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Diffstat (limited to 'extern/bullet2/BulletCollision/CollisionShapes/btConvexShape.cpp')
| -rw-r--r-- | extern/bullet2/BulletCollision/CollisionShapes/btConvexShape.cpp | 429 |
1 files changed, 429 insertions, 0 deletions
diff --git a/extern/bullet2/BulletCollision/CollisionShapes/btConvexShape.cpp b/extern/bullet2/BulletCollision/CollisionShapes/btConvexShape.cpp new file mode 100644 index 00000000000..f5f3aa58aa4 --- /dev/null +++ b/extern/bullet2/BulletCollision/CollisionShapes/btConvexShape.cpp @@ -0,0 +1,429 @@ +/* +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 "btConvexShape.h" +#include "btTriangleShape.h" +#include "btSphereShape.h" +#include "btCylinderShape.h" +#include "btCapsuleShape.h" +#include "btConvexHullShape.h" +#include "btConvexPointCloudShape.h" + +///not supported on IBM SDK, until we fix the alignment of btVector3 +#if defined (__CELLOS_LV2__) && defined (__SPU__) +#include <spu_intrinsics.h> +static inline vec_float4 vec_dot3( vec_float4 vec0, vec_float4 vec1 ) +{ + vec_float4 result; + result = spu_mul( vec0, vec1 ); + result = spu_madd( spu_rlqwbyte( vec0, 4 ), spu_rlqwbyte( vec1, 4 ), result ); + return spu_madd( spu_rlqwbyte( vec0, 8 ), spu_rlqwbyte( vec1, 8 ), result ); +} +#endif //__SPU__ + +btConvexShape::btConvexShape () +{ +} + +btConvexShape::~btConvexShape() +{ + +} + + + +static btVector3 convexHullSupport (const btVector3& localDirOrg, const btVector3* points, int numPoints, const btVector3& localScaling) +{ + + btVector3 vec = localDirOrg * localScaling; + +#if defined (__CELLOS_LV2__) && defined (__SPU__) + + btVector3 localDir = vec; + + vec_float4 v_distMax = {-FLT_MAX,0,0,0}; + vec_int4 v_idxMax = {-999,0,0,0}; + int v=0; + int numverts = numPoints; + + for(;v<(int)numverts-4;v+=4) { + vec_float4 p0 = vec_dot3(points[v ].get128(),localDir.get128()); + vec_float4 p1 = vec_dot3(points[v+1].get128(),localDir.get128()); + vec_float4 p2 = vec_dot3(points[v+2].get128(),localDir.get128()); + vec_float4 p3 = vec_dot3(points[v+3].get128(),localDir.get128()); + const vec_int4 i0 = {v ,0,0,0}; + const vec_int4 i1 = {v+1,0,0,0}; + const vec_int4 i2 = {v+2,0,0,0}; + const vec_int4 i3 = {v+3,0,0,0}; + vec_uint4 retGt01 = spu_cmpgt(p0,p1); + vec_float4 pmax01 = spu_sel(p1,p0,retGt01); + vec_int4 imax01 = spu_sel(i1,i0,retGt01); + vec_uint4 retGt23 = spu_cmpgt(p2,p3); + vec_float4 pmax23 = spu_sel(p3,p2,retGt23); + vec_int4 imax23 = spu_sel(i3,i2,retGt23); + vec_uint4 retGt0123 = spu_cmpgt(pmax01,pmax23); + vec_float4 pmax0123 = spu_sel(pmax23,pmax01,retGt0123); + vec_int4 imax0123 = spu_sel(imax23,imax01,retGt0123); + vec_uint4 retGtMax = spu_cmpgt(v_distMax,pmax0123); + v_distMax = spu_sel(pmax0123,v_distMax,retGtMax); + v_idxMax = spu_sel(imax0123,v_idxMax,retGtMax); + } + for(;v<(int)numverts;v++) { + vec_float4 p = vec_dot3(points[v].get128(),localDir.get128()); + const vec_int4 i = {v,0,0,0}; + vec_uint4 retGtMax = spu_cmpgt(v_distMax,p); + v_distMax = spu_sel(p,v_distMax,retGtMax); + v_idxMax = spu_sel(i,v_idxMax,retGtMax); + } + int ptIndex = spu_extract(v_idxMax,0); + const btVector3& supVec= points[ptIndex] * localScaling; + return supVec; +#else + + btScalar newDot,maxDot = btScalar(-BT_LARGE_FLOAT); + int ptIndex = -1; + + for (int i=0;i<numPoints;i++) + { + + newDot = vec.dot(points[i]); + if (newDot > maxDot) + { + maxDot = newDot; + ptIndex = i; + } + } + btAssert(ptIndex >= 0); + btVector3 supVec = points[ptIndex] * localScaling; + return supVec; +#endif //__SPU__ +} + +btVector3 btConvexShape::localGetSupportVertexWithoutMarginNonVirtual (const btVector3& localDir) const +{ + switch (m_shapeType) + { + case SPHERE_SHAPE_PROXYTYPE: + { + return btVector3(0,0,0); + } + case BOX_SHAPE_PROXYTYPE: + { + btBoxShape* convexShape = (btBoxShape*)this; + const btVector3& halfExtents = convexShape->getImplicitShapeDimensions(); + + return btVector3(btFsels(localDir.x(), halfExtents.x(), -halfExtents.x()), + btFsels(localDir.y(), halfExtents.y(), -halfExtents.y()), + btFsels(localDir.z(), halfExtents.z(), -halfExtents.z())); + } + case TRIANGLE_SHAPE_PROXYTYPE: + { + btTriangleShape* triangleShape = (btTriangleShape*)this; + btVector3 dir(localDir.getX(),localDir.getY(),localDir.getZ()); + btVector3* vertices = &triangleShape->m_vertices1[0]; + btVector3 dots(dir.dot(vertices[0]), dir.dot(vertices[1]), dir.dot(vertices[2])); + btVector3 sup = vertices[dots.maxAxis()]; + return btVector3(sup.getX(),sup.getY(),sup.getZ()); + } + case CYLINDER_SHAPE_PROXYTYPE: + { + btCylinderShape* cylShape = (btCylinderShape*)this; + //mapping of halfextents/dimension onto radius/height depends on how cylinder local orientation is (upAxis) + + btVector3 halfExtents = cylShape->getImplicitShapeDimensions(); + btVector3 v(localDir.getX(),localDir.getY(),localDir.getZ()); + int cylinderUpAxis = cylShape->getUpAxis(); + int XX(1),YY(0),ZZ(2); + + switch (cylinderUpAxis) + { + case 0: + { + XX = 1; + YY = 0; + ZZ = 2; + } + break; + case 1: + { + XX = 0; + YY = 1; + ZZ = 2; + } + break; + case 2: + { + XX = 0; + YY = 2; + ZZ = 1; + + } + break; + default: + btAssert(0); + break; + }; + + btScalar radius = halfExtents[XX]; + btScalar halfHeight = halfExtents[cylinderUpAxis]; + + btVector3 tmp; + btScalar d ; + + btScalar s = btSqrt(v[XX] * v[XX] + v[ZZ] * v[ZZ]); + if (s != btScalar(0.0)) + { + d = radius / s; + tmp[XX] = v[XX] * d; + tmp[YY] = v[YY] < 0.0 ? -halfHeight : halfHeight; + tmp[ZZ] = v[ZZ] * d; + return btVector3(tmp.getX(),tmp.getY(),tmp.getZ()); + } else { + tmp[XX] = radius; + tmp[YY] = v[YY] < 0.0 ? -halfHeight : halfHeight; + tmp[ZZ] = btScalar(0.0); + return btVector3(tmp.getX(),tmp.getY(),tmp.getZ()); + } + } + case CAPSULE_SHAPE_PROXYTYPE: + { + btVector3 vec0(localDir.getX(),localDir.getY(),localDir.getZ()); + + btCapsuleShape* capsuleShape = (btCapsuleShape*)this; + btScalar halfHeight = capsuleShape->getHalfHeight(); + int capsuleUpAxis = capsuleShape->getUpAxis(); + + btScalar radius = capsuleShape->getRadius(); + btVector3 supVec(0,0,0); + + btScalar maxDot(btScalar(-BT_LARGE_FLOAT)); + + btVector3 vec = vec0; + btScalar lenSqr = vec.length2(); + if (lenSqr < btScalar(0.0001)) + { + vec.setValue(1,0,0); + } else + { + btScalar rlen = btScalar(1.) / btSqrt(lenSqr ); + vec *= rlen; + } + btVector3 vtx; + btScalar newDot; + { + btVector3 pos(0,0,0); + pos[capsuleUpAxis] = halfHeight; + + //vtx = pos +vec*(radius); + vtx = pos +vec*capsuleShape->getLocalScalingNV()*(radius) - vec * capsuleShape->getMarginNV(); + newDot = vec.dot(vtx); + + + if (newDot > maxDot) + { + maxDot = newDot; + supVec = vtx; + } + } + { + btVector3 pos(0,0,0); + pos[capsuleUpAxis] = -halfHeight; + + //vtx = pos +vec*(radius); + vtx = pos +vec*capsuleShape->getLocalScalingNV()*(radius) - vec * capsuleShape->getMarginNV(); + newDot = vec.dot(vtx); + if (newDot > maxDot) + { + maxDot = newDot; + supVec = vtx; + } + } + return btVector3(supVec.getX(),supVec.getY(),supVec.getZ()); + } + case CONVEX_POINT_CLOUD_SHAPE_PROXYTYPE: + { + btConvexPointCloudShape* convexPointCloudShape = (btConvexPointCloudShape*)this; + btVector3* points = convexPointCloudShape->getUnscaledPoints (); + int numPoints = convexPointCloudShape->getNumPoints (); + return convexHullSupport (localDir, points, numPoints,convexPointCloudShape->getLocalScalingNV()); + } + case CONVEX_HULL_SHAPE_PROXYTYPE: + { + btConvexHullShape* convexHullShape = (btConvexHullShape*)this; + btVector3* points = convexHullShape->getUnscaledPoints(); + int numPoints = convexHullShape->getNumPoints (); + return convexHullSupport (localDir, points, numPoints,convexHullShape->getLocalScalingNV()); + } + default: +#ifndef __SPU__ + return this->localGetSupportingVertexWithoutMargin (localDir); +#else + btAssert (0); +#endif + } + + // should never reach here + btAssert (0); + return btVector3 (btScalar(0.0f), btScalar(0.0f), btScalar(0.0f)); +} + +btVector3 btConvexShape::localGetSupportVertexNonVirtual (const btVector3& localDir) const +{ + btVector3 localDirNorm = localDir; + if (localDirNorm .length2() < (SIMD_EPSILON*SIMD_EPSILON)) + { + localDirNorm.setValue(btScalar(-1.),btScalar(-1.),btScalar(-1.)); + } + localDirNorm.normalize (); + + return localGetSupportVertexWithoutMarginNonVirtual(localDirNorm)+ getMarginNonVirtual() * localDirNorm; +} + +/* TODO: This should be bumped up to btCollisionShape () */ +btScalar btConvexShape::getMarginNonVirtual () const +{ + switch (m_shapeType) + { + case SPHERE_SHAPE_PROXYTYPE: + { + btSphereShape* sphereShape = (btSphereShape*)this; + return sphereShape->getRadius (); + } + case BOX_SHAPE_PROXYTYPE: + { + btBoxShape* convexShape = (btBoxShape*)this; + return convexShape->getMarginNV (); + } + case TRIANGLE_SHAPE_PROXYTYPE: + { + btTriangleShape* triangleShape = (btTriangleShape*)this; + return triangleShape->getMarginNV (); + } + case CYLINDER_SHAPE_PROXYTYPE: + { + btCylinderShape* cylShape = (btCylinderShape*)this; + return cylShape->getMarginNV(); + } + case CAPSULE_SHAPE_PROXYTYPE: + { + btCapsuleShape* capsuleShape = (btCapsuleShape*)this; + return capsuleShape->getMarginNV(); + } + case CONVEX_POINT_CLOUD_SHAPE_PROXYTYPE: + /* fall through */ + case CONVEX_HULL_SHAPE_PROXYTYPE: + { + btPolyhedralConvexShape* convexHullShape = (btPolyhedralConvexShape*)this; + return convexHullShape->getMarginNV(); + } + default: +#ifndef __SPU__ + return this->getMargin (); +#else + btAssert (0); +#endif + } + + // should never reach here + btAssert (0); + return btScalar(0.0f); +} +#ifndef __SPU__ +void btConvexShape::getAabbNonVirtual (const btTransform& t, btVector3& aabbMin, btVector3& aabbMax) const +{ + switch (m_shapeType) + { + case SPHERE_SHAPE_PROXYTYPE: + { + btSphereShape* sphereShape = (btSphereShape*)this; + btScalar radius = sphereShape->getImplicitShapeDimensions().getX();// * convexShape->getLocalScaling().getX(); + btScalar margin = radius + sphereShape->getMarginNonVirtual(); + const btVector3& center = t.getOrigin(); + btVector3 extent(margin,margin,margin); + aabbMin = center - extent; + aabbMax = center + extent; + } + break; + case CYLINDER_SHAPE_PROXYTYPE: + /* fall through */ + case BOX_SHAPE_PROXYTYPE: + { + btBoxShape* convexShape = (btBoxShape*)this; + btScalar margin=convexShape->getMarginNonVirtual(); + btVector3 halfExtents = convexShape->getImplicitShapeDimensions(); + halfExtents += btVector3(margin,margin,margin); + 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; + break; + } + case TRIANGLE_SHAPE_PROXYTYPE: + { + btTriangleShape* triangleShape = (btTriangleShape*)this; + btScalar margin = triangleShape->getMarginNonVirtual(); + for (int i=0;i<3;i++) + { + btVector3 vec(btScalar(0.),btScalar(0.),btScalar(0.)); + vec[i] = btScalar(1.); + + btVector3 sv = localGetSupportVertexWithoutMarginNonVirtual(vec*t.getBasis()); + + btVector3 tmp = t(sv); + aabbMax[i] = tmp[i]+margin; + vec[i] = btScalar(-1.); + tmp = t(localGetSupportVertexWithoutMarginNonVirtual(vec*t.getBasis())); + aabbMin[i] = tmp[i]-margin; + } + } + break; + case CAPSULE_SHAPE_PROXYTYPE: + { + btCapsuleShape* capsuleShape = (btCapsuleShape*)this; + btVector3 halfExtents(capsuleShape->getRadius(),capsuleShape->getRadius(),capsuleShape->getRadius()); + int m_upAxis = capsuleShape->getUpAxis(); + halfExtents[m_upAxis] = capsuleShape->getRadius() + capsuleShape->getHalfHeight(); + halfExtents += btVector3(capsuleShape->getMarginNonVirtual(),capsuleShape->getMarginNonVirtual(),capsuleShape->getMarginNonVirtual()); + 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; + } + break; + case CONVEX_POINT_CLOUD_SHAPE_PROXYTYPE: + case CONVEX_HULL_SHAPE_PROXYTYPE: + { + btPolyhedralConvexAabbCachingShape* convexHullShape = (btPolyhedralConvexAabbCachingShape*)this; + btScalar margin = convexHullShape->getMarginNonVirtual(); + convexHullShape->getNonvirtualAabb (t, aabbMin, aabbMax, margin); + } + break; + default: +#ifndef __SPU__ + this->getAabb (t, aabbMin, aabbMax); +#else + btAssert (0); +#endif + break; + } + + // should never reach here + btAssert (0); +} + +#endif //__SPU__ |