robustness of tileset related functionality

.import/brickwall.png-809cb096e36d6f38bdd0dc9250b08205.md5

@@ -0,0 +1,3 @@
+source_md5="88802550c0ee17f57dfd0bd814e77811"
+dest_md5="64a5bb7ee98d59912ece658665687037"
+

art/tiles/brickwall.png.import

@@ -0,0 +1,35 @@
+[remap]
+
+importer="texture"
+type="StreamTexture"
+path="res://.import/brickwall.png-809cb096e36d6f38bdd0dc9250b08205.stex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://art/tiles/brickwall.png"
+dest_files=[ "res://.import/brickwall.png-809cb096e36d6f38bdd0dc9250b08205.stex" ]
+
+[params]
+
+compress/mode=0
+compress/lossy_quality=0.7
+compress/hdr_mode=0
+compress/bptc_ldr=0
+compress/normal_map=0
+flags/repeat=0
+flags/filter=false
+flags/mipmaps=false
+flags/anisotropic=false
+flags/srgb=2
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/HDR_as_SRGB=false
+process/invert_color=false
+process/normal_map_invert_y=false
+stream=false
+size_limit=0
+detect_3d=true
+svg/scale=1.0

nodes/4WayController.gd

@@ -0,0 +1,22 @@
+extends TK_Controller
+class_name TK_4WayController
+
+## Composable 4-way grid controller.
+## Depends on placement below some Node2D below some GridContext.
+
+# todo: Network player aware.
+# todo: AI aware.
+
+var _game_object: Node2D
+
+func _enter_tree() -> void:
+    _game_object = get_parent()
+
+func _input(p_event: InputEvent):
+    var direction := InputUtils.input_event_to_4way_direction(p_event)
+    if direction == Vector2.ZERO:
+        return
+
+    var cell = _context.local_position_to_context_position(_game_object.position)
+    var new_cell = cell + direction
+    _context.try_moving(_game_object, cell, new_cell)

nodes/4WayController.tscn

@@ -1,6 +1,6 @@
 [gd_scene load_steps=2 format=2]
 
-[ext_resource path="res://nodes/GridController.gd" type="Script" id=1]
+[ext_resource path="res://nodes/4WayController.gd" type="Script" id=1]
 
 [node name="GridController" type="Node"]
 script = ExtResource( 1 )

nodes/Context.gd

@@ -0,0 +1,18 @@
+tool
+extends Node2D
+class_name TK_Context
+
+# todo: Abstract actions.
+# todo: Signal registration of GameObject actions.
+
+func local_position_to_context_position(_p_position: Vector2) -> Vector2:
+    push_error("Abstract class method is unimplemented")
+    return Vector2.ZERO
+
+func is_path_traversible(_p_game_object: Node2D, _p_from: Vector2, _p_to: Vector2) -> bool:
+    push_error("Abstract class method is unimplemented")
+    return false
+
+func try_moving(_p_game_object: Node2D, _p_from: Vector2, _p_to: Vector2) -> bool:
+    push_error("Abstract class method is unimplemented")
+    return false

nodes/Controller.gd

@@ -0,0 +1,13 @@
+extends Node
+class_name TK_Controller
+
+var _context: Node2D
+
+func _enter_tree() -> void:
+    _context = _get_context()
+
+func _get_context() -> Node:
+    var current := self.get_parent().get_parent()
+    while not current is TK_Context:
+        current = current.get_parent()
+    return current

nodes/FittingSprite.gd

@@ -4,7 +4,17 @@ class_name TK_FittingSprite
 
 ## A Sprite that is resized to absolute pixel size, no matter the texture.
 
-export var target_size: Vector2 setget _set_target_size
+const NO_SIZE_SENTINEL = Vector2(-1, -1)
+
+export var target_size: Vector2 = NO_SIZE_SENTINEL setget _set_target_size
+
+# todo: Ask context about preferred sizing if there's any.
+func _enter_tree() -> void:
+    # It's okay to fail here for non-grid contexts.
+    if get_parent().get_parent().connect("cell_size_changed", self, "_update_cell_size"):
+        _set_target_size(get_parent().get_parent().cell_size)
+    elif target_size == NO_SIZE_SENTINEL:
+        _set_target_size(texture.get_size())
 
 func _set_target_size(p_size: Vector2) -> void:
     target_size = p_size
@@ -12,3 +22,6 @@ func _set_target_size(p_size: Vector2) -> void:
 
 func _update_scale() -> void:
     scale = target_size / texture.get_size()
+
+func _update_cell_size(_p_old_cell_size: Vector2, p_new_cell_size: Vector2) -> void:
+    _set_target_size(p_new_cell_size)

nodes/GameObject.gd

@@ -0,0 +1,12 @@
+tool
+extends Node2D
+class_name TK_GameObject
+
+func _ready() -> void:
+    # It's okay to fail here for non-grid contexts.
+    if get_parent().connect("cell_size_changed", self, "_update_cell_size"):
+        pass
+
+func _update_cell_size(p_old_cell_size: Vector2, p_new_cell_size: Vector2) -> void:
+    var delta := p_new_cell_size / p_old_cell_size
+    position *= delta

nodes/GameObject.tscn

@@ -0,0 +1,6 @@
+[gd_scene load_steps=2 format=2]
+
+[ext_resource path="res://nodes/GameObject.gd" type="Script" id=1]
+
+[node name="GameObject" type="Node2D"]
+script = ExtResource( 1 )

nodes/GridContext.gd

@@ -1,20 +1,48 @@
-extends Node2D
-class_name TK_GridContext
+tool
+extends TK_Context
+class_name n_parent
 
 ## todo: Cell visualization.
 ## todo: Integration of TileMap.
 
-export var cell_size: Vector2 = Vector2(64, 64)
+export var cell_size: Vector2 = Vector2(64, 64) setget _set_cell_size
 
-func position_to_cell_position(p_position: Vector2) -> Vector2:
+signal cell_size_changed(p_old_cell_size, p_new_cell_size)
+
+var _colliders: Dictionary # Node to null (set)
+
+func local_position_to_context_position(p_position: Vector2) -> Vector2:
     return p_position / cell_size
 
-func is_cell_traversible(p_cell_position: Vector2) -> bool:
+func is_path_traversible(p_game_object: Node2D, p_from: Vector2, p_to: Vector2) -> bool:
+    for collider in _colliders:
+        if not collider.is_path_traversible(p_game_object, p_from, p_to):
+            return false
     return true
 
-func try_moving(p_node: Node2D, p_cell_position: Vector2) -> bool:
-    if not is_cell_traversible(p_cell_position):
+# todo: Effectful traversal.
+func try_moving(p_game_object: Node2D, p_from: Vector2, p_to: Vector2) -> bool:
+    if not is_path_traversible(p_game_object, p_from, p_to):
         return false
 
-    p_node.position = cell_size * p_cell_position
+    p_game_object.position = cell_size * p_to
     return true
+
+func register_collider(p_collider: Node) -> void:
+    _colliders[p_collider] = null
+    if not p_collider.is_connected("child_exiting_tree", self, "_on_collider_exiting_tree") and \
+            p_collider.connect("child_exiting_tree", self, "_on_collider_exiting_tree") != OK:
+        assert(false)
+
+func _on_collider_exiting_tree(p_collider) -> void:
+    if not _colliders.erase(p_collider):
+        pass
+
+func _set_cell_size(p_new_cell_size: Vector2) -> void:
+    if p_new_cell_size.x == 0 or p_new_cell_size.y == 0:
+        push_error("Cell size cannot be zero")
+        return
+
+    var cell_size_cache = cell_size
+    cell_size = p_new_cell_size
+    emit_signal("cell_size_changed", cell_size_cache, p_new_cell_size)

nodes/GridController.gd

@@ -1,30 +0,0 @@
-extends Node
-class_name TK_GridController
-
-## Composable 4-way grid controller.
-## Depends on placement below some Node2D below some GridContext.
-
-# todo: Turn-based logic context.
-
-signal moved(p_new_cell_position)
-
-var _grid_context_cache: Node2D
-
-func _enter_tree() -> void:
-    _grid_context_cache = _get_grid_context()
-
-func _input(p_event: InputEvent):
-    var direction := InputUtils.input_event_to_4way_direction(p_event)
-    if direction == Vector2.ZERO:
-        return
-
-    var cell = _grid_context_cache.position_to_cell_position(get_parent().position)
-    var new_cell = cell + direction
-    if _grid_context_cache.try_moving(get_parent(), new_cell):
-        emit_signal("moved", new_cell)
-
-func _get_grid_context() -> Node:
-    var current := self.get_parent().get_parent()
-    while current.name != "GridContext":
-        current = current.get_parent()
-    return current

nodes/TileMapObject.gd

@@ -0,0 +1,83 @@
+tool
+extends TileMap
+
+# todo: Give care about descriptor swaps being loseless / non introducing artifacts.
+# todo: Prevent user from deleting or editing tile_set property.
+
+# todo: Update it when changed.
+## Dictates whether tileset collision information should be exposed to game context.
+export var expose_collisions: bool = true
+
+# todo: Use Node identity instead of name.
+var _descriptor_name_to_id: Dictionary # String to int
+var _id_to_descriptor_name: Dictionary # int to String
+
+func change_tile_texture(p_tile: String, p_texture: Texture) -> void:
+    if not p_tile in _descriptor_name_to_id:
+        push_error("Invalid tile name")
+        return
+    
+    var id := _descriptor_name_to_id[p_tile] as int
+    tile_set.tile_set_texture(id, p_texture)
+
+func is_path_traversible(p_game_object: Node2D, p_from: Vector2, p_to: Vector2) -> bool:
+    if p_from.distance_squared_to(p_to) == 1:
+        var id := get_cell(int(p_to.x), int(p_to.y))
+        if id == -1: return true
+        var descriptor = _id_to_descriptor_name[id] as String
+        return get_node(descriptor).is_traversible_for(p_game_object)
+    else:
+        print_debug("Unimplemented")
+        return false
+
+func _enter_tree() -> void:
+    tile_set = TileSet.new()
+
+    var n_parent := get_parent()
+    if not n_parent is TK_Context:
+        return
+
+    n_parent.register_collider(self)
+
+    # It's okay to fail here for non-grid contexts.
+    if not n_parent.is_connected("cell_size_changed", self, "_update_cell_size") and \
+            n_parent.connect("cell_size_changed", self, "_update_cell_size") != OK:
+        assert(false)
+
+    _update_cell_size(n_parent.cell_size, n_parent.cell_size)
+
+    if not is_connected("child_entered_tree", self, "_on_child_entered_tree") and \
+            connect("child_entered_tree", self, "_on_child_entered_tree") != OK:
+        assert(false)
+
+    if not is_connected("child_exiting_tree", self, "_on_child_exiting_tree") and \
+            connect("child_exiting_tree", self, "_on_child_exiting_tree") != OK:
+        assert(false)
+
+func _update_cell_size(_p_old_cell_size: Vector2, p_new_cell_size: Vector2) -> void:
+    # We're assuming that all tile textures are of same dimensions.
+    # todo: Diagnose mismatch by walking over all textures?
+    if tile_set.get_tiles_ids().size() == 0:
+        return
+    var tileset_texture_size := tile_set.tile_get_texture(0).get_size()
+    scale = p_new_cell_size / tileset_texture_size
+    cell_size = p_new_cell_size / scale
+
+func _on_child_entered_tree(p_node: Node) -> void:
+    var id := tile_set.get_last_unused_tile_id()
+    _descriptor_name_to_id[p_node.name] = id
+    _id_to_descriptor_name[id] = p_node.name
+    tile_set.create_tile(id)
+    tile_set.tile_set_texture(id, p_node.texture)
+    if not p_node.id.empty():
+        tile_set.tile_set_name(id, p_node.id)
+
+func _on_child_exiting_tree(p_node: Node) -> void:
+    var id := _descriptor_name_to_id[p_node.name] as int
+    for cell in get_used_cells_by_id(id):
+        set_cellv(cell, -1)
+    tile_set.remove_tile(id)
+    if not _descriptor_name_to_id.erase(p_node.name):
+        assert(false)
+    if not _id_to_descriptor_name.erase(id):
+        assert(false)

nodes/TileMapTileDescriptor.gd

@@ -0,0 +1,20 @@
+tool
+extends Node
+class_name TK_TileMapTileDescriptor
+
+export var texture: Texture setget _set_texture
+
+# todo: More layer customizeability.
+export var is_solid: bool
+
+# todo: Update TileMapObject in editor when it's changed.
+export var id: String = ""
+
+# todo: Should work for non-grid objects.
+func is_traversible_for(_p_game_object: Node2D) -> bool:
+    return not is_solid
+
+func _set_texture(p_texture: Texture) -> void:
+    texture = p_texture
+    if is_inside_tree():
+        get_parent().change_tile_texture(name, p_texture)

nodes/singletons/Arithmetic.gd

@@ -2,7 +2,7 @@ extends Node
 class_name TK_Arithmetic
 
 static func float_mod(p_a: float, p_b: float) -> float:
-    return p_a - (p_b * floor(p_a / p_b))
+    return p_a - p_b * floor(p_a / p_b)
 
 static func vector2_mod(p_a: Vector2, p_b: Vector2) -> Vector2:
-    return p_a - (p_b * (p_a / p_b).floor())
+    return p_a - p_b * (p_a / p_b).floor()

nodes/singletons/InputUtils.gd

@@ -1,6 +1,6 @@
 extends Node
 
-func input_event_to_4way_direction(p_event: InputEvent) -> Vector2:
+func input_event_to_8way_direction(p_event: InputEvent) -> Vector2:
     var result := Vector2.ZERO
     if p_event.is_action_pressed("move_down"):
         result.y += 1
@@ -11,3 +11,15 @@ func input_event_to_4way_direction(p_event: InputEvent) -> Vector2:
     if p_event.is_action_pressed("move_left"):
         result.x -= 1
     return result
+
+func input_event_to_4way_direction(p_event: InputEvent) -> Vector2:
+    if p_event.is_action_pressed("move_down") and not p_event.is_action_pressed("move_up"):
+        return Vector2.DOWN
+    elif p_event.is_action_pressed("move_up") and not p_event.is_action_pressed("move_down"):
+        return Vector2.UP
+    elif p_event.is_action_pressed("move_left") and not p_event.is_action_pressed("move_right"):
+        return Vector2.LEFT
+    elif p_event.is_action_pressed("move_right") and not p_event.is_action_pressed("move_left"):
+        return Vector2.RIGHT
+    else:
+        return Vector2.ZERO

project.godot

@@ -104,25 +104,45 @@ _global_script_classes=[ {
 "language": "GDScript",
 "path": "res://addons/Godoxel/Util.gd"
 }, {
+"base": "TK_Controller",
+"class": "TK_4WayController",
+"language": "GDScript",
+"path": "res://nodes/4WayController.gd"
+}, {
 "base": "Node",
 "class": "TK_Arithmetic",
 "language": "GDScript",
 "path": "res://nodes/singletons/Arithmetic.gd"
 }, {
+"base": "Node2D",
+"class": "TK_Context",
+"language": "GDScript",
+"path": "res://nodes/Context.gd"
+}, {
+"base": "Node",
+"class": "TK_Controller",
+"language": "GDScript",
+"path": "res://nodes/Controller.gd"
+}, {
 "base": "Sprite",
 "class": "TK_FittingSprite",
 "language": "GDScript",
 "path": "res://nodes/FittingSprite.gd"
 }, {
 "base": "Node2D",
-"class": "TK_GridContext",
+"class": "TK_GameObject",
 "language": "GDScript",
-"path": "res://nodes/GridContext.gd"
+"path": "res://nodes/GameObject.gd"
 }, {
 "base": "Node",
-"class": "TK_GridController",
+"class": "TK_TileMapTileDescriptor",
 "language": "GDScript",
-"path": "res://nodes/GridController.gd"
+"path": "res://nodes/TileMapTileDescriptor.gd"
+}, {
+"base": "TK_Context",
+"class": "n_parent",
+"language": "GDScript",
+"path": "res://nodes/GridContext.gd"
 } ]
 _global_script_class_icons={
 "BrushPrefabs": "",
@@ -144,16 +164,21 @@ _global_script_class_icons={
 "GERainbow": "",
 "GERect": "",
 "GEUtils": "",
+"TK_4WayController": "",
 "TK_Arithmetic": "",
+"TK_Context": "",
+"TK_Controller": "",
 "TK_FittingSprite": "",
-"TK_GridContext": "",
-"TK_GridController": ""
+"TK_GameObject": "",
+"TK_TileMapTileDescriptor": "",
+"n_parent": ""
 }
 
 [application]
 
 config/name="TochieKit"
 run/main_scene="res://scenes/Game.tscn"
+run/low_processor_mode=true
 config/icon="res://icon.png"
 
 [autoload]
@@ -161,6 +186,12 @@ config/icon="res://icon.png"
 Arithmetic="*res://nodes/singletons/Arithmetic.gd"
 InputUtils="*res://nodes/singletons/InputUtils.gd"
 
+[display]
+
+window/size/height=576
+window/stretch/mode="2d"
+window/stretch/aspect="keep"
+
 [editor_plugins]
 
 enabled=PoolStringArray( "res://addons/Godoxel/plugin.cfg" )
@@ -196,6 +227,15 @@ move_left={
  ]
 }
 
+[input_devices]
+
+buffering/agile_event_flushing=true
+pointing/emulate_touch_from_mouse=true
+
+[node]
+
+name_num_separator=3
+
 [physics]
 
 common/enable_pause_aware_picking=true
@@ -203,8 +243,18 @@ common/enable_pause_aware_picking=true
 [rendering]
 
 quality/driver/driver_name="GLES2"
+quality/intended_usage/framebuffer_allocation=1
+quality/intended_usage/framebuffer_allocation.mobile=1
 2d/snapping/use_gpu_pixel_snap=true
+threads/thread_model=2
 vram_compression/import_etc=true
 vram_compression/import_etc2=false
+quality/reflections/texture_array_reflections=false
+quality/shading/force_vertex_shading=true
+quality/shading/force_lambert_over_burley=true
+quality/shading/force_blinn_over_ggx=true
+quality/filters/use_nearest_mipmap_filter=true
+batching/options/single_rect_fallback=true
+quality/lightmapping/use_bicubic_sampling=false
 environment/default_clear_color=Color( 0.00784314, 0, 0.117647, 1 )
 environment/default_environment="res://default_env.tres"

scenes/Game.tscn

@@ -1,21 +1,59 @@
-[gd_scene load_steps=5 format=2]
+[gd_scene load_steps=10 format=2]
 
 [ext_resource path="res://nodes/FittingSprite.gd" type="Script" id=1]
 [ext_resource path="res://art/entities/fiend.png" type="Texture" id=2]
-[ext_resource path="res://nodes/GridController.gd" type="Script" id=3]
+[ext_resource path="res://nodes/4WayController.tscn" type="PackedScene" id=3]
 [ext_resource path="res://nodes/GridContext.tscn" type="PackedScene" id=4]
+[ext_resource path="res://nodes/GameObject.tscn" type="PackedScene" id=5]
+[ext_resource path="res://art/tiles/brickwall.png" type="Texture" id=6]
+[ext_resource path="res://nodes/TileMapObject.tscn" type="PackedScene" id=7]
+[ext_resource path="res://scenes/tiles/Brickwall.tscn" type="PackedScene" id=8]
 
-[node name="Game" type="Node"]
+[sub_resource type="TileSet" id=1]
+0/name = "tk.Brickwall"
+0/texture = ExtResource( 6 )
+0/tex_offset = Vector2( 0, 0 )
+0/modulate = Color( 1, 1, 1, 1 )
+0/region = Rect2( 0, 0, 0, 0 )
+0/tile_mode = 0
+0/occluder_offset = Vector2( 0, 0 )
+0/navigation_offset = Vector2( 0, 0 )
+0/shape_offset = Vector2( 0, 0 )
+0/shape_transform = Transform2D( 1, 0, 0, 1, 0, 0 )
+0/shape_one_way = false
+0/shape_one_way_margin = 0.0
+0/shapes = [  ]
+0/z_index = 0
+
+[node name="Gauntlet" type="Node"]
 
 [node name="GridContext" parent="." instance=ExtResource( 4 )]
 
-[node name="Fiend" type="Sprite" parent="GridContext"]
-position = Vector2( 128, 128 )
+[node name="TileMapObject" parent="GridContext" instance=ExtResource( 7 )]
+scale = Vector2( 4, 4 )
+tile_set = SubResource( 1 )
+cell_size = Vector2( 16, 16 )
+tile_data = PoolIntArray( 0, 0, 0, 1, 0, 0, 2, 0, 0, 3, 0, 0, 4, 0, 0, 5, 0, 0, 6, 0, 0, 7, 0, 0, 8, 0, 0, 9, 0, 0, 10, 0, 0, 11, 0, 0, 12, 0, 0, 13, 0, 0, 14, 0, 0, 15, 0, 0, 65536, 0, 0, 65551, 0, 0, 131072, 0, 0, 131087, 0, 0, 196608, 0, 0, 196623, 0, 0, 262144, 0, 0, 262159, 0, 0, 327680, 0, 0, 327695, 0, 0, 393216, 0, 0, 393231, 0, 0, 458752, 0, 0, 458767, 0, 0, 524288, 0, 0, 524289, 0, 0, 524290, 0, 0, 524291, 0, 0, 524292, 0, 0, 524293, 0, 0, 524294, 0, 0, 524295, 0, 0, 524296, 0, 0, 524297, 0, 0, 524298, 0, 0, 524299, 0, 0, 524300, 0, 0, 524301, 0, 0, 524302, 0, 0, 524303, 0, 0 )
+
+[node name="Brickwall" parent="GridContext/TileMapObject" instance=ExtResource( 8 )]
+
+[node name="Player" parent="GridContext" instance=ExtResource( 5 )]
+position = Vector2( 384, 128 )
+
+[node name="Visual" type="Sprite" parent="GridContext/Player"]
 scale = Vector2( 4, 4 )
 texture = ExtResource( 2 )
 centered = false
 script = ExtResource( 1 )
+__meta__ = {
+"_edit_lock_": true
+}
 target_size = Vector2( 64, 64 )
 
-[node name="GridController" type="Node" parent="GridContext/Fiend"]
-script = ExtResource( 3 )
+[node name="4WayController" parent="GridContext/Player" instance=ExtResource( 3 )]
+
+[node name="Camera2D" type="Camera2D" parent="GridContext/Player"]
+position = Vector2( 32, 32 )
+__meta__ = {
+"_edit_lock_": true
+}

scenes/tiles/Brickwall.tscn

@@ -0,0 +1,10 @@
+[gd_scene load_steps=3 format=2]
+
+[ext_resource path="res://art/tiles/brickwall.png" type="Texture" id=1]
+[ext_resource path="res://nodes/TileMapTileDescriptor.gd" type="Script" id=2]
+
+[node name="Brickwall" type="Node"]
+script = ExtResource( 2 )
+texture = ExtResource( 1 )
+is_solid = true
+id = "tk.Brickwall"