#gamedev #opengl #3dgraphics
Hey all, here are some clips I took while building a new rendering pipeline for the 2X- and 4X-zoom weapon scopes.
This pipeline involves:
- rendering the gun and scope
- rendering the non-zoomed scene behind the gun
- rendering the zoomed scene within the scope
I use a stencil buffer to restrict the zoomed scene to the scope area.
Each scene stores a unique bit in an extra R8 framebuffer texture, which is used to differentiate between the different scenes in postprocessing shaders.
I apply postprocessing over the entire scene in one pass, using a different inverse view projection for each of the three regions (background, gun and scope) to reconstruct each pixel's world-space position from a single depth buffer. This world-space position is then used in lighting, shadows and SSAO shaders.
This seems to be rendering a lot faster than the old blurred-background method, and the code is a lot simpler too! It feels great to be able to see around me while also aiming at a target through a 2X scope.
Music is by Punch Deck: / punchdeck
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