Merge pull request #1291 from eliwhitfield-dot/patch-2

Create black_hole.js

mods/black_hole.js

@@ -0,0 +1,43 @@
+elements.black_hole = {
+    color: "#000000",
+    tick: function(pixel) {
+        // Attract other pixels within a 9-pixel radius
+        for (let dx = -9; dx <= 9; dx++) {
+            for (let dy = -9; dy <= 9; dy++) {
+                let x = pixel.x + dx;
+                let y = pixel.y + dy;
+
+                // Ignore out-of-bounds
+                if (!isEmpty(x, y, true)) {
+                    let other = pixelMap[x]?.[y];
+                    if (other && other.element !== "black_hole") {
+                        // Attraction: move other pixel towards the black hole
+                        let stepX = Math.sign(pixel.x - other.x);
+                        let stepY = Math.sign(pixel.y - other.y);
+                        tryMove(other, other.x + stepX, other.y + stepY);
+                    }
+                }
+            }
+        }
+
+        // Convert touching pixels into black holes
+        const dirs = [
+            [1, 0], [-1, 0], [0, 1], [0, -1],
+            [1, 1], [-1, -1], [1, -1], [-1, 1]
+        ];
+        for (let d of dirs) {
+            let nx = pixel.x + d[0];
+            let ny = pixel.y + d[1];
+            if (isEmpty(nx, ny, true)) continue;
+
+            let touching = pixelMap[nx]?.[ny];
+            if (touching && touching.element !== "black_hole") {
+                changePixel(touching, "black_hole");
+            }
+        }
+    },
+    category: "special",
+    state: "solid",
+    density: 99999, // Very dense (optional)
+    hardness: 1, // Can't be destroyed easily
+};