- precision mediump float;
- uniform vec4 color;
- varying vec3 vertexNormal;
- void main() {
- vec3 normal = normalize(vertexNormal);
- float lambert = max(0.0, -normal.y);
- float rim = 1.0 - lambert;
- rim *= rim * rim;
- gl_FragColor = rim + (0.4 + 0.4 * lambert) * color;
- }
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