vertexAttrib4fv method
Implementation
void vertexAttrib4fv(int index, List<double> values){
  startCheck('vertexAttrib4fv');
  var arrayPointer = _floatListToArrayPointer(values);
  gl.glVertexAttrib4fv(index, arrayPointer);
  checkError('vertexAttrib4fv');
  calloc.free(arrayPointer);
}