ssloy/tinyrenderer

Features

• Depth Buffers - The renderer tracks the depth of each pixel during rendering and discards fragments that are obscured by previously drawn surfaces to ensure accurate hidden surface removal.
• Software Renderers - Executes the entire graphics sequence on the central processor without relying on external hardware acceleration or graphics libraries.
• Software Rasterizers - Implements a complete software-based 3D graphics pipeline that performs all geometric transformations and rasterization on the CPU.
• 3D Graphics Pipelines - Implements a complete software-based 3D graphics pipeline for rendering geometry.
• Computer Graphics - Serves as a pedagogical resource for learning fundamental computer graphics and rendering algorithms.
• Graphics Education Resources - Provides a pedagogical resource for understanding the fundamental mathematical principles and algorithms required to render complex three-dimensional scenes.
• Rasterization Engines - Converts 3D meshes into 2D images through software-based rasterization.
• C++ Rendering Libraries - Provides a header-only C++ implementation of a 3D graphics pipeline.
• Algorithm Implementations - Implements core rendering techniques like barycentric interpolation, depth testing, and coordinate transformations for academic purposes.
• Matrix Transformation Engines - Uses four-by-four homogeneous matrices to perform linear and affine transformations for positioning and projecting 3D geometry.
• Triangle Rasterization - Renders filled triangles by calculating pixel coverage via barycentric coordinates.
• Back-Face Culling Utilities - Optimizes rendering performance by identifying and ignoring triangles oriented away from the camera.
• Barycentric Rasterizers - Implements barycentric coordinate calculation to determine pixel coverage within triangles during the rasterization process.
• Frontend and Web Tools - A simple 3D renderer implementation in C++.
• Graphics Engines - Listed in the “Graphics Engines” section of the Build Your Own X awesome list.
• Systems Programming - Implement a software-based 3D renderer from the ground up.
• Computer Graphics Foundations - Software renderer demonstrating how OpenGL works.
• Graphics Theory and Practice - Educational software rasterizer and ray-tracer implementation.
• Graphics and Games - A minimalist 3D renderer implementation.
• Coordinate and Viewport Transformations - Maps 3D world space coordinates onto a 2D screen plane by applying scaling and translation transformations.
• Camera Projection Systems - Deforms 3D space using a focal-length matrix to simulate depth and realistic perspective.
• Shaders - Enables the creation of specialized shading models by manually calculating light interactions and surface properties.
• Shadow Mapping - Calculates shadows by comparing fragment depth against a light-source depth map.
• Barycentric Calculators - Determines the relative position of a point within a triangle by computing weights that represent the area ratios of sub-triangles.
• Shadow Mapping - Determines surface occlusion by comparing fragment depth against a pre-rendered scene representation from the light source perspective.
• Homogeneous Transformation Utilities - Uses four-by-four matrices to perform translations and perspective projections through matrix multiplication.
• Lighting Systems - Simulates indirect lighting and depth by calculating ambient occlusion.
• Screen Space Ambient Occlusion - Approximates contact shadows by sampling the depth buffer in screen space.
• Vertex Attribute Interpolators - Computes values for pixels inside a triangle by performing a weighted average of vertex data based on their barycentric coordinates.
• 3D Surface Visualizations - Simulates realistic material properties by calculating ambient, diffuse, and specular lighting.
• Camera Systems - Positions and orients a virtual camera in 3D space using eye, center, and up-vector parameters.
• Attribute Interpolators - Computes smooth values for surface properties across triangles by performing weighted averages of vertex data during rasterization.
• Texture Mapping - Assigns 2D coordinates to 3D vertices to enable the projection of images onto geometry during the rasterization process.
• Texture Samplers - Retrieves color or vector information from image files based on interpolated coordinates to apply surface details.
• Viewport Transformations - Maps transformed 3D coordinates to the final 2D screen space for display.
• Visibility Sorting - The renderer orders geometric primitives from back to front so that closer surfaces overwrite distant ones during the rasterization process to simulate correct visibility.
• Geometry Parsers - Reads vertex and face data from standard text-based geometry files to reconstruct 3D objects for rendering.
• Tangent Space Normal Mapping - Applies surface details using tangent-space normal maps to enhance visual realism.

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