actually ran into an issue similar to this one some skin weight tools I was building. My errors seemed to come from maya attempting to redraw the nurbs surface when the weights were changing, but I haven't had the chance to explore the issue further. Would be good to get some information from some more experienced API guys. Mine was using the mfnSkinCluster and only crashed on multiple nurbs surface and most of the time was only if I was using soft selection.
Brandon L. Harris On Jan 25, 5:19 am, "Imre \"Public\" Tuske" <[email protected]> wrote: > Hiya, > > I'm currently working on (actually, finished) a small tool that transfers > deformer weights from one deformer node to another (between objects of > non-identical topologies, similar to the Transfer Attributes tool). > > I have a pointCloud class (i omit its code, but its very simple) which I use > for storing the deformer weights for each point. Then I have the following: > > --------------------------------------------------------------------------------------------------------------------------------- > > import pointCloud as PC # my own point cloud class > > > from maya.OpenMaya import * > > from maya.OpenMayaAnim import * > > > > > def getDeformerWeightsToPC(pc, deformer_name): > > """Get all per-vertex deformer weights to a point cloud.""" > > #assert type(pc) is pointCloud > > assert type(pc) is PC.pointCloud > > assert type(deformer_name) is str > > > print "getDeformerWeightsToPC() ..." > > try: > > sel = MSelectionList() > > sel.add(deformer_name) > > > obj = MObject() > > sel.getDependNode(0, obj) > > > f = MFnWeightGeometryFilter(obj) > > num_connections = f.numOutputConnections() > > > for c in range(num_connections): > > i = f.indexForOutputConnection(c) > > shape_path = MDagPath() > > f.getPathAtIndex(i, shape_path) > > it = MItGeometry(shape_path) > > > print i, shape_path.fullPathName(), it.count() > > w = MFloatArray() > > while not it.isDone(): > > comp = it.currentItem() > > > p = it.position(MSpace.kWorld) > > p = (p[0], p[1], p[2]) > > f.getWeights(i, comp, w) > > > pc.addPoint(p, float(w[0])) > > it.next() > > pc.setName(deformer_name) > > > except Exception, e: > > print "failed to get weights from deformer:", type(e), e > > pass > > > > > def setDeformerWeightsFromPC(pc, deformer_name): > > assert type(pc) is PC.pointCloud > > assert type(deformer_name) is str > > > print "setDeformerWeightsToPC() ..." > > try: > > sel = MSelectionList() > > sel.add(deformer_name) > > > obj = MObject() > > sel.getDependNode(0, obj) > > > f = MFnWeightGeometryFilter(obj) > > num_connections = f.numOutputConnections() > > > W = MFloatArray(1, 0.0) > > for c in range(num_connections): > > i = f.indexForOutputConnection(c) > > shape_path = MDagPath() > > f.getPathAtIndex(i, shape_path) > > it = MItGeometry(shape_path) > > > print i, shape_path.fullPathName(), it.count() > > while not it.isDone(): > > comp = it.currentItem() > > > print comp, comp.apiTypeStr() > > p = it.position(MSpace.kWorld) > > p = (p[0], p[1], p[2]) > > > W[0] = pc.getValue(p) > > f.setWeight(shape_path, i, comp, W) > > > it.next() > > > except Exception, e: > > print "failed to set weights from deformer:", type(e), e > > pass > > > > > def transferDeformerWeights(): > > """A test function.""" > > > print "transferDeformerWeights() !!!" > > pc = PC.pointCloud() > > getDeformerWeightsToPC(pc, "cluster1") > > setDeformerWeightsFromPC(pc, "cluster2") > > --------------------------------------------------------------------------------------------------------------------------------- > > The above code works properly between polygon meshes. However once I try to > run it where I try to transfer TO (ie. do ::setWeights() on) nurbs surfaces > or curves _sharing the same deformer_, the code crashes Maya (it does an > emergency save, which usually shows that the code ran successfully for the > first few CVs). > > So it crashes when I try it on: > - a deformer, applied to multiple nurbs objects (be it curves or surfaces); > - if I run the function _more than once_ for a single nurbs object with a > single deformer on it. > > Any help or idea would be appreciated > > imre > > -- > [ Imre Tuske |http://blueriviera.wordpress.com/| mailto: > [email protected] ] > > " On a horse made of crystal he patrolled the land > With a mason ring and schnauzer in his perfect hands " -- http://groups.google.com/group/python_inside_maya
