41 lines
1.5 KiB
Plaintext
41 lines
1.5 KiB
Plaintext
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uniform sampler2D SCREEN_TEXTURE;
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uniform highp vec2 renderScale;
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uniform lowp int count;
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uniform highp vec2[10] position;
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uniform highp float[10] sharpness;
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uniform highp float[10] width;
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uniform highp float[10] falloffPower;
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void fragment() {
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highp vec2 coord = FRAGCOORD.xy * SCREEN_PIXEL_SIZE.xy;
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highp float ratio = SCREEN_PIXEL_SIZE.y / SCREEN_PIXEL_SIZE.x * 0.6;
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for (int i = 0; i < count; ++i) {
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highp vec2 WaveCentre = position[i];
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highp float Dist = distance(
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vec2(coord.x, coord.y * ratio),
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vec2(WaveCentre.x, WaveCentre.y * ratio)
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);
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// removes the first few frames of the "animation"
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Dist = max(Dist, 0.13);
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highp float offset = (TIME - floor(TIME)) / TIME;
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highp float CurrentTime = TIME * offset;
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if (Dist <= (CurrentTime + 0.1) && Dist >= (CurrentTime - 0.1)) {
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highp float Diff = Dist - CurrentTime;
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highp float ScaleDiff = 1.0 - pow(abs(Diff * sharpness[i]), width[i]);
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highp float DiffTime = Diff * ScaleDiff;
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highp vec2 DiffTexCoord = normalize(coord - WaveCentre);
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coord += (DiffTexCoord * DiffTime) / (CurrentTime * Dist * falloffPower[i]);
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highp vec4 Color = zTextureSpec(SCREEN_TEXTURE, coord);
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Color += (Color * ScaleDiff) / (CurrentTime * Dist * 40.0);
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COLOR = Color;
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} else {
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COLOR = zTextureSpec(SCREEN_TEXTURE, UV);
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}
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}
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}
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