39 lines
855 B
GLSL
39 lines
855 B
GLSL
uniform sampler2D tex;
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uniform sampler2D grain;
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const int NPOINTS = 5;
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uniform float env;
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uniform vec3 pos[NPOINTS];
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uniform float intensity[NPOINTS];
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uniform float localTime;
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uniform float zoom;
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const float PI = 3.14159265;
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void main()
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{
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float x = gl_TexCoord[0].s * zoom;
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float y = gl_TexCoord[0].t * zoom;
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float u = localTime * 0.25;
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vec4 color = vec4(0.0);
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for (int i = 0; i < 5; i++)
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{
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vec3 diff = vec3(x, y, 0.0) - pos[i];
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float angle = atan(diff.y, diff.x);
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float d = env * 1.0; /* length(pos[i]);*/
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float t = (d + localTime) * 0.03 ;
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float s = u + angle / PI + (float(i) * 0.1);
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float dist = length(diff);
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vec4 grain = texture2D(grain, vec2(0.5, 0.3 * dist));
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color += (texture2D(tex, vec2(s,t)) * grain) * (intensity[i] / (1.0 + 0.2 * dist));
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}
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gl_FragColor = vec4(color.rgb * 0.6 + 0.4 * env, 1.0);
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}
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