implement torch on wall

src/js/net/minecraft/client/world/block/Block.js

@@ -64,6 +64,14 @@ window.Block = class {
         return this.boundingBox;
     }
 
+    onBlockAdded(world, x, y, z) {
+
+    }
+
+    onBlockPlaced(world, x, y, z, face) {
+
+    }
+
     collisionRayTrace(x, y, z, start, end) {
         start = start.addVector(-x, -y, -z);
         end = end.addVector(-x, -y, -z);

src/js/net/minecraft/client/world/block/BlockTorch.js

@@ -4,6 +4,14 @@ window.BlockTorch = class extends Block {
         super(id, textureSlotId);
 
         this.boundingBox = new BoundingBox(0.4, 0.0, 0.4, 0.6, 0.6, 0.6);
+
+        this.dataFaces = [
+            EnumBlockFace.WEST,
+            EnumBlockFace.EAST,
+            EnumBlockFace.NORTH,
+            EnumBlockFace.SOUTH,
+            EnumBlockFace.BOTTOM,
+        ]
     }
 
     getLightValue() {
@@ -17,4 +25,30 @@ window.BlockTorch = class extends Block {
     getRenderType() {
         return BlockRenderType.TORCH;
     }
+
+    onBlockAdded(world, x, y, z) {
+        for (let i = this.dataFaces.length - 1; i >= 0; i--) {
+            let dataFace = this.dataFaces[i];
+
+            if (world.isSolidBlockAt(x + dataFace.x, y + dataFace.y, z + dataFace.z)) {
+                world.setBlockDataAt(x, y, z, i + 1);
+                break;
+            }
+        }
+    }
+
+    onBlockPlaced(world, x, y, z, face) {
+        let meta = world.getBlockDataAt(x, y, z);
+
+        for (let i in this.dataFaces) {
+            let dataFace = this.dataFaces[i];
+
+            if (face === dataFace.opposite() && world.isSolidBlockAt(x + dataFace.x, y + dataFace.y, z + dataFace.z)) {
+                meta = parseInt(i) + 1;
+                break;
+            }
+        }
+
+        world.getChunkSectionAt(x >> 4, y >> 4, z >> 4).setBlockDataAt(x & 15, y & 15, z & 15, meta);
+    }
 }