void PhysXHeightfield::InitHeightfield(PxPhysics* physics, PxScene* scene, const char* filename)
{
float xScale = 0.0025f;
float yScale = 0.0025f;
float zScale = 10.00f;
// NOTE: Assuming that heightfield texture has B8G8R8A8 format.
if(LoadHeightfield(filename))
{
PxU16 nbColumns = PxU16(mHeightfield.width);
PxU16 nbRows = PxU16(mHeightfield.height);
PxHeightFieldDesc heightFieldDesc;
heightFieldDesc.format = PxHeightFieldFormat::eS16_TM;
heightFieldDesc.nbColumns = nbColumns;
heightFieldDesc.nbRows = nbRows;
heightFieldDesc.samples.data = mHeightfield.data;
heightFieldDesc.samples.stride = sizeof(PxHeightFieldSample);
//heightFieldDesc.convexEdgeThreshold = 0;
PxHeightField* heightField = physics->createHeightField(heightFieldDesc);
// create shape for heightfield
PxTransform pose(PxVec3(-((PxReal)nbRows*yScale) / 2.0f,
0.0f,
-((PxReal)nbColumns*xScale) / 2.0f),
PxQuat::createIdentity());
// PxTransform pose = PxTransform::createIdentity();
pose.p = PxVec3(-((nbColumns/2)*xScale),0.0,-((nbColumns/2)*xScale));
PxRigidActor* hf = physics->createRigidStatic(pose);
if(!hf)
return;
const PxMaterial* mMat = physics->createMaterial(0.9f, 0.9f, 0.001f);
//PxShape* shape = hf->createShape((PxHeightFieldGeometry(heightField, PxMeshGeometryFlags(), yScale, xScale, xScale)), *mMat);
//PxHeightFieldGeometry hfGeom(heightField, PxMeshGeometryFlags(), heightScale, rowScale, colScale);
//PxShape* aHeightFieldShape = aHeightFieldActor->createShape(hfGeom, aMaterialArray, nbMaterials);
PxHeightFieldGeometry hfGeom(heightField, PxMeshGeometryFlags(), yScale, xScale, xScale);
PxShape* hfShape = hf->createShape(hfGeom, *mMat);
if(!hfShape)
return;
//shape->setFlag(PxShapeFlag::ePARTICLE_DRAIN, false);
//shape->setFlag(PxShapeFlag::eSIMULATION_SHAPE, true);
//shape->setFlag(PxShapeFlag::eUSE_SWEPT_BOUNDS, true);
// add actor to the scene
scene->addActor(*hf);
}
}
bool copyStaticProperties(PxRigidActor& to, const PxRigidActor& from,NxMirrorScene::MirrorFilter &mirrorFilter)
{
physx::shdfnd::InlineArray<PxShape*, 64> shapes;
shapes.resize(from.getNbShapes());
PxU32 shapeCount = from.getNbShapes();
from.getShapes(shapes.begin(), shapeCount);
physx::shdfnd::InlineArray<PxMaterial*, 64> materials;
for(PxU32 i = 0; i < shapeCount; i++)
{
PxShape* s = shapes[i];
if ( mirrorFilter.shouldMirror(*s) )
{
PxU32 materialCount = s->getNbMaterials();
materials.resize(materialCount);
s->getMaterials(materials.begin(), materialCount);
PxShape* shape = to.createShape(s->getGeometry().any(), materials.begin(), static_cast<physx::PxU16>(materialCount));
shape->setLocalPose( s->getLocalPose());
shape->setContactOffset(s->getContactOffset());
shape->setRestOffset(s->getRestOffset());
shape->setFlags(s->getFlags());
shape->setSimulationFilterData(s->getSimulationFilterData());
shape->setQueryFilterData(s->getQueryFilterData());
mirrorFilter.reviseMirrorShape(*shape);
}
}
to.setActorFlags(from.getActorFlags());
to.setOwnerClient(from.getOwnerClient());
to.setDominanceGroup(from.getDominanceGroup());
if ( to.getNbShapes() )
{
mirrorFilter.reviseMirrorActor(to);
}
return to.getNbShapes() != 0;
}
void SampleParticles::loadTerrain(const char* path, PxReal xScale, PxReal yScale, PxReal zScale)
{
SampleFramework::SampleAsset* asset = getAsset(terrain_hf, SampleFramework::SampleAsset::ASSET_TEXTURE);
mManagedAssets.push_back(asset);
PX_ASSERT(asset->getType() == SampleFramework::SampleAsset::ASSET_TEXTURE);
SampleFramework::SampleTextureAsset* texAsset = static_cast<SampleFramework::SampleTextureAsset*>(asset);
SampleRenderer::RendererTexture2D* heightfieldTexture = texAsset->getTexture();
// NOTE: Assuming that heightfield texture has B8G8R8A8 format.
if(heightfieldTexture)
{
PxU16 nbColumns = PxU16(heightfieldTexture->getWidth());
PxU16 nbRows = PxU16(heightfieldTexture->getHeight());
PxHeightFieldDesc heightFieldDesc;
heightFieldDesc.nbColumns = nbColumns;
heightFieldDesc.nbRows = nbRows;
PxU32* samplesData = (PxU32*)SAMPLE_ALLOC(sizeof(PxU32) * nbColumns * nbRows);
heightFieldDesc.samples.data = samplesData;
heightFieldDesc.samples.stride = sizeof(PxU32);
heightFieldDesc.convexEdgeThreshold = 0;
PxU8* currentByte = (PxU8*)heightFieldDesc.samples.data;
PxU32 texturePitch = 0;
PxU8* loaderPtr = static_cast<PxU8*>(heightfieldTexture->lockLevel(0, texturePitch));
PxVec3Alloc* verticesA = SAMPLE_NEW(PxVec3Alloc)[nbRows * nbColumns];
PxVec3* vertices = verticesA;
PxReal* UVs = (PxReal*)SAMPLE_ALLOC(sizeof(PxReal) * nbRows * nbColumns * 2);
for (PxU32 row = 0; row < nbRows; row++)
{
for (PxU32 column = 0; column < nbColumns; column++)
{
PxHeightFieldSample* currentSample = (PxHeightFieldSample*)currentByte;
currentSample->height = *loaderPtr;
vertices[row * nbColumns + column] =
PxVec3(PxReal(row) * xScale,
PxReal(currentSample->height * zScale),
PxReal(column) * yScale);
UVs[2 * (row * nbColumns + column)] = (PxReal(row) / PxReal(nbRows)) * 7.0f;
UVs[2 * (row * nbColumns + column) + 1] = (PxReal(column) / PxReal(nbColumns)) * 7.0f;
currentSample->materialIndex0 = 0;
currentSample->materialIndex1 = 0;
currentSample->clearTessFlag();
currentByte += heightFieldDesc.samples.stride;
loaderPtr += 4 * sizeof(PxU8);
}
}
PxHeightField* heightField = getPhysics().createHeightField(heightFieldDesc);
// free allocated memory for heightfield samples description
SAMPLE_FREE(samplesData);
// create shape for heightfield
PxTransform pose(PxVec3(-((PxReal)nbRows*yScale) / 2.0f,
0.0f,
-((PxReal)nbColumns*xScale) / 2.0f),
PxQuat::createIdentity());
PxRigidActor* hf = getPhysics().createRigidStatic(pose);
runtimeAssert(hf, "PxPhysics::createRigidStatic returned NULL\n");
PxShape* shape = hf->createShape(PxHeightFieldGeometry(heightField, PxMeshGeometryFlags(), zScale, xScale, yScale), getDefaultMaterial());
runtimeAssert(shape, "PxRigidActor::createShape returned NULL\n");
shape->setFlag(PxShapeFlag::ePARTICLE_DRAIN, false);
shape->setFlag(PxShapeFlag::eSIMULATION_SHAPE, true);
// add actor to the scene
getActiveScene().addActor(*hf);
mPhysicsActors.push_back(hf);
// create indices and UVs
PxU32* indices = (PxU32*)SAMPLE_ALLOC(sizeof(PxU32) * (nbColumns - 1) * (nbRows - 1) * 3 * 2);
for(int i = 0; i < (nbColumns - 1); ++i)
{
for(int j = 0; j < (nbRows - 1); ++j)
{
// first triangle
indices[6 * (i * (nbRows - 1) + j) + 0] = (i + 1) * nbRows + j;
indices[6 * (i * (nbRows - 1) + j) + 1] = i * nbRows + j;
indices[6 * (i * (nbRows - 1) + j) + 2] = i * nbRows + j + 1;
// second triangle
indices[6 * (i * (nbRows - 1) + j) + 3] = (i + 1) * nbRows + j + 1;
indices[6 * (i * (nbRows - 1) + j) + 4] = (i + 1) * nbRows + j;
indices[6 * (i * (nbRows - 1) + j) + 5] = i * nbRows + j + 1;
}
}
// add mesh to renderer
RAWMesh data;
data.mName = "terrain";
data.mTransform = PxTransform::createIdentity();
data.mNbVerts = nbColumns * nbRows;
data.mVerts = (PxVec3*)vertices;
data.mVertexNormals = NULL;
data.mUVs = UVs;
data.mMaterialID = MATERIAL_HEIGHTFIELD;
data.mNbFaces = (nbColumns - 1) * (nbRows - 1) * 2;
data.mIndices = indices;
RenderMeshActor* hf_mesh = createRenderMeshFromRawMesh(data);
hf_mesh->setPhysicsShape(shape);
SAMPLE_FREE(indices);
SAMPLE_FREE(UVs);
DELETEARRAY(verticesA);
}
else
{
char errMsg[256];
physx::string::sprintf_s(errMsg, 256, "Couldn't load %s\n", path);
fatalError(errMsg);
}
}
// Creates an physics entity from an entity info structure and a starting transform
void PhysicsEngine::createEntity(PhysicsEntity* entity, PhysicsEntityInfo* info, PxTransform transform)
{
transform.p.y += info->yPosOffset;
// Set static/dynamic info for actor depending on its type
PxRigidActor* actor;
if (info->type == PhysicsType::DYNAMIC)
{
DynamicInfo* dInfo = info->dynamicInfo;
PxRigidDynamic* dynamicActor = physics->createRigidDynamic(transform);
dynamicActor->setLinearDamping(dInfo->linearDamping);
dynamicActor->setAngularDamping(dInfo->angularDamping);
dynamicActor->setMaxAngularVelocity(dInfo->maxAngularVelocity);
actor = dynamicActor;
}
else if (info->type == PhysicsType::STATIC)
{
PxRigidStatic* staticActor = physics->createRigidStatic(transform);
actor = staticActor;
}
// All shapes in actor
for (auto sInfo : info->shapeInfo)
{
// Create material and geometry for shape and add it to actor
PxGeometry* geometry;
PxMaterial* material;
if (sInfo->geometry == Geometry::SPHERE)
{
SphereInfo* sphInfo = (SphereInfo*)sInfo;
geometry = new PxSphereGeometry(sphInfo->radius);
}
else if (sInfo->geometry == Geometry::BOX)
{
BoxInfo* boxInfo = (BoxInfo*)sInfo;
geometry = new PxBoxGeometry(boxInfo->halfX, boxInfo->halfY, boxInfo->halfZ);
}
else if (sInfo->geometry == Geometry::CAPSULE)
{
CapsuleInfo* capInfo = (CapsuleInfo*)sInfo;
geometry = new PxCapsuleGeometry(capInfo->radius, capInfo->halfHeight);
}
else if (sInfo->geometry == Geometry::CONVEX_MESH)
{
ConvexMeshInfo* cmInfo = (ConvexMeshInfo*)sInfo;
PxConvexMesh* mesh = helper->createConvexMesh(cmInfo->verts.data(), cmInfo->verts.size());
geometry = new PxConvexMeshGeometry(mesh);
}
// Not working until index drawing is set up
else if (sInfo->geometry == Geometry::TRIANGLE_MESH)
{
TriangleMeshInfo* tmInfo = (TriangleMeshInfo*)sInfo;
PxTriangleMesh* mesh = helper->createTriangleMesh(tmInfo->verts.data(), tmInfo->verts.size(), tmInfo->faces.data(), tmInfo->faces.size()/3);
geometry = new PxTriangleMeshGeometry(mesh);
}
material = (sInfo->isDrivable) ? drivingSurfaces[0] : physics->createMaterial(sInfo->dynamicFriction, sInfo->staticFriction, sInfo->restitution);
PxShape* shape = actor->createShape(*geometry, *material); // TODO support shape flags
shape->setLocalPose(sInfo->transform);
material->release();
delete geometry;
// Set up querry filter data for shape
PxFilterData qryFilterData;
qryFilterData.word3 = (sInfo->isDrivable) ? (PxU32)Surface::DRIVABLE : (PxU32)Surface::UNDRIVABLE;
shape->setQueryFilterData(qryFilterData);
// Set up simulation filter data for shape
PxFilterData simFilterData;
simFilterData.word0 = (PxU32)sInfo->filterFlag0;
simFilterData.word1 = (PxU32)sInfo->filterFlag1;
simFilterData.word2 = (PxU32)sInfo->filterFlag2;
simFilterData.word3 = (PxU32)sInfo->filterFlag3;
shape->setSimulationFilterData(simFilterData);
if (info->type == PhysicsType::DYNAMIC)
{
DynamicInfo* dInfo = info->dynamicInfo;
PxRigidBodyExt::updateMassAndInertia(*(PxRigidBody*)actor, dInfo->density, &dInfo->cmOffset);
PxRigidBody* body = (PxRigidBody*)actor;
}
}
// Add actor to scene, set actor for entity, and set user data for actor. Creates one to one between entities and phyX
scene->addActor(*actor);
entity->setActor(actor);
actor->userData = entity;
}
PxRigidActor* SampleSubmarine::loadTerrain(const char* name, const PxReal heightScale, const PxReal rowScale, const PxReal columnScale)
{
PxRigidActor* heightFieldActor = NULL;
BmpLoader loader;
if(loader.loadBmp(getSampleMediaFilename(name)))
{
PxU16 nbColumns = PxU16(loader.mWidth), nbRows = PxU16(loader.mHeight);
PxHeightFieldDesc heightFieldDesc;
heightFieldDesc.nbColumns = nbColumns;
heightFieldDesc.nbRows = nbRows;
PxU32* samplesData = (PxU32*)SAMPLE_ALLOC(sizeof(PxU32)*nbColumns * nbRows);
heightFieldDesc.samples.data = samplesData;
heightFieldDesc.samples.stride = sizeof(PxU32);
PxU8* currentByte = (PxU8*)heightFieldDesc.samples.data;
PxU8* loader_ptr = loader.mRGB;
PxVec3Alloc* vertexesA = SAMPLE_NEW(PxVec3Alloc)[nbRows * nbColumns];
PxF32* uvs = (PxF32*)SAMPLE_ALLOC(sizeof(PxF32) * nbRows * nbColumns * 2);
PxVec3* vertexes = vertexesA;
for (PxU32 row = 0; row < nbRows; row++)
{
for (PxU32 column = 0; column < nbColumns; column++)
{
PxHeightFieldSample* currentSample = (PxHeightFieldSample*)currentByte;
currentSample->height = *loader_ptr;
vertexes[row * nbColumns + column] = PxVec3(PxReal(row)*rowScale,
PxReal(currentSample->height * heightScale),
PxReal(column)*columnScale);
uvs[(row * nbColumns + column)*2 + 0] = (float)column/7.0f;
uvs[(row * nbColumns + column)*2 + 1] = (float)row/7.0f;
currentSample->materialIndex0 = 0;
currentSample->materialIndex1 = 0;
currentSample->clearTessFlag();
currentByte += heightFieldDesc.samples.stride;
loader_ptr += 3 * sizeof(PxU8);
}
}
PxHeightField* heightField = getPhysics().createHeightField(heightFieldDesc);
if(!heightField) fatalError("createHeightField failed!");
// create shape for heightfield
PxTransform pose(PxVec3(-((PxReal)nbRows*rowScale) / 2.0f,
0.0f,
-((PxReal)nbColumns*columnScale) / 2.0f),
PxQuat::createIdentity());
heightFieldActor = getPhysics().createRigidStatic(pose);
if(!heightFieldActor) fatalError("createRigidStatic failed!");
PxShape* shape = heightFieldActor->createShape(PxHeightFieldGeometry(heightField, PxMeshGeometryFlags(), heightScale, rowScale, columnScale), getDefaultMaterial());
if(!shape) fatalError("createShape failed!");
// add actor to the scene
getActiveScene().addActor(*heightFieldActor);
// create indices
PxU32* indices = (PxU32*)SAMPLE_ALLOC(sizeof(PxU32)*((nbColumns - 1) * (nbRows - 1) * 3 * 2));
for(int i = 0; i < (nbColumns - 1); ++i)
{
for(int j = 0; j < (nbRows - 1); ++j)
{
// first triangle
indices[6 * (i * (nbRows - 1) + j) + 0] = (i + 1) * nbRows + j;
indices[6 * (i * (nbRows - 1) + j) + 1] = i * nbRows + j;
indices[6 * (i * (nbRows - 1) + j) + 2] = i * nbRows + j + 1;
// second triangle
indices[6 * (i * (nbRows - 1) + j) + 3] = (i + 1) * nbRows + j + 1;
indices[6 * (i * (nbRows - 1) + j) + 4] = (i + 1) * nbRows + j;
indices[6 * (i * (nbRows - 1) + j) + 5] = i * nbRows + j + 1;
}
}
// add mesh to renderer
RAWMesh data;
data.mName = name;
data.mTransform = PxTransform::createIdentity();
data.mNbVerts = nbColumns * nbRows;
data.mVerts = vertexes;
data.mVertexNormals = NULL;
data.mUVs = uvs;
data.mMaterialID = MATERIAL_TERRAIN_MUD;
data.mNbFaces = (nbColumns - 1) * (nbRows - 1) * 2;
data.mIndices = indices;
RenderMeshActor* hf_mesh = createRenderMeshFromRawMesh(data);
if(!hf_mesh) fatalError("createRenderMeshFromRawMesh failed!");
hf_mesh->setPhysicsShape(shape);
shape->setFlag(PxShapeFlag::eVISUALIZATION, false);
SAMPLE_FREE(indices);
SAMPLE_FREE(uvs);
DELETEARRAY(vertexesA);
SAMPLE_FREE(samplesData);
}
return heightFieldActor;
}