Tilemaps can now load their own physics engines from map properties. The gravity for the arcade simulation is acting a little funny when populated from the map properties.

include/akgl/tilemap.h

@@ -2,8 +2,9 @@
 #define _TILEMAP_H_
 
 #include <limits.h>
-#include "actor.h"
-#include "staticstring.h"
+#include <akgl/actor.h>
+#include <akgl/staticstring.h>
+#include <akgl/physics.h>
 #include <jansson.h>
 
 #define AKGL_TILEMAP_MAX_WIDTH                        512
@@ -98,6 +99,10 @@ typedef struct {
     float p_rate;
     akgl_Tileset tilesets[AKGL_TILEMAP_MAX_TILESETS];
     akgl_TilemapLayer layers[AKGL_TILEMAP_MAX_LAYERS];
+
+    // Different levels may have different physics.
+    bool use_own_physics;
+    akgl_PhysicsBackend physics;
 } akgl_Tilemap;
 
 akerr_ErrorContext AKERR_NOIGNORE *akgl_tilemap_load(char *fname, akgl_Tilemap *dest);