapeType = STATIC_PLANE_PROXYTYPE;
+	//	btAssert( btFuzzyZero(m_planeNormal.length() - btScalar(1.)) );
+}
+
+
+btStaticPlaneShape::~btStaticPlaneShape()
+{
+}
+
+
+
+void btStaticPlaneShape::getAabb(const btTransform& t,btVector3& aabbMin,btVector3& aabbMax) const
+{
+	(void)t;
+	/*
+	btVector3 infvec (btScalar(BT_LARGE_FLOAT),btScalar(BT_LARGE_FLOAT),btScalar(BT_LARGE_FLOAT));
+
+	btVector3 center = m_planeNormal*m_planeConstant;
+	aabbMin = center + infvec*m_planeNormal;
+	aabbMax = aabbMin;
+	aabbMin.setMin(center - infvec*m_planeNormal);
+	aabbMax.setMax(center - infvec*m_planeNormal); 
+	*/
+
+	aabbMin.setValue(btScalar(-BT_LARGE_FLOAT),btScalar(-BT_LARGE_FLOAT),btScalar(-BT_LARGE_FLOAT));
+	aabbMax.setValue(btScalar(BT_LARGE_FLOAT),btScalar(BT_LARGE_FLOAT),btScalar(BT_LARGE_FLOAT));
+
+}
+
+
+
+
+void	btStaticPlaneShape::processAllTriangles(btTriangleCallback* callback,const btVector3& aabbMin,const btVector3& aabbMax) const
+{
+
+	btVector3 halfExtents = (aabbMax - aabbMin) * btScalar(0.5);
+	btScalar radius = halfExtents.length();
+	btVector3 center = (aabbMax + aabbMin) * btScalar(0.5);
+	
+	//this is where the triangles are generated, given AABB and plane equation (normal/constant)
+
+	btVector3 tangentDir0,tangentDir1;
+
+	//tangentDir0/tangentDir1 can be precalculated
+	btPlaneSpace1(m_planeNormal,tangentDir0,tangentDir1);
+
+	btVector3 supVertex0,supVertex1;
+
+	btVector3 projectedCenter = center - (m_planeNormal.dot(center) - m_planeConstant)*m_planeNormal;
+	
+	btVector3 triangle[3];
+	triangle[0] = projectedCenter + tangentDir0*radius + tangentDir1*radius;
+	triangle[1] = projectedCenter + tangentDir0*radius - tangentDir1*radius;
+	triangle[2] = projectedCenter - tangentDir0*radius - tangentDir1*radius;
+
+	callback->processTriangle(triangle,0,0);
+
+	triangle[0] = projectedCenter - tangentDir0*radius - tangentDir1*radius;
+	triangle[1] = projectedCenter - tangentDir0*radius + tangentDir1*radius;
+	triangle[2] = projectedCenter + tangentDir0*radius + tangentDir1*radius;
+
+	callback->processTriangle(triangle,0,1);
+
+}
+
+void	btStaticPlaneShape::calculateLocalInertia(btScalar mass,btVector3& inertia) const
+{
+	(void)mass;
+
+	//moving concave objects not supported
+	
+	inertia.setValue(btScalar(0.),btScalar(0.),btScalar(0.));
+}
+
+void	btStaticPlaneShape::setLocalScaling(const btVector3& scaling)
+{
+	m_localScaling = scaling;
+}
+const btVector3& btStaticPlaneShape::getLocalScaling() const
+{
+	return m_localScaling;
+}