[Maya] Plug-in development II

Function:

Create a bunch of cylinders along the selected curve. The number of cylinders, the radius and the height can be specified through parameters.

 

Main Code:

MStatus Posts1Cmd::doIt(const MArgList &args)
{
    int nPosts=5;
    double radius=0.5;
    double height=5.0;

    unsigned index;
    index=args.flagIndex("n", "number");
    if(MArgList::kInvalidArgIndex!=index)
        args.get(index+1,nPosts);

    index=args.flagIndex("r","radius");
    if(MArgList::kInvalidArgIndex!=index)
        args.get(index+1, radius);

    index=args.flagIndex("h", "height");
    if(MArgList::kInvalidArgIndex!=index)
        args.get(index+1,height);

    MSelectionList selection;
    MGlobal::getActiveSelectionList(selection);

    MDagPath dagPath;
    MFnNurbsCurve curveFn;
    double heightRatio=height/radius;

    MItSelectionList iter(selection, MFn::kNurbsCurve);
    for(;!iter.isDone();iter.next())
    {
        iter.getDagPath(dagPath);
        curveFn.setObject(dagPath);

        double tStart, tEnd;
        curveFn.getKnotDomain(tStart, tEnd);

        MPoint pt;
        int i;
        double t;
        double tIncr=(tEnd-tStart)/(nPosts-1);
        for(i=0,t=tStart;i<nPosts;i++, t+=tIncr)
        {
            curveFn.getPointAtParam(t,pt,MSpace::kWorld);
            pt.y+=0.5*height;

            MGlobal::executeCommand(MString("cylinder -pivot ")+pt.x+" "+pt.y+" "+pt.z+
                " -radius "+radius+" -axis 0 1 0 -heightRatio "+heightRatio);
        }
    }

    return MS::kSuccess;
}

 

Snapshot: