90 lines
3.1 KiB
GDScript
90 lines
3.1 KiB
GDScript
class_name PropVisuals
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extends RefCounted
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## Shared custom-prop drawing and collision approximation.
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const CIRCLE_SEGMENTS: int = 24
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static func build(parent: Node2D, shapes: Array[Dictionary]) -> Rect2:
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var bounds := Rect2()
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var has_bounds := false
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for index: int in shapes.size():
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var shape: Dictionary = shapes[index]
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var points := _shape_points(shape)
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if points.size() < 2:
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push_warning("PropVisuals: skipped shape with insufficient points.")
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continue
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var group := Node2D.new()
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group.name = "Shape_%d" % index
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parent.add_child(group)
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var closed := bool(shape.get("closed", String(shape.get("shape_type", "")) != "line"))
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var fill := Color.from_string(String(shape.get("fill_color", "")), Color.WHITE)
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var outline := Color.from_string(String(shape.get("outline_color", "")), Color.BLACK)
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var width: float = maxf(0.0, float(shape.get("outline_width", 2.0)))
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if closed and points.size() >= 3:
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var polygon := Polygon2D.new()
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polygon.name = "Polygon2D"
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polygon.polygon = points
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polygon.color = fill
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group.add_child(polygon)
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var line := Line2D.new()
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line.name = "Line2D"
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var loop: PackedVector2Array = points.duplicate()
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if closed:
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loop.append(points[0])
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line.points = loop
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line.default_color = outline
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line.width = width
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line.joint_mode = Line2D.LINE_JOINT_ROUND
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line.begin_cap_mode = Line2D.LINE_CAP_ROUND
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line.end_cap_mode = Line2D.LINE_CAP_ROUND
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group.add_child(line)
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for point: Vector2 in points:
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if not has_bounds:
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bounds = Rect2(point, Vector2.ZERO)
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has_bounds = true
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else:
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bounds = bounds.expand(point)
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return bounds
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static func collision_hull(shapes: Array[Dictionary]) -> PackedVector2Array:
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var points := PackedVector2Array()
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for shape: Dictionary in shapes:
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var closed := bool(shape.get("closed", String(shape.get("shape_type", "")) != "line"))
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if closed:
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points.append_array(_shape_points(shape))
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if points.size() < 3:
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return PackedVector2Array()
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var hull: PackedVector2Array = Geometry2D.convex_hull(points)
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if hull.size() < 3 or absf(_polygon_area(hull)) <= 0.001:
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return PackedVector2Array()
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return hull
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static func _shape_points(shape: Dictionary) -> PackedVector2Array:
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var raw: Variant = shape.get("points", PackedVector2Array())
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var points := PackedVector2Array()
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if raw is PackedVector2Array:
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points = raw as PackedVector2Array
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elif raw is Array:
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for item: Variant in raw as Array:
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if item is Vector2:
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points.append(item as Vector2)
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elif item is Dictionary:
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var data: Dictionary = item as Dictionary
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points.append(Vector2(float(data.get("x", 0.0)), float(data.get("y", 0.0))))
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if points.is_empty() and String(shape.get("shape_type", "")) == "circle":
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var radius: float = maxf(0.0, float(shape.get("radius", 24.0)))
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for index: int in CIRCLE_SEGMENTS:
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var angle: float = TAU * float(index) / float(CIRCLE_SEGMENTS)
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points.append(Vector2(cos(angle), sin(angle)) * radius)
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return points
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static func _polygon_area(points: PackedVector2Array) -> float:
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var area: float = 0.0
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for index: int in points.size():
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var next: Vector2 = points[(index + 1) % points.size()]
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area += points[index].cross(next)
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return area * 0.5
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