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Code Issues Releases Wiki Activity

Allow to create concave collision meshes. Note that this is only supported for static (mass 0) multibodies.

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This commit is contained in:
Erwin Coumans 2017-06-23 14:43:28 -07:00
parent a136098120
commit 2ab56b4d62
5 changed files with 111 additions and 40 deletions
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8
examples/SharedMemory/PhysicsClientC_API.cpp
View File

@ -716,6 +716,7 @@ b3SharedMemoryCommandHandle b3CreateCollisionShapeCommandInit(b3PhysicsClientHan
b3Assert(command);
command->m_type = CMD_CREATE_COLLISION_SHAPE;
command->m_updateFlags =0;
command->m_createCollisionShapeArgs = {0};
command->m_createCollisionShapeArgs.m_numCollisionShapes = 0;
return (b3SharedMemoryCommandHandle) command;
}
@ -733,6 +734,7 @@ int b3CreateCollisionShapeAddSphere(b3SharedMemoryCommandHandle commandHandle,do
if (shapeIndex <MAX_COMPOUND_COLLISION_SHAPES)
{
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_type = GEOM_SPHERE;
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_collisionFlags = 0;
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_hasChildTransform = 0;
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_sphereRadius = radius;
command->m_createCollisionShapeArgs.m_numCollisionShapes++;
@ -753,6 +755,7 @@ int b3CreateCollisionShapeAddBox(b3SharedMemoryCommandHandle commandHandle,doubl
if (shapeIndex <MAX_COMPOUND_COLLISION_SHAPES)
{
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_type = GEOM_BOX;
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_collisionFlags = 0;
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_hasChildTransform = 0;
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_boxHalfExtents[0] = halfExtents[0];
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_boxHalfExtents[1] = halfExtents[1];
@ -775,6 +778,7 @@ int b3CreateCollisionShapeAddCapsule(b3SharedMemoryCommandHandle commandHandle,d
if (shapeIndex <MAX_COMPOUND_COLLISION_SHAPES)
{
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_type = GEOM_CAPSULE;
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_collisionFlags = 0;
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_hasChildTransform = 0;
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_capsuleRadius = radius;
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_capsuleHeight = height;
@ -796,6 +800,7 @@ int b3CreateCollisionShapeAddCylinder(b3SharedMemoryCommandHandle commandHandle,
if (shapeIndex <MAX_COMPOUND_COLLISION_SHAPES)
{
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_type = GEOM_CYLINDER;
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_collisionFlags = 0;
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_hasChildTransform = 0;
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_capsuleRadius = radius;
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_capsuleHeight = height;
@ -818,6 +823,7 @@ int b3CreateCollisionShapeAddPlane(b3SharedMemoryCommandHandle commandHandle, do
if (shapeIndex <MAX_COMPOUND_COLLISION_SHAPES)
{
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_type = GEOM_PLANE;
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_collisionFlags = 0;
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_hasChildTransform = 0;
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_planeNormal[0] = planeNormal[0];
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_planeNormal[1] = planeNormal[1];
@ -841,6 +847,7 @@ int b3CreateCollisionShapeAddMesh(b3SharedMemoryCommandHandle commandHandle,cons
if (shapeIndex <MAX_COMPOUND_COLLISION_SHAPES && strlen(fileName)<VISUAL_SHAPE_MAX_PATH_LEN)
{
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_type = GEOM_MESH;
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_collisionFlags = 0;
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_hasChildTransform = 0;
strcpy(command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_meshFileName,fileName);
command->m_createCollisionShapeArgs.m_shapes[shapeIndex].m_meshScale[0] = meshScale[0];
@ -856,6 +863,7 @@ int b3CreateCollisionShapeAddMesh(b3SharedMemoryCommandHandle commandHandle,cons
void b3CreateCollisionSetFlag(b3SharedMemoryCommandHandle commandHandle,int shapeIndex, int flags)
{
struct SharedMemoryCommand* command = (struct SharedMemoryCommand*) commandHandle;
b3Assert(command);
b3Assert(command->m_type == CMD_CREATE_COLLISION_SHAPE);

56
examples/SharedMemory/PhysicsServerCommandProcessor.cpp
View File

@ -14,7 +14,7 @@
#include "../Importers/ImportURDFDemo/UrdfParser.h"
#include "../Utils/b3ResourcePath.h"
#include "Bullet3Common/b3FileUtils.h"
#include "../OpenGLWindow/GLInstanceGraphicsShape.h"
#include "BulletDynamics/Featherstone/btMultiBodySliderConstraint.h"
#include "BulletDynamics/Featherstone/btMultiBodyPoint2Point.h"
#include "BulletCollision/NarrowPhaseCollision/btPersistentManifold.h"
@ -3704,9 +3704,60 @@ bool PhysicsServerCommandProcessor::processCommand(const struct SharedMemoryComm
{
if (out_type==UrdfGeometry::FILE_OBJ)
{
//create a convex hull for each shape, and store it in a btCompoundShape
if (clientCmd.m_createCollisionShapeArgs.m_shapes[i].m_collisionFlags&GEOM_FORCE_CONCAVE_TRIMESH)
{
GLInstanceGraphicsShape* glmesh = LoadMeshFromObj(relativeFileName, pathPrefix);
if (!glmesh || glmesh->m_numvertices<=0)
{
b3Warning("%s: cannot extract mesh from '%s'\n", pathPrefix, relativeFileName);
delete glmesh;
break;
}
btAlignedObjectArray<btVector3> convertedVerts;
convertedVerts.reserve(glmesh->m_numvertices);
btVector3 meshScale(clientCmd.m_createCollisionShapeArgs.m_shapes[i].m_meshScale[0],
clientCmd.m_createCollisionShapeArgs.m_shapes[i].m_meshScale[1],
clientCmd.m_createCollisionShapeArgs.m_shapes[i].m_meshScale[2]);
for (int i=0; i<glmesh->m_numvertices; i++)
{
convertedVerts.push_back(btVector3(
glmesh->m_vertices->at(i).xyzw[0]*meshScale[0],
glmesh->m_vertices->at(i).xyzw[1]*meshScale[1],
glmesh->m_vertices->at(i).xyzw[2]*meshScale[2]));
}
BT_PROFILE("convert trimesh");
btTriangleMesh* meshInterface = new btTriangleMesh();
{
BT_PROFILE("convert vertices");
for (int i=0; i<glmesh->m_numIndices/3; i++)
{
const btVector3& v0 = convertedVerts[glmesh->m_indices->at(i*3)];
const btVector3& v1 = convertedVerts[glmesh->m_indices->at(i*3+1)];
const btVector3& v2 = convertedVerts[glmesh->m_indices->at(i*3+2)];
meshInterface->addTriangle(v0,v1,v2);
}
}
{
BT_PROFILE("create btBvhTriangleMeshShape");
btBvhTriangleMeshShape* trimesh = new btBvhTriangleMeshShape(meshInterface,true,true);
//trimesh->setLocalScaling(collision->m_geometry.m_meshScale);
shape = trimesh;
if (compound)
{
compound->addChildShape(childTransform,shape);
}
}
} else
{
std::vector<tinyobj::shape_t> shapes;
std::string err = tinyobj::LoadObj(shapes,out_found_filename.c_str());
//create a convex hull for each shape, and store it in a btCompoundShape
//shape = createConvexHullFromShapes(shapes, collision->m_geometry.m_meshScale);
//static btCollisionShape* createConvexHullFromShapes(std::vector<tinyobj::shape_t>& shapes, const btVector3& geomScale)
@ -3751,6 +3802,7 @@ bool PhysicsServerCommandProcessor::processCommand(const struct SharedMemoryComm
}
}
}
}
break;
}
default:

3
examples/pybullet/examples/createMultiBodyLinks.py
View File

@ -49,5 +49,8 @@ for i in range (p.getNumJoints(sphereUid)):
p.getJointInfo(sphereUid,i)
while (1):
keys = p.getKeyboardEvents()
print(keys)
time.sleep(0.01)

8
examples/pybullet/examples/createSphereMultiBodies.py
View File

@ -4,7 +4,11 @@ import time
useMaximalCoordinates = 0
p.connect(p.GUI)
p.loadSDF("stadium.sdf",useMaximalCoordinates=useMaximalCoordinates)
#p.loadSDF("stadium.sdf",useMaximalCoordinates=useMaximalCoordinates)
monastryId = concaveEnv =p.createCollisionShape(p.GEOM_MESH,fileName="samurai_monastry.obj",flags=p.GEOM_FORCE_CONCAVE_TRIMESH)
orn = p.getQuaternionFromEuler([1.5707963,0,0])
p.createMultiBody (0,monastryId, baseOrientation=orn)
sphereRadius = 0.05
colSphereId = p.createCollisionShape(p.GEOM_SPHERE,radius=sphereRadius)
colBoxId = p.createCollisionShape(p.GEOM_BOX,halfExtents=[sphereRadius,sphereRadius,sphereRadius])
@ -28,5 +32,7 @@ p.setGravity(0,0,-10)
p.setRealTimeSimulation(1)
while (1):
keys = p.getKeyboardEvents()
#print(keys)
time.sleep(0.01)

4
examples/pybullet/pybullet.c
View File

@ -5008,7 +5008,7 @@ static PyObject* pybullet_createCollisionShape(PyObject* self, PyObject* args, P
pybullet_internalSetVectord(planeNormalObj,planeNormal);
shapeIndex = b3CreateCollisionShapeAddPlane(commandHandle, planeNormal, planeConstant);
}
if (shapeIndex && flags)
if (shapeIndex>=0 && flags)
{
b3CreateCollisionSetFlag(commandHandle,shapeIndex,flags);
}
@ -7275,6 +7275,8 @@ initpybullet(void)
PyModule_AddIntConstant(m, "GEOM_PLANE", GEOM_PLANE);
PyModule_AddIntConstant(m, "GEOM_CAPSULE", GEOM_CAPSULE);
PyModule_AddIntConstant(m, "GEOM_FORCE_CONCAVE_TRIMESH", GEOM_FORCE_CONCAVE_TRIMESH);
SpamError = PyErr_NewException("pybullet.error", NULL, NULL);