589 lines
18 KiB
GDScript
589 lines
18 KiB
GDScript
class_name SurfaceDrawingCanvas
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extends Node3D
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const GUIDED_PIXEL_FILL: float = 0.88
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const SURFACE_OFFSET: float = 0.012
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const LAYER_OFFSET_STEP: float = 0.0002
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const SURFACE_SAMPLE_DEPTH: float = 0.45
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var canvas_id: String = ""
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var grid_width: int = 0
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var grid_height: int = 0
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var cell_size: float = 0.0
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var revision: int = -1
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var creator_fingerprint: String = ""
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var participant_fingerprints: Array[String] = []
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var _surface_origin: Vector3
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var _surface_normal: Vector3
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var _surface_tangent: Vector3
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var _surface_bitangent: Vector3
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var _cells: Dictionary[int, Dictionary] = {}
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var _cell_surface_transforms: Array[Transform3D] = []
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var _pixel_image: Image
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var _pixel_texture: ImageTexture
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var _pixel_instance: MeshInstance3D
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var _grid_instance: MeshInstance3D
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var _guide_visible: bool = true
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var _finalized: bool = false
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var _layer: int = 0
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var _stencil_requested_visible: bool = false
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var _relationships: PlayerRelationshipStore
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var _solid_surface_mask: int = 1
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func setup(
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data: Dictionary,
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relationships: PlayerRelationshipStore,
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solid_surface_mask: int = 1,
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) -> bool:
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if not SurfaceDrawingProtocol.validate_canvas_state(data):
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return false
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canvas_id = str(data["canvas_id"])
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grid_width = int(data["width"])
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grid_height = int(data["height"])
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cell_size = float(data["cell_size"])
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revision = int(data["revision"])
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creator_fingerprint = str(data["creator_fingerprint"])
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participant_fingerprints = _participants_from_state(data)
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_finalized = bool(data.get("finalized", false))
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_guide_visible = bool(data.get("guide_visible", true)) and not _finalized
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_layer = int(data.get("layer", 0))
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_surface_origin = SurfaceDrawingProtocol.array_to_vector(data["origin"])
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_surface_normal = SurfaceDrawingProtocol.array_to_vector(
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data["normal"]
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).normalized()
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_surface_tangent = SurfaceDrawingProtocol.array_to_vector(
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data["tangent"]
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)
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_surface_tangent = (
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_surface_tangent - _surface_normal * _surface_tangent.dot(_surface_normal)
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).normalized()
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if _surface_normal.is_zero_approx() or _surface_tangent.is_zero_approx():
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return false
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_surface_bitangent = _surface_normal.cross(_surface_tangent).normalized()
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_relationships = relationships
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_solid_surface_mask = solid_surface_mask
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_cells.clear()
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for cell_value: Variant in data["cells"]:
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var cell: Dictionary = cell_value
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_cells[_cell_key(int(cell["x"]), int(cell["y"]))] = cell.duplicate(true)
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_build_grid()
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_build_pixel_renderer()
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return true
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func apply_update(data: Dictionary) -> bool:
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if (
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not SurfaceDrawingProtocol.validate_canvas_update(data)
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or str(data["canvas_id"]) != canvas_id
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or int(data["revision"]) <= revision
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):
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return false
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for edit_value: Variant in data["edits"]:
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var edit: Dictionary = edit_value
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var key: int = _cell_key(int(edit["x"]), int(edit["y"]))
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if str(edit["color_id"]).is_empty():
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_cells.erase(key)
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else:
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_cells[key] = edit.duplicate(true)
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participant_fingerprints = _participants_from_update(
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data, participant_fingerprints
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)
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revision = int(data["revision"])
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if is_hidden_by_relationship():
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_rebuild_pixel_image()
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else:
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_apply_pixel_edits(data["edits"])
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_refresh_grid_visibility()
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return true
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func apply_guide_update(data: Dictionary) -> bool:
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if (
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not SurfaceDrawingProtocol.validate_guide_update(data)
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or str(data["canvas_id"]) != canvas_id
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or int(data["revision"]) <= revision
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):
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return false
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revision = int(data["revision"])
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participant_fingerprints = _participants_from_update(
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data, participant_fingerprints
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)
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_finalized = bool(data["finalized"])
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_guide_visible = bool(data["guide_visible"]) and not _finalized
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if _finalized:
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_destroy_grid()
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else:
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_refresh_grid_visibility()
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return true
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func refresh_relationship_visibility() -> void:
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_rebuild_pixel_image()
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if _pixel_instance != null:
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_pixel_instance.visible = not is_hidden_by_relationship()
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_refresh_grid_visibility()
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func is_hidden_by_relationship() -> bool:
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if _relationships == null:
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return false
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for fingerprint: String in participant_fingerprints:
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if _relationships.is_blocked(fingerprint):
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return true
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return false
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func set_stencil_visible(should_be_visible: bool) -> void:
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_stencil_requested_visible = should_be_visible
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_refresh_grid_visibility()
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func is_guide_visible() -> bool:
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return _guide_visible
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func is_finalized() -> bool:
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return _finalized
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func get_rendered_pixel_size() -> float:
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return cell_size
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func get_rendered_pixel_count() -> int:
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if is_hidden_by_relationship():
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return 0
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var count: int = 0
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for cell: Dictionary in _cells.values():
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if not _visible_cell_color(cell).is_equal_approx(Color.TRANSPARENT):
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count += 1
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return count
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func get_export_image() -> Image:
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if _pixel_image == null or _pixel_image.is_empty():
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return null
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return _pixel_image.duplicate() as Image
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func has_guide_geometry() -> bool:
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return _grid_instance != null and is_instance_valid(_grid_instance)
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func contains_world_point(world_point: Vector3, tolerance: float = 0.3) -> bool:
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var relative: Vector3 = world_point - _surface_origin
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if absf(relative.dot(_surface_normal)) > tolerance:
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return false
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var half_width: float = float(grid_width) * cell_size * 0.5
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var half_height: float = float(grid_height) * cell_size * 0.5
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var horizontal: float = relative.dot(_surface_tangent)
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var vertical: float = relative.dot(_surface_bitangent)
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return (
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horizontal >= -half_width
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and horizontal < half_width
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and vertical >= -half_height
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and vertical < half_height
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)
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func get_surface_plane_distance(world_point: Vector3) -> float:
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return absf((world_point - _surface_origin).dot(_surface_normal))
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func cell_at_world_point(world_point: Vector3) -> Vector2i:
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var relative: Vector3 = world_point - _surface_origin
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var half_width: float = float(grid_width) * cell_size * 0.5
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var half_height: float = float(grid_height) * cell_size * 0.5
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var x: int = floori(
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(relative.dot(_surface_tangent) + half_width) / cell_size
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)
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var y: int = floori(
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(relative.dot(_surface_bitangent) + half_height) / cell_size
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)
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if x < 0 or x >= grid_width or y < 0 or y >= grid_height:
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return Vector2i(-1, -1)
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return Vector2i(x, y)
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func get_cell_world_position(x: int, y: int) -> Vector3:
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var horizontal: float = (
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(float(x) + 0.5 - float(grid_width) * 0.5) * cell_size
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)
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var vertical: float = (
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(float(y) + 0.5 - float(grid_height) * 0.5) * cell_size
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)
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return (
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_surface_origin
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+ _surface_tangent * horizontal
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+ _surface_bitangent * vertical
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)
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func get_surface_normal() -> Vector3:
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return _surface_normal
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func get_surface_tangent() -> Vector3:
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return _surface_tangent
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func get_surface_bitangent() -> Vector3:
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return _surface_bitangent
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func get_cell_surface_transform(
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x: int,
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y: int,
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fill: float = 0.94,
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) -> Transform3D:
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if x < 0 or x >= grid_width or y < 0 or y >= grid_height:
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return Transform3D.IDENTITY
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var key: int = _cell_key(x, y)
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var local_transform: Transform3D = (
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_cell_surface_transforms[key]
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if key >= 0 and key < _cell_surface_transforms.size()
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else _sample_cell_transform(x, y, 1.0)
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)
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var scaled_basis: Basis = local_transform.basis
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var resolved_fill: float = clampf(fill, 0.05, 1.0)
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scaled_basis.x *= resolved_fill
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scaled_basis.y *= resolved_fill
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local_transform.basis = scaled_basis
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return global_transform * local_transform
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func get_authoritative_cells() -> Array[Dictionary]:
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var result: Array[Dictionary] = []
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for value: Dictionary in _cells.values():
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result.append(value.duplicate(true))
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result.sort_custom(func(a: Dictionary, b: Dictionary) -> bool:
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var a_key: int = _cell_key(int(a["x"]), int(a["y"]))
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var b_key: int = _cell_key(int(b["x"]), int(b["y"]))
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return a_key < b_key
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)
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return result
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func _build_grid() -> void:
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if _grid_instance != null:
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_grid_instance.queue_free()
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_grid_instance = null
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if _finalized:
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return
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var immediate := ImmediateMesh.new()
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var material := StandardMaterial3D.new()
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material.shading_mode = BaseMaterial3D.SHADING_MODE_UNSHADED
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material.transparency = BaseMaterial3D.TRANSPARENCY_ALPHA
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material.albedo_color = Color(0.75, 0.94, 0.96, 0.38)
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material.no_depth_test = false
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immediate.surface_begin(Mesh.PRIMITIVE_LINES, material)
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var half_width: float = float(grid_width) * cell_size * 0.5
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var half_height: float = float(grid_height) * cell_size * 0.5
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var sampled_vertices: Dictionary[Vector2i, Dictionary] = {}
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for x: int in range(grid_width + 1):
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var horizontal: float = -half_width + float(x) * cell_size
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for y_segment: int in range(grid_height):
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var start_vertical: float = (
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-half_height + float(y_segment) * cell_size
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)
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_add_grid_vertex(
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immediate,
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_surface_origin + _surface_tangent * horizontal
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+ _surface_bitangent * start_vertical,
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Vector2i(x, y_segment),
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sampled_vertices,
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)
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_add_grid_vertex(
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immediate,
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_surface_origin + _surface_tangent * horizontal
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+ _surface_bitangent * (start_vertical + cell_size),
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Vector2i(x, y_segment + 1),
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sampled_vertices,
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)
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for y: int in range(grid_height + 1):
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var vertical: float = -half_height + float(y) * cell_size
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for x_segment: int in range(grid_width):
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var start_horizontal: float = (
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-half_width + float(x_segment) * cell_size
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)
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_add_grid_vertex(
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immediate,
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_surface_origin + _surface_tangent * start_horizontal
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+ _surface_bitangent * vertical,
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Vector2i(x_segment, y),
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sampled_vertices,
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)
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_add_grid_vertex(
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immediate,
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_surface_origin
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+ _surface_tangent * (start_horizontal + cell_size)
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+ _surface_bitangent * vertical,
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Vector2i(x_segment + 1, y),
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sampled_vertices,
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)
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immediate.surface_end()
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_grid_instance = MeshInstance3D.new()
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_grid_instance.name = "PixelGrid"
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_grid_instance.mesh = immediate
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_grid_instance.cast_shadow = GeometryInstance3D.SHADOW_CASTING_SETTING_OFF
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add_child(_grid_instance)
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_refresh_grid_visibility()
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func _add_grid_vertex(
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immediate: ImmediateMesh,
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world_point: Vector3,
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grid_point: Vector2i,
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sampled_vertices: Dictionary[Vector2i, Dictionary],
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) -> void:
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var sampled: Dictionary = sampled_vertices.get(grid_point, {})
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if sampled.is_empty():
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sampled = _sample_surface(world_point)
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sampled_vertices[grid_point] = sampled
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var point: Vector3 = sampled["position"]
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var normal: Vector3 = sampled["normal"]
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immediate.surface_add_vertex(
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to_local(point + normal * (_surface_offset() * 1.5))
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)
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func _build_pixel_renderer() -> void:
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if _pixel_instance != null:
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_pixel_instance.queue_free()
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_pixel_instance = null
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var cell_count: int = grid_width * grid_height
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var vertices := PackedVector3Array()
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var texture_coordinates := PackedVector2Array()
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var indices := PackedInt32Array()
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vertices.resize(cell_count * 4)
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texture_coordinates.resize(cell_count * 4)
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indices.resize(cell_count * 6)
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_cell_surface_transforms.clear()
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_cell_surface_transforms.resize(cell_count)
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for y: int in range(grid_height):
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for x: int in range(grid_width):
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var cell_index: int = _cell_key(x, y)
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var surface_transform := _sample_cell_transform(x, y, 1.0)
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_cell_surface_transforms[cell_index] = surface_transform
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var center: Vector3 = surface_transform.origin
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var horizontal: Vector3 = surface_transform.basis.x * 0.5
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var vertical: Vector3 = surface_transform.basis.y * 0.5
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var vertex_offset: int = cell_index * 4
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vertices[vertex_offset] = center - horizontal - vertical
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vertices[vertex_offset + 1] = center + horizontal - vertical
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vertices[vertex_offset + 2] = center + horizontal + vertical
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vertices[vertex_offset + 3] = center - horizontal + vertical
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var image_row: int = _image_y(y)
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var u_min: float = float(x) / float(grid_width)
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var u_max: float = float(x + 1) / float(grid_width)
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var v_min: float = float(image_row) / float(grid_height)
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var v_max: float = float(image_row + 1) / float(grid_height)
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texture_coordinates[vertex_offset] = Vector2(u_min, v_max)
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texture_coordinates[vertex_offset + 1] = Vector2(u_max, v_max)
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texture_coordinates[vertex_offset + 2] = Vector2(u_max, v_min)
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texture_coordinates[vertex_offset + 3] = Vector2(u_min, v_min)
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var index_offset: int = cell_index * 6
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indices[index_offset] = vertex_offset
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indices[index_offset + 1] = vertex_offset + 1
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indices[index_offset + 2] = vertex_offset + 2
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indices[index_offset + 3] = vertex_offset
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indices[index_offset + 4] = vertex_offset + 2
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indices[index_offset + 5] = vertex_offset + 3
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_rebuild_pixel_image()
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var arrays: Array = []
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arrays.resize(Mesh.ARRAY_MAX)
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arrays[Mesh.ARRAY_VERTEX] = vertices
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arrays[Mesh.ARRAY_TEX_UV] = texture_coordinates
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arrays[Mesh.ARRAY_INDEX] = indices
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var mesh := ArrayMesh.new()
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mesh.add_surface_from_arrays(Mesh.PRIMITIVE_TRIANGLES, arrays)
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var material := StandardMaterial3D.new()
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material.shading_mode = BaseMaterial3D.SHADING_MODE_UNSHADED
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material.albedo_color = Color.WHITE
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material.albedo_texture = _pixel_texture
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material.texture_filter = BaseMaterial3D.TEXTURE_FILTER_NEAREST
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material.transparency = BaseMaterial3D.TRANSPARENCY_ALPHA_SCISSOR
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material.alpha_scissor_threshold = 0.5
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material.cull_mode = BaseMaterial3D.CULL_DISABLED
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mesh.surface_set_material(0, material)
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_pixel_instance = MeshInstance3D.new()
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_pixel_instance.name = "ArtworkTexture"
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_pixel_instance.mesh = mesh
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_pixel_instance.cast_shadow = GeometryInstance3D.SHADOW_CASTING_SETTING_OFF
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add_child(_pixel_instance)
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_pixel_instance.visible = not is_hidden_by_relationship()
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func _rebuild_pixel_image() -> void:
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if (
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_pixel_image == null
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or _pixel_image.get_width() != grid_width
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or _pixel_image.get_height() != grid_height
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):
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_pixel_image = Image.create(
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grid_width, grid_height, false, Image.FORMAT_RGBA8
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)
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_pixel_image.fill(Color.TRANSPARENT)
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if not is_hidden_by_relationship():
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for cell: Dictionary in _cells.values():
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_set_image_cell(int(cell["x"]), int(cell["y"]), cell)
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if _pixel_texture == null:
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_pixel_texture = ImageTexture.create_from_image(_pixel_image)
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else:
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_pixel_texture.update(_pixel_image)
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func _apply_pixel_edits(edits: Array) -> void:
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if _pixel_image == null or _pixel_texture == null:
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_rebuild_pixel_image()
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return
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for edit_value: Variant in edits:
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var edit: Dictionary = edit_value
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var x: int = int(edit["x"])
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var y: int = int(edit["y"])
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var cell: Dictionary = _cells.get(_cell_key(x, y), {})
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_set_image_cell(x, y, cell)
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_pixel_texture.update(_pixel_image)
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func _set_image_cell(x: int, y: int, cell: Dictionary) -> void:
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if (
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_pixel_image == null
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or x < 0
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or x >= grid_width
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or y < 0
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or y >= grid_height
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):
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return
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_pixel_image.set_pixel(x, _image_y(y), _visible_cell_color(cell))
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func _visible_cell_color(cell: Dictionary) -> Color:
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if cell.is_empty():
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return Color.TRANSPARENT
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var color_id := StringName(str(cell.get("color_id", "")))
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return (
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SurfaceDrawingPalette.get_color(color_id)
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if SurfaceDrawingPalette.has_color(color_id)
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else Color.TRANSPARENT
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)
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func _image_y(cell_y: int) -> int:
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return grid_height - 1 - cell_y
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func _sample_cell_transform(
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x: int,
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y: int,
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fill: float = GUIDED_PIXEL_FILL,
|
|
) -> Transform3D:
|
|
var expected: Vector3 = get_cell_world_position(x, y)
|
|
var sampled: Dictionary = _sample_surface(expected)
|
|
var point: Vector3 = sampled["position"]
|
|
var normal: Vector3 = sampled["normal"]
|
|
var tangent: Vector3 = (
|
|
_surface_tangent - normal * _surface_tangent.dot(normal)
|
|
).normalized()
|
|
if tangent.is_zero_approx():
|
|
tangent = normal.cross(Vector3.UP).normalized()
|
|
if tangent.is_zero_approx():
|
|
tangent = Vector3.RIGHT
|
|
var bitangent: Vector3 = normal.cross(tangent).normalized()
|
|
var pixel_size: float = cell_size * clampf(fill, 0.05, 1.0)
|
|
var cell_basis := Basis(
|
|
tangent * pixel_size,
|
|
bitangent * pixel_size,
|
|
normal,
|
|
)
|
|
return Transform3D(
|
|
cell_basis,
|
|
to_local(point + normal * _surface_offset()),
|
|
)
|
|
|
|
|
|
func _sample_surface(expected: Vector3) -> Dictionary:
|
|
var point: Vector3 = expected
|
|
var normal: Vector3 = _surface_normal
|
|
var world: World3D = get_world_3d()
|
|
if world != null:
|
|
var query := PhysicsRayQueryParameters3D.create(
|
|
expected + _surface_normal * SURFACE_SAMPLE_DEPTH,
|
|
expected - _surface_normal * SURFACE_SAMPLE_DEPTH,
|
|
_solid_surface_mask,
|
|
)
|
|
query.collide_with_areas = false
|
|
query.collide_with_bodies = true
|
|
var hit: Dictionary = world.direct_space_state.intersect_ray(query)
|
|
if (
|
|
not hit.is_empty()
|
|
and hit.get("collider") is StaticBody3D
|
|
):
|
|
var hit_normal: Vector3 = hit.get("normal", _surface_normal)
|
|
if hit_normal.dot(_surface_normal) >= 0.35:
|
|
var hit_position: Vector3 = hit.get("position", expected)
|
|
point = hit_position
|
|
normal = hit_normal.normalized()
|
|
return {"position": point, "normal": normal}
|
|
|
|
|
|
func _surface_offset() -> float:
|
|
return SURFACE_OFFSET + float(_layer) * LAYER_OFFSET_STEP
|
|
|
|
|
|
func _destroy_grid() -> void:
|
|
if _grid_instance == null:
|
|
return
|
|
_grid_instance.queue_free()
|
|
_grid_instance = null
|
|
|
|
|
|
func _refresh_grid_visibility() -> void:
|
|
if _grid_instance != null:
|
|
_grid_instance.visible = (
|
|
_stencil_requested_visible
|
|
and _guide_visible
|
|
and not is_hidden_by_relationship()
|
|
)
|
|
|
|
|
|
func _participants_from_state(data: Dictionary) -> Array[String]:
|
|
var result: Array[String] = []
|
|
_append_participant(result, str(data.get("creator_fingerprint", "")))
|
|
for value: Variant in data.get("participant_fingerprints", []):
|
|
_append_participant(result, str(value))
|
|
for cell_value: Variant in data.get("cells", []):
|
|
var cell: Dictionary = cell_value
|
|
_append_participant(
|
|
result, str(cell.get("author_fingerprint", ""))
|
|
)
|
|
return result
|
|
|
|
|
|
func _participants_from_update(
|
|
data: Dictionary,
|
|
fallback: Array[String],
|
|
) -> Array[String]:
|
|
var result: Array[String] = fallback.duplicate()
|
|
for value: Variant in data.get("participant_fingerprints", []):
|
|
_append_participant(result, str(value))
|
|
for edit_value: Variant in data.get("edits", []):
|
|
var edit: Dictionary = edit_value
|
|
_append_participant(
|
|
result, str(edit.get("author_fingerprint", ""))
|
|
)
|
|
return result
|
|
|
|
|
|
func _append_participant(result: Array[String], fingerprint: String) -> void:
|
|
if (
|
|
NetworkIdentityCrypto.valid_fingerprint(fingerprint)
|
|
and fingerprint not in result
|
|
):
|
|
result.append(fingerprint)
|
|
|
|
|
|
func _cell_key(x: int, y: int) -> int:
|
|
return y * grid_width + x
|