A software renderer written from scratch in Python 3, using only modules from the Python Standard Library.
python3 render.pyContains an image class capable of generating an image and exporting it to a PNG. Images are implemented as a buffer of 32-bit RGBA pixel color data stored in a byte array. This modules uses zlib and struct for compressing and packing PNG data.
Classes representing points, lines and triangles. Each has a draw() method for drawing that shape in an Image. Anti-aliased lines are drawn using Wu's Line Drawing Algorithm. Triangles are drawn by iterating over a bounding box and calculating barycentric coordinates to smoothly interpolate color over the shape.
Class with functions for reading a .obj file into a stored model, retrieving vertices, faces, properties of the model.
Implements the rendering pipeline. Loads a model, transforms vertices, computes shading, rasterizes faces into triangles, and outputs the final image to a PNG.
12/29/17 – Hidden surface removal using Z-buffer
12/23/17 (1 year later 😛) – Smooth shading using vertex normals
12/24/16 – Simple n*l flat shading
9/13/16 – Load model from .obj file, rasterize and render with triangles
9/11/16 – Draw triangles
8/27/16 – Draw lines with Wu's Algorithm
8/19/16 – Image module wrapping a color buffer, PNG writer