public void CollisionResponse(ICollidable other)
{
var wall = other as Wall;
if (wall != null)
{
var current = _camera.GetPosition();
var bbox = wall.BoundingBox;
// player must be somewhere between _last and current but current could be inside bbox, so clamp
var updated = current;
const float minDistanceFromWall = 1f;
if (_last.X <= bbox.Min.X - minDistanceFromWall && current.X >= bbox.Min.X - minDistanceFromWall)
{
// player was on left and moved right
updated.X = bbox.Min.X - minDistanceFromWall;
}
else if (_last.X >= bbox.Max.X + minDistanceFromWall && current.X <= bbox.Max.X + minDistanceFromWall)
{
// player was on right and moved left
updated.X = bbox.Max.X + minDistanceFromWall;
}
if (_last.Z <= bbox.Min.Z - minDistanceFromWall && current.Z >= bbox.Min.Z - minDistanceFromWall)
{
// player was in front and moved back
updated.Z = bbox.Min.Z - minDistanceFromWall;
}
else if (_last.Z >= bbox.Max.Z + minDistanceFromWall && current.Z <= bbox.Max.Z + minDistanceFromWall)
{
// player was back and moved forward
updated.Z = bbox.Max.Z + minDistanceFromWall;
}
_camera.SetPosition(updated);
}
else
{
throw new NotSupportedException("Currently player only supports collision with walls. Add collision logic for other objects here.");
}
}