Implement camera clipping for ortho maps

1 files changed, 11 insertions, 8 deletions

diff --git a/include/isogfx/gfx2d.h b/include/isogfx/gfx2d.h
index a3ddbb6..33a4591 100644
--- a/include/isogfx/gfx2d.h
+++ b/include/isogfx/gfx2d.h
@@ -110,15 +110,8 @@ void gfx2d_set_sprite_animation(Gfx2d*, Sprite, int animation);
 /// Currently, this updates the sprite animations.
 void gfx2d_update(Gfx2d*, double t);
 
-// TODO: Do we really need to store the camera in the library? It's not used
-//  for anything other than to render, so we could remove library state and
-//  take a camera argument in render() instead.
-
-/// Set the camera.
-void gfx2d_set_camera(Gfx2d*, int x, int y);
-
 /// Render the world.
-void gfx2d_render(Gfx2d*);
+void gfx2d_render(Gfx2d*, int camera_x, int camera_y);
 
 /// Draw/overlay a tile at position (x,y).
 ///
@@ -127,6 +120,16 @@ void gfx2d_render(Gfx2d*);
 /// position (x,y) instead, use gfx2d_set_tile().
 void gfx2d_draw_tile(Gfx2d*, int x, int y, Tile);
 
+/// Clip camera coordinates to the loaded map.
+///
+/// This is useful for implementing camera movement, in which you typically
+/// want the camera to stay within the map's bounds.
+///
+/// (x,y) are the top-left coordinates of the camera.
+///
+/// A map must have previously been loaded.
+void gfx2d_clip_camera(const Gfx2d*, float* x, float* y);
+
 /// Get the virtual screen's dimensions.
 void gfx2d_get_screen_size(const Gfx2d*, int* width, int* height);