public override void ProcessCollision(CollisionObject body0, CollisionObject body1, DispatcherInfo dispatchInfo, ManifoldResult resultOut)
{
if (m_manifoldPtr == null)
{
return;
}
resultOut.SetPersistentManifold(m_manifoldPtr);
SphereShape sphere0 = body0.GetCollisionShape() as SphereShape;
SphereShape sphere1 = body1.GetCollisionShape() as SphereShape;
IndexedVector3 diff = body0.GetWorldTransform()._origin - body1.GetWorldTransform()._origin;
float len = diff.Length();
float radius0 = sphere0.GetRadius();
float radius1 = sphere1.GetRadius();
#if CLEAR_MANIFOLD
m_manifoldPtr.clearManifold(); //don't do this, it disables warmstarting
#endif
///iff distance positive, don't generate a new contact
if (len > (radius0 + radius1))
{
#if !CLEAR_MANIFOLD
resultOut.RefreshContactPoints();
#endif //CLEAR_MANIFOLD
return;
}
///distance (negative means penetration)
float dist = len - (radius0 + radius1);
IndexedVector3 normalOnSurfaceB = new IndexedVector3(1, 0, 0);
if (len > MathUtil.SIMD_EPSILON)
{
normalOnSurfaceB = diff / len;
}
///point on A (worldspace)
///btVector3 pos0 = col0->getWorldTransform().getOrigin() - radius0 * normalOnSurfaceB;
///point on B (worldspace)
IndexedVector3 pos1 = body1.GetWorldTransform()._origin + radius1 * normalOnSurfaceB;
/// report a contact. internally this will be kept persistent, and contact reduction is done
resultOut.AddContactPoint(ref normalOnSurfaceB, ref pos1, dist);
#if !CLEAR_MANIFOLD
resultOut.RefreshContactPoints();
#endif //CLEAR_MANIFOLD
}
//public override void processCollision (CollisionObject body0,CollisionObject body1,DispatcherInfo dispatchInfo,ManifoldResult resultOut)
//{
// CollisionObject convexBody = m_isSwapped ? body1 : body0;
// CollisionObject triBody = m_isSwapped ? body0 : body1;
// if (triBody.getCollisionShape().isConcave())
// {
// CollisionObject triOb = triBody;
// ConcaveShape concaveShape = (ConcaveShape)(triOb.getCollisionShape());
// if (convexBody.getCollisionShape().isConvex())
// {
// float collisionMarginTriangle = concaveShape.getMargin();
// resultOut.setPersistentManifold(m_convexTriangleCallback.m_manifoldPtr);
// m_convexTriangleCallback.setTimeStepAndCounters(collisionMarginTriangle, dispatchInfo, resultOut);
// //Disable persistency. previously, some older algorithm calculated all contacts in one go, so you can clear it here.
// //m_dispatcher.clearManifold(m_convexTriangleCallback.m_manifoldPtr);
// m_convexTriangleCallback.m_manifoldPtr.setBodies(convexBody, triBody);
// IndexedVector3 min = m_convexTriangleCallback.getAabbMin();
// IndexedVector3 max = m_convexTriangleCallback.getAabbMax();
// concaveShape.processAllTriangles(m_convexTriangleCallback, ref min,ref max );
// resultOut.refreshContactPoints();
// }
// }
//}
//public override float calculateTimeOfImpact(CollisionObject body0, CollisionObject body1, DispatcherInfo dispatchInfo, ManifoldResult resultOut)
//{
// CollisionObject convexbody = m_isSwapped ? body1 : body0;
// CollisionObject triBody = m_isSwapped ? body0 : body1;
// //quick approximation using raycast, todo: hook up to the continuous collision detection (one of the btConvexCast)
// //only perform CCD above a certain threshold, this prevents blocking on the long run
// //because object in a blocked ccd state (hitfraction<1) get their linear velocity halved each frame...
// float squareMot0 = (convexbody.getInterpolationWorldTransform()._origin - convexbody.getWorldTransform()._origin).LengthSquared();
// if (squareMot0 < convexbody.getCcdSquareMotionThreshold())
// {
// return 1f;
// }
// //const IndexedVector3& from = convexbody.m_worldTransform._origin;
// //IndexedVector3 to = convexbody.m_interpolationWorldTransform._origin;
// //todo: only do if the motion exceeds the 'radius'
// //IndexedMatrix triInv = IndexedMatrix.Invert(triBody.getWorldTransform());
// //IndexedMatrix convexFromLocal = MathUtil.bulletMatrixMultiply(triInv , convexbody.getWorldTransform());
// //IndexedMatrix convexToLocal = MathUtil.bulletMatrixMultiply(triInv , convexbody.getInterpolationWorldTransform());
// IndexedMatrix triInv = IndexedMatrix.Invert(triBody.getWorldTransform());
// IndexedMatrix convexFromLocal = MathUtil.inverseTimes(triBody.getWorldTransform(), convexbody.getWorldTransform());
// IndexedMatrix convexToLocal = MathUtil.inverseTimes(triBody.getWorldTransform(), convexbody.getInterpolationWorldTransform());
// if (triBody.getCollisionShape().isConcave())
// {
// IndexedVector3 rayAabbMin = convexFromLocal._origin;
// MathUtil.vectorMin(convexToLocal._origin, ref rayAabbMin);
// IndexedVector3 rayAabbMax = convexFromLocal._origin;
// MathUtil.vectorMax(convexToLocal._origin,ref rayAabbMax);
// float ccdRadius0 = convexbody.getCcdSweptSphereRadius();
// rayAabbMin -= new IndexedVector3(ccdRadius0,ccdRadius0,ccdRadius0);
// rayAabbMax += new IndexedVector3(ccdRadius0,ccdRadius0,ccdRadius0);
// float curHitFraction = 1.0f; //is this available?
// LocalTriangleSphereCastCallback raycastCallback = new LocalTriangleSphereCastCallback(ref convexFromLocal, ref convexToLocal,
// convexbody.getCcdSweptSphereRadius(),curHitFraction);
// raycastCallback.m_hitFraction = convexbody.getHitFraction();
// CollisionObject concavebody = triBody;
// ConcaveShape triangleMesh = (ConcaveShape) concavebody.getCollisionShape();
// if (triangleMesh != null)
// {
// triangleMesh.processAllTriangles(raycastCallback,ref rayAabbMin,ref rayAabbMax);
// }
// if (raycastCallback.m_hitFraction < convexbody.getHitFraction())
// {
// convexbody.setHitFraction( raycastCallback.m_hitFraction);
// float result = raycastCallback.m_hitFraction;
// raycastCallback.cleanup();
// return result;
// }
// raycastCallback.cleanup();
// }
// return 1f;
//}
public override void ProcessCollision(CollisionObject bodyA, CollisionObject bodyB, DispatcherInfo dispatchInfo, ManifoldResult resultOut)
{
//fixme
CollisionObject convexBody = m_isSwapped ? bodyB : bodyA;
CollisionObject triBody = m_isSwapped ? bodyA : bodyB;
if (triBody.GetCollisionShape().IsConcave())
{
CollisionObject triOb = triBody;
ConcaveShape concaveShape = triOb.GetCollisionShape() as ConcaveShape;
if (convexBody.GetCollisionShape().IsConvex())
{
float collisionMarginTriangle = concaveShape.GetMargin();
resultOut.SetPersistentManifold(m_convexTriangleCallback.m_manifoldPtr);
m_convexTriangleCallback.SetTimeStepAndCounters(collisionMarginTriangle, dispatchInfo, resultOut);
//Disable persistency. previously, some older algorithm calculated all contacts in one go, so you can clear it here.
//m_dispatcher->clearManifold(m_btConvexTriangleCallback.m_manifoldPtr);
m_convexTriangleCallback.m_manifoldPtr.SetBodies(convexBody, triBody);
IndexedVector3 min = m_convexTriangleCallback.GetAabbMin();
IndexedVector3 max = m_convexTriangleCallback.GetAabbMax();
concaveShape.ProcessAllTriangles(m_convexTriangleCallback, ref min, ref max);
resultOut.RefreshContactPoints();
}
}
}
public override void ProcessCollision(CollisionObject body0, CollisionObject body1, DispatcherInfo dispatchInfo, ManifoldResult resultOut)
{
//resultOut = new ManifoldResult();
if (m_manifoldPtr == null)
{
return;
}
CollisionObject sphereObj = m_swapped ? body1 : body0;
CollisionObject triObj = m_swapped ? body0 : body1;
SphereShape sphere = sphereObj.GetCollisionShape() as SphereShape;
TriangleShape triangle = triObj.GetCollisionShape() as TriangleShape;
/// report a contact. internally this will be kept persistent, and contact reduction is done
resultOut.SetPersistentManifold(m_manifoldPtr);
using (SphereTriangleDetector detector = BulletGlobals.SphereTriangleDetectorPool.Get())
{
detector.Initialize(sphere, triangle, m_manifoldPtr.GetContactBreakingThreshold());
ClosestPointInput input = ClosestPointInput.Default();
input.m_maximumDistanceSquared = float.MaxValue;
sphereObj.GetWorldTransform(out input.m_transformA);
triObj.GetWorldTransform(out input.m_transformB);
bool swapResults = m_swapped;
detector.GetClosestPoints(ref input, resultOut, dispatchInfo.getDebugDraw(), swapResults);
if (m_ownManifold)
{
resultOut.RefreshContactPoints();
}
}
}
public override void ProcessCollision(CollisionObject body0, CollisionObject body1, DispatcherInfo dispatchInfo, ManifoldResult resultOut)
{
if (m_manifoldPtr == null)
{
//swapped?
m_manifoldPtr = m_dispatcher.GetNewManifold(body0, body1);
m_ownManifold = true;
}
resultOut.SetPersistentManifold(m_manifoldPtr);
//comment-out next line to test multi-contact generation
//resultOut.getPersistentManifold().clearManifold();
ConvexShape min0 = body0.GetCollisionShape() as ConvexShape;
ConvexShape min1 = body1.GetCollisionShape() as ConvexShape;
IndexedVector3 normalOnB = IndexedVector3.Zero;
IndexedVector3 pointOnBWorld = IndexedVector3.Zero;
{
ClosestPointInput input = ClosestPointInput.Default();
using (GjkPairDetector gjkPairDetector = BulletGlobals.GjkPairDetectorPool.Get())
{
gjkPairDetector.Initialize(min0, min1, m_simplexSolver, m_pdSolver);
//TODO: if (dispatchInfo.m_useContinuous)
gjkPairDetector.SetMinkowskiA(min0);
gjkPairDetector.SetMinkowskiB(min1);
{
input.m_maximumDistanceSquared = min0.GetMargin() + min1.GetMargin() + m_manifoldPtr.GetContactBreakingThreshold();
input.m_maximumDistanceSquared *= input.m_maximumDistanceSquared;
}
input.m_transformA = body0.GetWorldTransform();
input.m_transformB = body1.GetWorldTransform();
gjkPairDetector.GetClosestPoints(ref input, resultOut, dispatchInfo.getDebugDraw(), false);
#if DEBUG
if (BulletGlobals.g_streamWriter != null)
{
BulletGlobals.g_streamWriter.WriteLine("c2dc2d processCollision");
MathUtil.PrintMatrix(BulletGlobals.g_streamWriter, "transformA", input.m_transformA);
MathUtil.PrintMatrix(BulletGlobals.g_streamWriter, "transformB", input.m_transformB);
}
#endif
}
//BulletGlobals.GjkPairDetectorPool.Free(gjkPairDetector);
//btVector3 v0,v1;
//btVector3 sepNormalWorldSpace;
}
if (m_ownManifold)
{
resultOut.RefreshContactPoints();
}
}
public override void ProcessCollision(CollisionObject body0, CollisionObject body1, DispatcherInfo dispatchInfo, ManifoldResult resultOut)
{
if (m_manifoldPtr == null)
{
return;
}
CollisionObject col0 = body0;
CollisionObject col1 = body1;
//resultOut = new ManifoldResult(body0, body1);
BoxShape box0 = col0.GetCollisionShape() as BoxShape;
BoxShape box1 = col1.GetCollisionShape() as BoxShape;
//if (((String)col0.getUserPointer()).Contains("Box") &&
// ((String)col1.getUserPointer()).Contains("Box") )
//{
// int ibreak = 0;
//}
/// report a contact. internally this will be kept persistent, and contact reduction is done
resultOut.SetPersistentManifold(m_manifoldPtr);
#if !USE_PERSISTENT_CONTACTS
m_manifoldPtr.ClearManifold();
#endif //USE_PERSISTENT_CONTACTS
ClosestPointInput input = ClosestPointInput.Default();
input.m_maximumDistanceSquared = float.MaxValue;
input.m_transformA = body0.GetWorldTransform();
input.m_transformB = body1.GetWorldTransform();
BoxBoxDetector.GetClosestPoints(box0, box1, ref input, resultOut, dispatchInfo.getDebugDraw(), false);
#if USE_PERSISTENT_CONTACTS
// refreshContactPoints is only necessary when using persistent contact points. otherwise all points are newly added
if (m_ownManifold)
{
resultOut.RefreshContactPoints();
}
#endif //USE_PERSISTENT_CONTACTS
}
public override void ProcessCollision(CollisionObject body0, CollisionObject body1, DispatcherInfo dispatchInfo, ManifoldResult resultOut)
{
if (m_manifoldPtr == null)
{
return;
}
CollisionObject col0 = body0;
CollisionObject col1 = body1;
Box2dShape box0 = (Box2dShape)col0.GetCollisionShape();
Box2dShape box1 = (Box2dShape)col1.GetCollisionShape();
resultOut.SetPersistentManifold(m_manifoldPtr);
B2CollidePolygons(ref resultOut, box0, col0.GetWorldTransform(), box1, col1.GetWorldTransform());
// refreshContactPoints is only necessary when using persistent contact points. otherwise all points are newly added
if (m_ownManifold)
{
resultOut.RefreshContactPoints();
}
}
public override void ProcessCollision(CollisionObject body0, CollisionObject body1, DispatcherInfo dispatchInfo, ManifoldResult resultOut)
{
//(void)dispatchInfo;
//(void)resultOut;
if (m_manifoldPtr == null)
{
return;
}
CollisionObject sphereObj = m_isSwapped ? body1 : body0;
CollisionObject boxObj = m_isSwapped ? body0 : body1;
IndexedVector3 pOnBox = new IndexedVector3();;
IndexedVector3 normalOnSurfaceB = new IndexedVector3();
float penetrationDepth = 0f;
IndexedVector3 sphereCenter = sphereObj.GetWorldTransform()._origin;
SphereShape sphere0 = sphereObj.GetCollisionShape() as SphereShape;
float radius = sphere0.GetRadius();
float maxContactDistance = m_manifoldPtr.GetContactBreakingThreshold();
resultOut.SetPersistentManifold(m_manifoldPtr);
if (GetSphereDistance(boxObj, ref pOnBox, ref normalOnSurfaceB, ref penetrationDepth, sphereCenter, radius, maxContactDistance))
{
/// report a contact. internally this will be kept persistent, and contact reduction is done
resultOut.AddContactPoint(normalOnSurfaceB, pOnBox, penetrationDepth);
}
if (m_ownManifold)
{
if (m_manifoldPtr.GetNumContacts() > 0)
{
resultOut.RefreshContactPoints();
}
}
}
public override void ProcessCollision(CollisionObject body0, CollisionObject body1, DispatcherInfo dispatchInfo, ManifoldResult resultOut)
{
if (m_manifoldPtr == null)
{
//swapped?
m_manifoldPtr = m_dispatcher.GetNewManifold(body0, body1);
m_ownManifold = true;
}
//resultOut = new ManifoldResult();
resultOut.SetPersistentManifold(m_manifoldPtr);
//comment-out next line to test multi-contact generation
//resultOut.GetPersistentManifold().ClearManifold();
ConvexShape min0 = body0.GetCollisionShape() as ConvexShape;
ConvexShape min1 = body1.GetCollisionShape() as ConvexShape;
IndexedVector3 normalOnB;
IndexedVector3 pointOnBWorld;
#if !BT_DISABLE_CAPSULE_CAPSULE_COLLIDER
if ((min0.GetShapeType() == BroadphaseNativeTypes.CAPSULE_SHAPE_PROXYTYPE) && (min1.GetShapeType() == BroadphaseNativeTypes.CAPSULE_SHAPE_PROXYTYPE))
{
CapsuleShape capsuleA = min0 as CapsuleShape;
CapsuleShape capsuleB = min1 as CapsuleShape;
//IndexedVector3 localScalingA = capsuleA.GetLocalScaling();
//IndexedVector3 localScalingB = capsuleB.GetLocalScaling();
float threshold = m_manifoldPtr.GetContactBreakingThreshold();
float dist = CapsuleCapsuleDistance(out normalOnB, out pointOnBWorld, capsuleA.GetHalfHeight(), capsuleA.GetRadius(),
capsuleB.GetHalfHeight(), capsuleB.GetRadius(), capsuleA.GetUpAxis(), capsuleB.GetUpAxis(),
body0.GetWorldTransform(), body1.GetWorldTransform(), threshold);
if (dist < threshold)
{
Debug.Assert(normalOnB.LengthSquared() >= (MathUtil.SIMD_EPSILON * MathUtil.SIMD_EPSILON));
resultOut.AddContactPoint(ref normalOnB, ref pointOnBWorld, dist);
}
resultOut.RefreshContactPoints();
return;
}
#endif //BT_DISABLE_CAPSULE_CAPSULE_COLLIDER
#if USE_SEPDISTANCE_UTIL2
if (dispatchInfo.m_useConvexConservativeDistanceUtil)
{
m_sepDistance.updateSeparatingDistance(body0.getWorldTransform(), body1.getWorldTransform());
}
if (!dispatchInfo.m_useConvexConservativeDistanceUtil || m_sepDistance.getConservativeSeparatingDistance() <= 0.f)
#endif //USE_SEPDISTANCE_UTIL2
{
ClosestPointInput input = ClosestPointInput.Default();
using (GjkPairDetector gjkPairDetector = BulletGlobals.GjkPairDetectorPool.Get())
{
gjkPairDetector.Initialize(min0, min1, m_simplexSolver, m_pdSolver);
//TODO: if (dispatchInfo.m_useContinuous)
gjkPairDetector.SetMinkowskiA(min0);
gjkPairDetector.SetMinkowskiB(min1);
#if USE_SEPDISTANCE_UTIL2
if (dispatchInfo.m_useConvexConservativeDistanceUtil)
{
input.m_maximumDistanceSquared = float.MaxValue;
}
else
#endif //USE_SEPDISTANCE_UTIL2
{
input.m_maximumDistanceSquared = min0.GetMargin() + min1.GetMargin() + m_manifoldPtr.GetContactBreakingThreshold();
input.m_maximumDistanceSquared *= input.m_maximumDistanceSquared;
}
//input.m_stackAlloc = dispatchInfo.m_stackAllocator;
input.m_transformA = body0.GetWorldTransform();
input.m_transformB = body1.GetWorldTransform();
if (min0.IsPolyhedral() && min1.IsPolyhedral())
{
DummyResult dummy = new DummyResult();
PolyhedralConvexShape polyhedronA = min0 as PolyhedralConvexShape;
PolyhedralConvexShape polyhedronB = min1 as PolyhedralConvexShape;
if (polyhedronA.GetConvexPolyhedron() != null && polyhedronB.GetConvexPolyhedron() != null)
{
float threshold = m_manifoldPtr.GetContactBreakingThreshold();
float minDist = float.MinValue;
IndexedVector3 sepNormalWorldSpace = new IndexedVector3(0, 1, 0);
bool foundSepAxis = true;
if (dispatchInfo.m_enableSatConvex)
{
foundSepAxis = PolyhedralContactClipping.FindSeparatingAxis(
polyhedronA.GetConvexPolyhedron(), polyhedronB.GetConvexPolyhedron(),
body0.GetWorldTransform(),
body1.GetWorldTransform(),
out sepNormalWorldSpace);
}
else
{
#if ZERO_MARGIN
gjkPairDetector.SetIgnoreMargin(true);
gjkPairDetector.GetClosestPoints(input, resultOut, dispatchInfo.m_debugDraw);
#else
gjkPairDetector.GetClosestPoints(ref input, dummy, dispatchInfo.m_debugDraw);
#endif
float l2 = gjkPairDetector.GetCachedSeparatingAxis().LengthSquared();
if (l2 > MathUtil.SIMD_EPSILON)
{
sepNormalWorldSpace = gjkPairDetector.GetCachedSeparatingAxis() * (1.0f / l2);
//minDist = -1e30f;//gjkPairDetector.getCachedSeparatingDistance();
minDist = gjkPairDetector.GetCachedSeparatingDistance() - min0.GetMargin() - min1.GetMargin();
#if ZERO_MARGIN
foundSepAxis = true; //gjkPairDetector.getCachedSeparatingDistance()<0.f;
#else
foundSepAxis = gjkPairDetector.GetCachedSeparatingDistance() < (min0.GetMargin() + min1.GetMargin());
#endif
}
}
if (foundSepAxis)
{
// printf("sepNormalWorldSpace=%f,%f,%f\n",sepNormalWorldSpace.getX(),sepNormalWorldSpace.getY(),sepNormalWorldSpace.getZ());
PolyhedralContactClipping.ClipHullAgainstHull(sepNormalWorldSpace, polyhedronA.GetConvexPolyhedron(), polyhedronB.GetConvexPolyhedron(),
body0.GetWorldTransform(),
body1.GetWorldTransform(), minDist - threshold, threshold, resultOut);
}
if (m_ownManifold)
{
resultOut.RefreshContactPoints();
}
return;
}
else
{
//we can also deal with convex versus triangle (without connectivity data)
if (polyhedronA.GetConvexPolyhedron() != null && polyhedronB.GetShapeType() == BroadphaseNativeTypes.TRIANGLE_SHAPE_PROXYTYPE)
{
m_vertices.Clear();
TriangleShape tri = polyhedronB as TriangleShape;
m_vertices.Add(body1.GetWorldTransform() * tri.m_vertices1[0]);
m_vertices.Add(body1.GetWorldTransform() * tri.m_vertices1[1]);
m_vertices.Add(body1.GetWorldTransform() * tri.m_vertices1[2]);
float threshold = m_manifoldPtr.GetContactBreakingThreshold();
IndexedVector3 sepNormalWorldSpace = new IndexedVector3(0, 1, 0);;
float minDist = float.MinValue;
float maxDist = threshold;
bool foundSepAxis = false;
if (false)
{
polyhedronB.InitializePolyhedralFeatures();
foundSepAxis = PolyhedralContactClipping.FindSeparatingAxis(
polyhedronA.GetConvexPolyhedron(), polyhedronB.GetConvexPolyhedron(),
body0.GetWorldTransform(),
body1.GetWorldTransform(),
out sepNormalWorldSpace);
// printf("sepNormalWorldSpace=%f,%f,%f\n",sepNormalWorldSpace.getX(),sepNormalWorldSpace.getY(),sepNormalWorldSpace.getZ());
}
else
{
#if ZERO_MARGIN
gjkPairDetector.SetIgnoreMargin(true);
gjkPairDetector.GetClosestPoints(input, resultOut, dispatchInfo.m_debugDraw);
#else
gjkPairDetector.GetClosestPoints(ref input, dummy, dispatchInfo.m_debugDraw);
#endif//ZERO_MARGIN
float l2 = gjkPairDetector.GetCachedSeparatingAxis().LengthSquared();
if (l2 > MathUtil.SIMD_EPSILON)
{
sepNormalWorldSpace = gjkPairDetector.GetCachedSeparatingAxis() * (1.0f / l2);
//minDist = gjkPairDetector.getCachedSeparatingDistance();
//maxDist = threshold;
minDist = gjkPairDetector.GetCachedSeparatingDistance() - min0.GetMargin() - min1.GetMargin();
foundSepAxis = true;
}
}
if (foundSepAxis)
{
PolyhedralContactClipping.ClipFaceAgainstHull(sepNormalWorldSpace, polyhedronA.GetConvexPolyhedron(),
body0.GetWorldTransform(), m_vertices, minDist - threshold, maxDist, resultOut);
}
if (m_ownManifold)
{
resultOut.RefreshContactPoints();
}
return;
}
}
}
gjkPairDetector.GetClosestPoints(ref input, resultOut, dispatchInfo.getDebugDraw(), false);
#if USE_SEPDISTANCE_UTIL2
float sepDist = 0.f;
if (dispatchInfo.m_useConvexConservativeDistanceUtil)
{
sepDist = gjkPairDetector.getCachedSeparatingDistance();
if (sepDist > MathUtil.SIMD_EPSILON)
{
sepDist += dispatchInfo.m_convexConservativeDistanceThreshold;
//now perturbe directions to get multiple contact points
}
}
#endif //USE_SEPDISTANCE_UTIL2
//now perform 'm_numPerturbationIterations' collision queries with the perturbated collision objects
//perform perturbation when more then 'm_minimumPointsPerturbationThreshold' points
if (m_numPerturbationIterations > 0 && resultOut.GetPersistentManifold().GetNumContacts() < m_minimumPointsPerturbationThreshold)
{
IndexedVector3 v0, v1;
IndexedVector3 sepNormalWorldSpace = gjkPairDetector.GetCachedSeparatingAxis();
sepNormalWorldSpace.Normalize();
TransformUtil.PlaneSpace1(ref sepNormalWorldSpace, out v0, out v1);
bool perturbeA = true;
const float angleLimit = 0.125f * MathUtil.SIMD_PI;
float perturbeAngle;
float radiusA = min0.GetAngularMotionDisc();
float radiusB = min1.GetAngularMotionDisc();
if (radiusA < radiusB)
{
perturbeAngle = BulletGlobals.gContactBreakingThreshold / radiusA;
perturbeA = true;
}
else
{
perturbeAngle = BulletGlobals.gContactBreakingThreshold / radiusB;
perturbeA = false;
}
if (perturbeAngle > angleLimit)
{
perturbeAngle = angleLimit;
}
IndexedMatrix unPerturbedTransform;
if (perturbeA)
{
unPerturbedTransform = input.m_transformA;
}
else
{
unPerturbedTransform = input.m_transformB;
}
for (int i = 0; i < m_numPerturbationIterations; i++)
{
if (v0.LengthSquared() > MathUtil.SIMD_EPSILON)
{
IndexedQuaternion perturbeRot = new IndexedQuaternion(v0, perturbeAngle);
float iterationAngle = i * (MathUtil.SIMD_2_PI / (float)m_numPerturbationIterations);
IndexedQuaternion rotq = new IndexedQuaternion(sepNormalWorldSpace, iterationAngle);
if (perturbeA)
{
input.m_transformA._basis = (new IndexedBasisMatrix(MathUtil.QuaternionInverse(rotq) * perturbeRot * rotq) * body0.GetWorldTransform()._basis);
input.m_transformB = body1.GetWorldTransform();
input.m_transformB = body1.GetWorldTransform();
#if DEBUG_CONTACTS
dispatchInfo.m_debugDraw.DrawTransform(ref input.m_transformA, 10.0f);
#endif //DEBUG_CONTACTS
}
else
{
input.m_transformA = body0.GetWorldTransform();
input.m_transformB._basis = (new IndexedBasisMatrix(MathUtil.QuaternionInverse(rotq) * perturbeRot * rotq) * body1.GetWorldTransform()._basis);
#if DEBUG_CONTACTS
dispatchInfo.m_debugDraw.DrawTransform(ref input.m_transformB, 10.0f);
#endif
}
PerturbedContactResult perturbedResultOut = new PerturbedContactResult(resultOut, ref input.m_transformA, ref input.m_transformB, ref unPerturbedTransform, perturbeA, dispatchInfo.getDebugDraw());
gjkPairDetector.GetClosestPoints(ref input, perturbedResultOut, dispatchInfo.getDebugDraw(), false);
}
}
}
#if USE_SEPDISTANCE_UTIL2
if (dispatchInfo.m_useConvexConservativeDistanceUtil && (sepDist > MathUtil.SIMD_EPSILON))
{
m_sepDistance.initSeparatingDistance(gjkPairDetector.getCachedSeparatingAxis(), sepDist, body0.getWorldTransform(), body1.getWorldTransform());
}
#endif //USE_SEPDISTANCE_UTIL2
}
}
if (m_ownManifold)
{
resultOut.RefreshContactPoints();
}
}
public override void ProcessCollision(CollisionObject body0, CollisionObject body1, DispatcherInfo dispatchInfo, ManifoldResult resultOut)
{
//resultOut = null;
CollisionObject colObj = m_isSwapped ? body1 : body0;
CollisionObject otherObj = m_isSwapped ? body0 : body1;
Debug.Assert(colObj.GetCollisionShape().IsCompound());
CompoundShape compoundShape = (CompoundShape)(colObj.GetCollisionShape());
///btCompoundShape might have changed:
////make sure the internal child collision algorithm caches are still valid
if (compoundShape.GetUpdateRevision() != m_compoundShapeRevision)
{
///clear and update all
RemoveChildAlgorithms();
PreallocateChildAlgorithms(body0, body1);
}
Dbvt tree = compoundShape.GetDynamicAabbTree();
//use a dynamic aabb tree to cull potential child-overlaps
using (CompoundLeafCallback callback = BulletGlobals.CompoundLeafCallbackPool.Get())
{
callback.Initialize(colObj, otherObj, m_dispatcher, dispatchInfo, resultOut, this, m_childCollisionAlgorithms, m_sharedManifold);
///we need to refresh all contact manifolds
///note that we should actually recursively traverse all children, btCompoundShape can nested more then 1 level deep
///so we should add a 'refreshManifolds' in the btCollisionAlgorithm
{
m_manifoldArray.Clear();
for (int i = 0; i < m_childCollisionAlgorithms.Count; i++)
{
if (m_childCollisionAlgorithms[i] != null)
{
m_childCollisionAlgorithms[i].GetAllContactManifolds(m_manifoldArray);
for (int m = 0; m < m_manifoldArray.Count; m++)
{
if (m_manifoldArray[m].GetNumContacts() > 0)
{
resultOut.SetPersistentManifold(m_manifoldArray[m]);
resultOut.RefreshContactPoints();
resultOut.SetPersistentManifold(null);//??necessary?
}
}
m_manifoldArray.Clear();
}
}
}
if (tree != null)
{
IndexedVector3 localAabbMin;
IndexedVector3 localAabbMax;
IndexedMatrix otherInCompoundSpace;
//otherInCompoundSpace = MathUtil.BulletMatrixMultiply(colObj.GetWorldTransform(),otherObj.GetWorldTransform());
otherInCompoundSpace = colObj.GetWorldTransform().Inverse() * otherObj.GetWorldTransform();
otherObj.GetCollisionShape().GetAabb(ref otherInCompoundSpace, out localAabbMin, out localAabbMax);
DbvtAabbMm bounds = DbvtAabbMm.FromMM(ref localAabbMin, ref localAabbMax);
//process all children, that overlap with the given AABB bounds
Dbvt.CollideTV(tree.m_root, ref bounds, callback);
}
else
{
//iterate over all children, perform an AABB check inside ProcessChildShape
int numChildren = m_childCollisionAlgorithms.Count;
for (int i = 0; i < numChildren; i++)
{
callback.ProcessChildShape(compoundShape.GetChildShape(i), i);
}
}
{
//iterate over all children, perform an AABB check inside ProcessChildShape
int numChildren = m_childCollisionAlgorithms.Count;
m_manifoldArray.Clear();
CollisionShape childShape = null;
IndexedMatrix orgTrans;
IndexedMatrix orgInterpolationTrans;
IndexedMatrix newChildWorldTrans;
for (int i = 0; i < numChildren; i++)
{
if (m_childCollisionAlgorithms[i] != null)
{
childShape = compoundShape.GetChildShape(i);
//if not longer overlapping, remove the algorithm
orgTrans = colObj.GetWorldTransform();
orgInterpolationTrans = colObj.GetInterpolationWorldTransform();
IndexedMatrix childTrans = compoundShape.GetChildTransform(i);
newChildWorldTrans = orgTrans * childTrans;
//perform an AABB check first
IndexedVector3 aabbMin0;
IndexedVector3 aabbMax0;
IndexedVector3 aabbMin1;
IndexedVector3 aabbMax1;
childShape.GetAabb(ref newChildWorldTrans, out aabbMin0, out aabbMax0);
otherObj.GetCollisionShape().GetAabb(otherObj.GetWorldTransform(), out aabbMin1, out aabbMax1);
if (!AabbUtil2.TestAabbAgainstAabb2(ref aabbMin0, ref aabbMax0, ref aabbMin1, ref aabbMax1))
{
m_dispatcher.FreeCollisionAlgorithm(m_childCollisionAlgorithms[i]);
m_childCollisionAlgorithms[i] = null;
}
}
}
}
}
}