8_0_silhouette

Code 8.1, 8.2, 8.3:

8_0_silhouette.frag

#version 300 es precision highp float; precision highp int; out vec4 fragColor; uniform float u_time; uniform vec2 u_resolution; void main(){ vec2 p = (gl_FragCoord.xy * 2.0 - u_resolution) / min(u_resolution.x, u_resolution.y); vec3 cPos = vec3(0.0, 0.0, 0.0); vec3 cDir = vec3(0.0, 0.0, - 1.0); vec3 cUp = vec3(0.0, 1.0, 0.0); vec3 cSide = cross(cDir, cUp); float targetDepth = 1.0; vec3 ray = cSide * p.x + cUp * p.y + cDir * targetDepth; vec3 groundNormal = vec3(0.0, 1.0, 0.0); if (dot(ray, groundNormal) < 0.0){ fragColor.rgb = vec3(1.0); } else { fragColor.rgb = vec3(0.0); } fragColor.a = 1.0; }

#version 300 es
precision highp float;
precision highp int;
out vec4 fragColor;
uniform float u_time;
uniform vec2 u_resolution;
void main(){
  vec2 p = (gl_FragCoord.xy * 2.0 - u_resolution) / min(u_resolution.x, u_resolution.y);
  vec3 cPos = vec3(0.0, 0.0, 0.0);
  vec3 cDir = vec3(0.0, 0.0, - 1.0);
  vec3 cUp = vec3(0.0, 1.0, 0.0);
  vec3 cSide = cross(cDir, cUp);
  float targetDepth = 1.0;
  vec3 ray = cSide * p.x + cUp * p.y + cDir * targetDepth;
  vec3 groundNormal = vec3(0.0, 1.0, 0.0);
  if (dot(ray, groundNormal) < 0.0){
    fragColor.rgb = vec3(1.0);
  } else {
    fragColor.rgb = vec3(0.0);
  }
  fragColor.a = 1.0;
}