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OpenGL Slices

Roan requested to merge opengl/slices into develop

Created by: RoanH

This PR implements a lot of partial circular shapes (aka slices).

Showcase screenshot: afbeelding

Subroutine overview:

  • drawCircleSlice
  • fillCircleSlice
  • fillLinedCircleSlice
  • drawRingSlice
  • fillRingSlice
  • fillLinedRingSlice

And more detailed information is present in the updated documentation.

Some code for reviewers (creates what's in the image above):

gl.drawCircleSlice(500, 0, 200, 0, (360 / 3), [1, 0, 0, 1], 1);
gl.fillCircleSlice(500 - 50, 0, 200, (360 / 3), (360 / 3) * 2, [1, 0, 0, 1], 1);
gl.fillLinedCircleSlice(500, 0, 200, (360 / 3) * 2, (360 / 3) * 3, [1, 0, 0, 1], [0, 0, 0, 1], 1);   
gl.drawRingSlice(1000, 0, 100, 200, 0, (360 / 3), [1, 0, 0, 1], 1);
gl.fillRingSlice(1000, 0, 150, 200, (360 / 3), (360 / 3) * 2, [1, 0, 0, 1], 1);
gl.fillLinedRingSlice(1000, 0, 100, 200, (360 / 3) * 2, (360 / 3) * 3, [1, 0, 0, 1], [0, 0, 0, 1], 1);

fixes #84 (closed)

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