vertexAttrib3fv method
Implementation
void vertexAttrib3fv(int index, List<double> values){
startCheck('vertexAttrib3fv');
var arrayPointer = floatListToArrayPointer(values);
gl.glVertexAttrib3fv(index, arrayPointer);
checkError('vertexAttrib3fv');
calloc.free(arrayPointer);
}