geometry shader for cuboid

Objects/Cube/Cube.py

@@ -6,20 +6,19 @@ import numpy as np
 
 
 class Cube(Object):
-    GeometryShaderId = -1
 
     def __init__(self):
-        Object.__init__(self)
+        super(Cube, self).__init__()
         if (Cube.GeometryShaderId == -1):
             self.initializeShader()
 
-    def initializeShader(self) -> bool:
+    @classmethod
+    def initializeShader(cls) -> bool:
         with open('./Objects/Cube/cube_geometry.glsl', 'r') as f:
             geometry_shader_string = f.read()
-        Cube.GeometryShaderId = glCreateShader(GL_GEOMETRY_SHADER)
+        cls.GeometryShaderId = glCreateShader(GL_GEOMETRY_SHADER)
         glShaderSource(Cube.GeometryShaderId, geometry_shader_string)
         glCompileShader(Cube.GeometryShaderId)
         if glGetShaderiv(Cube.GeometryShaderId, GL_COMPILE_STATUS) != GL_TRUE:
             raise RuntimeError(glGetShaderInfoLog(Cube.GeometryShaderId))
-            return False
-        return True
+        return True