28 lines
882 B
JavaScript
28 lines
882 B
JavaScript
export const TILE_PX = 256;
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export const WORLD_HALF = 16384; // gtadb-Weltgrenze in Metern
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export const CHUNK_SIZE = 250;
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export const SLICE = { x0: -1000, x1: 2000, y0: -500, y1: 2500 };
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export const CHUNKS_PER_SIDE = (SLICE.x1 - SLICE.x0) / CHUNK_SIZE; // 12
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export const worldToThree = (X, Y) => ({ x: X, z: -Y });
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export const threeToWorld = (x, z) => ({ X: x, Y: -z });
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export function tileForWorld(X, Y) {
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return {
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row: Math.floor((WORLD_HALF - Y) / TILE_PX),
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col: Math.floor((X + WORLD_HALF) / TILE_PX),
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};
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}
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export function chunkForWorld(X, Y) {
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return {
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i: Math.floor((X - SLICE.x0) / CHUNK_SIZE),
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j: Math.floor((SLICE.y1 - Y) / CHUNK_SIZE),
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};
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}
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/** Nordwest-Ecke eines Chunks in Weltkoordinaten. */
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export function chunkOrigin(i, j) {
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return { X: SLICE.x0 + i * CHUNK_SIZE, Y: SLICE.y1 - j * CHUNK_SIZE };
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}
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