void LoadLumberYardMesh(DemoEntityManager* const scene, const dVector& location, int shapeid)
{
DemoEntity* const entity = DemoEntity::LoadNGD_mesh ("lumber.ngd", scene->GetNewton(), scene->GetShaderCache());
dTree<NewtonCollision*, DemoMesh*> filter;
NewtonWorld* const world = scene->GetNewton();
dFloat density = 15.0f;
int defaultMaterialID = NewtonMaterialGetDefaultGroupID(scene->GetNewton());
for (DemoEntity* child = entity->GetFirst(); child; child = child->GetNext()) {
DemoMesh* const mesh = (DemoMesh*)child->GetMesh();
if (mesh) {
dAssert(mesh->IsType(DemoMesh::GetRttiType()));
dTree<NewtonCollision*, DemoMesh*>::dTreeNode* node = filter.Find(mesh);
if (!node) {
// make a collision shape only for and instance
dFloat* const array = mesh->m_vertex;
dVector minBox(1.0e10f, 1.0e10f, 1.0e10f, 1.0f);
dVector maxBox(-1.0e10f, -1.0e10f, -1.0e10f, 1.0f);
for (int i = 0; i < mesh->m_vertexCount; i++) {
dVector p(array[i * 3 + 0], array[i * 3 + 1], array[i * 3 + 2], 1.0f);
minBox.m_x = dMin(p.m_x, minBox.m_x);
minBox.m_y = dMin(p.m_y, minBox.m_y);
minBox.m_z = dMin(p.m_z, minBox.m_z);
maxBox.m_x = dMax(p.m_x, maxBox.m_x);
maxBox.m_y = dMax(p.m_y, maxBox.m_y);
maxBox.m_z = dMax(p.m_z, maxBox.m_z);
}
dVector size(maxBox - minBox);
dMatrix offset(dGetIdentityMatrix());
offset.m_posit = (maxBox + minBox).Scale(0.5f);
NewtonCollision* const shape = NewtonCreateBox(world, size.m_x, size.m_y, size.m_z, shapeid, &offset[0][0]);
node = filter.Insert(shape, mesh);
}
// create a body and add to the world
NewtonCollision* const shape = node->GetInfo();
dMatrix matrix(child->GetMeshMatrix() * child->CalculateGlobalMatrix());
matrix.m_posit += location;
dFloat mass = density * NewtonConvexCollisionCalculateVolume(shape);
CreateSimpleSolid(scene, mesh, mass, matrix, shape, defaultMaterialID);
}
}
// destroy all shapes
while (filter.GetRoot()) {
NewtonCollision* const shape = filter.GetRoot()->GetInfo();
NewtonDestroyCollision(shape);
filter.Remove(filter.GetRoot());
}
delete entity;
}
NewtonCollision* CreateCollisionTree (NewtonWorld* world, DemoEntity* const entity, int materialID, bool optimize)
{
// measure the time to build a collision tree
unsigned64 timer0 = dGetTimeInMicrosenconds();
// create the collision tree geometry
NewtonCollision* collision = NewtonCreateTreeCollision(world, materialID);
// set the application level callback
#ifdef USE_STATIC_MESHES_DEBUG_COLLISION
NewtonStaticCollisionSetDebugCallback (collision, ShowMeshCollidingFaces);
#endif
// prepare to create collision geometry
NewtonTreeCollisionBeginBuild(collision);
// iterate the entire geometry an build the collision
for (DemoEntity* model = entity->GetFirst(); model; model = model->GetNext()) {
dMatrix matrix (model->GetMeshMatrix() * model->CalculateGlobalMatrix(entity));
DemoMesh* const mesh = (DemoMesh*)model->GetMesh();
dAssert (mesh->IsType(DemoMesh::GetRttiType()));
dFloat* const vertex = mesh->m_vertex;
for (DemoMesh::dListNode* nodes = mesh->GetFirst(); nodes; nodes = nodes->GetNext()) {
DemoSubMesh& segment = nodes->GetInfo();
int matID = segment.m_textureHandle;
for (int i = 0; i < segment.m_indexCount; i += 3) {
int index;
dVector face[3];
index = segment.m_indexes[i + 0] * 3;
face[0] = dVector (vertex[index + 0], vertex[index + 1], vertex[index + 2]);
index = segment.m_indexes[i + 1] * 3;
face[1] = dVector (vertex[index + 0], vertex[index + 1], vertex[index + 2]);
index = segment.m_indexes[i + 2] * 3;
face[2] = dVector (vertex[index + 0], vertex[index + 1], vertex[index + 2]);
matrix.TransformTriplex (&face[0].m_x, sizeof (dVector), &face[0].m_x, sizeof (dVector), 3);
// use material ids as physics materials
NewtonTreeCollisionAddFace(collision, 3, &face[0].m_x, sizeof (dVector), matID);
}
}
}
NewtonTreeCollisionEndBuild(collision, optimize ? 1 : 0);
// test Serialization
#if 0
FILE* file = fopen ("serialize.bin", "wb");
NewtonCollisionSerialize (world, collision, DemoEntityManager::SerializeFile, file);
fclose (file);
NewtonDestroyCollision (collision);
file = fopen ("serialize.bin", "rb");
collision = NewtonCreateCollisionFromSerialization (world, DemoEntityManager::DeserializeFile, file);
fclose (file);
#endif
// measure the time to build a collision tree
timer0 = (dGetTimeInMicrosenconds() - timer0) / 1000;
return collision;
}