Don't draw shapes/sprites with zero scaling factor.

bemani/format/afp/render.py

@@ -297,7 +297,11 @@ class AFPRenderer(VerboseOutput):
         transform = parent_transform.multiply(renderable.tag.transform or Matrix.identity())
 
         # Calculate the inverse so we can map canvas space back to texture space.
+        try:
             inverse = transform.inverse()
+        except ZeroDivisionError:
+            print(f"WARNING: Transform Matrix {transform} has zero scaling factor, making it non-invertible!")
+            return
 
         # Render individual shapes if this is a sprite.
         if renderable.tag.source_tag_id in self.__registered_sprites:

bemani/format/afp/types/generic.py

@@ -123,6 +123,7 @@ class Matrix:
     def inverse(self) -> "Matrix":
         denom = (self.a * self.d - self.b * self.c)
 
+        try:
             return Matrix(
                 a=self.d / denom,
                 b=-self.b / denom,
@@ -131,6 +132,10 @@ class Matrix:
                 tx=(self.c * self.ty - self.d * self.tx) / denom,
                 ty=-(self.a * self.ty - self.b * self.tx) / denom,
             )
+        except ZeroDivisionError:
+            pass
+
+        raise ZeroDivisionError(f"Matrix({self}) cannot be inverted!")
 
     def __repr__(self) -> str:
         return f"a: {round(self.a, 5)}, b: {round(self.b, 5)}, c: {round(self.c, 5)}, d: {round(self.d, 5)}, tx: {round(self.tx, 5)}, ty: {round(self.ty, 5)}"