88 lines
2.6 KiB
JavaScript
88 lines
2.6 KiB
JavaScript
/**
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* Sunburst animation illumination shader
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*/
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class SunburstIlluminationShader extends AdaptiveIlluminationShader {
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static fragmentShader = `
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${this.SHADER_HEADER}
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${this.PERCEIVED_BRIGHTNESS}
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// Smooth back and forth between a and b
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float cosTime(in float a, in float b) {
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return (a - b) * ((cos(time) + 1.0) * 0.5) + b;
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}
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// Create the sunburst effect
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vec3 sunBurst(in vec3 color, in vec2 uv, in float dist) {
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// Pulse calibration
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float intensityMod = 1.0 + (intensity * 0.05);
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float lpulse = cosTime(1.3 * intensityMod, 0.85 * intensityMod);
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// Compute angle
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float angle = atan(uv.x, uv.y) * INVTWOPI;
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// Creating the beams and the inner light
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float beam = fract(angle * 16.0 + time);
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float light = lpulse * pow(abs(1.0 - dist), 0.65);
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// Max agregation of the central light and the two gradient edges
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float sunburst = max(light, max(beam, 1.0 - beam));
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// Creating the effect : applying color and color correction. ultra saturate the entire output color.
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return color * pow(sunburst, 3.0);
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}
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void main() {
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${this.FRAGMENT_BEGIN}
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vec2 uv = (2.0 * vUvs) - 1.0;
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finalColor = switchColor(computedBrightColor, computedDimColor, dist);
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${this.ADJUSTMENTS}
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finalColor = sunBurst(finalColor, uv, dist);
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${this.FALLOFF}
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${this.FRAGMENT_END}
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}`;
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}
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/**
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* Sunburst animation coloration shader
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*/
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class SunburstColorationShader extends AdaptiveColorationShader {
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static fragmentShader = `
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${this.SHADER_HEADER}
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${this.PERCEIVED_BRIGHTNESS}
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// Smooth back and forth between a and b
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float cosTime(in float a, in float b) {
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return (a - b) * ((cos(time) + 1.0) * 0.5) + b;
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}
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// Create a sun burst effect
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vec3 sunBurst(in vec2 uv, in float dist) {
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// pulse calibration
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float intensityMod = 1.0 + (intensity * 0.05);
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float lpulse = cosTime(1.1 * intensityMod, 0.85 * intensityMod);
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// compute angle
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float angle = atan(uv.x, uv.y) * INVTWOPI;
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// creating the beams and the inner light
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float beam = fract(angle * 16.0 + time);
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float light = lpulse * pow(abs(1.0 - dist), 0.65);
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// agregation of the central light and the two gradient edges to create the sunburst
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float sunburst = max(light, max(beam, 1.0 - beam));
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// creating the effect : applying color and color correction. saturate the entire output color.
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return color * pow(sunburst, 3.0);
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}
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void main() {
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${this.FRAGMENT_BEGIN}
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vec2 uvs = (2.0 * vUvs) - 1.0;
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finalColor = sunBurst(uvs, dist) * colorationAlpha;
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${this.COLORATION_TECHNIQUES}
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${this.ADJUSTMENTS}
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${this.FALLOFF}
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${this.FRAGMENT_END}
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}`;
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}
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