hello.
I have created a little engine in 2d in opengl for qt.
I Would create a system for create a filled disk and a rectangle(for now) of different color ,positioned at the mouse x,y when i click.
The question is :
1)How i can create the disk? with the sine/cosine and a step angle and for the fill? but is better on the shader(GLSL) or on the cpu ?
2)i wish parametrize the color for ex.
If i create a vbo with the color attribute every time that the color must change i must change the vbo.
Is not better using a uniform var with the color and matrixes for the scale/translate/rotate for the entities?