Basic real-time area lights.
This example is a basic implementation of Real-Time Polygonal-Light Shading with Linearly Transformed Cosines. Three lights are displayed, each with different orientation and parameters.
- W / A / S / D — move camera
- Mouse drag — look around
- R / Shift R — increase / decrease roughness of the plane
- M / Shift M — increase / decrease metalness of the plane
- F / Shift F — increase / decrease (specular reflection coefficient) of the plane
- F5 — reload shaders
Roughness, metallness and can be also configured through the UI.
This example was originally contributed by Jonathan Hale. The implementation is based on the paper "Real-Time Polygonal-Light Shading with Linearly Transformed Cosines" by Eric Heitz, Jonathan Dupuy, Stephen Hill and David Neubelt. The
*.dds files are republished with a permission from Eric Heitz. There's also a Guest Post introducing this example on the Magnum Blog.
The example makes use of the Adobe Source Sans Pro font through the Ui library, see its documentation for license information.
Full source code is linked below and together with assets also available in the magnum-examples GitHub repository.