Doom III

Horizonmapping Techdemo

Description:

We all know Bumpmapping which calculates the pixelcolour depending on the angle between the pixels normal and the lightdirection but if we take a closer look we notice that these "shadows" wont get
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longer or shorter.This is when horizonmapping becomes handy which allows us to draw a correct shadow which gets longer and shorter. Although horizonmapping is normally done with additional textures , I decided that a heightmap (stored in the Normalmaps Bluechannel) should be enough to generate these "shadows".The Shader simply traces a ray from the current pixelposition back to the light and checks if hit intersects another pixel, if it does so , the currentpixel must be in the shadowvolume.
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File Name:
horizon.zip
File Size:
225.45 KB
Date Added:
09-04-2009
Download Last 2 Week:
0
Downloads All Time:
70
Popularity:
0.02%
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