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2026-08-02 02:20:02 -04:00
parent 61669627db
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+extends Object
+class_name SakuraPalette
+
+## The palette, ported from the Sakura Crossing reference (MIT).
+##
+## Kept as hex strings rather than float triples so every value can be checked
+## against the source line by line. `Color(hex)` parses sRGB, which is what the
+## reference authors in and what a `source_color` shader uniform expects.
+##
+## ── The discipline, which matters more than any individual value ─────────────
+##
+## The palette is deliberately NARROW, and it is narrow in a specific way:
+##
+##   * The masses are pale.  Walls, paving, plaster, concrete and sky are all
+##     high-value and low-saturation. A cel image is read from its dark end, so
+##     the large areas have to stay out of the way or there is nothing left for
+##     the ink line and the shadow bands to be read against.
+##   * The greens lean TEAL, never yellow. A yellow-green mass at this scale
+##     goes sour and fights the pink.
+##   * There are exactly four saturated accents — red, yellow, blue, teal — and
+##     they are reserved for FOCAL objects: the crossing gear, the vending
+##     machines, a shop awning, the torii. If a saturated colour is spread over
+##     a large area it becomes the loudest thing in the frame and the eye stops
+##     going where the level designer wants it to.
+##   * Shadow is a HUE, not a value. Nothing here has a "dark version"; the cel
+##     shader swings every shadow band toward a cool violet instead. That is why
+##     there are so few dark entries in this table — the darks are made by the
+##     light, not by the paint.
+##
+## Deviating from those four rules is what makes a cel scene look like a
+## low-poly 3D scene with a filter on it.
+
+# ── Sky & atmosphere ─────────────────────────────────────────────────────────
+const SKY_TOP := Color("8fbdea")
+const SKY_MID := Color("d4e8fa")
+const SKY_HAZE := Color("fbe7e9")
+const CLOUD := Color("fdfaf8")
+const CLOUD_SHADE := Color("e6e6f2")
+const FOG := Color("e6ecf7")
+const HILL := Color("c6cfe6")
+const HILL_FAR := Color("d8dded")
+
+# ── Light ────────────────────────────────────────────────────────────────────
+const SUN := Color("fff1d8")
+const FILL := Color("a9bdf5")
+const HEMI_SKY := Color("dcecff")
+const HEMI_GROUND := Color("b6a6c6")
+
+# ── Ink ──────────────────────────────────────────────────────────────────────
+const INK := Color("39324f")
+const INK_SOFT := Color("4a4468")
+
+# ── Ground ───────────────────────────────────────────────────────────────────
+const ROAD := Color("8e8a9c")
+const ROAD_WORN := Color("9a95a6")
+const ROAD_DARK := Color("7b7689")
+const LINE_WHITE := Color("f4f2f6")
+const LINE_YELLOW := Color("f0c341")
+const TACTILE := Color("f2c53d")
+const SIDEWALK := Color("dcd8e2")
+const SIDEWALK_ALT := Color("e7e2e6")
+const CURB := Color("c7c2d0")
+const CONCRETE := Color("d9d5dd")
+const CONCRETE_MID := Color("c2bdc8")
+const CONCRETE_DARK := Color("a7a2b0")
+const GUTTER := Color("bdb8c4")
+const DRAIN := Color("6d687a")
+const DIRT := Color("c9bfae")
+const GRAVEL := Color("a9a3ab")
+const BALLAST := Color("7d7686")
+
+# ── Buildings ────────────────────────────────────────────────────────────────
+const WALL_WHITE := Color("faf6ef")
+const WALL_CREAM := Color("f2e7d3")
+const WALL_BLUE := Color("d6e3ee")
+const WALL_BEIGE := Color("e7dbc4")
+const WALL_GRAY := Color("dedee6")
+const WALL_PINK := Color("f0dcda")
+const WALL_TEA := Color("dccdb6")
+const WALL_SAGE := Color("dde2d6")
+const ROOF_SLATE := Color("59617a")
+const ROOF_BLUE := Color("4d5c78")
+const ROOF_BROWN := Color("6b585c")
+const ROOF_TEAL := Color("4f6b70")
+const TRIM := Color("8b8496")
+const GLASS := Color("9dc0d4")
+const GLASS_DARK := Color("53627a")
+const SHUTTER := Color("6e6a7a")
+const SHUTTER_LIGHT := Color("847f92")
+
+## The wall tones, as a list, for generators that want variety by index.
+const WALLS: Array[Color] = [
+	WALL_WHITE, WALL_CREAM, WALL_BLUE, WALL_BEIGE,
+	WALL_GRAY, WALL_PINK, WALL_TEA, WALL_SAGE,
+]
+const ROOFS: Array[Color] = [ROOF_SLATE, ROOF_BLUE, ROOF_BROWN, ROOF_TEAL]
+
+# ── Accents ──────────────────────────────────────────────────────────────────
+# The four saturated colours, plus their deep variants. Focal objects only.
+const RED := Color("e0453f")
+const RED_DEEP := Color("b5322f")
+const RED_SOFT := Color("ef6a60")
+const YELLOW := Color("f4c033")
+const YELLOW_DEEP := Color("d39c1f")
+const BLACK := Color("322e3b")
+const BLACK_SOFT := Color("453f4f")
+const TEAL := Color("2f9c9a")
+const TEAL_DEEP := Color("22736f")
+const BLUE := Color("3d6ec4")
+const BLUE_DEEP := Color("2a4f97")
+const ORANGE := Color("ef8a3c")
+const PURPLE := Color("8f6fb5")
+
+# ── Vegetation ───────────────────────────────────────────────────────────────
+const LEAF := Color("5aa578")
+const LEAF_DEEP := Color("3f7f60")
+const LEAF_PALE := Color("84bd97")
+const GRASS := Color("86ab84")
+const TRUNK := Color("9a8082")
+const TRUNK_DARK := Color("765f62")
+const MOSS := Color("7d9c74")
+const BAMBOO := Color("94b06b")
+const CEDAR := Color("3f6b52")
+
+# ── Cherry blossom ───────────────────────────────────────────────────────────
+const BLOSSOM := Color("fbc6d8")
+const BLOSSOM_LIGHT := Color("fff0f4")
+const BLOSSOM_WARM := Color("fedde2")
+const BLOSSOM_DEEP := Color("f0a3c0")
+const PETAL := Color("fcd9e4")
+const PETAL_DEEP := Color("f6bccf")
+
+# ── Railway ──────────────────────────────────────────────────────────────────
+const RAIL_METAL := Color("6b6472")
+const RAIL_HEAD := Color("c2bcc4")
+const SLEEPER := Color("6d6576")
+const SLEEPER_LIGHT := Color("847b8c")
+const GATE_YELLOW := Color("f4c033")
+const GATE_BLACK := Color("322e3b")
+const SIGNAL_RED := Color("f2453c")
+const SIGNAL_OFF := Color("6a3b44")
+const CABINET := Color("d8d5da")
+const CABINET_TOP := Color("b6b2bc")
+
+# ── Train ────────────────────────────────────────────────────────────────────
+const TRAIN_BODY := Color("f7f2e6")
+const TRAIN_BODY_SHADE := Color("e6dfd0")
+const TRAIN_STRIPE := Color("2f7fd0")
+const TRAIN_STRIPE2 := Color("3fae9a")
+const TRAIN_WINDOW := Color("3a4258")
+const TRAIN_SKIRT := Color("9aa0ad")
+const TRAIN_ROOF := Color("bdb8bd")
+const TRAIN_DOOR := Color("eae4d8")
+
+# ── Metal & props ────────────────────────────────────────────────────────────
+const METAL := Color("b8bcc6")
+const METAL_DARK := Color("878b96")
+const METAL_WARM := Color("c9c0b4")
+const MIRROR_BACK := Color("e4a83c")
+const MIRROR_FACE := Color("c8d8e4")
+const VEND_WHITE := Color("f8f5f0")
+const VEND_RED := Color("db4038")
+const VEND_TEAL := Color("2e9a98")
+const CRATE := Color("3f7fbf")
+const CRATE_ALT := Color("e25a4a")
+const BASKET := Color("db5a4a")
+const BIN := Color("5d8fb8")
+
+## Bright can/bottle colours for vending machine shelves.
+const DRINKS: Array[Color] = [
+	Color("e0453f"), Color("f4c033"), Color("3d6ec4"), Color("2f9c9a"),
+	Color("ef8a3c"), Color("8f6fb5"), Color("5aa578"), Color("f4f2f6"),
+	Color("e86f9c"), Color("44b4d8"), Color("c94f7a"), Color("9dbb3c"),
+]
+
+# ── Shopping street ──────────────────────────────────────────────────────────
+const AWNING_GREEN := Color("4f8f6a")
+const AWNING_ORANGE := Color("e08a3c")
+const AWNING_BLUE := Color("4a7fae")
+const AWNING_CREAM := Color("efe0c2")
+const LANTERN := Color("f6e2c0")
+const LANTERN_LIT := Color("ffd9a0")
+const NOREN := Color("2f4a72")
+const NOREN_RED := Color("b5322f")
+const NOREN_CREAM := Color("f2e8d6")
+const AWNINGS: Array[Color] = [
+	AWNING_GREEN, AWNING_ORANGE, AWNING_BLUE, AWNING_CREAM,
+	NOREN, NOREN_RED,
+]
+
+# ── Shrine ───────────────────────────────────────────────────────────────────
+const TORII := Color("d8412f")
+const TORII_DEEP := Color("a72f23")
+const SHRINE_WOOD := Color("a9744f")
+const SHRINE_WOOD_DARK := Color("8a604a")
+const SHRINE_ROOF := Color("69707e")
+const SHRINE_STONE := Color("cfcad2")
+const ROPE := Color("f0e5ca")
+const EMA := Color("e9d9b6")
+
+# ── Stone & water ────────────────────────────────────────────────────────────
+const STONE := Color("c6c0cb")
+const STONE_DARK := Color("a39daf")
+const STONE_WARM := Color("cfc6bc")
+const WATER := Color("93b8ce")
+const WATER_DEEP := Color("6d90ad")
+const WATER_SKY := Color("cadff0")
+const WATER_PETAL := Color("f3cada")
+
+
+## ── Shadow tints ─────────────────────────────────────────────────────────────
+##
+## The cool violet each material's shadow bands swing toward. The reference's
+## default is 0x6c5f8c and most things take it; the departures are all the same
+## kind of decision, which is that a shadow keeps a memory of what the surface is
+## MADE of:
+##
+##   TINT_WARM   timber, blossom, clay, lantern paper. Pushing these the full
+##               way to violet turns cedar grey and turns a cherry canopy into a
+##               storm cloud, which is the one thing it may never do.
+##   TINT_COOL   metal, glass, water, rail. These genuinely are cooler in shade
+##               than anything else in the frame, and letting them go further
+##               than the default is most of what makes metal read as metal
+##               without a specular highlight.
+const TINT := Color("6c5f8c")
+const TINT_WARM := Color("8a7286")
+const TINT_COOL := Color("5a5a8c")
+const TINT_FOLIAGE := Color("6a7a8c")