oculus2_psprite
annotate sdr/psprite.p.glsl @ 21:dc7af0f549b2
VR point sprite shooting test
| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Thu, 22 Jan 2015 06:19:52 +0200 |
| parents | |
| children |
| rev | line source |
|---|---|
| nuclear@21 | 1 #version 120 |
| nuclear@21 | 2 |
| nuclear@21 | 3 void main() |
| nuclear@21 | 4 { |
| nuclear@21 | 5 vec2 pt = gl_PointCoord.xy * 2.0 - 1.0; |
| nuclear@21 | 6 float len = length(pt); |
| nuclear@21 | 7 vec2 dir = pt / len; |
| nuclear@21 | 8 float angle = atan(dir.y, dir.x); |
| nuclear@21 | 9 |
| nuclear@21 | 10 float alpha = 1.0 - smoothstep(0.8, 0.9, len + abs(sin(angle * 8.0)) * 0.1); |
| nuclear@21 | 11 gl_FragColor = vec4(1.0, 1.0, 1.0, alpha); |
| nuclear@21 | 12 } |