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+"save_to_file/make_streamable": "",
+"save_to_file/path": "res://interior/base/dungeon_01/tiles_endcap_south.res"
+},
+"tiles_endcap_west": {
+"generate/lightmap_uv": 0,
+"generate/lods": 0,
+"generate/shadow_meshes": 0,
+"lods/normal_merge_angle": 60.0,
+"lods/normal_split_angle": 25.0,
+"save_to_file/enabled": true,
+"save_to_file/make_streamable": "",
+"save_to_file/path": "res://interior/base/dungeon_01/tiles_endcap_west.res"
+},
+"tiles_fill": {
+"generate/lightmap_uv": 0,
+"generate/lods": 0,
+"generate/shadow_meshes": 0,
+"lods/normal_merge_angle": 60.0,
+"lods/normal_split_angle": 25.0,
+"save_to_file/enabled": true,
+"save_to_file/make_streamable": "",
+"save_to_file/path": "res://interior/base/dungeon_01/tiles_fill.res"
+},
+"tiles_island": {
+"generate/lightmap_uv": 0,
+"generate/lods": 0,
+"generate/shadow_meshes": 0,
+"lods/normal_merge_angle": 60.0,
+"lods/normal_split_angle": 25.0,
+"save_to_file/enabled": true,
+"save_to_file/make_streamable": "",
+"save_to_file/path": "res://interior/base/dungeon_01/tiles_island.res"
+},
+"tiles_path_horizontal": {
+"generate/lightmap_uv": 0,
+"generate/lods": 0,
+"generate/shadow_meshes": 0,
+"lods/normal_merge_angle": 60.0,
+"lods/normal_split_angle": 25.0,
+"save_to_file/enabled": true,
+"save_to_file/make_streamable": "",
+"save_to_file/path": "res://interior/base/dungeon_01/tiles_path_horizontal.res"
+},
+"tiles_path_vertical": {
+"generate/lightmap_uv": 0,
+"generate/lods": 0,
+"generate/shadow_meshes": 0,
+"lods/normal_merge_angle": 60.0,
+"lods/normal_split_angle": 25.0,
+"save_to_file/enabled": true,
+"save_to_file/make_streamable": "",
+"save_to_file/path": "res://interior/base/dungeon_01/tiles_path_vertical.res"
+}
+}
+}
+gltf/embedded_image_handling=0

interior/floors/dungeon_01_tiles_height.png.import

@@ -3,24 +3,23 @@
 importer="texture"
 type="CompressedTexture2D"
 uid="uid://didp3nfacohwd"
-path.s3tc="res://.godot/imported/tiling_height.png-2ead72b43d4a6de847e50bcbd8e8c7f7.s3tc.ctex"
-path.etc2="res://.godot/imported/tiling_height.png-2ead72b43d4a6de847e50bcbd8e8c7f7.etc2.ctex"
+path.s3tc="res://.godot/imported/dungeon_01_tiles_height.png-7733c18dddd7d5bf80deae891d3de52e.s3tc.ctex"
 metadata={
-"imported_formats": ["s3tc", "etc2"],
+"imported_formats": ["s3tc_bptc"],
 "vram_texture": true
 }
 
 [deps]
 
-source_file="res://interior/tiles/limestone_dungeon/tiling_height.png"
-dest_files=["res://.godot/imported/tiling_height.png-2ead72b43d4a6de847e50bcbd8e8c7f7.s3tc.ctex", "res://.godot/imported/tiling_height.png-2ead72b43d4a6de847e50bcbd8e8c7f7.etc2.ctex"]
+source_file="res://interior/base/dungeon_01_tiles_height.png"
+dest_files=["res://.godot/imported/dungeon_01_tiles_height.png-7733c18dddd7d5bf80deae891d3de52e.s3tc.ctex"]
 
 [params]
 
 compress/mode=2
+compress/high_quality=false
 compress/lossy_quality=0.7
 compress/hdr_compression=1
-compress/bptc_ldr=0
 compress/normal_map=0
 compress/channel_pack=0
 mipmaps/generate=true

interior/floors/interior_floor.gd

@@ -0,0 +1,49 @@
+class_name InteriorFloor extends Resource
+
+@export
+var corner_north_east_mesh: Mesh = null
+
+@export
+var corner_north_west_mesh: Mesh = null
+
+@export
+var corner_south_east_mesh: Mesh = null
+
+@export
+var corner_south_west_mesh: Mesh = null
+
+@export
+var edge_east_mesh: Mesh = null
+
+@export
+var edge_north_mesh: Mesh = null
+
+@export
+var edge_south_mesh: Mesh = null
+
+@export
+var edge_west_mesh: Mesh = null
+
+@export
+var endcap_east_mesh: Mesh = null
+
+@export
+var endcap_north_mesh: Mesh = null
+
+@export
+var endcap_south_mesh: Mesh = null
+
+@export
+var endcap_west_mesh: Mesh = null
+
+@export
+var fill_mesh: Mesh = null
+
+@export
+var island_mesh: Mesh = null
+
+@export
+var path_horizontal_mesh: Mesh = null
+
+@export
+var path_vertical_mesh: Mesh = null

interior/floors/wood_platforms/tiles.glb.import

@@ -0,0 +1,145 @@
+[remap]
+
+importer="scene"
+importer_version=1
+type="PackedScene"
+uid="uid://diwceah8n7mya"
+path="res://.godot/imported/tiles.glb-06c35114c4978742b880d24bfe15f3d9.scn"
+
+[deps]
+
+source_file="res://interior/floors/wood_platforms/tiles.glb"
+dest_files=["res://.godot/imported/tiles.glb-06c35114c4978742b880d24bfe15f3d9.scn"]
+
+[params]
+
+nodes/root_type="Node3D"
+nodes/root_name="Scene Root"
+nodes/apply_root_scale=true
+nodes/root_scale=1.0
+meshes/ensure_tangents=true
+meshes/generate_lods=true
+meshes/create_shadow_meshes=true
+meshes/light_baking=1
+meshes/lightmap_texel_size=0.2
+skins/use_named_skins=true
+animation/import=true
+animation/fps=30
+animation/trimming=false
+animation/remove_immutable_tracks=true
+import_script/path=""
+_subresources={
+"meshes": {
+"tiles_corner_north_east": {
+"generate/lightmap_uv": 0,
+"generate/lods": 0,
+"generate/shadow_meshes": 0,
+"lods/normal_merge_angle": 60.0,
+"lods/normal_split_angle": 25.0,
+"save_to_file/enabled": true,
+"save_to_file/make_streamable": "",
+"save_to_file/path": "res://interior/floors/wood_platforms/tiles_corner_north_east.res"
+},
+"tiles_corner_north_west": {
+"generate/lightmap_uv": 0,
+"generate/lods": 0,
+"generate/shadow_meshes": 0,
+"lods/normal_merge_angle": 60.0,
+"lods/normal_split_angle": 25.0,
+"save_to_file/enabled": true,
+"save_to_file/make_streamable": "",
+"save_to_file/path": "res://interior/floors/wood_platforms/tiles_corner_north_west.res"
+},
+"tiles_corner_south_east": {
+"generate/lightmap_uv": 0,
+"generate/lods": 0,
+"generate/shadow_meshes": 0,
+"lods/normal_merge_angle": 60.0,
+"lods/normal_split_angle": 25.0,
+"save_to_file/enabled": true,
+"save_to_file/make_streamable": "",
+"save_to_file/path": "res://interior/floors/wood_platforms/tiles_corner_south_east.res"
+},
+"tiles_corner_south_west": {
+"generate/lightmap_uv": 0,
+"generate/lods": 0,
+"generate/shadow_meshes": 0,
+"lods/normal_merge_angle": 60.0,
+"lods/normal_split_angle": 25.0,
+"save_to_file/enabled": true,
+"save_to_file/make_streamable": "",
+"save_to_file/path": "res://interior/floors/wood_platforms/tiles_corner_south_west.res"
+},
+"tiles_endcap_east&edge_east": {
+"generate/lightmap_uv": 0,
+"generate/lods": 0,
+"generate/shadow_meshes": 0,
+"lods/normal_merge_angle": 60.0,
+"lods/normal_split_angle": 25.0,
+"save_to_file/enabled": true,
+"save_to_file/make_streamable": "",
+"save_to_file/path": "res://interior/floors/wood_platforms/tiles_endcap_east&edge_east.res"
+},
+"tiles_endcap_north&edge_north": {
+"generate/lightmap_uv": 0,
+"generate/lods": 0,
+"generate/shadow_meshes": 0,
+"lods/normal_merge_angle": 60.0,
+"lods/normal_split_angle": 25.0,
+"save_to_file/enabled": true,
+"save_to_file/make_streamable": "",
+"save_to_file/path": "res://interior/floors/wood_platforms/tiles_endcap_north&edge_north.res"
+},
+"tiles_endcap_south&edge_south": {
+"generate/lightmap_uv": 0,
+"generate/lods": 0,
+"generate/shadow_meshes": 0,
+"lods/normal_merge_angle": 60.0,
+"lods/normal_split_angle": 25.0,
+"save_to_file/enabled": true,
+"save_to_file/make_streamable": "",
+"save_to_file/path": "res://interior/floors/wood_platforms/tiles_endcap_south&edge_south.res"
+},
+"tiles_endcap_west&edge_west": {
+"generate/lightmap_uv": 0,
+"generate/lods": 0,
+"generate/shadow_meshes": 0,
+"lods/normal_merge_angle": 60.0,
+"lods/normal_split_angle": 25.0,
+"save_to_file/enabled": true,
+"save_to_file/make_streamable": "",
+"save_to_file/path": "res://interior/floors/wood_platforms/tiles_endcap_west&edge_west.res"
+},
+"tiles_fill&path_horizontal": {
+"generate/lightmap_uv": 0,
+"generate/lods": 0,
+"generate/shadow_meshes": 0,
+"lods/normal_merge_angle": 60.0,
+"lods/normal_split_angle": 25.0,
+"save_to_file/enabled": true,
+"save_to_file/make_streamable": "",
+"save_to_file/path": "res://interior/floors/wood_platforms/tiles_fill&path_horizontal.res"
+},
+"tiles_island": {
+"generate/lightmap_uv": 0,
+"generate/lods": 0,
+"generate/shadow_meshes": 0,
+"lods/normal_merge_angle": 60.0,
+"lods/normal_split_angle": 25.0,
+"save_to_file/enabled": true,
+"save_to_file/make_streamable": "",
+"save_to_file/path": "res://interior/floors/wood_platforms/tiles_island.res"
+},
+"tiles_path_vertical": {
+"generate/lightmap_uv": 0,
+"generate/lods": 0,
+"generate/shadow_meshes": 0,
+"lods/normal_merge_angle": 60.0,
+"lods/normal_split_angle": 25.0,
+"save_to_file/enabled": true,
+"save_to_file/make_streamable": "",
+"save_to_file/path": "res://interior/floors/wood_platforms/tiles_path_vertical.res"
+}
+}
+}
+gltf/embedded_image_handling=1

interior/interior_map.gd

@@ -2,173 +2,200 @@ class_name InteriorMap extends Node3D
 
 const _CHUNK_SIZE := 32
 
+const _HALF_PI := PI / 2
+
 const _GRID_ORIGIN := Vector2(0.5, 0.5)
 
 ##
-## Cardinal orientation referencing the direction of a tile.
 ##
+##
+enum FloorTile {
+	ISLAND,
+	ENDCAP_WEST,
+	ENDCAP_NORTH,
+	CORNER_NORTH_WEST,
+	ENDCAP_EAST,
+	PATH_HORIZONTAL,
+	CORNER_NORTH_EAST,
+	EDGE_NORTH,
+	ENDCAP_SOUTH,
+	CORNER_SOUTH_WEST,
+	PATH_VERTICAL,
+	EDGE_WEST,
+	CORNER_SOUTH_EAST,
+	EDGE_SOUTH,
+	EDGE_EAST,
+	FILL,
+}
+
 enum Orientation {
-	NORTH,
-	EAST,
-	SOUTH,
-	WEST,
+	EAST = 2 ** 0,
+	SOUTH = 2 ** 1,
+	WEST = 2 ** 2,
+	NORTH = 2 ** 3,
 }
 
 ##
 ## Baked block of meshes making up a segment of the grid.
 ##
 class Chunk:
-	var _floor_meshes: Array[Mesh] = []
+	var _coordinates := Vector2i.ZERO
 
-	var _floor_orientation := PackedInt32Array()
+	var _interior_map: InteriorMap = null
 
-	var _multi_mesh_instances: Array[MultiMeshInstance] = []
+	var _renderables_by_mesh := {}
 
-	var _wall_meshes: Array[Mesh] = []
-
-	var _wall_orientation := PackedInt32Array()
-
-	func _init() -> void:
-		var buffer_size := _CHUNK_SIZE * _CHUNK_SIZE
-
-		_floor_meshes.resize(buffer_size)
-		_floor_orientation.resize(buffer_size)
-		_wall_meshes.resize(buffer_size)
-		_wall_orientation.resize(buffer_size)
+	func _init(interior_map: InteriorMap, coordinates: Vector2i) -> void:
+		_interior_map = interior_map
+		_coordinates = coordinates
 
 	##
 	## Invalidates the mesh block, re-baking its contents from the current mesh data set.
 	##
-	func invalidate(interior_map: InteriorMap, coordinate: Vector2i) -> void:
-		# TODO: Once this is all lowered into native code, look for ways to parallelize the loops.
-		for multi_mesh_instance in _multi_mesh_instances:
-			RenderingServer.free_rid(multi_mesh_instance._instance_rid)
-			RenderingServer.free_rid(multi_mesh_instance._multimesh_rid)
+	func invalidate() -> void:
+		_renderables_by_mesh.clear()
 
-		_multi_mesh_instances.clear()
+		var floor_map := _interior_map._floor_map
+		var map_size := _interior_map.size
+		var offset := _coordinates * _CHUNK_SIZE
+		var positions_by_mesh := {}
+		var map_area := Rect2i(Vector2.ZERO, map_size)
 
-		# Normalize mesh instance data for the chunk.
-		var transforms_by_mesh := {}
-		var grid_size := interior_map.size
-		var half_pi := PI / 2
+		for y in _CHUNK_SIZE:
+			var map_row_offset := (map_size.y * y)
 
-		for i in _floor_meshes.size():
-			var mesh := _floor_meshes[i]
+			for x in _CHUNK_SIZE:
+				var map_coordinates := offset + Vector2i(x, y)
+
+				if map_area.has_point(map_coordinates):
+					var interior_floor := floor_map[map_row_offset + map_coordinates.x]
+
+					if interior_floor != null:
+						var tile := 0
+
+						for i in Orientation.values().size():
+							var map_neighbor := map_coordinates + Vector2i(
+								roundi(cos(i * PI / 2.0)), roundi(sin(i * PI / 2.0)))
+
+							if map_area.has_point(map_neighbor):
+								tile += int(floor_map[(map_size.y * map_neighbor.y) + map_neighbor.x] == interior_floor) * 2 ** i
+
+						var mesh: Mesh = null
+
+						match tile:
+							FloorTile.ISLAND: mesh = interior_floor.island_mesh
+							FloorTile.ENDCAP_WEST: mesh = interior_floor.endcap_west_mesh
+							FloorTile.ENDCAP_NORTH: mesh = interior_floor.endcap_north_mesh
+							FloorTile.CORNER_NORTH_WEST: mesh = interior_floor.corner_north_west_mesh
+							FloorTile.ENDCAP_EAST: mesh = interior_floor.endcap_east_mesh
+							FloorTile.PATH_HORIZONTAL: mesh = interior_floor.path_horizontal_mesh
+							FloorTile.CORNER_NORTH_EAST: mesh = interior_floor.corner_north_east_mesh
+							FloorTile.EDGE_NORTH: mesh = interior_floor.edge_north_mesh
+							FloorTile.ENDCAP_SOUTH: mesh = interior_floor.endcap_south_mesh
+							FloorTile.CORNER_SOUTH_WEST: mesh = interior_floor.corner_south_west_mesh
+							FloorTile.PATH_VERTICAL: mesh = interior_floor.path_vertical_mesh
+							FloorTile.EDGE_WEST: mesh = interior_floor.edge_west_mesh
+							FloorTile.CORNER_SOUTH_EAST: mesh = interior_floor.corner_south_east_mesh
+							FloorTile.EDGE_SOUTH: mesh = interior_floor.edge_south_mesh
+							FloorTile.EDGE_EAST: mesh = interior_floor.edge_east_mesh
+							FloorTile.FILL: mesh = interior_floor.fill_mesh
 
 						if mesh != null:
-				if not(mesh in transforms_by_mesh):
-					transforms_by_mesh[mesh] = []
+							if not(mesh in positions_by_mesh):
+								positions_by_mesh[mesh] = PackedVector2Array()
 
-				transforms_by_mesh[mesh].append(Transform3D(
-					Basis.IDENTITY.rotated(Vector3.UP, half_pi * _floor_orientation[i]), Vector3(
-						(float(coordinate.x * _CHUNK_SIZE) + (i % _CHUNK_SIZE)) -
-							(float(grid_size.x) * _GRID_ORIGIN.x) + 0.5, 0.0,
-								(float(coordinate.y * _CHUNK_SIZE) + (i / _CHUNK_SIZE)) - 
-									(float(grid_size.y) * _GRID_ORIGIN.y) + 0.5)))
+							positions_by_mesh[mesh].append(Vector2(x, y))
 
-		for i in _wall_meshes.size():
-			var mesh := _wall_meshes[i]
+		# (Re)-bake tiles into multimesh instances for the chunk.
+		var scenario_rid := _interior_map.get_world_3d().scenario
 
-			if mesh != null:
-				if not(mesh in transforms_by_mesh):
-					transforms_by_mesh[mesh] = []
+		for mesh in positions_by_mesh:
+			var positions: PackedVector2Array = positions_by_mesh[mesh]
 
-				transforms_by_mesh[mesh].append(Transform3D(
-					Basis.IDENTITY.rotated(Vector3.UP, half_pi * _wall_orientation[i]), Vector3(
-						(float(coordinate.x * _CHUNK_SIZE) + (i % _CHUNK_SIZE)) -
-							(float(grid_size.x) * _GRID_ORIGIN.x) + 0.5, 0.0,
-								(float(coordinate.y * _CHUNK_SIZE) + (i / _CHUNK_SIZE)) - 
-									(float(grid_size.y) * _GRID_ORIGIN.y) + 0.5)))
+			if not(positions.is_empty()):
+				var position_count := positions.size()
+				var renderable := Renderable.new(scenario_rid, mesh.get_rid(), position_count)
 
-		# (Re)-bake into multimesh instances for the chunk.
-		var scenario_rid := interior_map.get_world_3d().scenario
-		var global_transform := interior_map.global_transform
+				for i in position_count:
+					var position := positions[i]
 
-		for chunk_mesh in transforms_by_mesh:
-			var multi_mesh_instance := MultiMeshInstance.new(
-				scenario_rid, chunk_mesh.get_rid(), transforms_by_mesh[chunk_mesh])
+					renderable.set_instance_transform(i, Transform3D(Basis.IDENTITY, Vector3(
+						((float(offset.x) + position.x) - (float(map_size.x) * _GRID_ORIGIN.x)) + 0.5,
+							0.0,
+								((float(offset.y) + position.y) - (float(map_size.y) * _GRID_ORIGIN.y)) + 0.5)))
 
-			multi_mesh_instance.set_offset(global_transform)
-			_multi_mesh_instances.append(multi_mesh_instance)
+				_renderables_by_mesh[mesh] = renderable
+
+	func set_transform(transform: Transform3D) -> void:
+		for mesh in _renderables_by_mesh:
+			_renderables_by_mesh[mesh].set_transform(transform)
+
+	func set_visible(visible: bool) -> void:
+		for mesh in _renderables_by_mesh:
+			_renderables_by_mesh[mesh].set_visible(visible)
 
 ##
-	## Sets the floor mesh in the chunk at the location relative [code]coordinatess[/code] to
-	## [code]mesh[/code].
 ##
-	## *Note* that [method Chunk.invalidate] must be called at some point after to visually update
-	## the chunk.
 ##
-	func set_floor_mesh(coordinates: Vector2i, orientation: Orientation, mesh: Mesh) -> void:
-		var index := (_CHUNK_SIZE * coordinates.y) + coordinates.x
-
-		_floor_orientation[index] = orientation
-		_floor_meshes[index] = mesh
-
-	##
-	## Sets the wall mesh in the chunk at the location relative [code]coordinatess[/code] to
-	## [code]mesh[/code].
-	##
-	## *Note* that [method Chunk.invalidate] must be called at some point after to visually update
-	## the chunk.
-	##
-	func set_wall_mesh(coordinates: Vector2i, orientation: Orientation, mesh: Mesh) -> void:
-		var index := (_CHUNK_SIZE * coordinates.y) + coordinates.x
-
-		_wall_orientation[index] = orientation
-		_wall_meshes[index] = mesh
-
-##
-## Specialized multi-mesh instance convenience for use within the tile grid and its chunks.
-##
-class MultiMeshInstance:
+class Renderable:
 	var _instance_rid := RID()
 
 	var _multimesh_rid := RID()
 
-	func _init(scenario_rid: RID, mesh_rid: RID, transforms: Array) -> void:
+	func _init(scenario_rid: RID, mesh_rid: RID, transform_count: int) -> void:
 		_multimesh_rid = RenderingServer.multimesh_create()
 		_instance_rid = RenderingServer.instance_create2(_multimesh_rid, scenario_rid)
 
 		RenderingServer.multimesh_set_mesh(_multimesh_rid, mesh_rid)
 
-		var transform_count := transforms.size()
-
 		RenderingServer.multimesh_allocate_data(_multimesh_rid,
 			transform_count, RenderingServer.MULTIMESH_TRANSFORM_3D, true)
 
-		for i in transform_count:
-			RenderingServer.multimesh_instance_set_transform(_multimesh_rid, i, transforms[i])
+	func _notification(what: int) -> void:
+		match what:
+			NOTIFICATION_PREDELETE:
+				RenderingServer.free_rid(_instance_rid)
+				RenderingServer.free_rid(_multimesh_rid)
 
 	##
-	## Sets the transform of the instance to [code]offset[/code].
 	##
-	func set_offset(offset: Transform3D) -> void:
-		RenderingServer.instance_set_transform(_instance_rid, offset)
+	##
+	func set_instance_transform(instance_index: int, transform: Transform3D) -> void:
+		RenderingServer.multimesh_instance_set_transform(_multimesh_rid, instance_index, transform)
 
 	##
-	## Sets the visibility of the instance to [code]is_visible[/code].
 	##
-	func set_visible(is_visible: bool) -> void:
-		RenderingServer.instance_set_visible(_instance_rid, is_visible)
+	##
+	func set_visible(visible: bool) -> void:
+		RenderingServer.instance_set_visible(_instance_rid, visible)
+
+	##
+	##
+	##
+	func set_transform(transform: Transform3D) -> void:
+		RenderingServer.instance_set_transform(_instance_rid, transform)
 
 var _chunks: Array[Chunk] = []
 
 var _chunks_size := Vector2i.ZERO
 
+var _floor_map: Array[InteriorFloor] = []
+
 ##
 ## Size of the tile grid (in engine units).
 ##
 @export
 var size: Vector2i:
 	set(value):
-		var chunk_size_factor := float(_CHUNK_SIZE)
-
-		_chunks.resize(int(ceilf(value.x / chunk_size_factor) * ceilf(value.y / chunk_size_factor)))
-
-		for i in _chunks.size():
-			_chunks[i] = Chunk.new()
-
 		_chunks_size = Vector2i((value / float(_CHUNK_SIZE)).ceil())
+
+		_floor_map.resize(value.x * value.y)
+		_chunks.resize(_chunks_size.x * _chunks_size.y)
+
+		for y in _chunks_size.y:
+			for x in _chunks_size.x:
+				_chunks[(y * _CHUNK_SIZE) + x] = Chunk.new(self, Vector2i(x, y))
+
 		size = value
 
 func _get_chunk(chunk_coordinate: Vector2i) -> Chunk:
@@ -178,13 +205,11 @@ func _notification(what: int) -> void:
 	match what:
 		NOTIFICATION_TRANSFORM_CHANGED:
 			for chunk in _chunks:
-				for multi_mesh_instance in chunk._multi_mesh_instances:
-					multi_mesh_instance.set_offset_transform(global_transform)
+				chunk.set_transform(global_transform)
 
 		NOTIFICATION_VISIBILITY_CHANGED:
 			for chunk in _chunks:
-				for multi_mesh_instance in chunk._multi_mesh_instances:
-					multi_mesh_instance.set_visible(visible)
+				chunk.set_visible(visible)
 
 ##
 ## Clears the entirety of the tile grid to only contain tiles of instance [code]tile[/code] pointing
@@ -192,46 +217,17 @@ func _notification(what: int) -> void:
 ##
 ## For clearing a specific region of the mesh grid, see [method fill_mesh].
 ##
-func clear_tiles(orientation: Orientation, tile: InteriorTile) -> void:
-	if tile == null:
-		for y in size.y:
-			for x in size.x:
-				var coordinates := Vector2i(x, y)
-				var chunk := _get_chunk(coordinates / _CHUNK_SIZE)
-				var chunk_coordinates := coordinates % _CHUNK_SIZE
-
-				chunk.set_floor_mesh(chunk_coordinates, orientation, null)
-				chunk.set_wall_mesh(chunk_coordinates, orientation, null)
-
-	else:
-		var mesh := tile.mesh
-
-		match tile.kind:
-			InteriorTile.Kind.FLOOR:
-				for y in size.y:
-					for x in size.x:
-						var coordinate := Vector2i(x, y)
-
-						_get_chunk(coordinate / _CHUNK_SIZE).\
-							set_floor_mesh(coordinate % _CHUNK_SIZE, orientation, mesh)
-
-			InteriorTile.Kind.WALL:
-				for y in size.y:
-					for x in size.x:
-						var coordinate := Vector2i(x, y)
-
-						_get_chunk(coordinate / _CHUNK_SIZE).\
-							set_floor_mesh(coordinate % _CHUNK_SIZE, orientation, mesh)
+func clear() -> void:
+	for i in _floor_map.size():
+		_floor_map[i] = null
 
 	for y in _chunks_size.y:
 		for x in _chunks_size.x:
-			var chunk_coordinate := Vector2i(x, y)
-
-			_get_chunk(chunk_coordinate).invalidate(self, chunk_coordinate)
+			_get_chunk(Vector2i(x, y)).invalidate()
 
 ##
 ## Clears the region of the tile grid at [code]area[/code] to only contain instances of
-## [code]tile[/code] pointing in the orientation of [code]orientation[/code].
+## [code]interior_floor[/code].
 ##
 ## *Note* that [code]area[/code] *must* be within the area of the of the mesh grid, where
 ## [code]Vector2i.ZERO[/code] is the top-left and [member size] [code]- 1[/code] is the bottom-
@@ -239,70 +235,25 @@ func clear_tiles(orientation: Orientation, tile: InteriorTile) -> void:
 ##
 ## For clearing the whole of the mesh grid, see [method clear_mesh].
 ##
-func fill_tiles(area: Rect2i, orientation: Orientation, tile: InteriorTile) -> void:
-	assert(get_area().encloses(area), "area must be within grid")
+func fill_floor(area: Rect2i, interior_floor: InteriorFloor) -> void:
+	assert(Rect2i(Vector2i.ZERO, size).encloses(area), "area must be within grid")
 
 	var filled_chunks := BitMap.new()
 
 	filled_chunks.resize(_chunks_size)
 
-	if tile == null:
 	for y in range(area.position.y, area.end.y):
 		for x in range(area.position.x, area.end.x):
-				var coordinates := Vector2i(x, y)
-				var chunk_coordinates := coordinates / _CHUNK_SIZE
-				var chunk := _get_chunk(coordinates / _CHUNK_SIZE)
-				var local_coordinates := coordinates % _CHUNK_SIZE
-
-				chunk.set_floor_mesh(local_coordinates, orientation, null)
-				chunk.set_wall_mesh(local_coordinates, orientation, null)
-				filled_chunks.set_bitv(chunk_coordinates, true)
-
-	else:
-		var mesh := tile.mesh
-
-		if tile.fixed_orientation:
-			orientation = Orientation.NORTH
-
-		match tile.kind:
-			InteriorTile.Kind.FLOOR:
-				for y in range(area.position.y, area.end.y):
-					for x in range(area.position.x, area.end.x):
-						var coordinate := Vector2i(x, y)
-						var chunk_coordinate := coordinate / _CHUNK_SIZE
-
-						_get_chunk(chunk_coordinate).set_floor_mesh(
-							coordinate % _CHUNK_SIZE, orientation, mesh)
-
-						filled_chunks.set_bitv(chunk_coordinate, true)
-
-			InteriorTile.Kind.WALL:
-				for y in range(area.position.y, area.end.y):
-					for x in range(area.position.x, area.end.x):
-						var coordinate := Vector2i(x, y)
-						var chunk_coordinate := coordinate / _CHUNK_SIZE
-
-						_get_chunk(chunk_coordinate).set_wall_mesh(
-							coordinate % _CHUNK_SIZE, orientation, mesh)
-
-						filled_chunks.set_bitv(chunk_coordinate, true)
+			_floor_map[(size.y * (y / _CHUNK_SIZE)) + (x / _CHUNK_SIZE)] = interior_floor
 
 	for y in _chunks_size.y:
 		for x in _chunks_size.x:
 			if filled_chunks.get_bit(x, y):
-				var chunk_coordinate := Vector2i(x, y)
-
-				_get_chunk(chunk_coordinate).invalidate(self, chunk_coordinate)
+				_get_chunk(Vector2i(x, y)).invalidate()
 
 ##
-## Returns the area of the interior map based on its current size.
-##
-func get_area() -> Rect2i:
-	return Rect2i(Vector2i.ZERO, size)
-
-##
-## Plots a single tile at [code]coordinates[/code] to be an instance of [code]tile[/code] pointing
-## in the orientation of [code]orientation[/code], overwriting whatever it previously contained.
+## Plots a single tile at [code]coordinates[/code] to be an instance of [code]interior_floor[/code],
+## overwriting whatever it previously contained.
 ##
 ## *Note* that [code]coordinates[/code] *must* be within the area of the of the mesh grid, where
 ## [code]Vector2i.ZERO[/code] is the top-left and [member size] [code]- 1[/code] is the bottom-
@@ -310,30 +261,9 @@ func get_area() -> Rect2i:
 ##
 ## For bulk-setting many meshes at once, see [method fill_mesh] and [method clear_mesh].
 ##
-func plot_tile(coordinates: Vector2i, orientation: Orientation, tile: InteriorTile) -> void:
-	assert(get_area().has_point(coordinates), "coordinate must be within grid")
+func plot_floor(coordinates: Vector2i, interior_floor: InteriorFloor) -> void:
+	assert(Rect2i(Vector2i.ZERO, size).has_point(coordinates), "coordinate must be within grid")
 
-	var chunk_coordinates := coordinates / _CHUNK_SIZE
-	var chunk := _get_chunk(chunk_coordinates)
+	_floor_map[(size.y * coordinates.y) + coordinates.x] = interior_floor
 
-	if tile == null:
-		var local_coordinates := coordinates % _CHUNK_SIZE
-
-		chunk.set_floor_mesh(local_coordinates, orientation, null)
-		chunk.set_wall_mesh(local_coordinates, orientation, null)
-		chunk.invalidate(self, chunk_coordinates)
-
-	else:
-		var mesh := tile.mesh
-
-		if tile.fixed_orientation:
-			orientation = Orientation.NORTH
-
-		match tile.kind:
-			InteriorTile.Kind.FLOOR:
-				chunk.set_floor_mesh(coordinates % _CHUNK_SIZE, orientation, mesh)
-				chunk.invalidate(self, chunk_coordinates)
-
-			InteriorTile.Kind.WALL:
-				chunk.set_wall_mesh(coordinates % _CHUNK_SIZE, orientation, mesh)
-				chunk.invalidate(self, chunk_coordinates)
+	_get_chunk(coordinates / _CHUNK_SIZE).invalidate()

interior/interior_tile.gd

@@ -1,29 +0,0 @@
-class_name InteriorTile extends Resource
-
-##
-## Identifier for the kind of interior tile.
-##
-enum Kind {
-	FLOOR,
-	WALL,
-}
-
-##
-## Flag for determining if the tile is affected by orientations specified in an [InteriorMap].
-##
-@export
-var fixed_orientation := false
-
-##
-## See [enum Kind].
-##
-## Interior tiles of different kinds will not conflict when placing them.
-##
-@export
-var kind := Kind.FLOOR
-
-##
-## Used to visualize the interior tile.
-##
-@export
-var mesh: Mesh = null

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interior/tiles/limestone_dungeon/hole_orm.png.import

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