Release God's Eye View as open source

src/styles/anime.js

@@ -0,0 +1,70 @@
+/**
+ * Anime / Studio Ghibli Style — Cel-shading + Saturation boost
+ * Transforms the world into an animated film look
+ */
+export const animeShader = {
+  name: 'anime',
+  uniforms: {
+    saturation: { default: 1.0, min: 0, max: 2, label: 'Saturation' },
+    edgeThick: { default: 0.5, min: 0, max: 1, label: 'Edge Thickness' },
+  },
+  fragmentShader: /* glsl */ `
+    uniform sampler2D colorTexture;
+    uniform vec2 colorTextureDimensions;
+    uniform float intensity;
+    uniform float saturation;
+    uniform float edgeThick;
+    in vec2 v_textureCoordinates;
+
+    vec3 rgb2hsv(vec3 c) {
+      vec4 K = vec4(0.0, -1.0/3.0, 2.0/3.0, -1.0);
+      vec4 p = mix(vec4(c.bg, K.wz), vec4(c.gb, K.xy), step(c.b, c.g));
+      vec4 q = mix(vec4(p.xyw, c.r), vec4(c.r, p.yzx), step(p.x, c.r));
+      float d = q.x - min(q.w, q.y);
+      float e = 1.0e-10;
+      return vec3(abs(q.z + (q.w - q.y) / (6.0 * d + e)), d / (q.x + e), q.x);
+    }
+
+    vec3 hsv2rgb(vec3 c) {
+      vec4 K = vec4(1.0, 2.0/3.0, 1.0/3.0, 3.0);
+      vec3 p = abs(fract(c.xxx + K.xyz) * 6.0 - K.www);
+      return c.z * mix(K.xxx, clamp(p - K.xxx, 0.0, 1.0), c.y);
+    }
+
+    void main() {
+      vec2 uv = v_textureCoordinates;
+      vec2 texel = 1.0 / colorTextureDimensions;
+      vec4 color = texture(colorTexture, uv);
+
+      // Cel-shade: quantize luminance into bands
+      float luma = dot(color.rgb, vec3(0.299, 0.587, 0.114));
+      float bands = mix(256.0, 4.0, intensity);
+      float celLuma = floor(luma * bands + 0.5) / bands;
+      float lumaScale = (luma > 0.001) ? celLuma / luma : 1.0;
+      vec3 celColor = color.rgb * lumaScale;
+
+      // Boost saturation for vibrant anime look (driven by saturation uniform)
+      vec3 hsv = rgb2hsv(celColor);
+      hsv.y = min(hsv.y * (1.0 + 0.6 * intensity * saturation), 1.0);
+      hsv.z = min(hsv.z * (1.0 + 0.1 * intensity), 1.0);
+      vec3 saturated = hsv2rgb(hsv);
+
+      // Soft edge detection for outlines
+      vec4 left  = texture(colorTexture, uv + vec2(-texel.x, 0.0));
+      vec4 right = texture(colorTexture, uv + vec2( texel.x, 0.0));
+      vec4 up    = texture(colorTexture, uv + vec2(0.0,  texel.y));
+      vec4 down  = texture(colorTexture, uv + vec2(0.0, -texel.y));
+
+      float edgeH = length(right.rgb - left.rgb);
+      float edgeV = length(up.rgb - down.rgb);
+      float edge = sqrt(edgeH * edgeH + edgeV * edgeV);
+      float outline = 1.0 - smoothstep(0.05, mix(0.35, 0.1, edgeThick), edge) * 0.6 * intensity;
+
+      // Warm color shift (Ghibli palette tends warm)
+      vec3 warmShift = saturated * vec3(1.02, 1.0, 0.95);
+
+      vec3 result = warmShift * outline;
+      out_FragColor = vec4(mix(color.rgb, result, intensity), color.a);
+    }
+  `,
+};