Weaving silk into textures. Spindle is a C# Wavefront GPU path tracer based on Silk.NET and OpenCL.
Created and maintained by Silas Peters and Jort Willemsen
Spindle is a path tracer built from the ground up for the Advanced Graphics course at Utrecht University (UU). The wavefront implemenation is based on the 'Megakernels Considered Harmful' paper by Laine et al. published in 2013.
- Geometry
- Spheres
- Triangles*
- Materials
- Diffuse
- Reflective
- Lighting
- Point light
- Multi camera support
- Acceleration structures*
- Bounding Volume Hierarchy (BVH)
- kD-Tree
- Antialiasing
- Camera controls
- Importing
- .OBJ file importing
- Exporting
- .PPM image exporting
* Only supported using CPU rendering.
One can start the path tracer by starting the Renderer project from within his IDE.
Otherwise, go to the root folder of this project and run dotnet build -c release.
Then, go to Renderer/bin/Release/net6.0 and start ./Renderer.
The working directory is important in order to be able to load the program files.
The binary expects the working directory to contain the Programs folder copied from Gpu/Programs.
This project has two renderers: one simple path tracer which can optionally benefit from a BVH acceleration structure, and one OpenCL renderer.
In program.cs in the Renderer project, you can control the renderer used and the scene.
If you use the SampledCamera camera, you use the CPU one to benefit from BVH speedups if enabled.
OpenCLCamera can be used instead to benefit from GPU speedups.
When rendering with the CPU camera and not the OpenCL camera, the following controls can be used (note: rendering multiple cameras is bugged since adding the OpenCL camera):
Escape or Alt-F4 - Exit
WASD - Translate focussed camera along X and Z axis
QE - Translate focussed camera along Y axis
Arrow keys - Rotate focussed camera
IO - Zoom In and Out
BackSlash - Cycle trough camera layouts
HL - Increase/Decrease number of visible cameras
JK - Cycle focus through cameras
CX - Add and Delete focussed camera