Add existing to tracked

2026-08-11 09:53:42 -04:00
parent afe07f3055
commit ffd6e3d73c
8531 changed files with 4396230 additions and 0 deletions
@@ -0,0 +1,31 @@
+/**
+ * Compositing for Weighted Blended Order-Independent Transparency. See:
+ * - http://jcgt.org/published/0002/02/09/
+ * - http://casual-effects.blogspot.com/2014/03/weighted-blended-order-independent.html
+ */
+
+uniform sampler2D u_opaque;
+uniform sampler2D u_accumulation;
+uniform sampler2D u_revealage;
+
+in vec2 v_textureCoordinates;
+
+void main()
+{
+    vec4 opaque = texture(u_opaque, v_textureCoordinates);
+    vec4 accum = texture(u_accumulation, v_textureCoordinates);
+    float r = texture(u_revealage, v_textureCoordinates).r;
+
+#ifdef MRT
+    vec4 transparent = vec4(accum.rgb / clamp(r, 1e-4, 5e4), accum.a);
+#else
+    vec4 transparent = vec4(accum.rgb / clamp(accum.a, 1e-4, 5e4), r);
+#endif
+
+    out_FragColor = (1.0 - transparent.a) * transparent + transparent.a * opaque;
+
+    if (opaque != czm_backgroundColor)
+    {
+        out_FragColor.a = 1.0;
+    }
+}