glsl-cornell-box

(glsl bin demo)

The Cornell Box raymarched in GLSL, for testing purposes. Credit to @h3r3.

precision highp float;

uniform vec2 iResolution;
uniform float iGlobalTime;

#pragma glslify: cornell = require('glsl-cornell-box')
#pragma glslify: camera = require('glsl-turntable-camera')
 
void main() {
  vec3 ro, rd;
  float anim = sin(iGlobalTime);
  float rot = anim*0.1;
  float angle = anim*0.25;
  float dist = -2.0;
  camera(rot, angle, dist, iResolution.xy, ro, rd);

  gl_FragColor.rgb = cornell(ro, rd);
  gl_FragColor.a = 1.0; 
}

You will not be able to rotate around it fully as the back-side of each face will be black (unlit). PRs welcome.

Note: You should use highp precision in your shaders to support mobile and low-end GPUs.

Usage

vec3 cornellBox(vec3 ro, vec3 rd)

Raymarches a cornell box where ro is "ray origin" and rd is "ray direction." Returns the RGB colors of the scene. The colors are not clamped to 0.0 .. 1.0 range; this allows for bloom and other HDR effects.

License

License Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.

Details