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🪲 Allow glitch to distort the left side of the window #289

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🪲 Allow glitch to distort the left side of the window #289

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b9fb85e
:beetle: Allow glitch to distort the left side of the window
Kurtoid Jan 24, 2023
388bf39
:wrench: WIP implement glitch suggestions
Kurtoid Mar 31, 2023
07c6661
:fire: ":wrench: WIP implement glitch suggestions"
Kurtoid Nov 2, 2023
d51843c
:wrench: implement glitch suggestion v2
Kurtoid Nov 2, 2023
4761aa9
Merge branch 'Schneegans:main' into glitch_fix
Kurtoid Mar 7, 2024
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6 changes: 3 additions & 3 deletions resources/shaders/glitch.frag
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Original file line number Diff line number Diff line change
Expand Up @@ -29,11 +29,11 @@ void main() {
float yPos = uScale * uSize.y * (iTexCoord.y + uSeed * 10.0);

// Create large noise waves and add some smaller noise waves.
float noise = clamp(simplex2D(vec2(time, yPos * 0.002)) - 0.5, 0.0, 1.0);
float noise = clamp(simplex2D(vec2(time, yPos * 0.002)) - 0.5, -1.0, 1.0);
noise += (simplex2D(vec2(time * 10.0, yPos * 0.05)) - 0.5) * 0.15;

// Apply the noise as x displacement for every line.
float xPos = clamp(iTexCoord.x - displace * noise * noise, 0.0, 1.0);
float xPos = clamp(iTexCoord.x - displace * noise * noise * sign(noise), -1.0, 1.0);
vec4 oColor = getInputColor(vec2(xPos, iTexCoord.y));

// Mix in some random interference lines.
Expand Down Expand Up @@ -62,4 +62,4 @@ void main() {
oColor.a *= alpha;

setOutputColor(oColor);
}
}
10 changes: 8 additions & 2 deletions resources/shaders/tv-glitch.frag
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Original file line number Diff line number Diff line change
Expand Up @@ -49,11 +49,17 @@ void main() {
float yPos = uScale * uSize.y * (coords.y + uSeed * 10.0);

// Create large noise waves and add some smaller noise waves.
float noise = clamp(simplex2D(vec2(time, yPos * 0.002)) - 0.5, 0.0, 1.0);
float noise = clamp(simplex2D(vec2(time, yPos * 0.002)) - 0.5, -1.0, 1.0);
noise += (simplex2D(vec2(time * 10.0, yPos * 0.05)) - 0.5) * 0.15;

// Apply the noise as x displacement for every line.
float xPos = clamp(coords.x - displace * noise * noise, 0.0, 1.0);
float xPos = clamp(coords.x - displace * noise * noise * sign(noise), -1.0, 1.0);
// non-branching version of
// if xPos > 1: xPos -=1
// elif xPos < -1: xPos +=1
// else: xPos = 0
xPos = mod(xPos + 1.0, 2.0) - 1.0;

vec4 oColor = getInputColor(vec2(xPos, coords.y));

// Mix in some random interference lines.
Expand Down
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