Add chaos surge mechanic to Stack Blocks Chaos

src/spawn.js

@@ -471,6 +471,74 @@
       spawnCount = 0;
     };
 
+    const spawnRowAtY = ({
+      y,
+      columns: columnsOverride,
+      jitter = 0,
+      markEntered = false,
+    } = {}) => {
+      const scene = getCurrentScene();
+      const sceneConfig = scene?.config || {};
+      const columns =
+        Number.isFinite(columnsOverride) && columnsOverride > 0
+          ? columnsOverride
+          : sceneConfig.spawnColumns;
+      if (!Number.isFinite(columns) || columns <= 0) return 0;
+      const { width, height } = getDimensions();
+      const insets = getSpawnInsets();
+      const squareArea = getSquarePlayArea();
+      const usableWidth = Math.max(
+        0,
+        (squareArea ? squareArea.size : width) - insets.left - insets.right,
+      );
+      const columnWidth = usableWidth / columns;
+      const minX =
+        (squareArea ? squareArea.left : 0) +
+        insets.left +
+        config.ballRadius +
+        2;
+      const maxX =
+        (squareArea ? squareArea.left + squareArea.size : width) -
+        insets.right -
+        config.ballRadius -
+        2;
+      const baseY =
+        typeof y === "number"
+          ? y
+          : (squareArea ? squareArea.top + squareArea.size : height) -
+            config.ballRadius * 1.1;
+      for (let c = 0; c < columns; c += 1) {
+        const jitterX = (Math.random() - 0.5) * jitter;
+        const x =
+          (squareArea ? squareArea.left : 0) +
+          insets.left +
+          columnWidth * (c + 0.5) +
+          jitterX;
+        const safeX = Math.max(minX, Math.min(maxX, x));
+        const color =
+          config.palette[Math.floor(Math.random() * config.palette.length)];
+        const blob = createBallBodies(safeX, baseY, color);
+        blob.bodies.forEach((body) => {
+          body.plugin = body.plugin || {};
+          body.plugin.hasEntered = !!markEntered;
+          if (body.plugin.entryCheckId) {
+            clearTimeout(body.plugin.entryCheckId);
+            body.plugin.entryCheckId = null;
+          }
+          balls.push(body);
+          World.add(world, body);
+        });
+        if (blob.constraints.length > 0) {
+          World.add(world, blob.constraints);
+        }
+        if (blob.constraints.length > 0 && blob.blobId) {
+          blobConstraints.set(blob.blobId, blob.constraints);
+        }
+      }
+      spawnCount += columns;
+      return columns;
+    };
+
     return {
       startSpawner,
       stopSpawner,
@@ -482,6 +550,7 @@
       cleanupBall,
       removeBlob,
       resetSpawnState,
+      spawnRowAtY,
     };
   };