void solveContactCoulomb_BStatic(const PxSolverConstraintDesc& desc, SolverContext& /*cache*/)
{
PxSolverBody& b0 = *desc.bodyA;
Vec3V linVel0 = V3LoadA(b0.linearVelocity);
Vec3V angState0 = V3LoadA(b0.angularState);
SolverContactCoulombHeader* firstHeader = reinterpret_cast<SolverContactCoulombHeader*>(desc.constraint);
const PxU8* PX_RESTRICT last = desc.constraint + firstHeader->frictionOffset;//getConstraintLength(desc);
//hopefully pointer aliasing doesn't bite.
PxU8* PX_RESTRICT currPtr = desc.constraint;
//const FloatV zero = FZero();
while(currPtr < last)
{
SolverContactCoulombHeader* PX_RESTRICT hdr = reinterpret_cast<SolverContactCoulombHeader*>(currPtr);
currPtr += sizeof(SolverContactCoulombHeader);
const PxU32 numNormalConstr = hdr->numNormalConstr;
SolverContactPoint* PX_RESTRICT contacts = reinterpret_cast<SolverContactPoint*>(currPtr);
Ps::prefetchLine(contacts);
currPtr += numNormalConstr * sizeof(SolverContactPoint);
PxF32* appliedImpulse = reinterpret_cast<PxF32*> ((reinterpret_cast<PxU8*>(hdr)) + hdr->frictionOffset + sizeof(SolverFrictionHeader));
Ps::prefetchLine(appliedImpulse);
const Vec3V normal = hdr->getNormal();
const FloatV invMassDom0 = FLoad(hdr->dominance0);
const FloatV angD0 = FLoad(hdr->angDom0);
solveStaticContacts(contacts, numNormalConstr, normal, invMassDom0,
angD0, linVel0, angState0, appliedImpulse);
}
// Write back
V3StoreA(linVel0, b0.linearVelocity);
V3StoreA(angState0, b0.angularState);
PX_ASSERT(currPtr == last);
}
void PxcFsPropagateDrivenInertiaSimd(PxcFsData& matrix,
const PxcFsInertia* baseInertia,
const PxReal* isf,
const Mat33V* load,
PxcFsScratchAllocator allocator)
{
typedef PxcArticulationFnsSimd<PxcArticulationFnsSimdBase> Fns;
PxcSIMDSpatial IS[3];
PxcFsRow* rows = getFsRows(matrix);
const PxcFsRowAux* aux = getAux(matrix);
const PxcFsJointVectors* jointVectors = getJointVectors(matrix);
PxcFsInertia *inertia = allocator.alloc<PxcFsInertia>(matrix.linkCount);
PxMemCopy(inertia, baseInertia, matrix.linkCount*sizeof(PxcFsInertia));
for(PxU32 i=matrix.linkCount; --i>0;)
{
PxcFsRow& r = rows[i];
const PxcFsRowAux& a = aux[i];
const PxcFsJointVectors& jv = jointVectors[i];
Mat33V m = Fns::computeSIS(inertia[i], a.S, IS);
FloatV f = FLoad(isf[i]);
Mat33V D = Fns::invertSym33(Mat33V(V3ScaleAdd(load[i].col0, f, m.col0),
V3ScaleAdd(load[i].col1, f, m.col1),
V3ScaleAdd(load[i].col2, f, m.col2)));
r.D = D;
inertia[matrix.parent[i]] = Fns::addInertia(inertia[matrix.parent[i]],
Fns::translateInertia(jv.parentOffset, Fns::multiplySubtract(inertia[i], D, IS, r.DSI)));
}
getRootInverseInertia(matrix) = Fns::invertInertia(inertia[0]);
}
bool setupFinalizeExtSolverConstraintsCoulomb(PxcNpWorkUnit& n,
const ContactBuffer& buffer,
const PxcCorrelationBufferCoulomb& c,
const PxTransform& bodyFrame0,
const PxTransform& bodyFrame1,
bool /*perPointFriction*/,
PxU8* workspace,
PxReal invDt,
PxReal bounceThreshold,
PxsSolverExtBody& b0,
PxsSolverExtBody& b1,
PxU32 frictionCountPerPoint,
PxReal invMassScale0, PxReal invInertiaScale0,
PxReal invMassScale1, PxReal invInertiaScale1)
{
// NOTE II: the friction patches are sparse (some of them have no contact patches, and
// therefore did not get written back to the cache) but the patch addresses are dense,
// corresponding to valid patches
PxU8* PX_RESTRICT ptr = workspace;
const FloatV zero=FZero();
//KS - TODO - this should all be done in SIMD to avoid LHS
const PxF32 maxPenBias0 = b0.mLinkIndex == PxcSolverConstraintDesc::NO_LINK ? b0.mBodyData->penBiasClamp : getMaxPenBias(*b0.mFsData)[b0.mLinkIndex];
const PxF32 maxPenBias1 = b1.mLinkIndex == PxcSolverConstraintDesc::NO_LINK ? b1.mBodyData->penBiasClamp : getMaxPenBias(*b1.mFsData)[b0.mLinkIndex];
const FloatV maxPen = FLoad(PxMax(maxPenBias0, maxPenBias1)/invDt);
const FloatV restDistance = FLoad(n.restDistance);
Ps::prefetchLine(c.contactID);
Ps::prefetchLine(c.contactID, 128);
bool useExtContacts = (n.flags & (PxcNpWorkUnitFlag::eARTICULATION_BODY0|PxcNpWorkUnitFlag::eARTICULATION_BODY1))!=0;
const PxU32 frictionPatchCount = c.frictionPatchCount;
const bool staticBody = ((n.flags & PxcNpWorkUnitFlag::eDYNAMIC_BODY1) == 0);
const PxU32 pointStride = useExtContacts ? sizeof(PxcSolverContactExt) : sizeof(PxcSolverContact);
const PxU32 frictionStride = useExtContacts ? sizeof(PxcSolverFrictionExt) : sizeof(PxcSolverFriction);
const PxU8 pointHeaderType = Ps::to8(useExtContacts ? PXS_SC_TYPE_EXT_CONTACT : (staticBody ? PXS_SC_TYPE_STATIC_CONTACT : PXS_SC_TYPE_RB_CONTACT));
const PxU8 frictionHeaderType = Ps::to8(useExtContacts ? PXS_SC_TYPE_EXT_FRICTION : (staticBody ? PXS_SC_TYPE_STATIC_FRICTION : PXS_SC_TYPE_FRICTION));
PxReal d0 = n.dominance0 * invMassScale0;
PxReal d1 = n.dominance1 * invMassScale1;
PxReal angD0 = n.dominance0 * invInertiaScale0;
PxReal angD1 = n.dominance1 * invInertiaScale1;
for(PxU32 i=0;i< frictionPatchCount;i++)
{
const PxU32 contactCount = c.frictionPatchContactCounts[i];
if(contactCount == 0)
continue;
const Gu::ContactPoint* contactBase0 = buffer.contacts + c.contactPatches[c.correlationListHeads[i]].start;
const PxcFrictionPatchCoulomb& frictionPatch = c.frictionPatches[i];
const Vec3V normalV = Ps::aos::V3LoadU(frictionPatch.normal);
const PxVec3 normal = frictionPatch.normal;
const PxReal combinedRestitution = contactBase0->restitution;
PxcSolverContactCoulombHeader* PX_RESTRICT header = reinterpret_cast<PxcSolverContactCoulombHeader*>(ptr);
ptr += sizeof(PxcSolverContactCoulombHeader);
Ps::prefetchLine(ptr, 128);
Ps::prefetchLine(ptr, 256);
Ps::prefetchLine(ptr, 384);
header->numNormalConstr = (PxU8)contactCount;
header->type = pointHeaderType;
header->setRestitution(combinedRestitution);
header->setDominance0(d0);
header->setDominance1(d1);
header->angDom0 = angD0;
header->angDom1 = angD1;
header->setNormal(normalV);
for(PxU32 patch=c.correlationListHeads[i];
patch!=PxcCorrelationBuffer::LIST_END;
patch = c.contactPatches[patch].next)
{
const PxU32 count = c.contactPatches[patch].count;
const Gu::ContactPoint* contactBase = buffer.contacts + c.contactPatches[patch].start;
PxU8* p = ptr;
for(PxU32 j=0;j<count;j++)
{
const Gu::ContactPoint& contact = contactBase[j];
PxcSolverContactExt* PX_RESTRICT solverContact = reinterpret_cast<PxcSolverContactExt*>(p);
p += pointStride;
const FloatV separation = FLoad(contact.separation);
PxVec3 ra = contact.point - bodyFrame0.p;
PxVec3 rb = contact.point - bodyFrame1.p;
Vec3V targetVel = V3LoadU(contact.targetVel);
const FloatV maxImpulse = FLoad(contact.maxImpulse);
solverContact->scaledBiasX_targetVelocityY_maxImpulseZ = V3Merge(FMax(maxPen, FSub(separation, restDistance)), V3Dot(normalV,targetVel), maxImpulse);
//TODO - should we do cross only in vector land and then store. Could cause a LHS but probably no worse than
//what we already have (probably has a LHS from converting from vector to scalar above)
const PxVec3 raXn = ra.cross(normal);
const PxVec3 rbXn = rb.cross(normal);
Cm::SpatialVector deltaV0, deltaV1;
PxReal unitResponse = getImpulseResponse(b0, Cm::SpatialVector(normal, raXn), deltaV0, d0, angD0,
b1, Cm::SpatialVector(-normal, -rbXn), deltaV1, d1, angD1);
const PxReal vrel = b0.projectVelocity(normal, raXn)
- b1.projectVelocity(normal, rbXn);
solverContact->raXnXYZ_appliedForceW = V4SetW(Vec4V_From_Vec3V(V3LoadU(raXn)), zero);
solverContact->rbXnXYZ_velMultiplierW = V4SetW(Vec4V_From_Vec3V(V3LoadU(rbXn)), zero);
completeContactPoint(*solverContact, unitResponse, vrel, invDt, header->restitution, bounceThreshold);
solverContact->setDeltaVA(deltaV0.linear, deltaV0.angular);
solverContact->setDeltaVB(deltaV1.linear, deltaV1.angular);
}
ptr = p;
}
}
//construct all the frictions
PxU8* PX_RESTRICT ptr2 = workspace;
const PxF32 orthoThreshold = 0.70710678f;
const PxF32 eps = 0.00001f;
bool hasFriction = false;
for(PxU32 i=0;i< frictionPatchCount;i++)
{
const PxU32 contactCount = c.frictionPatchContactCounts[i];
if(contactCount == 0)
continue;
PxcSolverContactCoulombHeader* header = reinterpret_cast<PxcSolverContactCoulombHeader*>(ptr2);
header->frictionOffset = PxU16(ptr - ptr2);
ptr2 += sizeof(PxcSolverContactCoulombHeader) + header->numNormalConstr * pointStride;
PxVec3 normal = c.frictionPatches[i].normal;
const Gu::ContactPoint* contactBase0 = buffer.contacts + c.contactPatches[c.correlationListHeads[i]].start;
const PxReal staticFriction = contactBase0->staticFriction;
const PxU32 disableStrongFriction = contactBase0->internalFaceIndex1 & PxMaterialFlag::eDISABLE_FRICTION;
const bool haveFriction = (disableStrongFriction == 0);
PxcSolverFrictionHeader* frictionHeader = (PxcSolverFrictionHeader*)ptr;
frictionHeader->numNormalConstr = Ps::to8(c.frictionPatchContactCounts[i]);
frictionHeader->numFrictionConstr = Ps::to8(haveFriction ? c.frictionPatches[i].numConstraints : 0);
ptr += sizeof(PxcSolverFrictionHeader);
ptr += frictionHeader->getAppliedForcePaddingSize(c.frictionPatchContactCounts[i]);
Ps::prefetchLine(ptr, 128);
Ps::prefetchLine(ptr, 256);
Ps::prefetchLine(ptr, 384);
const PxVec3 t0Fallback1(0.f, -normal.z, normal.y);
const PxVec3 t0Fallback2(-normal.y, normal.x, 0.f) ;
const PxVec3 tFallback1 = orthoThreshold > PxAbs(normal.x) ? t0Fallback1 : t0Fallback2;
const PxVec3 vrel = b0.getLinVel() - b1.getLinVel();
const PxVec3 t0_ = vrel - normal * (normal.dot(vrel));
const PxReal sqDist = t0_.dot(t0_);
const PxVec3 tDir0 = (sqDist > eps ? t0_: tFallback1).getNormalized();
const PxVec3 tDir1 = tDir0.cross(normal);
PxVec3 tFallback[2] = {tDir0, tDir1};
PxU32 ind = 0;
if(haveFriction)
{
hasFriction = true;
frictionHeader->setStaticFriction(staticFriction);
frictionHeader->setDominance0(n.dominance0);
frictionHeader->setDominance1(n.dominance1);
frictionHeader->angDom0 = angD0;
frictionHeader->angDom1 = angD1;
frictionHeader->type = frictionHeaderType;
PxU32 totalPatchContactCount = 0;
for(PxU32 patch=c.correlationListHeads[i];
patch!=PxcCorrelationBuffer::LIST_END;
patch = c.contactPatches[patch].next)
{
const PxU32 count = c.contactPatches[patch].count;
const PxU32 start = c.contactPatches[patch].start;
const Gu::ContactPoint* contactBase = buffer.contacts + start;
PxU8* p = ptr;
for(PxU32 j =0; j < count; j++)
{
const PxU32 contactId = totalPatchContactCount + j;
const Gu::ContactPoint& contact = contactBase[j];
const PxVec3 ra = contact.point - bodyFrame0.p;
const PxVec3 rb = contact.point - bodyFrame1.p;
for(PxU32 k = 0; k < frictionCountPerPoint; ++k)
{
PxcSolverFrictionExt* PX_RESTRICT f0 = reinterpret_cast<PxcSolverFrictionExt*>(p);
p += frictionStride;
f0->contactIndex = contactId;
PxVec3 t0 = tFallback[ind];
ind = 1 - ind;
PxVec3 raXn = ra.cross(t0);
PxVec3 rbXn = rb.cross(t0);
Cm::SpatialVector deltaV0, deltaV1;
PxReal unitResponse = getImpulseResponse(b0, Cm::SpatialVector(t0, raXn), deltaV0, d0, angD0,
b1, Cm::SpatialVector(-t0, -rbXn), deltaV1, d1, angD1);
f0->setVelMultiplier(FLoad(unitResponse>0.0f ? 1.f/unitResponse : 0.0f));
f0->setRaXn(raXn);
f0->setRbXn(rbXn);
f0->setNormal(t0);
f0->setAppliedForce(0.0f);
f0->setDeltaVA(deltaV0.linear, deltaV0.angular);
f0->setDeltaVB(deltaV1.linear, deltaV1.angular);
}
}
totalPatchContactCount += c.contactPatches[patch].count;
ptr = p;
}
}
}
//PX_ASSERT(ptr - workspace == n.solverConstraintSize);
return hasFriction;
}
bool setupFinalizeExtSolverContactsCoulomb(
const ContactBuffer& buffer,
const CorrelationBuffer& c,
const PxTransform& bodyFrame0,
const PxTransform& bodyFrame1,
PxU8* workspace,
PxReal invDt,
PxReal bounceThresholdF32,
const SolverExtBody& b0,
const SolverExtBody& b1,
PxU32 frictionCountPerPoint,
PxReal invMassScale0, PxReal invInertiaScale0,
PxReal invMassScale1, PxReal invInertiaScale1,
PxReal restDist,
PxReal ccdMaxDistance)
{
// NOTE II: the friction patches are sparse (some of them have no contact patches, and
// therefore did not get written back to the cache) but the patch addresses are dense,
// corresponding to valid patches
const FloatV ccdMaxSeparation = FLoad(ccdMaxDistance);
PxU8* PX_RESTRICT ptr = workspace;
//KS - TODO - this should all be done in SIMD to avoid LHS
const PxF32 maxPenBias0 = b0.mLinkIndex == PxSolverConstraintDesc::NO_LINK ? b0.mBodyData->penBiasClamp : getMaxPenBias(*b0.mFsData)[b0.mLinkIndex];
const PxF32 maxPenBias1 = b1.mLinkIndex == PxSolverConstraintDesc::NO_LINK ? b1.mBodyData->penBiasClamp : getMaxPenBias(*b1.mFsData)[b1.mLinkIndex];
const FloatV maxPenBias = FLoad(PxMax(maxPenBias0, maxPenBias1)/invDt);
const FloatV restDistance = FLoad(restDist);
const FloatV bounceThreshold = FLoad(bounceThresholdF32);
const FloatV invDtV = FLoad(invDt);
const FloatV pt8 = FLoad(0.8f);
const FloatV invDtp8 = FMul(invDtV, pt8);
Ps::prefetchLine(c.contactID);
Ps::prefetchLine(c.contactID, 128);
const PxU32 frictionPatchCount = c.frictionPatchCount;
const PxU32 pointStride = sizeof(SolverContactPointExt);
const PxU32 frictionStride = sizeof(SolverContactFrictionExt);
const PxU8 pointHeaderType = DY_SC_TYPE_EXT_CONTACT;
const PxU8 frictionHeaderType = DY_SC_TYPE_EXT_FRICTION;
PxReal d0 = invMassScale0;
PxReal d1 = invMassScale1;
PxReal angD0 = invInertiaScale0;
PxReal angD1 = invInertiaScale1;
PxU8 flags = 0;
for(PxU32 i=0;i< frictionPatchCount;i++)
{
const PxU32 contactCount = c.frictionPatchContactCounts[i];
if(contactCount == 0)
continue;
const Gu::ContactPoint* contactBase0 = buffer.contacts + c.contactPatches[c.correlationListHeads[i]].start;
const Vec3V normalV = Ps::aos::V3LoadA(contactBase0->normal);
const Vec3V normal = V3LoadA(contactBase0->normal);
const PxReal combinedRestitution = contactBase0->restitution;
SolverContactCoulombHeader* PX_RESTRICT header = reinterpret_cast<SolverContactCoulombHeader*>(ptr);
ptr += sizeof(SolverContactCoulombHeader);
Ps::prefetchLine(ptr, 128);
Ps::prefetchLine(ptr, 256);
Ps::prefetchLine(ptr, 384);
const FloatV restitution = FLoad(combinedRestitution);
header->numNormalConstr = PxU8(contactCount);
header->type = pointHeaderType;
//header->setRestitution(combinedRestitution);
header->setDominance0(d0);
header->setDominance1(d1);
header->angDom0 = angD0;
header->angDom1 = angD1;
header->flags = flags;
header->setNormal(normalV);
for(PxU32 patch=c.correlationListHeads[i];
patch!=CorrelationBuffer::LIST_END;
patch = c.contactPatches[patch].next)
{
const PxU32 count = c.contactPatches[patch].count;
const Gu::ContactPoint* contactBase = buffer.contacts + c.contactPatches[patch].start;
PxU8* p = ptr;
for(PxU32 j=0;j<count;j++)
{
const Gu::ContactPoint& contact = contactBase[j];
SolverContactPointExt* PX_RESTRICT solverContact = reinterpret_cast<SolverContactPointExt*>(p);
p += pointStride;
setupExtSolverContact(b0, b1, d0, d1, angD0, angD1, bodyFrame0, bodyFrame1, normal, invDtV, invDtp8, restDistance, maxPenBias, restitution,
bounceThreshold, contact, *solverContact, ccdMaxSeparation);
}
ptr = p;
}
}
//construct all the frictions
PxU8* PX_RESTRICT ptr2 = workspace;
const PxF32 orthoThreshold = 0.70710678f;
const PxF32 eps = 0.00001f;
bool hasFriction = false;
for(PxU32 i=0;i< frictionPatchCount;i++)
{
const PxU32 contactCount = c.frictionPatchContactCounts[i];
if(contactCount == 0)
continue;
SolverContactCoulombHeader* header = reinterpret_cast<SolverContactCoulombHeader*>(ptr2);
header->frictionOffset = PxU16(ptr - ptr2);
ptr2 += sizeof(SolverContactCoulombHeader) + header->numNormalConstr * pointStride;
const Gu::ContactPoint* contactBase0 = buffer.contacts + c.contactPatches[c.correlationListHeads[i]].start;
PxVec3 normal = contactBase0->normal;
const PxReal staticFriction = contactBase0->staticFriction;
const bool disableStrongFriction = !!(contactBase0->materialFlags & PxMaterialFlag::eDISABLE_FRICTION);
const bool haveFriction = (disableStrongFriction == 0);
SolverFrictionHeader* frictionHeader = reinterpret_cast<SolverFrictionHeader*>(ptr);
frictionHeader->numNormalConstr = Ps::to8(c.frictionPatchContactCounts[i]);
frictionHeader->numFrictionConstr = Ps::to8(haveFriction ? c.frictionPatchContactCounts[i] * frictionCountPerPoint : 0);
frictionHeader->flags = flags;
ptr += sizeof(SolverFrictionHeader);
PxF32* forceBuffer = reinterpret_cast<PxF32*>(ptr);
ptr += frictionHeader->getAppliedForcePaddingSize(c.frictionPatchContactCounts[i]);
PxMemZero(forceBuffer, sizeof(PxF32) * c.frictionPatchContactCounts[i]);
Ps::prefetchLine(ptr, 128);
Ps::prefetchLine(ptr, 256);
Ps::prefetchLine(ptr, 384);
const PxVec3 t0Fallback1(0.f, -normal.z, normal.y);
const PxVec3 t0Fallback2(-normal.y, normal.x, 0.f) ;
const PxVec3 tFallback1 = orthoThreshold > PxAbs(normal.x) ? t0Fallback1 : t0Fallback2;
const PxVec3 vrel = b0.getLinVel() - b1.getLinVel();
const PxVec3 t0_ = vrel - normal * (normal.dot(vrel));
const PxReal sqDist = t0_.dot(t0_);
const PxVec3 tDir0 = (sqDist > eps ? t0_: tFallback1).getNormalized();
const PxVec3 tDir1 = tDir0.cross(normal);
PxVec3 tFallback[2] = {tDir0, tDir1};
PxU32 ind = 0;
if(haveFriction)
{
hasFriction = true;
frictionHeader->setStaticFriction(staticFriction);
frictionHeader->invMass0D0 = d0;
frictionHeader->invMass1D1 = d1;
frictionHeader->angDom0 = angD0;
frictionHeader->angDom1 = angD1;
frictionHeader->type = frictionHeaderType;
PxU32 totalPatchContactCount = 0;
for(PxU32 patch=c.correlationListHeads[i];
patch!=CorrelationBuffer::LIST_END;
patch = c.contactPatches[patch].next)
{
const PxU32 count = c.contactPatches[patch].count;
const PxU32 start = c.contactPatches[patch].start;
const Gu::ContactPoint* contactBase = buffer.contacts + start;
PxU8* p = ptr;
for(PxU32 j =0; j < count; j++)
{
const Gu::ContactPoint& contact = contactBase[j];
const PxVec3 ra = contact.point - bodyFrame0.p;
const PxVec3 rb = contact.point - bodyFrame1.p;
const PxVec3 targetVel = contact.targetVel;
const PxVec3 pVRa = b0.getLinVel() + b0.getAngVel().cross(ra);
const PxVec3 pVRb = b1.getLinVel() + b1.getAngVel().cross(rb);
//const PxVec3 vrel = pVRa - pVRb;
for(PxU32 k = 0; k < frictionCountPerPoint; ++k)
{
SolverContactFrictionExt* PX_RESTRICT f0 = reinterpret_cast<SolverContactFrictionExt*>(p);
p += frictionStride;
PxVec3 t0 = tFallback[ind];
ind = 1 - ind;
PxVec3 raXn = ra.cross(t0);
PxVec3 rbXn = rb.cross(t0);
Cm::SpatialVector deltaV0, deltaV1;
const Cm::SpatialVector resp0 = createImpulseResponseVector(t0, raXn, b0);
const Cm::SpatialVector resp1 = createImpulseResponseVector(-t0, -rbXn, b1);
PxReal unitResponse = getImpulseResponse(b0, resp0, deltaV0, d0, angD0,
b1, resp1, deltaV1, d1, angD1);
PxReal tv = targetVel.dot(t0);
if(b0.mLinkIndex == PxSolverConstraintDesc::NO_LINK)
tv += pVRa.dot(t0);
else if(b1.mLinkIndex == PxSolverConstraintDesc::NO_LINK)
tv -= pVRb.dot(t0);
f0->setVelMultiplier(FLoad(unitResponse>0.0f ? 1.f/unitResponse : 0.0f));
f0->setRaXn(resp0.angular);
f0->setRbXn(-resp1.angular);
f0->targetVel = tv;
f0->setNormal(t0);
f0->setAppliedForce(0.0f);
f0->linDeltaVA = V3LoadA(deltaV0.linear);
f0->angDeltaVA = V3LoadA(deltaV0.angular);
f0->linDeltaVB = V3LoadA(deltaV1.linear);
f0->angDeltaVB = V3LoadA(deltaV1.angular);
}
}
totalPatchContactCount += c.contactPatches[patch].count;
ptr = p;
}
}
}
//PX_ASSERT(ptr - workspace == n.solverConstraintSize);
return hasFriction;
}
void solveFriction_BStatic(const PxcSolverConstraintDesc& desc, PxcSolverContext& /*cache*/)
{
PxcSolverBody& b0 = *desc.bodyA;
Vec3V linVel0 = V3LoadA(b0.linearVelocity);
Vec3V angVel0 = V3LoadA(b0.angularVelocity);
const PxU8* PX_RESTRICT currPtr = desc.constraint;
const PxU8* PX_RESTRICT last = currPtr + getConstraintLength(desc);
//hopefully pointer aliasing doesn't bite.
//PxVec3 l0, a0;
//PxVec3_From_Vec3V(linVel0, l0);
//PxVec3_From_Vec3V(angVel0, a0);
//PX_ASSERT(l0.isFinite());
//PX_ASSERT(a0.isFinite());
while(currPtr < last)
{
const PxcSolverFrictionHeader* PX_RESTRICT frictionHeader = (PxcSolverFrictionHeader*)currPtr;
const PxU32 numFrictionConstr = frictionHeader->numFrictionConstr;
currPtr +=sizeof(PxcSolverFrictionHeader);
PxF32* appliedImpulse = (PxF32*)currPtr;
currPtr +=frictionHeader->getAppliedForcePaddingSize();
PxcSolverFriction* PX_RESTRICT frictions = (PxcSolverFriction*)currPtr;
currPtr += numFrictionConstr * sizeof(PxcSolverFriction);
const FloatV staticFriction = frictionHeader->getStaticFriction();
for(PxU32 i=0;i<numFrictionConstr;i++)
{
PxcSolverFriction& f = frictions[i];
Ps::prefetchLine(&frictions[i+1]);
const Vec3V t0 = Vec3V_From_Vec4V(f.normalXYZ_appliedForceW);
const Vec3V raXt0 = Vec3V_From_Vec4V(f.raXnXYZ_velMultiplierW);
const FloatV appliedForce = V4GetW(f.normalXYZ_appliedForceW);
const FloatV velMultiplier = V4GetW(f.raXnXYZ_velMultiplierW);
const FloatV targetVel = V4GetW(f.rbXnXYZ_targetVelocityW);
//const FloatV normalImpulse = contacts[f.contactIndex].getAppliedForce();
const FloatV normalImpulse = FLoad(appliedImpulse[f.contactIndex]);
const FloatV maxFriction = FMul(staticFriction, normalImpulse);
const FloatV nMaxFriction = FNeg(maxFriction);
//Compute the normal velocity of the constraint.
const FloatV t0Vel1 = V3Dot(t0, linVel0);
const FloatV t0Vel2 = V3Dot(raXt0, angVel0);
//const FloatV unbiasedErr = FMul(targetVel, velMultiplier);
//const FloatV biasedErr = FMulAdd(targetVel, velMultiplier, nScaledBias);
const FloatV t0Vel = FAdd(t0Vel1, t0Vel2);
const Vec3V delAngVel0 = Vec3V_From_Vec4V(f.delAngVel0_InvMassADom);
const Vec3V delLinVel0 = V3Scale(t0, V4GetW(f.delAngVel0_InvMassADom));
// still lots to do here: using loop pipelining we can interweave this code with the
// above - the code here has a lot of stalls that we would thereby eliminate
//FloatV deltaF = FSub(scaledBias, FMul(t0Vel, velMultiplier));//FNeg(FMul(t0Vel, velMultiplier));
//FloatV deltaF = FMul(t0Vel, velMultiplier);
//FloatV newForce = FMulAdd(t0Vel, velMultiplier, appliedForce);
const FloatV tmp = FNegMulSub(targetVel,velMultiplier,appliedForce);
FloatV newForce = FMulAdd(t0Vel, velMultiplier, tmp);
newForce = FClamp(newForce, nMaxFriction, maxFriction);
const FloatV deltaF = FSub(newForce, appliedForce);
linVel0 = V3ScaleAdd(delLinVel0, deltaF, linVel0);
angVel0 = V3ScaleAdd(delAngVel0, deltaF, angVel0);
f.setAppliedForce(newForce);
}
}
//PxVec3_From_Vec3V(linVel0, l0);
//PxVec3_From_Vec3V(angVel0, a0);
//PX_ASSERT(l0.isFinite());
//PX_ASSERT(a0.isFinite());
// Write back
V3StoreU(linVel0, b0.linearVelocity);
V3StoreU(angVel0, b0.angularVelocity);
PX_ASSERT(currPtr == last);
}
void solveContactCoulomb_BStatic(const PxcSolverConstraintDesc& desc, PxcSolverContext& /*cache*/)
{
PxcSolverBody& b0 = *desc.bodyA;
Vec3V linVel0 = V3LoadA(b0.linearVelocity);
Vec3V angVel0 = V3LoadA(b0.angularVelocity);
PxcSolverContactCoulombHeader* firstHeader = (PxcSolverContactCoulombHeader*)desc.constraint;
const PxU8* PX_RESTRICT last = desc.constraint + firstHeader->frictionOffset;//getConstraintLength(desc);
//hopefully pointer aliasing doesn't bite.
const PxU8* PX_RESTRICT currPtr = desc.constraint;
const FloatV zero = FZero();
while(currPtr < last)
{
PxcSolverContactCoulombHeader* PX_RESTRICT hdr = (PxcSolverContactCoulombHeader*)currPtr;
currPtr += sizeof(PxcSolverContactCoulombHeader);
const PxU32 numNormalConstr = hdr->numNormalConstr;
PxcSolverContact* PX_RESTRICT contacts = (PxcSolverContact*)currPtr;
Ps::prefetchLine(contacts);
currPtr += numNormalConstr * sizeof(PxcSolverContact);
PxF32* appliedImpulse = (PxF32*) (((PxU8*)hdr) + hdr->frictionOffset + sizeof(PxcSolverFrictionHeader));
Ps::prefetchLine(appliedImpulse);
const Vec3V normal = hdr->getNormal();
const FloatV invMassDom0 = FLoad(hdr->dominance0);
FloatV normalVel1 = V3Dot(normal, linVel0);
const Vec3V delLinVel0 = V3Scale(normal, invMassDom0);
FloatV accumDeltaF = zero;
//FloatV accumImpulse = zero;
for(PxU32 i=0;i<numNormalConstr;i++)
{
PxcSolverContact& c = contacts[i];
Ps::prefetchLine(&contacts[i+1]);
//const Vec4V normalXYZ_velMultiplierW = c.normalXYZ_velMultiplierW;
const Vec4V raXnXYZ_appliedForceW = c.raXnXYZ_appliedForceW;
const Vec4V rbXnXYZ_velMultiplierW = c.rbXnXYZ_velMultiplierW;
//const Vec3V normal = c.normal;
//const Vec3V normal = Vec3V_From_Vec4V(normalXYZ_velMultiplierW);
const Vec3V raXn = Vec3V_From_Vec4V(raXnXYZ_appliedForceW);
const FloatV appliedForce = V4GetW(raXnXYZ_appliedForceW);
const FloatV velMultiplier = V4GetW(rbXnXYZ_velMultiplierW);
//const FloatV velMultiplier = V4GetW(normalXYZ_velMultiplierW);
const Vec3V delAngVel0 = Vec3V_From_Vec4V(c.delAngVel0_InvMassADom);
const FloatV targetVel = c.getTargetVelocity();
const FloatV nScaledBias = FNeg(c.getScaledBias());
const FloatV maxImpulse = c.getMaxImpulse();
//Compute the normal velocity of the constraint.
//const FloatV normalVel1 = V3Dot(normal, linVel0);
const FloatV normalVel2 = V3Dot(raXn, angVel0);
const FloatV normalVel = FAdd(normalVel1, normalVel2);
//const FloatV unbiasedErr = FMul(targetVel, velMultiplier);
const FloatV biasedErr = FMulAdd(targetVel, velMultiplier, nScaledBias);
// still lots to do here: using loop pipelining we can interweave this code with the
// above - the code here has a lot of stalls that we would thereby eliminate
const FloatV _deltaF = FMax(FNegMulSub(normalVel, velMultiplier, biasedErr), FNeg(appliedForce));
const FloatV _newForce = FAdd(appliedForce, _deltaF);
const FloatV newForce = FMin(_newForce, maxImpulse);
const FloatV deltaF = FSub(newForce, appliedForce);
//linVel0 = V3MulAdd(delLinVel0, deltaF, linVel0);
normalVel1 = FScaleAdd(invMassDom0, deltaF, normalVel1);
angVel0 = V3ScaleAdd(delAngVel0, deltaF, angVel0);
accumDeltaF = FAdd(accumDeltaF, deltaF);
c.setAppliedForce(newForce);
Ps::aos::FStore(newForce, &appliedImpulse[i]);
Ps::prefetchLine(&appliedImpulse[i], 128);
//accumImpulse = FAdd(accumImpulse, newAppliedForce);
}
linVel0 = V3ScaleAdd(delLinVel0, accumDeltaF, linVel0);
//hdr->setAccumlatedForce(accumImpulse);
}
// Write back
V3StoreU(linVel0, b0.linearVelocity);
V3StoreU(angVel0, b0.angularVelocity);
PX_ASSERT(currPtr == last);
}
void setupFinalizeExtSolverContacts(
const ContactPoint* buffer,
const CorrelationBuffer& c,
const PxTransform& bodyFrame0,
const PxTransform& bodyFrame1,
PxU8* workspace,
const SolverExtBody& b0,
const SolverExtBody& b1,
const PxReal invDtF32,
PxReal bounceThresholdF32,
PxReal invMassScale0, PxReal invInertiaScale0,
PxReal invMassScale1, PxReal invInertiaScale1,
const PxReal restDist,
PxU8* frictionDataPtr,
PxReal ccdMaxContactDist)
{
// NOTE II: the friction patches are sparse (some of them have no contact patches, and
// therefore did not get written back to the cache) but the patch addresses are dense,
// corresponding to valid patches
/*const bool haveFriction = PX_IR(n.staticFriction) > 0 || PX_IR(n.dynamicFriction) > 0;*/
const FloatV ccdMaxSeparation = FLoad(ccdMaxContactDist);
PxU8* PX_RESTRICT ptr = workspace;
const FloatV zero=FZero();
//KS - TODO - this should all be done in SIMD to avoid LHS
const PxF32 maxPenBias0 = b0.mLinkIndex == PxSolverConstraintDesc::NO_LINK ? b0.mBodyData->penBiasClamp : getMaxPenBias(*b0.mFsData)[b0.mLinkIndex];
const PxF32 maxPenBias1 = b1.mLinkIndex == PxSolverConstraintDesc::NO_LINK ? b1.mBodyData->penBiasClamp : getMaxPenBias(*b1.mFsData)[b1.mLinkIndex];
const FloatV maxPenBias = FLoad(PxMax(maxPenBias0, maxPenBias1));
const PxReal d0 = invMassScale0;
const PxReal d1 = invMassScale1;
const PxReal angD0 = invInertiaScale0;
const PxReal angD1 = invInertiaScale1;
Vec4V staticFrictionX_dynamicFrictionY_dominance0Z_dominance1W = V4Zero();
staticFrictionX_dynamicFrictionY_dominance0Z_dominance1W=V4SetZ(staticFrictionX_dynamicFrictionY_dominance0Z_dominance1W, FLoad(d0));
staticFrictionX_dynamicFrictionY_dominance0Z_dominance1W=V4SetW(staticFrictionX_dynamicFrictionY_dominance0Z_dominance1W, FLoad(d1));
const FloatV restDistance = FLoad(restDist);
PxU32 frictionPatchWritebackAddrIndex = 0;
PxU32 contactWritebackCount = 0;
Ps::prefetchLine(c.contactID);
Ps::prefetchLine(c.contactID, 128);
const FloatV invDt = FLoad(invDtF32);
const FloatV p8 = FLoad(0.8f);
const FloatV bounceThreshold = FLoad(bounceThresholdF32);
const FloatV invDtp8 = FMul(invDt, p8);
PxU8 flags = 0;
for(PxU32 i=0;i<c.frictionPatchCount;i++)
{
PxU32 contactCount = c.frictionPatchContactCounts[i];
if(contactCount == 0)
continue;
const FrictionPatch& frictionPatch = c.frictionPatches[i];
PX_ASSERT(frictionPatch.anchorCount <= 2); //0==anchorCount is allowed if all the contacts in the manifold have a large offset.
const Gu::ContactPoint* contactBase0 = buffer + c.contactPatches[c.correlationListHeads[i]].start;
const PxReal combinedRestitution = contactBase0->restitution;
const PxReal staticFriction = contactBase0->staticFriction;
const PxReal dynamicFriction = contactBase0->dynamicFriction;
const bool disableStrongFriction = !!(contactBase0->materialFlags & PxMaterialFlag::eDISABLE_FRICTION);
staticFrictionX_dynamicFrictionY_dominance0Z_dominance1W=V4SetX(staticFrictionX_dynamicFrictionY_dominance0Z_dominance1W, FLoad(staticFriction));
staticFrictionX_dynamicFrictionY_dominance0Z_dominance1W=V4SetY(staticFrictionX_dynamicFrictionY_dominance0Z_dominance1W, FLoad(dynamicFriction));
SolverContactHeader* PX_RESTRICT header = reinterpret_cast<SolverContactHeader*>(ptr);
ptr += sizeof(SolverContactHeader);
Ps::prefetchLine(ptr + 128);
Ps::prefetchLine(ptr + 256);
Ps::prefetchLine(ptr + 384);
const bool haveFriction = (disableStrongFriction == 0) ;//PX_IR(n.staticFriction) > 0 || PX_IR(n.dynamicFriction) > 0;
header->numNormalConstr = Ps::to8(contactCount);
header->numFrictionConstr = Ps::to8(haveFriction ? frictionPatch.anchorCount*2 : 0);
header->type = Ps::to8(DY_SC_TYPE_EXT_CONTACT);
header->flags = flags;
const FloatV restitution = FLoad(combinedRestitution);
header->staticFrictionX_dynamicFrictionY_dominance0Z_dominance1W = staticFrictionX_dynamicFrictionY_dominance0Z_dominance1W;
header->angDom0 = angD0;
header->angDom1 = angD1;
const PxU32 pointStride = sizeof(SolverContactPointExt);
const PxU32 frictionStride = sizeof(SolverContactFrictionExt);
const Vec3V normal = V3LoadU(buffer[c.contactPatches[c.correlationListHeads[i]].start].normal);
header->normal = normal;
for(PxU32 patch=c.correlationListHeads[i];
patch!=CorrelationBuffer::LIST_END;
patch = c.contactPatches[patch].next)
{
const PxU32 count = c.contactPatches[patch].count;
const Gu::ContactPoint* contactBase = buffer + c.contactPatches[patch].start;
PxU8* p = ptr;
for(PxU32 j=0;j<count;j++)
{
const Gu::ContactPoint& contact = contactBase[j];
SolverContactPointExt* PX_RESTRICT solverContact = reinterpret_cast<SolverContactPointExt*>(p);
p += pointStride;
setupExtSolverContact(b0, b1, d0, d1, angD0, angD1, bodyFrame0, bodyFrame1, normal, invDt, invDtp8, restDistance, maxPenBias, restitution,
bounceThreshold, contact, *solverContact, ccdMaxSeparation);
}
ptr = p;
}
contactWritebackCount += contactCount;
PxF32* forceBuffer = reinterpret_cast<PxF32*>(ptr);
PxMemZero(forceBuffer, sizeof(PxF32) * contactCount);
ptr += sizeof(PxF32) * ((contactCount + 3) & (~3));
header->broken = 0;
if(haveFriction)
{
//const Vec3V normal = Vec3V_From_PxVec3(buffer.contacts[c.contactPatches[c.correlationListHeads[i]].start].normal);
PxVec3 normalS = buffer[c.contactPatches[c.correlationListHeads[i]].start].normal;
PxVec3 t0, t1;
computeFrictionTangents(b0.getLinVel() - b1.getLinVel(), normalS, t0, t1);
Vec3V vT0 = V3LoadU(t0);
Vec3V vT1 = V3LoadU(t1);
//We want to set the writeBack ptr to point to the broken flag of the friction patch.
//On spu we have a slight problem here because the friction patch array is
//in local store rather than in main memory. The good news is that the address of the friction
//patch array in main memory is stored in the work unit. These two addresses will be equal
//except on spu where one is local store memory and the other is the effective address in main memory.
//Using the value stored in the work unit guarantees that the main memory address is used on all platforms.
PxU8* PX_RESTRICT writeback = frictionDataPtr + frictionPatchWritebackAddrIndex*sizeof(FrictionPatch);
header->frictionBrokenWritebackByte = writeback;
for(PxU32 j = 0; j < frictionPatch.anchorCount; j++)
{
SolverContactFrictionExt* PX_RESTRICT f0 = reinterpret_cast<SolverContactFrictionExt*>(ptr);
ptr += frictionStride;
SolverContactFrictionExt* PX_RESTRICT f1 = reinterpret_cast<SolverContactFrictionExt*>(ptr);
ptr += frictionStride;
PxVec3 ra = bodyFrame0.q.rotate(frictionPatch.body0Anchors[j]);
PxVec3 rb = bodyFrame1.q.rotate(frictionPatch.body1Anchors[j]);
PxVec3 error = (ra + bodyFrame0.p) - (rb + bodyFrame1.p);
{
const PxVec3 raXn = ra.cross(t0);
const PxVec3 rbXn = rb.cross(t0);
Cm::SpatialVector deltaV0, deltaV1;
const Cm::SpatialVector resp0 = createImpulseResponseVector(t0, raXn, b0);
const Cm::SpatialVector resp1 = createImpulseResponseVector(-t1, -rbXn, b1);
FloatV resp = FLoad(getImpulseResponse(b0, resp0, deltaV0, d0, angD0,
b1, resp1, deltaV1, d1, angD1));
const FloatV velMultiplier = FSel(FIsGrtr(resp, zero), FMul(p8, FRecip(resp)), zero);
PxU32 index = c.contactPatches[c.correlationListHeads[i]].start;
PxF32 targetVel = buffer[index].targetVel.dot(t0);
if(b0.mLinkIndex == PxSolverConstraintDesc::NO_LINK)
targetVel -= b0.projectVelocity(t0, raXn);
else if(b1.mLinkIndex == PxSolverConstraintDesc::NO_LINK)
targetVel += b1.projectVelocity(t0, rbXn);
f0->normalXYZ_appliedForceW = V4SetW(vT0, zero);
f0->raXnXYZ_velMultiplierW = V4SetW(V4LoadA(&resp0.angular.x), velMultiplier);
f0->rbXnXYZ_biasW = V4SetW(V4Neg(V4LoadA(&resp1.angular.x)), FLoad(t0.dot(error) * invDtF32));
f0->linDeltaVA = V3LoadA(deltaV0.linear);
f0->angDeltaVA = V3LoadA(deltaV0.angular);
f0->linDeltaVB = V3LoadA(deltaV1.linear);
f0->angDeltaVB = V3LoadA(deltaV1.angular);
f0->targetVel = targetVel;
}
{
const PxVec3 raXn = ra.cross(t1);
const PxVec3 rbXn = rb.cross(t1);
Cm::SpatialVector deltaV0, deltaV1;
const Cm::SpatialVector resp0 = createImpulseResponseVector(t1, raXn, b0);
const Cm::SpatialVector resp1 = createImpulseResponseVector(-t1, -rbXn, b1);
FloatV resp = FLoad(getImpulseResponse(b0, resp0, deltaV0, d0, angD0,
b1, resp1, deltaV1, d1, angD1));
const FloatV velMultiplier = FSel(FIsGrtr(resp, zero), FMul(p8, FRecip(resp)), zero);
PxU32 index = c.contactPatches[c.correlationListHeads[i]].start;
PxF32 targetVel = buffer[index].targetVel.dot(t0);
if(b0.mLinkIndex == PxSolverConstraintDesc::NO_LINK)
targetVel -= b0.projectVelocity(t1, raXn);
else if(b1.mLinkIndex == PxSolverConstraintDesc::NO_LINK)
targetVel += b1.projectVelocity(t1, rbXn);
f1->normalXYZ_appliedForceW = V4SetW(vT1, zero);
f1->raXnXYZ_velMultiplierW = V4SetW(V4LoadA(&resp0.angular.x), velMultiplier);
f1->rbXnXYZ_biasW = V4SetW(V4Neg(V4LoadA(&resp1.angular.x)), FLoad(t1.dot(error) * invDtF32));
f1->linDeltaVA = V3LoadA(deltaV0.linear);
f1->angDeltaVA = V3LoadA(deltaV0.angular);
f1->linDeltaVB = V3LoadA(deltaV1.linear);
f1->angDeltaVB = V3LoadA(deltaV1.angular);
f1->targetVel = targetVel;
}
}
}
frictionPatchWritebackAddrIndex++;
}
}
bool pcmContactCapsuleConvex(GU_CONTACT_METHOD_ARGS)
{
PX_UNUSED(renderOutput);
const PxConvexMeshGeometryLL& shapeConvex = shape1.get<const PxConvexMeshGeometryLL>();
const PxCapsuleGeometry& shapeCapsule = shape0.get<const PxCapsuleGeometry>();
PersistentContactManifold& manifold = cache.getManifold();
Ps::prefetchLine(shapeConvex.hullData);
PX_ASSERT(transform1.q.isSane());
PX_ASSERT(transform0.q.isSane());
const Vec3V zeroV = V3Zero();
const Vec3V vScale = V3LoadU_SafeReadW(shapeConvex.scale.scale); // PT: safe because 'rotation' follows 'scale' in PxMeshScale
const FloatV contactDist = FLoad(params.mContactDistance);
const FloatV capsuleHalfHeight = FLoad(shapeCapsule.halfHeight);
const FloatV capsuleRadius = FLoad(shapeCapsule.radius);
const ConvexHullData* hullData =shapeConvex.hullData;
//Transfer A into the local space of B
const PsTransformV transf0 = loadTransformA(transform0);
const PsTransformV transf1 = loadTransformA(transform1);
const PsTransformV curRTrans(transf1.transformInv(transf0));
const PsMatTransformV aToB(curRTrans);
const FloatV convexMargin = Gu::CalculatePCMConvexMargin(hullData, vScale);
const FloatV capsuleMinMargin = Gu::CalculateCapsuleMinMargin(capsuleRadius);
const FloatV minMargin = FMin(convexMargin, capsuleMinMargin);
const PxU32 initialContacts = manifold.mNumContacts;
const FloatV projectBreakingThreshold = FMul(minMargin, FLoad(1.25f));
const FloatV refreshDist = FAdd(contactDist, capsuleRadius);
manifold.refreshContactPoints(aToB, projectBreakingThreshold, refreshDist);
//ML: after refreshContactPoints, we might lose some contacts
const bool bLostContacts = (manifold.mNumContacts != initialContacts);
GjkStatus status = manifold.mNumContacts > 0 ? GJK_UNDEFINED : GJK_NON_INTERSECT;
Vec3V closestA(zeroV), closestB(zeroV), normal(zeroV); // from a to b
const FloatV zero = FZero();
FloatV penDep = zero;
PX_UNUSED(bLostContacts);
if(bLostContacts || manifold.invalidate_SphereCapsule(curRTrans, minMargin))
{
const bool idtScale = shapeConvex.scale.isIdentity();
manifold.setRelativeTransform(curRTrans);
const QuatV vQuat = QuatVLoadU(&shapeConvex.scale.rotation.x);
ConvexHullV convexHull(hullData, zeroV, vScale, vQuat, idtScale);
convexHull.setMargin(zero);
//transform capsule(a) into the local space of convexHull(b)
CapsuleV capsule(aToB.p, aToB.rotate(V3Scale(V3UnitX(), capsuleHalfHeight)), capsuleRadius);
LocalConvex<CapsuleV> convexA(capsule);
const Vec3V initialSearchDir = V3Sub(capsule.getCenter(), convexHull.getCenter());
if(idtScale)
{
LocalConvex<ConvexHullNoScaleV> convexB(*PX_CONVEX_TO_NOSCALECONVEX(&convexHull));
status = gjkPenetration<LocalConvex<CapsuleV>, LocalConvex<ConvexHullNoScaleV> >(convexA, convexB, initialSearchDir, contactDist, closestA, closestB, normal, penDep,
manifold.mAIndice, manifold.mBIndice, manifold.mNumWarmStartPoints, true);
}
else
{
LocalConvex<ConvexHullV> convexB(convexHull);
status = gjkPenetration<LocalConvex<CapsuleV>, LocalConvex<ConvexHullV> >(convexA, convexB, initialSearchDir, contactDist, closestA, closestB, normal, penDep,
manifold.mAIndice, manifold.mBIndice, manifold.mNumWarmStartPoints, true);
}
Gu::PersistentContact* manifoldContacts = PX_CP_TO_PCP(contactBuffer.contacts);
bool doOverlapTest = false;
if(status == GJK_NON_INTERSECT)
{
return false;
}
else if(status == GJK_DEGENERATE)
{
return fullContactsGenerationCapsuleConvex(capsule, convexHull, aToB, transf0, transf1, manifoldContacts, contactBuffer, idtScale, manifold, normal,
closestB, convexHull.getMargin(), contactDist, true, renderOutput, FLoad(params.mToleranceLength));
}
else
{
const FloatV replaceBreakingThreshold = FMul(minMargin, FLoad(0.05f));
if(status == GJK_CONTACT)
{
const Vec3V localPointA = aToB.transformInv(closestA);//curRTrans.transformInv(closestA);
const Vec4V localNormalPen = V4SetW(Vec4V_From_Vec3V(normal), penDep);
//Add contact to contact stream
manifoldContacts[0].mLocalPointA = localPointA;
manifoldContacts[0].mLocalPointB = closestB;
manifoldContacts[0].mLocalNormalPen = localNormalPen;
//Add contact to manifold
manifold.addManifoldPoint2(localPointA, closestB, localNormalPen, replaceBreakingThreshold);
}
else
{
PX_ASSERT(status == EPA_CONTACT);
if(idtScale)
{
LocalConvex<ConvexHullNoScaleV> convexB(*PX_CONVEX_TO_NOSCALECONVEX(&convexHull));
status= Gu::epaPenetration(convexA, convexB, manifold.mAIndice, manifold.mBIndice, manifold.mNumWarmStartPoints,
closestA, closestB, normal, penDep, true);
}
else
{
LocalConvex<ConvexHullV> convexB(convexHull);
status= Gu::epaPenetration(convexA, convexB, manifold.mAIndice, manifold.mBIndice, manifold.mNumWarmStartPoints,
closestA, closestB, normal, penDep, true);
}
if(status == EPA_CONTACT)
{
const Vec3V localPointA = aToB.transformInv(closestA);//curRTrans.transformInv(closestA);
const Vec4V localNormalPen = V4SetW(Vec4V_From_Vec3V(normal), penDep);
//Add contact to contact stream
manifoldContacts[0].mLocalPointA = localPointA;
manifoldContacts[0].mLocalPointB = closestB;
manifoldContacts[0].mLocalNormalPen = localNormalPen;
//Add contact to manifold
manifold.addManifoldPoint2(localPointA, closestB, localNormalPen, replaceBreakingThreshold);
}
else
{
doOverlapTest = true;
}
}
if(initialContacts == 0 || bLostContacts || doOverlapTest)
{
return fullContactsGenerationCapsuleConvex(capsule, convexHull, aToB, transf0, transf1, manifoldContacts, contactBuffer, idtScale, manifold, normal,
closestB, convexHull.getMargin(), contactDist, doOverlapTest, renderOutput, FLoad(params.mToleranceLength));
}
else
{
//This contact is either come from GJK or EPA
normal = transf1.rotate(normal);
manifold.addManifoldContactsToContactBuffer(contactBuffer, normal, transf0, capsuleRadius, contactDist);
#if PCM_LOW_LEVEL_DEBUG
manifold.drawManifold(*renderOutput, transf0, transf1);
#endif
return true;
}
}
}
else if (manifold.getNumContacts() > 0)
{
normal = manifold.getWorldNormal(transf1);
manifold.addManifoldContactsToContactBuffer(contactBuffer, normal, transf0, capsuleRadius, contactDist);
#if PCM_LOW_LEVEL_DEBUG
manifold.drawManifold(*renderOutput, transf0, transf1);
#endif
return true;
}
return false;
}
void solveFriction_BStatic(const PxSolverConstraintDesc& desc, SolverContext& /*cache*/)
{
PxSolverBody& b0 = *desc.bodyA;
Vec3V linVel0 = V3LoadA(b0.linearVelocity);
Vec3V angState0 = V3LoadA(b0.angularState);
PxU8* PX_RESTRICT currPtr = desc.constraint;
const PxU8* PX_RESTRICT last = currPtr + getConstraintLength(desc);
while(currPtr < last)
{
const SolverFrictionHeader* PX_RESTRICT frictionHeader = reinterpret_cast<SolverFrictionHeader*>(currPtr);
const PxU32 numFrictionConstr = frictionHeader->numFrictionConstr;
const PxU32 numNormalConstr = frictionHeader->numNormalConstr;
const PxU32 numFrictionPerPoint = numFrictionConstr/numNormalConstr;
currPtr +=sizeof(SolverFrictionHeader);
PxF32* appliedImpulse = reinterpret_cast<PxF32*>(currPtr);
currPtr +=frictionHeader->getAppliedForcePaddingSize();
SolverContactFriction* PX_RESTRICT frictions = reinterpret_cast<SolverContactFriction*>(currPtr);
currPtr += numFrictionConstr * sizeof(SolverContactFriction);
const FloatV invMass0 = FLoad(frictionHeader->invMass0D0);
const FloatV angD0 = FLoad(frictionHeader->angDom0);
//const FloatV angD1 = FLoad(frictionHeader->angDom1);
const FloatV staticFriction = frictionHeader->getStaticFriction();
for(PxU32 i=0, j = 0;i<numFrictionConstr;j++)
{
for(PxU32 p = 0; p < numFrictionPerPoint; p++, i++)
{
SolverContactFriction& f = frictions[i];
Ps::prefetchLine(&frictions[i+1]);
const Vec3V t0 = Vec3V_From_Vec4V(f.normalXYZ_appliedForceW);
const Vec3V raXt0 = Vec3V_From_Vec4V(f.raXnXYZ_velMultiplierW);
const FloatV appliedForce = V4GetW(f.normalXYZ_appliedForceW);
const FloatV velMultiplier = V4GetW(f.raXnXYZ_velMultiplierW);
const FloatV targetVel = FLoad(f.targetVel);
//const FloatV normalImpulse = contacts[f.contactIndex].getAppliedForce();
const FloatV normalImpulse = FLoad(appliedImpulse[j]);
const FloatV maxFriction = FMul(staticFriction, normalImpulse);
const FloatV nMaxFriction = FNeg(maxFriction);
//Compute the normal velocity of the constraint.
const FloatV t0Vel1 = V3Dot(t0, linVel0);
const FloatV t0Vel2 = V3Dot(raXt0, angState0);
const FloatV t0Vel = FAdd(t0Vel1, t0Vel2);
const Vec3V delangState0 = V3Scale(raXt0, angD0);
const Vec3V delLinVel0 = V3Scale(t0, invMass0);
// still lots to do here: using loop pipelining we can interweave this code with the
// above - the code here has a lot of stalls that we would thereby eliminate
const FloatV tmp = FNegScaleSub(targetVel,velMultiplier,appliedForce);
FloatV newForce = FScaleAdd(t0Vel, velMultiplier, tmp);
newForce = FClamp(newForce, nMaxFriction, maxFriction);
const FloatV deltaF = FSub(newForce, appliedForce);
linVel0 = V3ScaleAdd(delLinVel0, deltaF, linVel0);
angState0 = V3ScaleAdd(delangState0, deltaF, angState0);
f.setAppliedForce(newForce);
}
}
}
// Write back
V3StoreA(linVel0, b0.linearVelocity);
V3StoreA(angState0, b0.angularState);
PX_ASSERT(currPtr == last);
}