3D Software Renderer

Features

• glm was not used for this project. Instead, I created the following:
• • slib.cpp/hpp - A helper library. Contains mutliple vector/matrix classes with operators overloaded for convenience.
• • smath.cpp/hpp - A maths library. Can generate all necessary matricies for the renderer.
• Model/material loading. objParser.cpp/hpp parses and loads obj files and their accompanying mtl files into the renderable class used by the renderer.
• Full rendering pipeline. renderer.cpp/hpp takes the 3D model data provided as a renderable and puts it through the pipeline to convert it to screen space coordinates.
• Z-Buffer implementation.
• Triangle rasterization. rasterizer.cpp/hpp takes the data provided from the renderer and fills the triangle accordingly with the edge-finding algorithm (not scanline).
  • Texturing is implemented and is read from the mtl files provided. (Textures must be png files).
  • Two texture filtering algorithms - either nearest neighbour or bilinear filtering.
  • Two shading algorithms - either flat or gouraud shading.
  • Basic directional lighting.
  • Multiple textures are supported.
  • Texture atlases are supported. Can be used with bilinear filtering if atlas 'tiles' are a consistent size.
• A GUI that displays the scene's framerate and allows the user to select from various pre-selected scenes.
• Multithreaded processing thanks to the opm library.

Screenshots

To Do

• Triangle clipping is currently not implemented. Currently, triangle too close to the camera are just culled to avoid dividing by zero.
• Billinear filtering causes shadows to appear darker (sampling bug).
• Multithreaded rendering causes slight flickering.

Models Used

• Viking Room by nigelgoh.
• Isometric Game Level Low Poly by Karthik Naidu.
• Concrete Cat statue by Rico Cilliers and Riley Queen