aiden/video-shader-toys
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added random seed
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Aiden
2026-05-08 13:38:27 +10:00
parent 5eff189bbf
commit 7035cde8c8
10 changed files with 35 additions and 29 deletions
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11
shaders/balatro-swirl/shader.slang
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@@ -1,21 +1,22 @@
float4 balatroSwirl(float2 screenSize, float2 screenCoords, float time)
float4 balatroSwirl(float2 screenSize, float2 screenCoords, float time, float seed)
{
const float pi = 3.14159265359;
float safeScreenLength = max(length(screenSize), 1.0);
float2 uv = (screenCoords - 0.5 * screenSize) / safeScreenLength - offset;
float2 seedOffset = float2(sin(seed * 6.2831853), cos(seed * 6.2831853)) * 0.035;
float2 uv = (screenCoords - 0.5 * screenSize) / safeScreenLength - offset - seedOffset;
float uvLength = length(uv);
float speed = spinRotation * spinEase * 0.2;
if (isRotate)
speed = time * speed;
speed += 302.2;
speed += 302.2 + seed * 6.2831853;
float newPixelAngle = atan2(uv.y, uv.x) + speed - spinEase * 20.0 * (spinAmount * uvLength + (1.0 - spinAmount));
float2 mid = (screenSize / safeScreenLength) * 0.5;
uv = float2(uvLength * cos(newPixelAngle) + mid.x, uvLength * sin(newPixelAngle) + mid.y) - mid;
uv *= 30.0;
speed = time * spinSpeed;
speed = (time + seed * 17.0) * spinSpeed;
float2 uv2 = float2(uv.x + uv.y, uv.x + uv.y);
for (int i = 0; i < 5; ++i)
@@ -42,6 +43,6 @@ float4 balatroSwirl(float2 screenSize, float2 screenCoords, float time)
float4 shadeVideo(ShaderContext context)
{
float2 screenSize = max(context.outputResolution, float2(1.0, 1.0));
float4 swirl = balatroSwirl(screenSize, context.uv * screenSize, context.time);
float4 swirl = balatroSwirl(screenSize, context.uv * screenSize, context.time, context.startupRandom);
return saturate(lerp(swirl, context.sourceColor, sourceMix));
}