Add existing to tracked

node_modules/@cesium/engine/Source/Shaders/PrimitiveGaussianSplatFS.glsl

@@ -0,0 +1,18 @@
+//
+// Fragment shader for Gaussian splats.
+// Renders a Gaussian splat within a quad, discarding fragments outside the unit circle.
+// Applies an approximate Gaussian falloff based on distance from the center and outputs
+// a color modulated by the alpha and Gaussian weight.
+//
+void main() {
+    if (v_splitDirection < 0.0 && gl_FragCoord.x > czm_splitPosition) discard;
+    if (v_splitDirection > 0.0 && gl_FragCoord.x < czm_splitPosition) discard;
+
+    float A = -dot(v_vertPos, v_vertPos);
+    if (A < -4.) {
+        discard;
+    }
+
+    float B = exp(A * 4.) * v_splatColor.a ;
+    out_FragColor = vec4(v_splatColor.rgb * B , B);
+}