//-
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//+

// DISCLAIMER: THIS PLUGIN IS PROVIDED AS IS.  IT IS NOT SUPPORTED BY

//            ALIAS, SO PLEASE USE AND MODIFY AT YOUR OWN RISK.

//

// PLUGIN NAME: closestPointOnMesh v1.0

// FILE: closestNormalUVAndFace.cpp

// DESCRIPTION: -Utility function definition, used by both the command and node.

//              -Please see readme.txt for full details.

// AUTHOR: QT

// REFERENCES: -This plugin's concept is based off of the "closestPointOnSurface" node.

//             -The MEL script AEclosestPointOnSurfaceTemplate.mel was referred to for

//              the AE template MEL script that accompanies the closestPointOnMesh node.

// LAST UPDATED: Oct. 13th, 2001.

// COMPILED AND TESTED ON: Maya 4.0 on Windows





// HEADER FILE:

#include "closestNormalUVAndFace.h"





// FUNCTION WHICH TAKES A SPECIFIED INPUT MESH AND A WORLDSPACE POSITION, AND FINDS THE CLOSEST POSITION, NORMAL, UV AND FACE INDEX ON THAT MESH:

void closestNormalUVAndFace(MDagPath meshDagPath, MPoint inPosition, MPoint &position, MVector &normal, double &parameterU, double &parameterV, int &closestFaceIndex, MObject theMesh)

{

   // FIND THE CLOSEST POSITION, NORMAL AND FACE TO THE INPUT POSITION:

   MFnMesh meshFn(meshDagPath);

   if (theMesh!=MObject::kNullObj)

      meshFn.setObject(theMesh);

   meshFn.getClosestPointAndNormal(inPosition, position, normal, MSpace::kWorld, &closestFaceIndex);



   // CREATE FACE ITERATOR, AND SET ITS INDEX TO THAT OF THE CLOSEST FACE, AND USE ITERATOR TO FIND CLOSEST UV:

   MItMeshPolygon faceIter(meshDagPath);

   if (theMesh!=MObject::kNullObj)

      faceIter.reset(theMesh);

   int dummyIndex;

   faceIter.setIndex(closestFaceIndex, dummyIndex);

   float2 uvPoint;

   faceIter.getUVAtPoint(position, uvPoint, MSpace::kWorld);

   parameterU = uvPoint[0];

   parameterV = uvPoint[1];

}