/**
 * The Blood River and the dragon ground at the heart of the Dreadwoods.
 *
 * The river crosses the whole square: in under the west wall, east through
 * the middle of the woods, out under the east wall. A branch breaks off it
 * at the centre and runs north through a ring of crag into the Blood Lake,
 * where the dragons live. The west gate sits just under the river, so the
 * way in from the west walks the south bank all the way to the crossing.
 *
 * This file is the geometry contract, like brokenRoad.ts: the backend carves
 * water and lays the ground from these helpers, the client tints the water
 * and the map from the same bounds, and the zone descriptor and admin links
 * read the same tiles. All coordinates are world tiles.
 */
/** The river's base line, south of the dragon ring, north of the mine. */
export declare const BLOOD_RIVER_BASE_Z = 544;
/** Centre line of the west-east run at column x. */
export declare function bloodRiverCenterZ(x: number): number;
/** Half-width of the run at column x: mostly 3 tiles wide, pooling to 5. */
export declare function bloodRiverHalfWidth(x: number): number;
/** Deterministic per-tile noise shared by every consumer of this file. */
export declare function bloodHash(x: number, z: number): number;
/** True on a water tile of the main west-east run. */
export declare function inBloodRiver(x: number, z: number): boolean;
export declare const BLOOD_BRANCH_BASE_X: number;
/** Centre line of the branch at row z. */
export declare function bloodBranchCenterX(z: number): number;
export declare const BLOOD_BRANCH_HALF_W = 1;
export declare const BLOOD_LAKE_CX = 462;
export declare const BLOOD_LAKE_CZ = 471;
export declare function inBloodLake(x: number, z: number): boolean;
export declare const DRAGON_RING_CX = 463;
export declare const DRAGON_RING_CZ = 478;
export declare const DRAGON_RING_RX = 52;
export declare const DRAGON_RING_RZ = 44;
/** Normalised radial distance from the ring centre: 1 is the ring line. */
export declare function dragonRingRadial(x: number, z: number): number;
/** Where the ring's south arc sits at column x (for pillars and the gap). */
export declare function dragonRingSouthZ(x: number): number;
/** The walk-in gap on the south arc, flanked by the ruined pillars. */
export declare const DRAGON_GATE_PATH_X: number;
export declare const DRAGON_GATE_MIN_X: number;
export declare const DRAGON_GATE_MAX_X: number;
/** The river gap on the south arc, where the branch runs out to the river. */
export declare const DRAGON_RIVER_GAP_MIN_X: number;
export declare const DRAGON_RIVER_GAP_MAX_X: number;
/** True where the ring must stay open (the gate, and the branch water). */
export declare function inDragonRingGap(x: number, z: number): boolean;
/** The main crossing: a three-plank bridge on the gate path's own axis. */
export declare const BLOOD_BRIDGE_X: number;
export declare const BLOOD_BRIDGE_HALF_W = 1;
/** The small crossing inside the ring, over the branch east of the path. */
export declare const BRANCH_BRIDGE_Z = 510;
export declare const BRANCH_BRIDGE_HALF_D = 1;
/** South-bank road rows: the river's edge plus this offset, two rows deep. */
export declare const RIVER_ROAD_BANK_OFFSET = 2;
/**
 * The Dirt the way uses, as opposed to the Dirt of the banks: the south-bank
 * road from the west gate to the crossing, the crossing's axis up to the
 * ring gap, and inside the ring the gate path down to the lake, the fork
 * east over the inner crossing and the spur up to the quarry. The backend
 * lays these; the client keeps a track's colour on them where the bank
 * soil around them goes dark.
 */
export declare function onBloodRiverRoad(x: number, z: number): boolean;
/**
 * Well north of the frost wall (NORTHERN_WALL_Z is 450), so the gate is
 * reached through the wall's own gate and the ice country beyond it, not
 * from the goblin side. It stood just under the river (BLOOD_RIVER_BASE_Z
 * + 6 = 486) until 2026-09-18; a wall road inside the west wall now runs
 * from the gate down to the river road (bloodRiver.ts, step 4).
 */
export declare const DREADWOODS_WEST_GATE_Z = 474;
export declare const DREADWOODS_WEST_GATE_HALF_W = 2;
/** The wall road's two columns, just inside the west wall. */
export declare const BLOOD_WALL_ROAD_X: number;
/**
 * The wall road: two wide inside the west wall, from the west gate's throat
 * down to the south-bank road, planked over the river's west end where it
 * crosses (the backend's carve lays the deck; without it the river cut the
 * road and the gate's way to the bank ran round by the main crossing).
 */
export declare function onBloodWallRoad(x: number, z: number): boolean;
export declare function inDreadwoodsWestGate(x: number, z: number): boolean;
/** Nests on the western rise, each a clutch of eggs in a stone bowl. */
export declare const DRAGON_NESTS: readonly {
    x: number;
    z: number;
}[];
/** The looted quarry camp on the east side, under the dragons' banner. */
export declare const DRAGON_QUARRY: {
    readonly x: 499;
    readonly z: 470;
};
/**
 * Where the dragons stand. The old one holds the lake's south shore where
 * the path arrives; the rest keep the nests and the quarry. Scale is the
 * visual size sent to clients: the old one is half again the others.
 *
 * Cut from six to four (James, 2026-09-25: "less dragons in the dragon
 * area"): the old one, two of the three nest guards, and the quarry guard.
 */
export declare const DRAGON_SPAWNS: readonly {
    x: number;
    z: number;
    scale?: number;
}[];
/**
 * Chart and 3D mid-tone. Deep and shallow sit either side for depth. Dark
 * on purpose: the sheet is blood, near black in the body and only a
 * little brighter where it meets the bank, and the 3D tile colour under
 * the water has to agree with the shader or the bank corners bleed pink.
 */
export declare const BLOOD_WATER_COLOR = "#7a1014";
export declare const BLOOD_WATER_COLOR_DEEP = "#26040a";
export declare const BLOOD_WATER_COLOR_SHALLOW = "#861a1e";
export declare const BLOOD_WATER_BOUNDS: {
    readonly minX: number;
    readonly maxX: number;
    readonly minZ: number;
    readonly maxZ: number;
};
/** True on a water tile of the north branch, lake to the main run. */
export declare function inBloodBranch(x: number, z: number): boolean;
/**
 * True where Dreadwoods water is blood, not the default blue. The Blood
 * Mire's pools count (2026-09-26): they lie in BLOOD_WATER_BOUNDS for the
 * water sheet, and this is what the bed, the banks and the map read.
 */
export declare function isBloodWater(x: number, z: number): boolean;
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