static void CreatePhysicsTerrain()
{
if(gTerrainData!=NULL)
{
delete gTerrainData;
gTerrainData=NULL;
}
gTerrainData = new TerrainData;
gTerrainData->init(TERRAIN_SIZE, TERRAIN_OFFSET, TERRAIN_WIDTH, TERRAIN_CHAOS);
// Build physical model
NxTriangleMeshDesc terrainDesc;
terrainDesc.numVertices = gTerrainData->nbVerts;
terrainDesc.numTriangles = gTerrainData->nbFaces;
terrainDesc.pointStrideBytes = sizeof(NxVec3);
terrainDesc.triangleStrideBytes = 3*sizeof(NxU32);
terrainDesc.points = gTerrainData->verts;
terrainDesc.triangles = gTerrainData->faces;
terrainDesc.flags = 0;
terrainDesc.heightFieldVerticalAxis = NX_Y;
terrainDesc.heightFieldVerticalExtent = -1000.0f;
bool status = InitCooking();
if (!status) {
printf("Unable to initialize the cooking library. Please make sure that you have correctly installed the latest version of the NVIDIA PhysX SDK.");
exit(1);
}
MemoryWriteBuffer buf;
status = CookTriangleMesh(terrainDesc, buf);
if (!status) {
printf("Unable to cook a triangle mesh.");
exit(1);
}
MemoryReadBuffer readBuffer(buf.data);
terrainMesh = gPhysicsSDK->createTriangleMesh(readBuffer);
//
// Please note about the created Triangle Mesh, user needs to release it when no one uses it to save memory. It can be detected
// by API "meshData->getReferenceCount() == 0". And, the release API is "gPhysicsSDK->releaseTriangleMesh(*meshData);"
//
NxTriangleMeshShapeDesc terrainShapeDesc;
terrainShapeDesc.meshData = terrainMesh;
terrainShapeDesc.shapeFlags = NX_SF_FEATURE_INDICES;
NxActorDesc ActorDesc;
ActorDesc.shapes.pushBack(&terrainShapeDesc);
gTerrain = gScene->createActor(ActorDesc);
gTerrain->userData = (void*)0;
CloseCooking();
}
//------------------------------------------------------------------------------------
// Constructor
//------------------------------------------------------------------------------------
TileTerrainShapeX::TileTerrainShapeX( PhysXManager *pMan , sn::TileTerrain* terrain )
{
gPhAllocator = new UserAllocator();
NxU32* ii = terrain->GetIndices();
NxTriangleMeshDesc terrainDesc;
terrainDesc.numVertices = terrain->GetVertexCount();
terrainDesc.numTriangles = terrain->GetIndexesCount() / 3;
terrainDesc.pointStrideBytes = sizeof(gfx::Vertex3);
terrainDesc.triangleStrideBytes = 3*sizeof(NxU32);
terrainDesc.points = terrain->GetPositions();
terrainDesc.triangles = ii;
terrainDesc.flags = 0;
terrainDesc.heightFieldVerticalAxis = NX_Y;
terrainDesc.heightFieldVerticalExtent = -1000.0f;
bool status = InitCooking(/*gPhAllocator, &gPhErrorStream*/);
if (!status)
kge::io::Logger::Log("Unable to initialize the cooking library. Please make sure that you have correctly installed the latest version of the AGEIA PhysX SDK.");
MemoryWriteBuffer buf;
status = CookTriangleMesh(terrainDesc, buf);
if (!status)
printf("Unable to cook a triangle mesh.");
MemoryReadBuffer readBuffer(buf.data);
terrainMesh = pMan->getPhysxSDK()->createTriangleMesh(readBuffer);
NxTriangleMeshShapeDesc terrainShapeDesc;
terrainShapeDesc.meshData = terrainMesh;
terrainShapeDesc.shapeFlags = NX_SF_FEATURE_INDICES;
NxActorDesc ActorDesc;
ActorDesc.shapes.pushBack(&terrainShapeDesc);
gLocalActor = pMan->getPhysxScene()->createActor(ActorDesc);
gLocalActor->userData = (void*)0;
CloseCooking();
} // Constructor
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();
}
