I m trying to figure out how I could use the MMeshIntersector for
collision.
If I use it in an MPxDeformerNode, in conjunction with the geomIter, I
will get the vertex position without the deformation?
Because the MMeshIntersector::getClosestPoint can use the vertex
position to detect a closest point to another mesh, I think if the
actual vertex position is the point use it for the
MMeshIntersector::getClosestPoint.
The vertex will continue moving if the mesh collide with that point.
But I dont know how to get the deforming mesh inside the deform()
Heres is my code:
def deform(self,dataBlock,geomIter,matrix,multiIndex):
input = OpenMayaMPx.cvar.MPxDeformerNode_input
inputArray = dataBlock.inputArrayValue(input)
inputArray.jumpToElement(multiIndex)
inputData = inputArray.inputValue()
inputGeom = OpenMayaMPx.cvar.MPxDeformerNode_inputGeom
inputGeomDataH = inputData.child(inputGeom)
inputMesh = inputGeomDataH.asMesh()
sourceFnMesh = OpenMaya.MFnMesh( inputMesh )
connected = False
verts = OpenMaya.MPointArray()
geomIter.allPositions(verts)
maxDistHandle = dataBlock.inputValue(self.aMaxDistance)
maxDist = maxDistHandle.asDouble()
try:
colliderMesh =
dataBlock.inputValue( sk_collideNode.aCollider ).asMesh()
colliderFnMesh = OpenMaya.MFnMesh( colliderMesh )
connected = True
except:
connected = False
if (connected):
intersector = OpenMaya.MMeshIntersector()
intersector.create(colliderMesh)
point = OpenMaya.MPoint()
while geomIter.isDone() == False:
ind = geomIter.index()
sourceFnMesh.getPoint(ind,point,OpenMaya.MSpace.kObject)
meshPoint = OpenMaya.MPointOnMesh()
try:
intersector.getClosestPoint(point,
meshPoint,maxDist)
FinalPoint =
OpenMaya.MPoint(meshPoint.getPoint())
except:
FinalPoint = OpenMaya.MPoint(point)
verts.set(FinalPoint,ind)
geomIter.next()
geomIter.setAllPositions(verts)
--
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