Add existing to tracked

node_modules/@cesium/engine/Source/Scene/getClipAndStyleCode.js

@@ -0,0 +1,34 @@
+import Check from "../Core/Check.js";
+
+/**
+ * Gets a GLSL snippet that clips a fragment using the `clip` function from {@link getClippingFunction} and styles it.
+ *
+ * @param {string} samplerUniformName Name of the uniform for the clipping planes texture sampler.
+ * @param {string} matrixUniformName Name of the uniform for the clipping planes matrix.
+ * @param {string} styleUniformName Name of the uniform for the clipping planes style, a vec4.
+ * @returns {string} A string containing GLSL that clips and styles the current fragment.
+ * @private
+ */
+function getClipAndStyleCode(
+  samplerUniformName,
+  matrixUniformName,
+  styleUniformName,
+) {
+  //>>includeStart('debug', pragmas.debug);
+  Check.typeOf.string("samplerUniformName", samplerUniformName);
+  Check.typeOf.string("matrixUniformName", matrixUniformName);
+  Check.typeOf.string("styleUniformName", styleUniformName);
+  //>>includeEnd('debug');
+
+  const shaderCode =
+    `    float clipDistance = clip(gl_FragCoord, ${samplerUniformName}, ${matrixUniformName}); \n` +
+    `    vec4 clippingPlanesEdgeColor = vec4(1.0); \n` +
+    `    clippingPlanesEdgeColor.rgb = ${styleUniformName}.rgb; \n` +
+    `    float clippingPlanesEdgeWidth = ${styleUniformName}.a; \n` +
+    `    if (clipDistance > 0.0 && clipDistance < clippingPlanesEdgeWidth) \n` +
+    `    { \n` +
+    `        out_FragColor = clippingPlanesEdgeColor;\n` +
+    `    } \n`;
+  return shaderCode;
+}
+export default getClipAndStyleCode;