_GradPoint = function(p, c) {
            this.pos = p;
            this.color = c;
          }
add a toxiclibs.js mesh to the three.js scene
@param {Object|toxi.geom.mesh.TriangleMesh} obj_or_mesh either an options object or
the toxiclibsjs mesh
--
@param {toxi.geom.mesh.Trianglemesh} [obj_or_mesh.geometry] the mesh in the options object
@param {THREE.Material} [obj_or_mesh.material] the three.js material for the mesh
@param {boolean} [obj_or_mesh.holdInDictionary] should ToxiclibsSupport hold a reference?
--
@param {THREE.Material} [threeMaterials] the three.js material for the mesh