Prepping map stuff

src/rpg/entity/entity.c

@@ -81,9 +81,11 @@ void entityWalk(entity_t *entity, const entitydir_t direction) {
     // Check one level down for walkable tile (stairs down)
     worldpos_t belowPos = newPos;
     belowPos.z -= 1;
-    tile = mapGetTile(belowPos);
-    
-    if(tile != TILE_NULL) newPos.z -= 1;
+    tile_t belowTile = mapGetTile(belowPos);
+
+    if(belowTile == TILE_STAIRS_UP) {
+      tile = TILE_STAIRS_DOWN;// Mark current as stairs down
+    }
   }
 
   // Tile walkable?
@@ -98,11 +100,19 @@ void entityWalk(entity_t *entity, const entitydir_t direction) {
     return;// Blocked
   } while(++other, other < &ENTITIES[ENTITY_COUNT]);
 
+  entity->lastPosition = entity->position;
   entity->position = newPos;
   entity->animation = ENTITY_ANIM_WALK;
   entity->animTime = ENTITY_ANIM_WALK_DURATION;// TODO: Running vs walking
 
   // We are comitting, we can run effects here.
+  if(tile == TILE_STAIRS_DOWN) {
+    // Moving down a level
+    entity->position.z -= 1;
+  } else if(tile == TILE_STAIRS_UP) {
+    // Moving up a level
+    entity->position.z += 1;
+  }
 }
 
 entity_t * entityGetAt(const worldpos_t position) {

src/rpg/entity/entity.h

@@ -23,6 +23,7 @@ typedef struct entity_s {
   // Movement
   entitydir_t direction;
   worldpos_t position;
+  worldpos_t lastPosition;
 
   entityanim_t animation;
   float_t animTime;