fixed dev vs build mismatch

Author: vismaychuriwala

package-lock.json

@@ -5,7 +5,8 @@
   "type": "module",
   "scripts": {
     "dev": "vite --open",
-    "build": "vite build && cp -r scenes/ dist/"
+    "build": "vite build && cp -r scenes/ dist/",
+    "preview": "vite preview --port 4173 --strictPort --host"
   },
   "devDependencies": {
     "@types/dat.gui": "^0.7.13",

package.json

@@ -44,8 +44,16 @@ export const constants = {
 
 // =================================
 
+const constantPattern = /\$\{([a-zA-Z_]\w*)\}/g;
+
 function evalShaderRaw(raw: string) {
-    return eval('`' + raw.replaceAll('${', '${constants.') + '`');
+    return raw.replace(constantPattern, (_match, key: string) => {
+        const value = constants[key as keyof typeof constants];
+        if (value === undefined) {
+            throw new Error(`Unknown shader constant: ${key}`);
+        }
+        return String(value);
+    });
 }
 
 const commonSrc: string = evalShaderRaw(commonRaw);