public Face2D Build(CameraScene cameraScene, CirclePrimitive player, CirclePrimitive target)
{
// 3 steps:
// 1. Make face from room bounds
// 2. For each primitive make the occlusion field and cut it from the face
// 3. Cut middle zone from the face, in this zone both the player and the target are visible,
// but there aren't any camera angle to see them both
Face2D res = MakeStartField(cameraScene.RoomBound);
BooleanOperator bop = new BooleanOperator();
foreach (var circle_obstacle in cameraScene.Circles)
{
res = bop.Intersect(res, MakeOcclusionLoop(player, circle_obstacle, -0.1f));
}
res = bop.Intersect(res, MakeOcclusionLoop(player, target, 0.0f));
foreach (var circle_obstacle in cameraScene.Circles)
{
res = bop.Intersect(res, MakeOcclusionLoop(target, circle_obstacle, 0.1f));
}
res = bop.Intersect(res, MakeMiddleZone(player, target));
return(res);
}
