added belt extensions to the 3D model

assets/rebuild.sh

@@ -5,7 +5,7 @@ montage textures/lab1/underg_*_base.png textures/lab1/underg_*_shadow.png \
 montage textures/processor/processor_*_base.png textures/processor/processor_*_shadow.png \
     -background none -geometry 144x144 -tile 6x2 textures/processor.png
 montage textures/belt/belt_*_base.png textures/belt/belt_*_shadow.png \
-    -background none -geometry 42x42 -tile 8x8 -depth 8 textures/belt.png
+    -background none -geometry 42x42 -tile 9x8 -depth 8 textures/belt.png
 montage textures/lab1/lab1_*_base.png textures/lab1/lab1_*_shadow.png \
     -background none -geometry 256x256 -tile 6x2 -depth 8 textures/lab1.png
 montage textures/base/base_*_base.png textures/base/base_*_shadow.png \

src/sprites.rs

@@ -130,6 +130,21 @@ impl EntitySprite {
         }
     }
 
+    pub fn belt_ext_dir(dir: Dir) -> EntitySprite {
+        let idx = match dir {
+            Dir::R => 32,
+            Dir::L => 34,
+            Dir::D => 33,
+            Dir::U => 35,
+        };
+
+        Self {
+            collection_index: SC_BELT_IDX,
+            texture_index: idx,
+            shadow_offs: 32,
+        }
+    }
+
     pub fn belt_dir(dir: Dir) -> EntitySprite {
         let idx = match dir {
             Dir::R => 0,
@@ -141,7 +156,7 @@ impl EntitySprite {
         Self {
             collection_index: SC_BELT_IDX,
             texture_index: idx,
-            shadow_offs: 32,
+            shadow_offs: 36,
         }
     }
 
@@ -366,7 +381,7 @@ impl SpriteAssets {
             .push(SpriteCollection::from_image(tiles, 32, 16, 16));
         // SC_BELT_IDX 1
         self.collections
-            .push(SpriteCollection::from_image(belt_tx, 42, 8, 8));
+            .push(SpriteCollection::from_image(belt_tx, 42, 9, 8));
         // SC_LAB_IDX 2
         self.collections
             .push(SpriteCollection::from_image(lab1_tx, 256, 6, 2));