forked from bartvdbraak/blender
af9573e9ea
- Changed license from MIT to ZLib. - Added 3D Sweep and Prune contribution - More stable native constraint solver Sorry for any inconvenience caused by this checkin. All Blender buildsystems require update: added files and moved files.
83 lines
2.2 KiB
C++
83 lines
2.2 KiB
C++
/*
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Bullet Continuous Collision Detection and Physics Library
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Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/
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This software is provided 'as-is', without any express or implied warranty.
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In no event will the authors be held liable for any damages arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it freely,
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subject to the following restrictions:
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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.
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2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include <CollisionShapes/PolyhedralConvexShape.h>
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PolyhedralConvexShape::PolyhedralConvexShape()
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{
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}
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SimdVector3 PolyhedralConvexShape::LocalGetSupportingVertexWithoutMargin(const SimdVector3& vec0)const
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{
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int i;
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SimdVector3 supVec(0,0,0);
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SimdScalar maxDot(-1e30f);
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SimdVector3 vec = vec0;
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SimdScalar lenSqr = vec.length2();
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if (lenSqr < 0.0001f)
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{
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vec.setValue(1,0,0);
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} else
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{
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float rlen = 1.f / SimdSqrt(lenSqr );
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vec *= rlen;
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}
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SimdVector3 vtx;
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SimdScalar newDot;
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for (i=0;i<GetNumVertices();i++)
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{
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GetVertex(i,vtx);
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newDot = vec.dot(vtx);
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if (newDot > maxDot)
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{
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maxDot = newDot;
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supVec = vtx;
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}
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}
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return supVec;
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}
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void PolyhedralConvexShape::CalculateLocalInertia(SimdScalar mass,SimdVector3& inertia)
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{
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//not yet, return box inertia
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float margin = GetMargin();
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SimdTransform ident;
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ident.setIdentity();
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SimdVector3 aabbMin,aabbMax;
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GetAabb(ident,aabbMin,aabbMax);
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SimdVector3 halfExtents = (aabbMax-aabbMin)*0.5f;
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SimdScalar lx=2.f*(halfExtents.x()+margin);
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SimdScalar ly=2.f*(halfExtents.y()+margin);
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SimdScalar lz=2.f*(halfExtents.z()+margin);
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const SimdScalar x2 = lx*lx;
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const SimdScalar y2 = ly*ly;
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const SimdScalar z2 = lz*lz;
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const SimdScalar scaledmass = mass * 0.08333333f;
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inertia = scaledmass * (SimdVector3(y2+z2,x2+z2,x2+y2));
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}
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