Maya API - Move CV with Kinect - c++

Question

I’m trying to create a 64-bit plug-in for Autodesk Maya 2013. The aim of this plug-in is to be able to model objects through the Kinect.
In context, with the plug-in you can select the CV of a created object. To specify you want to move the selected points, the position of selected CV is updated constantly.
Here is my problem, when I try to update the position of a selected CV of an object, the result is not displayed on the screen.
I have tried many ways without getting any result, as an example:
1) when I do the setPosition the point doesn’t update.
for ( ; !iter.isDone(); iter.next() ) {
iter.getDagPath( mdagPath, mComponent );
MItSurfaceCV sCvFn( mdagPath, mComponent, true, &stat );
if ( MS::kSuccess == stat ) {
for ( ; !sCvFn.isDone(); sCvFn.nextRow() ) {
for ( ; !sCvFn.isRowDone(); sCvFn.next() ) {
MPoint pto(pHand.posX, pHand.posY, pHand.posZ);
sCvFn.setPosition(pto, MSpace::kWorld);
}
}
}
sCvFn.updateSurface();
}
2) in this case, if you iterate over the array newCVS before doing the setCVs you can see the updated points.
But then, when doing setCVs and looking for the position in the CV array of the object (doing a getCVs) the position of the modified CV doesn’t change.
for ( ; !iter.isDone(); iter.next() ) {
stat = iter.getDagPath( mdagPath, mComponent );
if(stat == MS::kSuccess) {
MFnNurbsSurface surf(mdagPath);
MItSurfaceCV sCvFn( mdagPath, mComponent, true, &stat );
MPointArray currentCV;
surf.getCVs(currentCV, MSpace::kWorld);
MPointArray newCVS(currentCV.length(), MPoint::origin);
newCVS.setLength(currentCV.length());
for(unsigned i = 0; i < currentCV.length(); i++){
newCVS[i] = newCVS[i] + currentCV[i];
}
int index;
if ( MS::kSuccess == stat ) {
for ( ; !sCvFn.isDone(); sCvFn.nextRow() ) {
for ( ; !sCvFn.isRowDone(); sCvFn.next() ) {
sCvFn.getIndex(indexU, indexV);
int posArray = indexU * surf.numCVsInV() + indexV;
index = posArray;
MVector diff = MPoint(pHand.posX, pHand.posY, pHand.posZ) - currentCV[posArray];
newCVS[posArray] = newCVS[posArray] + diff;
}
}
surf.setCVs(newCVS, MSpace::kWorld);
surf.updateSurface();
}
}
3) When having CV selected in Maya, I tried to move this points with MEL commands. For this, I use the “MGlobal::executeCommand” function, but still nothing happens.
Finally, I changed executeCommand to executeCommandOnIdle. In this case, the object change correctly but the procedure crashes, perhaps, because this procedure is executed many times per second.
I would appreciate if anyone can help me with this problem or knows something about this.