Add existing to tracked

node_modules/@cesium/engine/Source/Shaders/Materials/FadeMaterial.js

@@ -0,0 +1,39 @@
+//This file is automatically rebuilt by the Cesium build process.
+export default "uniform vec4 fadeInColor;\n\
+uniform vec4 fadeOutColor;\n\
+uniform float maximumDistance;\n\
+uniform bool repeat;\n\
+uniform vec2 fadeDirection;\n\
+uniform vec2 time;\n\
+\n\
+float getTime(float t, float coord)\n\
+{\n\
+    float scalar = 1.0 / maximumDistance;\n\
+    float q  = distance(t, coord) * scalar;\n\
+    if (repeat)\n\
+    {\n\
+        float r = distance(t, coord + 1.0) * scalar;\n\
+        float s = distance(t, coord - 1.0) * scalar;\n\
+        q = min(min(r, s), q);\n\
+    }\n\
+    return clamp(q, 0.0, 1.0);\n\
+}\n\
+\n\
+czm_material czm_getMaterial(czm_materialInput materialInput)\n\
+{\n\
+    czm_material material = czm_getDefaultMaterial(materialInput);\n\
+\n\
+    vec2 st = materialInput.st;\n\
+    float s = getTime(time.x, st.s) * fadeDirection.s;\n\
+    float t = getTime(time.y, st.t) * fadeDirection.t;\n\
+\n\
+    float u = length(vec2(s, t));\n\
+    vec4 color = mix(fadeInColor, fadeOutColor, u);\n\
+\n\
+    color = czm_gammaCorrect(color);\n\
+    material.emission = color.rgb;\n\
+    material.alpha = color.a;\n\
+\n\
+    return material;\n\
+}\n\
+";