SimpleShadowManager = ref object of ShadowManager
  depth_range*: (float32, float32)
  caster_bounding_points*: seq[Vec3]
  use_camera*: bool

proc newSimpleShadowManager(light: Light; use_camera: bool;
                            near, far: float32 = 0.0): SimpleShadowManager {.
    discardable, ...raises: [Exception], tags: [RootEffect].}

proc renderShadow(self: SimpleShadowManager; scene: Scene;
                  bounding_points: seq[Vec3]; sphere_center: Vec3 = vec3(0);
                  sphere_radius: float32 = 0; min_z: float32 = 0) {.
    ...raises: [Exception, ValueError], tags: [RootEffect].}

proc renderShadowWithCamera(self: SimpleShadowManager; camera: Camera) {.
    ...raises: [Exception, ValueError], tags: [RootEffect].}

method destroy(self: SimpleShadowManager) {.locks: "unknown",
    ...raises: [Exception], tags: [RootEffect].}

method renderShadow(self: SimpleShadowManager; camera: Camera): bool {.
    locks: "unknown", ...raises: [Exception, ValueError], tags: [RootEffect].}