Nvidia Rain via DirectX 10
- They are rendering sprites via the DX10 method (one vert input, 4 verts output)
- Rain changes quickly as it falls, it refracts and reflects
- These streaks are motion blurred
- Columbia Univ precalculated the look of rain here
- http://www1.cs.columbia.edu/CAVE/databases/rain_streak_db/rain_streak.php
- Its a texture database
- Inputs: viewing angle (not used in the nvidia sample)
- light angle vertical, light angle horizontal
- Texture format is L8 DDS, over 300 textures loaded
- nvidia uses DX10 texture array, could use 3D texture or texture atlas