glasso

glasso.glsl

uniform float adsk_time;
uniform float adsk_result_w, adsk_result_h;
uniform sampler2D front, matte;

float get(vec2 p) {
	return texture2D(matte, p).r;
}

void main(void)
{
	vec2 resolution = vec2(adsk_result_w, adsk_result_h);
	vec2 p = gl_FragCoord.xy / resolution;

	float g = get(p);
	vec3 n = normalize(vec3(g - get(p+vec2(0.01, 0.0)), g - get(p+vec2(0.0, 0.01)), 0.3));
	p += n.xy * -0.2;

	vec3 c = texture2D(front, p).rgb;
	c *= n.z * 0.84;
	c += 0.2 * pow(abs(dot(n, vec3(0.7))), 80.0);

	gl_FragColor = vec4(c, 1.0);
}