bgi_gl_shaders.h File Reference

Embedded GLSL source strings for the BGI OpenGL rendering pipeline. More...

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Detailed Description

Embedded GLSL source strings for the BGI OpenGL rendering pipeline.

Three shader programs:

1. Page-texture program — draws the 2D BGI page buffer as a fullscreen RGBA quad.
2. Flat Phong program — per-face Phong shading using the flat GLSL qualifier.
3. Smooth Phong program — per-vertex (Gouraud) Phong shading with interpolated normals.
4. Line program — depth-tested coloured line segments (no lighting).

All solid shaders implement a two-light Phong model:

• Primary light: configurable direction, world-space or view-space.
• Fill light: configurable direction (always world-space), reduced intensity.
• Ambient + diffuse + specular + shininess are uniform scalars.