Add existing to tracked

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

@@ -0,0 +1,27 @@
+//This file is automatically rebuilt by the Cesium build process.
+export default "uniform vec4 color;\n\
+uniform float glowPower;\n\
+uniform float taperPower;\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 glow = glowPower / abs(st.t - 0.5) - (glowPower / 0.5);\n\
+\n\
+    if (taperPower <= 0.99999) {\n\
+        glow *= min(1.0, taperPower / (0.5 - st.s * 0.5) - (taperPower / 0.5));\n\
+    }\n\
+\n\
+    vec4 fragColor;\n\
+    fragColor.rgb = max(vec3(glow - 1.0 + color.rgb), color.rgb);\n\
+    fragColor.a = clamp(glow, 0.0, 1.0) * color.a;\n\
+    fragColor = czm_gammaCorrect(fragColor);\n\
+\n\
+    material.emission = fragColor.rgb;\n\
+    material.alpha = fragColor.a;\n\
+\n\
+    return material;\n\
+}\n\
+";