1 files changed, 37 insertions, 7 deletions
diff --git a/codegen/lib/code/shapes.py b/codegen/lib/code/shapes.py
index e65e4028..9cf3093a 100644
--- a/codegen/lib/code/shapes.py
+++ b/codegen/lib/code/shapes.py
@@ -8,11 +8,43 @@ COLLISION_BLOCKS_RS_DIR = get_dir_location(
 
 
 def generate_block_shapes(blocks: dict, shapes: dict, block_states_report, block_datas_burger, mappings: Mappings):
-    code = generate_block_shapes_code(blocks, shapes, block_states_report, block_datas_burger, mappings)
+    blocks, shapes = simplify_shapes(blocks, shapes)
+
+    code = generate_block_shapes_code(
+        blocks, shapes, block_states_report, block_datas_burger, mappings)
     with open(COLLISION_BLOCKS_RS_DIR, 'w') as f:
         f.write(code)
 
 
+def simplify_shapes(blocks: dict, shapes: dict):
+    shape_to_new_id = {}
+    new_id_increment = 0
+
+    new_shapes = {}
+    old_id_to_new_id = {}
+
+    for shape_id, shape in sorted(shapes.items(), key=lambda shape: int(shape[0])):
+        # tuples are hashable
+        shape_as_tuple = tuple(map(tuple, shape))
+        if shape_as_tuple not in shape_to_new_id:
+            shape_to_new_id[shape_as_tuple] = new_id_increment
+            old_id_to_new_id[shape_id] = new_id_increment
+            new_shapes[new_id_increment] = shape
+            new_id_increment += 1
+        else:
+            old_id_to_new_id[shape_id] = shape_to_new_id[shape_as_tuple]
+
+    # now map the blocks to the new shape ids
+    for block_id, shape_ids in blocks.items():
+        if isinstance(shape_ids, int):
+            blocks[block_id] = old_id_to_new_id[str(shape_ids)]
+        else:
+            blocks[block_id] = [old_id_to_new_id[str(shape_id)]
+                                for shape_id in shape_ids]
+
+    return blocks, new_shapes
+
+
 def generate_block_shapes_code(blocks: dict, shapes: dict, block_states_report, block_datas_burger, mappings: Mappings):
     # look at downloads/generator-mod-*/blockCollisionShapes.json for format of blocks and shapes
 
@@ -39,7 +71,7 @@ def generate_block_shapes_code(blocks: dict, shapes: dict, block_states_report,
             variant_values = []
             for value in tuple(possible_state.get('properties', {}).values()):
                 variant_values.append(to_camel_case(value))
-            
+
             if variant_values == []:
                 variant_name = to_camel_case(block_id)
             else:
@@ -47,13 +79,13 @@ def generate_block_shapes_code(blocks: dict, shapes: dict, block_states_report,
 
             if shape_id not in shape_ids_to_variants:
                 shape_ids_to_variants[shape_id] = []
-            shape_ids_to_variants[shape_id].append(f'BlockState::{variant_name}')
+            shape_ids_to_variants[shape_id].append(
+                f'BlockState::{variant_name}')
     # shape 1 is the most common so we have a _ => &SHAPE1 at the end
     del shape_ids_to_variants[1]
     for shape_id, variants in shape_ids_to_variants.items():
         generated_match_inner_code += f'{"|".join(variants)} => &SHAPE{shape_id},\n'
 
-
     return f'''
 //! Autogenerated block collisions for every block
 
@@ -67,7 +99,7 @@ use crate::collision::{{self, Shapes}};
 use azalea_block::*;
 use lazy_static::lazy_static;
 
-trait BlockWithShape {{
+pub trait BlockWithShape {{
     fn shape(&self) -> &'static VoxelShape;
 }}
 
@@ -106,5 +138,3 @@ def generate_code_for_shape(shape_id: str, parts: list[list[float]]):
         code += f'    {steps[-1]}\n'
         code += '};\n'
     return code
-
-