Answers

Exercise A:

The code only differs from loading the teapot since it loads the granny model:

quat_granny = Object(“Granny”)
quat_granny.add_component(Transform())
mat = Material(“shaders/texturedvert.vs”, 
               “shaders/texturedfrag.vs”)
quat_granny.add_component(LoadMesh(quat_granny.vao_ref,
    mat,GL_TRIANGLES, “models/granny.obj”, 
    “images/granny.png”))
quat_granny.add_component(mat)
quat_trans: Transform =
    quat_granny.get_component(Transform)
quat_trans.update_position(pygame.Vector3(0, -100, -200))

In the fragment shader, remove the normal from the setup of frag_color (if you aren’t on Windows and haven’t commented out all the error-producing code), like this:

frag_color = vec4(1,1,1,1)