public override void InitializeDemo()
{
// Setup the basic world
SetTexturing(true);
SetShadows(true);
SetCameraDistance(5.0f);
m_collisionConfiguration = new DefaultCollisionConfiguration();
m_dispatcher = new CollisionDispatcher(m_collisionConfiguration);
IndexedVector3 worldAabbMin = new IndexedVector3(-10000,-10000,-10000);
IndexedVector3 worldAabbMax = new IndexedVector3(10000,10000,10000);
//m_broadphase = new AxisSweep3Internal(ref worldAabbMin, ref worldAabbMax, 0xfffe, 0xffff, 16384, null, true);
m_broadphase = new SimpleBroadphase(1000, null);
m_constraintSolver = new SequentialImpulseConstraintSolver();
m_dynamicsWorld = new DiscreteDynamicsWorld(m_dispatcher, m_broadphase, m_constraintSolver, m_collisionConfiguration);
//m_dynamicsWorld.getDispatchInfo().m_useConvexConservativeDistanceUtil = true;
//m_dynamicsWorld.getDispatchInfo().m_convexConservativeDistanceThreshold = 0.01f;
// Setup a big ground box
{
CollisionShape groundShape = new BoxShape(new IndexedVector3(200.0f,10.0f,200.0f));
m_collisionShapes.Add(groundShape);
IndexedMatrix groundTransform = IndexedMatrix.CreateTranslation(0,-10,0);
CollisionObject fixedGround = new CollisionObject();
fixedGround.SetCollisionShape(groundShape);
fixedGround.SetWorldTransform(ref groundTransform);
fixedGround.SetUserPointer("Ground");
m_dynamicsWorld.AddCollisionObject(fixedGround);
}
// Spawn one ragdoll
IndexedVector3 startOffset = new IndexedVector3(1,0.5f,0);
//string filename = @"c:\users\man\bullet\xna-ragdoll-constraints-output.txt";
//FileStream filestream = File.Open(filename, FileMode.Create, FileAccess.Write, FileShare.Read);
//BulletGlobals.g_streamWriter = new StreamWriter(filestream);
SpawnRagdoll(ref startOffset, BulletGlobals.g_streamWriter);
//startOffset = new IndexedVector3(-1,0.5f,0);
//spawnRagdoll(ref startOffset);
ClientResetScene();
}
public override void ProcessCollision(CollisionObject body0, CollisionObject body1, DispatcherInfo dispatchInfo, ManifoldResult resultOut)
{
if (m_manifoldPtr == null)
{
return;
}
CollisionObject convexObj = m_isSwapped ? body1 : body0;
CollisionObject planeObj = m_isSwapped ? body0 : body1;
ConvexShape convexShape = convexObj.GetCollisionShape() as ConvexShape;
if (convexShape == null)
{
convexShape = new BoxShape(IndexedVector3.One * 0.5f);
body0.SetCollisionShape(convexShape);
}
StaticPlaneShape planeShape = planeObj.GetCollisionShape() as StaticPlaneShape;
if (planeShape == null)
{
planeShape = new StaticPlaneShape(IndexedVector3.Up, 9f);
}
bool hasCollision = false;
if (convexShape == null || planeShape == null)
{
//resultOut = null;
return;
}
IndexedVector3 planeNormal = planeShape.GetPlaneNormal();
float planeConstant = planeShape.GetPlaneConstant();
IndexedMatrix planeInConvex;
planeInConvex = convexObj.GetWorldTransform().Inverse() * planeObj.GetWorldTransform();
IndexedMatrix convexInPlaneTrans;
convexInPlaneTrans = planeObj.GetWorldTransform().Inverse() * convexObj.GetWorldTransform();
IndexedVector3 vtx = convexShape.LocalGetSupportingVertex(planeInConvex._basis * -planeNormal);
IndexedVector3 vtxInPlane = convexInPlaneTrans * vtx;
float distance = (planeNormal.Dot(vtxInPlane) - planeConstant);
IndexedVector3 vtxInPlaneProjected = vtxInPlane - distance * planeNormal;
IndexedVector3 vtxInPlaneWorld = planeObj.GetWorldTransform() * vtxInPlaneProjected;
hasCollision = distance < m_manifoldPtr.GetContactBreakingThreshold();
resultOut.SetPersistentManifold(m_manifoldPtr);
if (hasCollision)
{
/// report a contact. internally this will be kept persistent, and contact reduction is done
IndexedVector3 normalOnSurfaceB = planeObj.GetWorldTransform()._basis *planeNormal;
IndexedVector3 pOnB = vtxInPlaneWorld;
resultOut.AddContactPoint(normalOnSurfaceB, pOnB, distance);
}
////first perform a collision query with the non-perturbated collision objects
//{
// IndexedQuaternion rotq = IndexedQuaternion.Identity;
// CollideSingleContact(ref rotq, body0, body1, dispatchInfo, resultOut);
//}
if (convexShape.IsPolyhedral() && resultOut.GetPersistentManifold().GetNumContacts() < m_minimumPointsPerturbationThreshold)
{
IndexedVector3 v0;
IndexedVector3 v1;
TransformUtil.PlaneSpace1(ref planeNormal, out v0, out v1);
//now perform 'm_numPerturbationIterations' collision queries with the perturbated collision objects
float angleLimit = 0.125f * MathUtil.SIMD_PI;
float perturbeAngle;
float radius = convexShape.GetAngularMotionDisc();
perturbeAngle = BulletGlobals.gContactBreakingThreshold / radius;
if (perturbeAngle > angleLimit)
{
perturbeAngle = angleLimit;
}
IndexedQuaternion perturbeRot = new IndexedQuaternion(v0, perturbeAngle);
for (int i = 0; i < m_numPerturbationIterations; i++)
{
float iterationAngle = i * (MathUtil.SIMD_2_PI / (float)m_numPerturbationIterations);
IndexedQuaternion rotq = new IndexedQuaternion(planeNormal, iterationAngle);
rotq = IndexedQuaternion.Inverse(rotq) * perturbeRot * rotq;
CollideSingleContact(ref rotq, body0, body1, dispatchInfo, resultOut);
}
}
if (m_ownManifold)
{
if (m_manifoldPtr.GetNumContacts() > 0)
{
resultOut.RefreshContactPoints();
}
}
}
