From f326071861796a616155762ffcca40cb07ee13ad Mon Sep 17 00:00:00 2001
From: Zack Buhman <zack@buhman.org>
Date: Wed, 2 Apr 2025 11:49:32 -0500
Subject: [PATCH] frozen dataclasses

---
 generate_cpp.py |  8 ++++++--
 obj.py          | 23 ++++++++++++++++-------
 2 files changed, 22 insertions(+), 9 deletions(-)

diff --git a/generate_cpp.py b/generate_cpp.py
index 62da5d4..5b728fb 100644
--- a/generate_cpp.py
+++ b/generate_cpp.py
@@ -52,7 +52,7 @@ def generate_object_array(group_name, obj_file):
         yield f"&{group_name}_{object.name},"
     yield "};"
 
-def generate_model(group_name):
+def generate_model(group_name, obj_file):
     yield f"const struct model {group_name}_model = {{"
     yield f".position = {group_name}_position,"
     yield f".texture = {group_name}_texture,"
@@ -62,6 +62,10 @@ def generate_model(group_name):
     yield "};"
 
 def generate_obj_file(group_name, obj_file):
+    yield "#pragma once"
+    yield '#include "../model.h"'
+    yield ''
+
     yield from generate_vec(group_name, "position", generate_vec3, obj_file.position)
     yield from generate_vec(group_name, "texture", generate_vec2, obj_file.texture)
     yield from generate_vec(group_name, "normal", generate_vec3, obj_file.normal)
@@ -73,7 +77,7 @@ def generate_obj_file(group_name, obj_file):
         yield from generate_object(group_name, object)
 
     yield from generate_object_array(group_name, obj_file)
-    yield from generate_model(group_name)
+    yield from generate_model(group_name, obj_file)
 
 if __name__ == "__main__":
     obj_file = parse_obj_file(sys.argv[1])
diff --git a/obj.py b/obj.py
index c36c5fb..091260a 100644
--- a/obj.py
+++ b/obj.py
@@ -1,29 +1,30 @@
 from dataclasses import dataclass
 import sys
+import os
 
-@dataclass
+@dataclass(frozen=True)
 class VertexPosition:
     x: float
     y: float
     z: float
 
-@dataclass
+@dataclass(frozen=True)
 class VertexNormal:
     x: float
     y: float
     z: float
 
-@dataclass
+@dataclass(frozen=True)
 class VertexTexture:
     x: float
     y: float
     z: float
 
-@dataclass
+@dataclass(frozen=True)
 class ObjectEvent:
     name: str
 
-@dataclass
+@dataclass(frozen=True)
 class FacePTN:
     position: int
     texture: int
@@ -70,7 +71,15 @@ def parse_float(s):
     f_digits = len(f)
     i = int(i, 10)
     f = int(f, 10)
-    return sign * (i + (f / 10 ** f_digits))
+
+    if 'ROUND_PRECISION' in os.environ:
+        max_digits = 4
+        if f_digits > max_digits:
+            f = int(f / (f_digits - max_digits))
+        f_digits = max_digits
+
+    f_10 = (f / 10 ** f_digits)
+    return sign * (i + f_10)
 
 def parse_vertex(line, n, type):
     assert len(line) == n
@@ -151,7 +160,7 @@ def parse_obj_lines(lines):
             if object.faces:
                 assert object.name != None
                 file.objects.append(object)
-            object = Object(x.name)
+            object = Object(x.name.replace('-', '_').replace('.', '_'))
         elif type(x) is Face:
             object.faces.append(x)
         elif type(x) is Material: