Exhibit #11: Setting the Viewport

What We Did

• Again, the viewport is the area on the screen that is drawn upon.
• We can set the viewport with the gl.viewport(left, bottom, width, height) command.
  • The units of the arguments are pixels.
  • The values left and bottom are the following coordinate system:
    • $(0,0)$ is the bottom-left corner.
    • $(canvas.width,canvas.height)$ is the top-right corner.
• This only affects the primitives drawn. This does not affect the clearing of the screen.