Steven Wroblewski
9921aba63a
Jede Grafik auf dem Spielfeld bekommt eine Kennung. Art zeichnet sie im gewählten Stil oder aus einem Bild gleichen Namens unter game/art. ArtStyle zeichnet vorerst schlichte Platzhalter. TileShape beschreibt die Nachbarn einer Kachel, damit Felsmassen außen rund und innen geschlossen gezeichnet werden können. Die drei Stile Warm, Pastell und Glimmen gibt es schon mit Namen, noch ohne eigene Zeichnungen. Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
50 lines
1.8 KiB
GDScript
50 lines
1.8 KiB
GDScript
class_name TileShape
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extends RefCounted
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## Neighbourhoods on the tile grid, so that a style can draw each tile to fit
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## the tiles around it, and a stable number per tile for small variations.
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## Bits of a neighbour mask, clockwise from north.
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const N := 1
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const NE := 2
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const E := 4
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const SE := 8
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const S := 16
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const SW := 32
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const W := 64
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const NW := 128
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## Where the neighbour of each bit lies, in the order of the bits.
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const OFFSETS: Array[Vector2i] = [
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Vector2i(0, -1), Vector2i(1, -1), Vector2i(1, 0), Vector2i(1, 1),
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Vector2i(0, 1), Vector2i(-1, 1), Vector2i(-1, 0), Vector2i(-1, -1),
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]
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## One byte per tile of `codes`: 1 if `members` holds its code, else 0.
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static func flags(codes: PackedByteArray, members: Array[int]) -> PackedByteArray:
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var result := PackedByteArray()
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result.resize(codes.size())
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for index in codes.size():
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result[index] = 1 if members.has(codes[index]) else 0
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return result
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## The neighbours of `tile` whose flag is 1, as a mask of the bits above, on
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## a map of `width` by `height` tiles. Beyond the edge of the map, every
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## neighbour counts as set if `outside_set` is true.
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static func mask(tile_flags: PackedByteArray, width: int, height: int, tile: Vector2i, outside_set: bool) -> int:
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var result := 0
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for bit in 8:
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var at := tile + OFFSETS[bit]
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var inside := at.x >= 0 and at.y >= 0 and at.x < width and at.y < height
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if (inside and tile_flags[at.y * width + at.x] == 1) or (not inside and outside_set):
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result |= 1 << bit
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return result
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## A number from 0 to 2147483647 that is the same for `tile` every time and
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## looks random from one tile to the next.
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static func variant(tile: Vector2i) -> int:
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var h := (tile.x * 374761393 + tile.y * 668265263) & 0x7fffffff
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h = ((h ^ (h >> 13)) * 1274126177) & 0x7fffffff
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return h ^ (h >> 16)
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