🖼️ 3D Renderer in C++

A CPU-based 3D renderer written in C++, supporting simple primitive shapes and built entirely from scratch.

Upload the .ppm image file here to visualize the result: https://www.cs.rhodes.edu/welshc/COMP141_F16/ppmReader.html

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Supports both perspective and orthographic projections.

Supports simple .obj imports (assets/teapot.obj).

Work in progress...

Example Scene Render (Perspective View)

Rendering Pipeline Stages

• Object Space (Local Space)

  Vertices are defined relative to each object's origin.

  Example: A unit cube centered at (0,0,0).

• World Space

  The object's local transform (position, rotation, scale) is applied.

  All objects now share a common 3D world space.

• Camera (View) Space

  The scene is transformed relative to the camera’s position and orientation.

• Normalized Device Coordinates (NDC)

  All geometry is normalized into the range [-1, 1].

• Screen Space

  NDC is mapped to 2D pixel coordinates on the canvas.

• Rasterization

  Z-Buffer precalculated and used for triangles rasterization.

Vertices that are outside of the camera's view are ignored.

Wireframe triangles are rasterized onto the canvas.