Add existing to tracked

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

@@ -0,0 +1,18 @@
+uniform vec4 lightColor;
+uniform vec4 darkColor;
+uniform vec2 repeat;
+
+czm_material czm_getMaterial(czm_materialInput materialInput)
+{
+    czm_material material = czm_getDefaultMaterial(materialInput);
+
+    // From Stefan Gustavson's Procedural Textures in GLSL in OpenGL Insights
+    float b = smoothstep(0.3, 0.32, length(fract(repeat * materialInput.st) - 0.5));  // 0.0 or 1.0
+
+    vec4 color = mix(lightColor, darkColor, b);
+    color = czm_gammaCorrect(color);
+    material.diffuse = color.rgb;
+    material.alpha = color.a;
+
+    return material;
+}