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45 lines
1.2 KiB
45 lines
1.2 KiB
class_name BlockRegion |
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extends RefCounted |
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static var LOCAL_CHUNK := BlockRegion.new(Vector2i.ZERO, Vector2i.ONE * (Chunk.SIZE - 1)) |
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var min: Vector2i |
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var max: Vector2i |
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func _init(a: Vector2i, b: Vector2i) -> void: |
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min = a.min(b) |
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max = a.max(b) |
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func size() -> Vector2i: |
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return max - min + Vector2i.ONE |
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func contains(pos: Vector2i) -> bool: |
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return (pos.x >= min.x) && (pos.x <= max.x) and (pos.y >= min.y) && (pos.y <= max.y) |
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func offset(value: Vector2i) -> BlockRegion: |
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return BlockRegion.new(min + value, max + value) |
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func extend(amount: int) -> BlockRegion: |
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var v := Vector2i.ONE * amount |
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return BlockRegion.new(min - v, max + v) |
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func array_index(pos: Vector2i) -> int: |
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assert(contains(pos)) |
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var size := size() |
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var index := (pos.x - min.x) + (pos.y - min.y) * size.x |
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return clampi(index, 0, size.x * size.y) |
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# Custom iterators in GDScript are WEIRD. |
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func _iter_init(state: Array) -> bool: |
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state[0] = min |
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return true |
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func _iter_next(state: Array) -> bool: |
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var cur: Vector2i = state[0] |
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if cur.x < max.x: state[0].x += 1; return true |
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elif cur.y < max.y: state[0] = Vector2i(min.x, cur.y + 1); return true |
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else: return false |
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func _iter_get(state: Variant) -> Vector2i: |
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return state
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