Add existing to tracked

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

@@ -0,0 +1,25 @@
+uniform vec4 color;
+uniform float glowPower;
+uniform float taperPower;
+
+czm_material czm_getMaterial(czm_materialInput materialInput)
+{
+    czm_material material = czm_getDefaultMaterial(materialInput);
+
+    vec2 st = materialInput.st;
+    float glow = glowPower / abs(st.t - 0.5) - (glowPower / 0.5);
+
+    if (taperPower <= 0.99999) {
+        glow *= min(1.0, taperPower / (0.5 - st.s * 0.5) - (taperPower / 0.5));
+    }
+
+    vec4 fragColor;
+    fragColor.rgb = max(vec3(glow - 1.0 + color.rgb), color.rgb);
+    fragColor.a = clamp(glow, 0.0, 1.0) * color.a;
+    fragColor = czm_gammaCorrect(fragColor);
+
+    material.emission = fragColor.rgb;
+    material.alpha = fragColor.a;
+
+    return material;
+}