1 files changed, 87 insertions, 0 deletions
diff --git a/src/world.odin b/src/world.odin
new file mode 100644
index 0000000..d0e6c74
--- /dev/null
+++ b/src/world.odin
@@ -0,0 +1,87 @@
+package demonchime
+
+import "core:log"
+
+import rl "vendor:raylib"
+
+current_room: Room_Position_Resource
+
+open_room_at :: proc(pos: [2]i32) -> bool {
+  pos := pos
+  pos += {current_room.x, current_room.y}
+
+  log.debug("trying to change room...", pos)
+  for room_pos in world {
+    if room_pos.id == current_room.id {
+      continue
+    }
+
+    if pos.x >= room_pos.x && pos.x <= room_pos.x + room_pos.width \
+    && pos.y >= room_pos.y && pos.y <= room_pos.y + room_pos.height {
+      current_room = room_pos
+      return true
+    }
+  }
+  return false
+}
+
+open_room :: proc(id: Room_Id) -> bool {
+  for room_pos in world {
+    if room_pos.id == id {
+      current_room = room_pos
+      return true
+    }
+  }
+
+  return false
+}
+
+draw_room :: proc(id: Room_Id) {
+  draw_tile :: proc(x: i32, y: i32, tile_id: u32) {
+    tile := tiles[tile_id]
+    tileset := tilesets[tile.tileset]
+    rl.DrawTexturePro(
+      get_image(tileset.image),
+      rl.Rectangle{
+        x = f32(tile.rect.start.x),
+        y = f32(tile.rect.start.y),
+        width = f32(tile.rect.size.x),
+        height = f32(tile.rect.size.y),
+      },
+      rl.Rectangle{
+        x = f32(x),
+        y = f32(y),
+        width = f32(tile.rect.size.x),
+        height = f32(tile.rect.size.y),
+      },
+      {0, 0},
+      0,
+      rl.WHITE,
+    )
+  }
+  
+  iterate_room_tiles(id, draw_tile)
+}
+
+Map_Iterate_Callback :: proc(i32, i32, u32)
+
+iterate_room_tiles :: proc(id: Room_Id, callback: Map_Iterate_Callback) {
+  room := get_room(id)
+
+  for layer in room.layers {
+    x: i32 = 0
+    y: i32 = 0
+
+    for cell, i in layer {
+      if cell > 0 {
+        callback(x, y, cell - 1)
+      }
+
+      x += room.tile_width
+      if x > (room.width - 1) * room.tile_width {
+        x = 0
+        y += room.tile_height
+      }
+    }
+  }
+}