Added new shaders

2026-05-05 22:36:52 +10:00
parent 119e49aec1
commit ce5905373a
32 changed files with 882 additions and 78 deletions
--- a/shaders/balatro-swirl/shader.json
+++ b/shaders/balatro-swirl/shader.json
@@ -0,0 +1,114 @@
+{
+  "id": "balatro-swirl",
+  "name": "Balatro Swirl",
+  "description": "Animated painterly swirl background. Original by localthunk (https://www.playbalatro.com), adapted from https://www.shadertoy.com/view/XXtBRr.",
+  "category": "Generative",
+  "entryPoint": "shadeVideo",
+  "parameters": [
+    {
+      "id": "spinRotation",
+      "label": "Spin Rotation",
+      "type": "float",
+      "default": -2.0,
+      "min": -8.0,
+      "max": 8.0,
+      "step": 0.05
+    },
+    {
+      "id": "spinSpeed",
+      "label": "Spin Speed",
+      "type": "float",
+      "default": 7.0,
+      "min": 0.0,
+      "max": 20.0,
+      "step": 0.1
+    },
+    {
+      "id": "spinAmount",
+      "label": "Spin Amount",
+      "type": "float",
+      "default": 0.25,
+      "min": 0.0,
+      "max": 1.0,
+      "step": 0.01
+    },
+    {
+      "id": "spinEase",
+      "label": "Spin Ease",
+      "type": "float",
+      "default": 1.0,
+      "min": 0.0,
+      "max": 3.0,
+      "step": 0.01
+    },
+    {
+      "id": "pixelFilter",
+      "label": "Pixel Filter",
+      "type": "float",
+      "default": 745.0,
+      "min": 120.0,
+      "max": 1600.0,
+      "step": 1.0
+    },
+    {
+      "id": "contrast",
+      "label": "Contrast",
+      "type": "float",
+      "default": 3.5,
+      "min": 0.5,
+      "max": 8.0,
+      "step": 0.05
+    },
+    {
+      "id": "lighting",
+      "label": "Lighting",
+      "type": "float",
+      "default": 0.4,
+      "min": 0.0,
+      "max": 1.5,
+      "step": 0.01
+    },
+    {
+      "id": "offset",
+      "label": "Offset",
+      "type": "vec2",
+      "default": [0.0, 0.0],
+      "min": [-1.0, -1.0],
+      "max": [1.0, 1.0],
+      "step": [0.001, 0.001]
+    },
+    {
+      "id": "colour1",
+      "label": "Colour 1",
+      "type": "color",
+      "default": [0.871, 0.267, 0.231, 1.0]
+    },
+    {
+      "id": "colour2",
+      "label": "Colour 2",
+      "type": "color",
+      "default": [0.0, 0.42, 0.706, 1.0]
+    },
+    {
+      "id": "colour3",
+      "label": "Colour 3",
+      "type": "color",
+      "default": [0.086, 0.137, 0.145, 1.0]
+    },
+    {
+      "id": "isRotate",
+      "label": "Rotate Field",
+      "type": "bool",
+      "default": false
+    },
+    {
+      "id": "sourceMix",
+      "label": "Source Mix",
+      "type": "float",
+      "default": 0.0,
+      "min": 0.0,
+      "max": 1.0,
+      "step": 0.01
+    }
+  ]
+}
--- a/shaders/balatro-swirl/shader.slang
+++ b/shaders/balatro-swirl/shader.slang
@@ -0,0 +1,49 @@
+float4 balatroSwirl(float2 screenSize, float2 screenCoords, float time)
+{
+	const float pi = 3.14159265359;
+	float safePixelFilter = max(pixelFilter, 1.0);
+	float safeScreenLength = max(length(screenSize), 1.0);
+	float pixelSize = safeScreenLength / safePixelFilter;
+	float2 uv = (floor(screenCoords * (1.0 / pixelSize)) * pixelSize - 0.5 * screenSize) / safeScreenLength - offset;
+	float uvLength = length(uv);
+
+	float speed = spinRotation * spinEase * 0.2;
+	if (isRotate)
+		speed = time * speed;
+	speed += 302.2;
+
+	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;
+	float2 uv2 = float2(uv.x + uv.y, uv.x + uv.y);
+
+	for (int i = 0; i < 5; ++i)
+	{
+		uv2 += float2(sin(max(uv.x, uv.y)), sin(max(uv.x, uv.y))) + uv;
+		uv += 0.5 * float2(cos(5.1123314 + 0.353 * uv2.y + speed * 0.131121), sin(uv2.x - 0.113 * speed));
+		float warp = cos(uv.x + uv.y) - sin(uv.x * 0.711 - uv.y);
+		uv -= float2(warp, warp);
+	}
+
+	float contrastMod = 0.25 * contrast + 0.5 * spinAmount + 1.2;
+	float paintRes = min(2.0, max(0.0, length(uv) * 0.035 * contrastMod));
+	float c1p = max(0.0, 1.0 - contrastMod * abs(1.0 - paintRes));
+	float c2p = max(0.0, 1.0 - contrastMod * abs(paintRes));
+	float c3p = 1.0 - min(1.0, c1p + c2p);
+	float light = (lighting - 0.2) * max(c1p * 5.0 - 4.0, 0.0) + lighting * max(c2p * 5.0 - 4.0, 0.0);
+
+	float safeContrast = max(contrast, 0.001);
+	float4 base = (0.3 / safeContrast) * colour1;
+	float4 paint = colour1 * c1p + colour2 * c2p + float4(c3p * colour3.rgb, c3p * colour1.a);
+	return base + (1.0 - 0.3 / safeContrast) * paint + float4(light, light, light, light);
+}
+
+float4 shadeVideo(ShaderContext context)
+{
+	float2 screenSize = max(context.outputResolution, float2(1.0, 1.0));
+	float4 swirl = balatroSwirl(screenSize, context.uv * screenSize, context.time);
+	return saturate(lerp(swirl, context.sourceColor, sourceMix));
+}