vertexAttrib2fv method
Implementation
void vertexAttrib2fv(int index, List<double> values){
startCheck('vertexAttrib2fv');
var arrayPointer = floatListToArrayPointer(values);
gl.glVertexAttrib2fv(index, arrayPointer);
checkError('vertexAttrib2fv');
calloc.free(arrayPointer);
}