//-------------------------------------------------------------------------------------------------
bool sdPhysicsSystem::CreateEmptyScene(uint uiSize)
{
NIASSERT(!m_pkScene);
NIASSERT(!m_pkControllerManager);
float fSize = (float)uiSize;
float fWalkHeight = 4000.f;
NxBounds3 nxBound;
nxBound.setCenterExtents(NxVec3(fSize * 0.5f, fSize * 0.5f, 0.f), NxVec3(fSize * 0.5f, fSize * 0.5f, fWalkHeight *0.5f));
NxSceneDesc nxSceneDesc;
nxSceneDesc.gravity = NxVec3(0.f, 0.f, -9.8f);
nxSceneDesc.simType = NX_SIMULATION_SW;
nxSceneDesc.maxBounds = &nxBound;
nxSceneDesc.upAxis = 2; ///< Z up
nxSceneDesc.bpType = NX_BP_TYPE_SAP_MULTI;
nxSceneDesc.nbGridCellsX = 8u;
nxSceneDesc.nbGridCellsY = 8u;
nxSceneDesc.subdivisionLevel = 5;
m_pkScene = m_pkPhysicsSDK->createScene(nxSceneDesc);
NIASSERT(m_pkScene);
m_pkControllerManager = NxCreateControllerManager(m_pkAllocator);
NIASSERT(m_pkControllerManager);
return true;
}
// ----------------------------------------------------------------------
void ObjMesh::getTriangleBounds(int i, NxBounds3 &bounds) const
{
const ObjMeshTriangle &mt = mTriangles[i];
bounds.setEmpty();
bounds.include(mVertices[mt.vertexNr[0]]);
bounds.include(mVertices[mt.vertexNr[1]]);
bounds.include(mVertices[mt.vertexNr[2]]);
}
void CCTDebugData::addAABB(const NxBounds3& bounds, NxU32 color, bool renderFrame)
{
// Reuse OBB code...
NxVec3 center; bounds.getCenter(center);
NxVec3 extents; bounds.getExtents(extents);
NxMat33 id; id.id();
addOBB(NxBox(center, extents, id), color, renderFrame);
}
void CCTDebugData::addAABB(const NxExtendedBounds3& bounds, NxU32 color)
{
NxExtendedVec3 center;
NxVec3 extents;
bounds.getCenter(center);
bounds.getExtents(extents);
NxBounds3 tmp;
tmp.setCenterExtents(NxVec3((float)center.x, (float)center.y, (float)center.z), extents);
addAABB(tmp, color, false);
}
static void CreateCube(const NxVec3& pos, const NxVec3 * vel = 0)
{
// Avoid creating one compound within another
NxBounds3 bounds;
bounds.setCenterExtents(pos, NxVec3(10.0f, 10.0f, 10.0f));
if(gScene->checkOverlapAABB(bounds))
return;
// Create cube made up of 6 individual boxes as its faces, with each box having a different material
NxActorDesc actorDesc;
NxBodyDesc bodyDesc;
bodyDesc.linearVelocity.set(0,5,0);
if (vel)
bodyDesc.linearVelocity += *vel;
bodyDesc.angularVelocity.set(NxMath::rand(0.0f,10.0f),NxMath::rand(0.0f,10.0f),NxMath::rand(0.0f,10.0f)); //throw up the ball with a random initial angular vel as if to roll dice.
NxBoxShapeDesc boxDesc[6];
boxDesc[0].dimensions.set(4,4,1);
boxDesc[0].localPose.t.set(0,0,4);
boxDesc[0].materialIndex = defaultMaterialIndex;
actorDesc.shapes.pushBack(&boxDesc[0]);
boxDesc[1].dimensions.set(4,4,1);
boxDesc[1].localPose.t.set(0,0,-4);
boxDesc[1].materialIndex = somewhatBouncyMaterialIndex;
actorDesc.shapes.pushBack(&boxDesc[1]);
boxDesc[2].dimensions.set(4,1,4);
boxDesc[2].localPose.t.set(0,4,0);
boxDesc[3].materialIndex = veryBouncyMaterialIndex;
actorDesc.shapes.pushBack(&boxDesc[2]);
boxDesc[3].dimensions.set(4,1,4);
boxDesc[3].localPose.t.set(0,-4,0);
boxDesc[3].materialIndex = defaultMaterialIndex;
actorDesc.shapes.pushBack(&boxDesc[3]);
boxDesc[4].dimensions.set(1,4,4);
boxDesc[4].localPose.t.set(4,0,0);
boxDesc[4].materialIndex = frictionlessMaterialIndex;
actorDesc.shapes.pushBack(&boxDesc[4]);
boxDesc[5].dimensions.set(1,4,4);
boxDesc[5].localPose.t.set(-4,0,0);
boxDesc[5].materialIndex = highFrictionMaterialIndex;
actorDesc.shapes.pushBack(&boxDesc[5]);
actorDesc.body = &bodyDesc;
actorDesc.density = 10.0f;
actorDesc.globalPose.t = pos;
gScene->createActor(actorDesc);
}
//-----------------------------------------------------------------------------
// GetWorldBounds
//-----------------------------------------------------------------------------
NxBounds3 CPhysicObj::GetWorldBounds (void) const
{
assert( m_bActivated );
int nNumParts = GetNumParts();
// NOTA: Siempre tendremos que tener al menos 1 parte.
NxBounds3 result = GetWorldBounds (0);
// El resto de bounds los combinamos con el resultado
for (int i = 1; i < nNumParts; i++)
{
result.combine (GetWorldBounds(i));
}
return result;
}
static bool SweepBoxMesh(const SweepTest* sweep_test, const SweptVolume* volume, const TouchedGeom* geom, const NxExtendedVec3& center, const NxVec3& dir, SweptContact& impact)
{
ASSERT(volume->GetType()==SWEPT_BOX);
ASSERT(geom->mType==TOUCHED_MESH);
const SweptBox* SB = static_cast<const SweptBox*>(volume);
const TouchedMesh* TM = static_cast<const TouchedMesh*>(geom);
NxU32 NbTris = TM->mNbTris;
if(!NbTris) return false;
// Fetch triangle data for current mesh (the stream may contain triangles from multiple meshes)
const NxTriangle* T = &sweep_test->mWorldTriangles[TM->mIndexWorldTriangles];
const NxTriangle* ET = &sweep_test->mWorldEdgeNormals[TM->mIndexWorldEdgeNormals];
const NxU32* EdgeFlags = &sweep_test->mEdgeFlags[TM->mIndexEdgeFlags];
NxBounds3 Box;
Box.setCenterExtents(NxVec3(float(center.x - TM->mOffset.x), float(center.y - TM->mOffset.y), float(center.z - TM->mOffset.z)), SB->mExtents); // Precompute
// PT: this only really works when the CCT collides with a single mesh, but that's the most common case. When it doesn't, there's just no speedup but it still works.
NxU32 CachedIndex = sweep_test->mCachedTriIndex[sweep_test->mCachedTriIndexIndex];
if(CachedIndex>=NbTris) CachedIndex=0;
NxVec3 Hit, Normal;
float t;
NxU32 Index;
if(gUtilLib->NxSweepBoxTriangles(NbTris, T, ET, EdgeFlags, Box, dir, impact.mDistance, Hit, Normal, t, Index, &CachedIndex))
{
if(t>=impact.mDistance) return false;
impact.mDistance = t;
impact.mWorldNormal = Normal;
impact.mWorldPos.x = Hit.x + TM->mOffset.x;
impact.mWorldPos.y = Hit.y + TM->mOffset.y;
impact.mWorldPos.z = Hit.z + TM->mOffset.z;
// Returned index is only between 0 and NbTris, i.e. it indexes the array of cached triangles, not the original mesh.
assert(Index<NbTris);
sweep_test->mCachedTriIndex[sweep_test->mCachedTriIndexIndex] = Index;
// The CCT loop will use the index from the start of the cache...
impact.mIndex = Index + TM->mIndexWorldTriangles;
return true;
}
return false;
}
Box3F PxBody::getWorldBounds()
{
AssertFatal( mActor, "PxBody::getTransform - The actor is null!" );
NxBounds3 bounds;
bounds.setEmpty();
NxBounds3 shapeBounds;
NxShape *const* pShapeArray = mActor->getShapes();
U32 shapeCount = mActor->getNbShapes();
for ( U32 i = 0; i < shapeCount; i++ )
{
// Get the shape's bounds.
pShapeArray[i]->getWorldBounds( shapeBounds );
// Combine them into the total bounds.
bounds.combine( shapeBounds );
}
return pxCast<Box3F>( bounds );
}
//-----------------------------------------------------------------------------
// GetWorldBounds
//-----------------------------------------------------------------------------
NxBounds3 CPhysicObj::GetWorldBounds (int nPartIdx) const
{
assert( m_bActivated && (nPartIdx < GetNumParts()) );
const NxActor* pActor = GetActor(nPartIdx);
// Combinamos los bounds de todas las shapes
NxBounds3 result;
NxBounds3 shapeBounds;
uint nNumShapes = pActor->getNbShapes();
assert( nNumShapes > 0 );
NxShape* const* pShapes = pActor->getShapes();
pShapes[0]->getWorldBounds(result);
for (uint i = 1; i < nNumShapes; i++)
{
pShapes[0]->getWorldBounds (shapeBounds);
result.combine (shapeBounds);
}
return result;
}
//-----------------------------------------------------------------------------
// CalcBBox
//-----------------------------------------------------------------------------
NxBox CPhysicModelSimple::CalcBBox (void) const
{
NxBounds3 bounds;
for (int i = 0; i < (int)m_ActorDesc.shapes.size(); i++)
{
NxShapeDesc* pShapeDesc = m_ActorDesc.shapes[i];
switch (pShapeDesc->getType())
{
case NX_SHAPE_BOX:
{
NxBoxShapeDesc* pBoxShape = (NxBoxShapeDesc*) pShapeDesc;
NxBox shapeBBox (pBoxShape->localPose.t, pBoxShape->dimensions, pBoxShape->localPose.M);
NxBounds3 shapeBounds;
shapeBounds.boundsOfOBB( shapeBBox.rot, shapeBBox.center, shapeBBox.extents );
bounds.combine (shapeBounds);
}
break;
case NX_SHAPE_SPHERE:
{
NxSphereShapeDesc* pSphereShape = (NxSphereShapeDesc*) pShapeDesc;
NxBox shapeBBox (pSphereShape->localPose.t, NxVec3(pSphereShape->radius), pSphereShape->localPose.M);
NxBounds3 shapeBounds;
shapeBounds.boundsOfOBB( shapeBBox.rot, shapeBBox.center, shapeBBox.extents );
bounds.combine (shapeBounds);
}
break;
default:
// Caso no soportado
assert(0);
break;
}
}
NxBox result;
bounds.getCenter (result.center);
bounds.getExtents (result.extents);
return result;
}
// -----------------------------------------------------------------------
// compute the links between the surface mesh and tetrahedras
void ObjMesh::buildTetraLinks(const NxVec3 *vertices, const NxU32 *indices, const NxU32 numTets)
{
if(!mTetraLinks.empty())
return;
mTetraLinks.clear();
MeshHash* hash = new MeshHash();
// hash tetrahedra for faster search
hash->setGridSpacing(mBounds.min.distance(mBounds.max) * 0.1f);
for (NxU32 i = 0; i < numTets; i++) {
const NxU32 *ix = &indices[4*i];
NxBounds3 tetraBounds;
tetraBounds.setEmpty();
tetraBounds.include(vertices[*ix++]);
tetraBounds.include(vertices[*ix++]);
tetraBounds.include(vertices[*ix++]);
tetraBounds.include(vertices[*ix++]);
hash->add(tetraBounds, i);
}
for (NxU32 i = 0; i < mVertices.size(); i++) {
// prepare datastructure for drained tetras
mDrainedTriVertices.push_back(false);
ObjMeshTetraLink tmpLink;
NxVec3 triVert = mVertices[i];
std::vector<int> itemIndices;
hash->queryUnique(triVert, itemIndices);
NxReal minDist = 0.0f;
NxVec3 b;
int num, isize;
num = isize = itemIndices.size();
if (num == 0) num = numTets;
for (int i = 0; i < num; i++) {
int j = i;
if (isize > 0) j = itemIndices[i];
const NxU32 *ix = &indices[j*4];
const NxVec3 &p0 = vertices[*ix++];
const NxVec3 &p1 = vertices[*ix++];
const NxVec3 &p2 = vertices[*ix++];
const NxVec3 &p3 = vertices[*ix++];
NxVec3 b = computeBaryCoords(triVert, p0, p1, p2, p3);
// is the vertex inside the tetrahedron? If yes we take it
if (b.x >= 0.0f && b.y >= 0.0f && b.z >= 0.0f && (b.x + b.y + b.z) <= 1.0f) {
tmpLink.barycentricCoords = b;
tmpLink.tetraNr = j;
break;
}
// otherwise, if we are not in any tetrahedron we take the closest one
NxReal dist = 0.0f;
if (b.x + b.y + b.z > 1.0f) dist = b.x + b.y + b.z - 1.0f;
if (b.x < 0.0f) dist = (-b.x < dist) ? dist : -b.x;
if (b.y < 0.0f) dist = (-b.y < dist) ? dist : -b.y;
if (b.z < 0.0f) dist = (-b.z < dist) ? dist : -b.z;
if (i == 0 || dist < minDist) {
minDist = dist;
tmpLink.barycentricCoords = b;
tmpLink.tetraNr = j;
}
}
mTetraLinks.push_back(tmpLink);
}
delete hash;
}
void Update()
{
NxMat34 mat34;
NxMat33 mat;
NxQuat quat(0.0f,NxVec3(0,1,0));
mat.fromQuat(quat);
NxBox worldBox;
worldBox.extents = NxVec3(2, 2, 2);
worldBox.rot = mat;
NxSphere worldSphere;
NxBounds3 worldBounds;
NxCapsule worldCapsule;
worldCapsule.radius = 2.0f;
NxU32 nbPlanes = 2;
NxPlane worldPlanes[2];
worldPlanes[0].set(NxVec3(-2,0,2), NxVec3(0,0,1));
worldPlanes[1].set(NxVec3(-2,0,2), NxVec3(1,0,0));
NxU32 nbDynamicShapes = gScene->getNbDynamicShapes();
NxU32 nbStaticShapes = gScene->getNbStaticShapes();
NxU32 nbShapes = 0;
NxShapesType type;
int i = 0;
for (i = 0; i < 3; ++ i)
{
if (i == 0)
{
nbShapes = nbDynamicShapes;
type = NX_DYNAMIC_SHAPES;
switch(gOverlapType)
{
case OVERLAP_AABB:
case OVERLAP_CHECK_AABB:
worldBounds.set(gMIN, gMAX);
break;
case OVERLAP_OBB:
case OVERLAP_CHECK_OBB:
worldBox.center = gBoxCenter;
break;
case OVERLAP_CAPSULE:
case OVERLAP_CHECK_CAPSULE:
worldCapsule = NxCapsule(gCapsuleSegment, gCapsuleRadius);
break;
case OVERLAP_SPHERE:
case OVERLAP_CHECK_SPHERE:
worldSphere = NxSphere(gSphereCenter, gSphereRadius);
break;
}
}
else if (i == 1)
{
nbShapes = nbStaticShapes;
type = NX_STATIC_SHAPES;
switch(gOverlapType)
{
case OVERLAP_AABB:
case OVERLAP_CHECK_AABB:
worldBounds.set(gMIN+NxVec3(-6.0f,0,0),gMAX+NxVec3(-6.0f,0,0));
break;
case OVERLAP_OBB:
case OVERLAP_CHECK_OBB:
worldBox.center = gBoxCenter+NxVec3(-6,0,0);
break;
case OVERLAP_CAPSULE:
case OVERLAP_CHECK_CAPSULE:
worldCapsule.p0.x = gCapsuleSegment.p0.x - 6.0f;
worldCapsule.p1.x = gCapsuleSegment.p1.x - 6.0f;
break;
case OVERLAP_SPHERE:
case OVERLAP_CHECK_SPHERE:
worldSphere = NxSphere(gSphereCenter + NxVec3(-6,0,0), gSphereRadius);
break;
}
}
else if (i == 2)
{
nbShapes = nbStaticShapes + nbDynamicShapes;
type = NX_ALL_SHAPES;
switch(gOverlapType)
{
case OVERLAP_AABB:
case OVERLAP_CHECK_AABB:
worldBounds.set(gMIN+NxVec3(6.0f,0,0),gMAX+NxVec3(6.0f,0,0));
break;
case OVERLAP_OBB:
case OVERLAP_CHECK_OBB:
worldBox.center = gBoxCenter+NxVec3(6,0,0);
break;
case OVERLAP_CAPSULE:
case OVERLAP_CHECK_CAPSULE:
worldCapsule.p0.x = gCapsuleSegment.p0.x + 6.0f;
worldCapsule.p1.x = gCapsuleSegment.p1.x + 6.0f;
break;
case OVERLAP_SPHERE:
case OVERLAP_CHECK_SPHERE:
worldSphere = NxSphere(gSphereCenter + NxVec3(6,0,0), gSphereRadius);
break;
}
}
NxShape** shapes = (NxShape**)NxAlloca(nbShapes*sizeof(NxShape*));
for (NxU32 j = 0; j < nbShapes; j++) shapes[j] = NULL;
NxU32 activeGroups = 0xffffffff;
NxGroupsMask* groupsMask = NULL;
bool bResult = true;
float linewidth = 1.0f;
switch(gOverlapType)
{
case OVERLAP_AABB:
gScene->overlapAABBShapes(worldBounds, type, nbShapes, shapes, &gShapeReport, activeGroups, groupsMask, true);
NxCreateBox(worldBox, worldBounds, mat34);
DrawWireBox(worldBox, NxVec3(1,0,0), linewidth);
break;
case OVERLAP_CHECK_AABB:
bResult = gScene->checkOverlapAABB(worldBounds, type, activeGroups, groupsMask);
NxCreateBox(worldBox, worldBounds, mat34);
if (bResult == true)
DrawWireBox(worldBox, NxVec3(1,0,0), linewidth);
else
DrawWireBox(worldBox, NxVec3(0,1,0), linewidth);
break;
case OVERLAP_OBB:
gScene->overlapOBBShapes(worldBox, type, nbShapes, shapes, &gShapeReport, activeGroups, groupsMask);
DrawWireBox(worldBox, NxVec3(1,0,0), linewidth);
break;
case OVERLAP_CHECK_OBB:
if (gScene->checkOverlapOBB(worldBox, type, activeGroups, groupsMask) == true)
DrawWireBox(worldBox, NxVec3(1,0,0), linewidth);
else
DrawWireBox(worldBox, NxVec3(0,1,0), linewidth);
break;
case OVERLAP_CAPSULE:
gScene->overlapCapsuleShapes(worldCapsule, type, nbShapes, shapes, &gShapeReport, activeGroups, groupsMask);
DrawWireCapsule(worldCapsule, NxVec3(1,0,0));
break;
case OVERLAP_CHECK_CAPSULE:
if (gScene->checkOverlapCapsule(worldCapsule, type,activeGroups, groupsMask) == true)
DrawWireCapsule(worldCapsule, NxVec3(1,0,0));
else
DrawWireCapsule(worldCapsule, NxVec3(0,1,0));
break;
case OVERLAP_SPHERE:
gScene->overlapSphereShapes(worldSphere, type, nbShapes, shapes, &gShapeReport, activeGroups, groupsMask);
DrawWireSphere(&worldSphere, NxVec3(1,0,0));
break;
case OVERLAP_CHECK_SPHERE:
if (gScene->checkOverlapSphere(worldSphere, type,activeGroups, groupsMask) == true)
DrawWireSphere(&worldSphere, NxVec3(1,0,0));
else
DrawWireSphere(&worldSphere, NxVec3(0,1,0));
break;
case OVERLAP_CULL:
gScene->cullShapes(nbPlanes, worldPlanes, type, nbShapes, shapes, &gShapeReport, activeGroups, groupsMask);
DrawLine(NxVec3(-20,0,2), NxVec3(-2,0,2),NxVec3(1,0,0), linewidth);
DrawLine(NxVec3(-2,0,-20), NxVec3(-2,0,2),NxVec3(1,0,0), linewidth);
break;
}
}
}
// -----------------------------------------------------------------------
void MyCloth::draw(bool shadows)
{
static NxU32 numVertices = mNumVertices;
NxU32 numElements = mNumIndices;
numVertices = mNumVertices;
// Disable pressure if tearing occurs
if (mTeared && (mCloth->getFlags() & NX_CLF_PRESSURE))
{
// Disable Pressure
mCloth->setFlags(mCloth->getFlags() & ~NX_CLF_PRESSURE);
mCloth->setPressure(0);
// Reduce tearing factor
NxReal oldTearing = mCloth->getTearFactor();
oldTearing = (oldTearing - 1) / 3 + 1;
mCloth->setTearFactor(oldTearing);
// Reduce bending stiffness
if (mCloth->getBendingStiffness() > 0.9f)
mCloth->setBendingStiffness(0.2f);
// Apply explosion in the middle of the cloth
NxBounds3 bounds;
mCloth->getWorldBounds(bounds);
NxVec3 center;
bounds.getCenter(center);
NxReal radius = bounds.min.distance(bounds.max);
mCloth->addForceAtPos(center, 7 * NxMath::pow(radius,3), radius, NX_IMPULSE);
printf("Pressure disabled\n");
}
if (mTexId > 0)
{
updateTextureCoordinates();
}
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_NORMAL_ARRAY);
glVertexPointer(3, GL_FLOAT, sizeof(RenderBufferVertexElement), numVertices, &(mVertexRenderBuffer[0].position.x));
glNormalPointer(GL_FLOAT, sizeof(RenderBufferVertexElement), numVertices, &(mVertexRenderBuffer[0].normal.x));
if (mTexId) {
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glTexCoordPointer(2, GL_FLOAT, sizeof(RenderBufferVertexElement), numVertices, &(mVertexRenderBuffer[0].texCoord[0]));
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, mTexId);
glColor4f(1.0f, 1.0f, 1.0f,1.0f);
}
#ifdef __CELLOS_LV2__
glDrawRangeElements(GL_TRIANGLES, 0, numVertices-1, numElements, GL_UNSIGNED_INT, mIndexRenderBuffer);
#else
glDrawElements(GL_TRIANGLES, numElements, GL_UNSIGNED_INT, mIndexRenderBuffer);
#endif
if (mTexId) {
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glDisable(GL_TEXTURE_2D);
}
if (shadows) {
const static float ShadowMat[]={ 1,0,0,0, 0,0,0,0, 0,0,1,0, 0,0,0,1 };
glPushMatrix();
glMultMatrixf(ShadowMat);
glDisable(GL_LIGHTING);
glColor4f(0.05f, 0.1f, 0.15f,1.0f);
#ifdef __CELLOS_LV2__
glDrawRangeElements(GL_TRIANGLES, 0, numVertices-1, numElements, GL_UNSIGNED_INT, mIndexRenderBuffer);
#else
glDrawElements(GL_TRIANGLES, numElements, GL_UNSIGNED_INT, mIndexRenderBuffer);
#endif
glColor4f(1.0f, 1.0f, 1.0f,1.0f);
glEnable(GL_LIGHTING);
glPopMatrix();
}
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_NORMAL_ARRAY);
}
void SampleCollision::setup()
{
SetTitleString(getName());
#ifdef __PPCGEKKO__
SetHelpString(" a: create rigid bodies");
#else
SetHelpString(" b: create rigid bodies");
#endif
gShadows = false;
// Create objects in the scene
if (!InitCooking(gAllocator, &gErrorStream))
{
printf("\nError: Unable to initialize the cooking library, exiting the sample.\n\n");
return;
}
// Load ASE file
CookASE("fluidSample.ase", gScene, NxVec3(1,10,0));
CookASE("coolFlow.ase", gScene, NxVec3(1,6,-0), NxVec3(1,0.2,1));
CloseCooking();
// Add a box shaped drain.
NxActorDesc boxDrainActor;
NxBoxShapeDesc boxDrainShape;
boxDrainActor.shapes.pushBack(&boxDrainShape);
boxDrainShape.dimensions.set(40,1,40);
boxDrainShape.shapeFlags |= NX_SF_FLUID_DRAIN;
boxDrainActor.globalPose.t.set(0, 0, 0);
gScene->createActor(boxDrainActor);
//Pre cook hotspots
NxBounds3 precookAABB;
precookAABB.set(NxVec3(-20,-20,-20), NxVec3(20,20,20));
// gScene->cookFluidMeshHotspot(precookAABB, PACKET_SIZE_MULTIPLIER, REST_PARTICLES_PER_METER, KERNEL_RADIUS_MULTIPLIER, MOTION_LIMIT_MULTIPLIER, COLLISION_DISTANCE_MULTIPLIER );
//Create a set of initial particles
ParticleSDK* initParticles = new ParticleSDK[MAX_PARTICLES];
unsigned initParticlesNum = 0;
NxVec3 fluidPos(0, 11.6, 0);
float distance = 0.1f;
unsigned sideNum = 16;
float rad = sideNum*distance*0.5f;
for (unsigned i=0; i<sideNum; i++)
for (unsigned j=0; j<sideNum; j++)
for (unsigned k=0; k<sideNum; k++)
{
NxVec3 p = NxVec3(i*distance,j*distance,k*distance);
if (p.distance(NxVec3(rad,rad,rad)) < rad)
{
p += fluidPos;
ParticleSDK& newParticle = initParticles[initParticlesNum++];
newParticle.position = p;
newParticle.velocity = NxVec3(0,0,0);
}
}
//Setup structure to pass initial particles.
NxParticleData initParticleData;
initParticleData.numParticlesPtr = &initParticlesNum;
initParticleData.bufferPos = &initParticles[0].position.x;
initParticleData.bufferPosByteStride = sizeof(ParticleSDK);
initParticleData.bufferVel = &initParticles[0].velocity.x;
initParticleData.bufferVelByteStride = sizeof(ParticleSDK);
//Setup fluid descriptor
NxFluidDesc fluidDesc;
fluidDesc.maxParticles = initParticlesNum;
fluidDesc.kernelRadiusMultiplier = KERNEL_RADIUS_MULTIPLIER;
fluidDesc.restParticlesPerMeter = REST_PARTICLES_PER_METER;
fluidDesc.collisionDistanceMultiplier = COLLISION_DISTANCE_MULTIPLIER;
fluidDesc.stiffness = 50.0f;
fluidDesc.viscosity = 22.0f;
fluidDesc.damping = 0.0f;
fluidDesc.restitutionForStaticShapes = 0.4f;
fluidDesc.dynamicFrictionForStaticShapes = 0.03f;
fluidDesc.simulationMethod = NX_F_SPH; //NX_F_NO_PARTICLE_INTERACTION;
if (!gHardwareSimulation)
fluidDesc.flags &= ~NX_FF_HARDWARE;
fluidDesc.initialParticleData = initParticleData;
//Create user fluid.
//- create NxFluid in NxScene
//- setup the buffers to read from data from the SDK
//- set NxFluid::userData field to MyFluid instance
bool trackUserData = false;
bool provideCollisionNormals = false;
MyFluid* fluid = new MyFluid(gScene, fluidDesc, trackUserData, provideCollisionNormals, NxVec3(0.2f,0.3f,0.7f), 0.03f);
assert(fluid);
gMyFluids.pushBack(fluid);
delete[] initParticles;
gCameraPos.set(23, 14, 23);
gCameraForward = fluidPos - NxVec3(0, 3, 0) - gCameraPos;
gCameraForward.normalize();
}
// to attach to tetra mesh
void TetraMeshHelper::buildTetraLinks(const NxSoftBodyMeshDesc& desc)
{
const NxVec3 *vertices = (const NxVec3 *) desc.vertices;
const void *tetIndices = desc.tetrahedra;
bool is32Bits = !(desc.flags & NX_SOFTBODY_MESH_16_BIT_INDICES);
const NxU32 numTets = desc.numTetrahedra;
mTetraLinks.clear();
MeshHash* hash = new MeshHash();
// hash tetrahedra for faster search
hash->setGridSpacing(mBounds.min.distance(mBounds.max) * 0.1f);
NxU8* startIndex = (NxU8*) tetIndices;
if(is32Bits)
{
for (NxU32 i = 0; i < numTets; i++) {
const NxU32 *ix = ((NxU32*) startIndex) + 4*i;
NxBounds3 tetraBounds;
tetraBounds.setEmpty();
tetraBounds.include(vertices[*ix++]);
tetraBounds.include(vertices[*ix++]);
tetraBounds.include(vertices[*ix++]);
tetraBounds.include(vertices[*ix++]);
hash->add(tetraBounds, i);
}
for (NxU32 i = 0; i < maxMesh.numVerts; i++)
{
MeshTetraLink tmpLink;
NxVec3 triVert(maxMesh.verts[i].x, maxMesh.verts[i].y, maxMesh.verts[i].z);
std::vector<int> itemIndices;
hash->queryUnique(triVert, itemIndices);
NxReal minDist = 0.0f;
NxVec3 b;
int num, isize;
num = isize = itemIndices.size();
if (num == 0) num = numTets;
for (int i = 0; i < num; i++) {
int j = i;
if (isize > 0) j = itemIndices[i];
const NxU32 *ix = ((NxU32*) startIndex) + 4*j;
const NxVec3 &p0 = vertices[*ix++];
const NxVec3 &p1 = vertices[*ix++];
const NxVec3 &p2 = vertices[*ix++];
const NxVec3 &p3 = vertices[*ix++];
NxVec3 b = computeBaryCoords(triVert, p0, p1, p2, p3);
// is the vertex inside the tetrahedron? If yes we take it
if (b.x >= 0.0f && b.y >= 0.0f && b.z >= 0.0f && (b.x + b.y + b.z) <= 1.0f) {
tmpLink.barycentricCoords = b;
tmpLink.tetraNr = j;
break;
}
// otherwise, if we are not in any tetrahedron we take the closest one
NxReal dist = 0.0f;
if (b.x + b.y + b.z > 1.0f) dist = b.x + b.y + b.z - 1.0f;
if (b.x < 0.0f) dist = (-b.x < dist) ? dist : -b.x;
if (b.y < 0.0f) dist = (-b.y < dist) ? dist : -b.y;
if (b.z < 0.0f) dist = (-b.z < dist) ? dist : -b.z;
if (i == 0 || dist < minDist) {
minDist = dist;
tmpLink.barycentricCoords = b;
tmpLink.tetraNr = j;
}
}
mTetraLinks.push_back(tmpLink);
}
}
else
{
for (NxU32 i = 0; i < numTets; i++) {
const NxU16 *ix = ((NxU16*) startIndex) + 4*i;
NxBounds3 tetraBounds;
tetraBounds.setEmpty();
tetraBounds.include(vertices[*ix++]);
tetraBounds.include(vertices[*ix++]);
tetraBounds.include(vertices[*ix++]);
tetraBounds.include(vertices[*ix++]);
hash->add(tetraBounds, i);
}
for (NxU32 i = 0; i < maxMesh.numVerts; i++)
{
MeshTetraLink tmpLink;
NxVec3 triVert(maxMesh.verts[i].x, maxMesh.verts[i].y, maxMesh.verts[i].z);
std::vector<int> itemIndices;
hash->queryUnique(triVert, itemIndices);
NxReal minDist = 0.0f;
NxVec3 b;
int num, isize;
num = isize = itemIndices.size();
if (num == 0) num = numTets;
for (int i = 0; i < num; i++) {
int j = i;
if (isize > 0) j = itemIndices[i];
const NxU16 *ix = ((NxU16*) startIndex) + 4*j;
const NxVec3 &p0 = vertices[*ix++];
const NxVec3 &p1 = vertices[*ix++];
const NxVec3 &p2 = vertices[*ix++];
const NxVec3 &p3 = vertices[*ix++];
NxVec3 b = computeBaryCoords(triVert, p0, p1, p2, p3);
// is the vertex inside the tetrahedron? If yes we take it
if (b.x >= 0.0f && b.y >= 0.0f && b.z >= 0.0f && (b.x + b.y + b.z) <= 1.0f) {
tmpLink.barycentricCoords = b;
tmpLink.tetraNr = j;
break;
}
// otherwise, if we are not in any tetrahedron we take the closest one
NxReal dist = 0.0f;
if (b.x + b.y + b.z > 1.0f) dist = b.x + b.y + b.z - 1.0f;
if (b.x < 0.0f) dist = (-b.x < dist) ? dist : -b.x;
if (b.y < 0.0f) dist = (-b.y < dist) ? dist : -b.y;
if (b.z < 0.0f) dist = (-b.z < dist) ? dist : -b.z;
if (i == 0 || dist < minDist) {
minDist = dist;
tmpLink.barycentricCoords = b;
tmpLink.tetraNr = j;
}
}
mTetraLinks.push_back(tmpLink);
}
}
delete hash;
}
bool UpdateCharacterExtents(NxU32 index, bool& increase)
{
if(index&1)
{
NxBoxController* c = static_cast<NxBoxController*>(gManager->getController(index));
NxVec3 extents = c->getExtents();
NxF32 inc = 1.0f;
NxExtendedVec3 pos = GetCharacterPos(index);
if (increase)
{
extents.y += inc;
pos.y += inc;
}
else
{
extents.y -= inc;
pos.y -= inc;
}
if(1)
{
NxBounds3 worldBounds;
worldBounds.setCenterExtents(NxVec3(pos.x, pos.y, pos.z), extents);
c->setCollision(false); // Avoid checking overlap with ourself
bool Status = gScene->checkOverlapAABB(worldBounds);
c->setCollision(true);
if(Status)
{
printf("Can not resize box!\n");
return false;
}
}
increase = !increase; // Increase or decrease height each time we're called
// WARNING: the SDK currently doesn't check for collisions when changing extents, so if you're close
// to a wall you might end up penetrating it. In some cases you might also fall through the level.
// A more advanced implementation will take care of that later.
c->setPosition(pos);
return c->setExtents(extents);
}
else
{
NxCapsuleController* c = static_cast<NxCapsuleController*>(gManager->getController(index));
NxF32 height = c->getHeight();
NxF32 radius = c->getRadius();
NxF32 inc = 1.0f;
NxExtendedVec3 pos = GetCharacterPos(index);
if (increase)
{
height += inc;
pos.y += inc*0.5f;
}
else
{
height -= inc;
pos.y -= inc*0.5f;
}
if(1)
{
NxCapsule worldCapsule;
worldCapsule.p0.x = worldCapsule.p1.x = pos.x;
worldCapsule.p0.y = worldCapsule.p1.y = pos.y;
worldCapsule.p0.z = worldCapsule.p1.z = pos.z;
worldCapsule.p0.y -= height*0.5f;
worldCapsule.p1.y += height*0.5f;
worldCapsule.radius = radius;
c->setCollision(false); // Avoid checking overlap with ourself
bool Status = gScene->checkOverlapCapsule(worldCapsule);
c->setCollision(true);
if(Status)
{
printf("Can not resize capsule!\n");
return false;
}
}
increase = !increase; // Increase or decrease height each time we're called
// WARNING: the SDK currently doesn't check for collisions when changing height, so if you're close
// to a wall you might end up penetrating it. In some cases you might also fall through the level.
// A more advanced implementation will take care of that later.
c->setPosition(NxExtendedVec3(pos.x, pos.y, pos.z));
return c->setHeight(height);
}
}