dungeon_crawler
annotate prototype/sdr/multi1.p.glsl @ 80:a373b36ffc17
better
| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Sat, 27 Oct 2012 01:59:39 +0300 |
| parents | |
| children |
| rev | line source |
|---|---|
| nuclear@60 | 1 /* multipass renderer shader 1: RGB: normal */ |
| nuclear@60 | 2 |
| nuclear@60 | 3 uniform sampler2D tex_norm; |
| nuclear@60 | 4 |
| nuclear@60 | 5 varying vec3 pos, norm, tang; |
| nuclear@60 | 6 |
| nuclear@60 | 7 void main() |
| nuclear@60 | 8 { |
| nuclear@60 | 9 vec3 n = normalize(norm); |
| nuclear@60 | 10 vec3 t = normalize(tang); |
| nuclear@60 | 11 vec3 b = cross(n, t); |
| nuclear@60 | 12 |
| nuclear@60 | 13 mat3 tbn_mat = mat3( |
| nuclear@60 | 14 t.x, t.y, t.z, |
| nuclear@60 | 15 b.x, b.y, b.z, |
| nuclear@60 | 16 n.x, n.y, n.z); |
| nuclear@60 | 17 |
| nuclear@60 | 18 // grab normal from the normal map, remap it and transform it to view space |
| nuclear@60 | 19 n = texture2D(tex_norm, gl_TexCoord[0].st).xyz * 2.0 - 1.0; |
| nuclear@60 | 20 n = normalize(tbn_mat * n); |
| nuclear@60 | 21 |
| nuclear@60 | 22 gl_FragColor = vec4(n, 0.0); |
| nuclear@60 | 23 } |