Remove all references to PyOpenGL in mesh shader module

Author: einarf

demosys/scene/shaders.py

@@ -1,19 +1,20 @@
+import moderngl as mgl
 import os
 
 from pyrr import Matrix33
 
+from demosys import context
 from demosys.conf import settings
 from demosys.resources import shaders
 
-from OpenGL import GL
-
 settings.add_shader_dir(os.path.join(os.path.dirname(__file__), 'shaders'))
 
 
 class MeshShader:
 
     def __init__(self, shader=None, **kwargs):
         self.shader = shader
+        self.ctx = context.ctx()
 
     def draw(self, mesh, proj_mat, view_mat):
         """Minimal draw function. Should be overridden"""
@@ -54,9 +55,9 @@ def draw(self, mesh, proj_mat, view_mat):
 
         if mesh.material:
             if mesh.material.double_sided:
-                GL.glDisable(GL.GL_CULL_FACE)
+                self.ctx.disable(mgl.CULL_FACE)
             else:
-                GL.glEnable(GL.GL_CULL_FACE)
+                self.ctx.enable(mgl.CULL_FACE)
 
             if mesh.material.color:
                 self.shader.uniform("color", tuple(mesh.material.color))
@@ -93,9 +94,9 @@ def draw(self, mesh, proj_mat, view_mat):
         m_normal = self.create_normal_matrix(view_mat)
 
         if mesh.material.double_sided:
-            GL.glDisable(GL.GL_CULL_FACE)
+            self.ctx.disable(mgl.CULL_FACE)
         else:
-            GL.glEnable(GL.GL_CULL_FACE)
+            self.ctx.enable(mgl.CULL_FACE)
 
         mesh.material.mat_texture.texture.use()
         self.shader.uniform("texture0", 0)