I'm trying to create two rectangles using glut, while having one constant as a static background, and the other move around.

How can one go about making a static background that doesn't disappear whenever I move the second object?

What I currently get is that only the object that I draw second (not the background) appears on the output screen, while the background is empty (black).

CodePudding user response：

After you clear the screen, draw everything that you want to be on the screen. This is how it works in OpenGL. It doesn't remember anything like "there was a background here" - it just processes drawing commands.