Implement sprite depth sorting

This algorithm draws the level in two passes; the ground and rail tiles
are drawn first, then the train cars and walls. This method isn't
perfect, but it'll do for now.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/train.h b/src/train.h
index d47818e..c496db8 100644
--- a/src/train.h
+++ b/src/train.h
@@ -14,6 +14,7 @@ public:
 	void draw(Bitmap&, int, int);
 
 	void setPosition(int x, int y);
+	Point2D getSpritePosition() const;
 	void setSpeed(float speed) { m_speed = speed; };
 	// Add a vehicle to the end of this train
 	void addVehicle(Train*);