feat(all): 迁移扩展相关功能

2026-04-08 15:34:43 +08:00
parent ad2dd979eb
commit d7c0dba569
278 changed files with 25207 additions and 62 deletions
@@ -0,0 +1,22 @@
+precision highp float;
+precision highp int;
+
+#include <utils>
+#include <cylinder_utils>
+
+in vec3 oldPos;
+in vec3 newPos;
+in vec3 ray;
+
+out vec4 fragColor;
+
+void main() {
+  float oldArea = length(dFdx(oldPos)) * length(dFdy(oldPos));
+  float newArea = length(dFdx(newPos)) * length(dFdy(newPos));
+  fragColor = vec4(oldArea / newArea * 0.2, 1.0, 0.0, 0.0);
+
+  vec3 refractedLight = refract(-light, vec3(0.0, 1.0, 0.0), IOR_AIR / IOR_WATER);
+
+  vec2 t = intersectCylinder(newPos, -refractedLight, poolRadius, -poolHeight, poolHeight * 2.0);
+  fragColor.r *= 1.0 / (1.0 + exp(-200.0 / (1.0 + 10.0 * (t.y - t.x)) * (newPos.y - refractedLight.y * t.y - poolHeight * 2.0 / 12.0)));
+}
@@ -0,0 +1,42 @@
+out vec3 oldPos;
+out vec3 newPos;
+out vec3 ray;
+in vec3 position;
+
+#include <utils>
+#include <cylinder_utils>
+
+
+vec3 project(vec3 origin, vec3 ray, vec3 refractedLight) {
+  vec2 tcyl = intersectCylinder(origin, ray, poolRadius, -poolHeight, poolHeight * 2.0);
+  origin += ray * tcyl.y;
+  float tplane = (-origin.y - poolHeight) / refractedLight.y;
+
+  return origin + refractedLight * tplane;
+}
+
+
+void main() {
+  // Collapse vertices outside the unit circle to avoid degenerate caustic triangles
+  if (position.x * position.x + position.y * position.y > 1.0) {
+    oldPos = vec3(0.0);
+    newPos = vec3(0.0);
+    ray = vec3(0.0);
+    gl_Position = vec4(0.0);
+    return;
+  }
+
+  vec4 info = texture(water, position.xy * 0.5 + 0.5);
+  info.ba *= 0.5;
+  vec3 normal = vec3(info.b, sqrt(1.0 - dot(info.ba, info.ba)), info.a);
+
+  vec3 refractedLight = refract(-light, vec3(0.0, 1.0, 0.0), IOR_AIR / IOR_WATER);
+  vec3 basePos = vec3(position.x * poolRadius, 0.0, position.y * poolRadius);
+  ray = refract(-light, normal, IOR_AIR / IOR_WATER);
+  oldPos = project(basePos, refractedLight, refractedLight);
+  newPos = project(basePos + vec3(0.0, info.r, 0.0), ray, refractedLight);
+
+  vec2 normalizedPos = newPos.xz / poolRadius;
+  vec2 refractedOffset = (refractedLight.xz / poolRadius) / refractedLight.y;
+  gl_Position = vec4(0.75 * (normalizedPos + refractedOffset), 0.0, 1.0);
+}