fix aspect_ratio other than 16:9 issue

manimlib/config.py

@@ -13,7 +13,6 @@
 from manimlib.logger import log
 from manimlib.utils.dict_ops import merge_dicts_recursively
 from manimlib.utils.init_config import init_customization
-from manimlib.constants import FRAME_HEIGHT
 
 from typing import TYPE_CHECKING
 if TYPE_CHECKING:
@@ -473,7 +472,7 @@ def get_camera_config(args: Namespace, custom_config: dict) -> dict:
         "pixel_width": width,
         "pixel_height": height,
         "frame_config": {
-            "frame_shape": ((width / height) * FRAME_HEIGHT, FRAME_HEIGHT),
+            "frame_shape": ((width / height) * get_frame_height(), get_frame_height()),
         },
         "fps": fps,
     })
@@ -520,3 +519,18 @@ def get_configuration(args: Namespace) -> dict:
         "embed_exception_mode": custom_config["embed_exception_mode"],
         "embed_error_sound": custom_config["embed_error_sound"],
     }
+
+def get_frame_height():
+    return 8.0
+
+def get_aspect_ratio():
+    cam_config = get_camera_config(parse_cli(), get_custom_config())
+    return cam_config['pixel_width'] / cam_config['pixel_height']
+
+def get_default_pixel_width():
+    cam_config = get_camera_config(parse_cli(), get_custom_config())
+    return cam_config['pixel_width']
+
+def get_default_pixel_height():
+    cam_config = get_camera_config(parse_cli(), get_custom_config())
+    return cam_config['pixel_height']

manimlib/constants.py

@@ -1,22 +1,24 @@
 from __future__ import annotations
 import numpy as np
 
+from manimlib.config import get_aspect_ratio,get_default_pixel_width,get_default_pixel_height,get_frame_height
+
 from typing import TYPE_CHECKING
 if TYPE_CHECKING:
     from typing import List
     from manimlib.typing import ManimColor, Vect3
 
 
 # Sizes relevant to default camera frame
-ASPECT_RATIO: float = 16.0 / 9.0
-FRAME_HEIGHT: float = 8.0
+ASPECT_RATIO: float = get_aspect_ratio()
+FRAME_HEIGHT: float = get_frame_height()
 FRAME_WIDTH: float = FRAME_HEIGHT * ASPECT_RATIO
 FRAME_SHAPE: tuple[float, float] = (FRAME_WIDTH, FRAME_HEIGHT)
 FRAME_Y_RADIUS: float = FRAME_HEIGHT / 2
 FRAME_X_RADIUS: float = FRAME_WIDTH / 2
 
-DEFAULT_PIXEL_HEIGHT: int = 1080
-DEFAULT_PIXEL_WIDTH: int = 1920
+DEFAULT_PIXEL_HEIGHT: int = get_default_pixel_height()
+DEFAULT_PIXEL_WIDTH: int = get_default_pixel_width()
 DEFAULT_FPS: int = 30
 
 SMALL_BUFF: float = 0.1

manimlib/utils/shaders.py

@@ -9,6 +9,7 @@
 
 from manimlib.config import parse_cli
 from manimlib.config import get_configuration
+from manimlib.constants import ASPECT_RATIO
 from manimlib.utils.directories import get_shader_dir
 from manimlib.utils.file_ops import find_file
 
@@ -112,6 +113,8 @@ def get_shader_code_from_file(filename: str) -> str | None:
 
     with open(filepath, "r") as f:
         result = f.read()
+
+        result = re.sub(r"\s+ASPECT_RATIO\s+=\s+[\s0-9/.]+", f" ASPECT_RATIO = {ASPECT_RATIO}", result)
 
     # To share functionality between shaders, some functions are read in
     # from other files an inserted into the relevant strings before