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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| import { calculateDistance, HexPosition, Position } from "@bibliothecadao/eternum"; | ||
| import * as THREE from "three"; | ||
| import { HEX_SIZE } from "./scenes/constants"; | ||
|
|
||
| export const getHexagonCoordinates = ( | ||
| instancedMesh: THREE.InstancedMesh, | ||
| instanceId: number, | ||
| ): { hexCoords: HexPosition; position: THREE.Vector3 } => { | ||
| const matrix = new THREE.Matrix4(); | ||
| instancedMesh.getMatrixAt(instanceId, matrix); | ||
| const position = new THREE.Vector3(); | ||
| matrix.decompose(position, new THREE.Quaternion(), new THREE.Vector3()); | ||
|
|
||
| const hexCoords = getHexForWorldPosition(position); | ||
|
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| return { hexCoords, position }; | ||
| }; | ||
|
|
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| export const getWorldPositionForHex = (hexCoords: HexPosition, flat: boolean = true) => { | ||
| const hexRadius = HEX_SIZE; | ||
| const hexHeight = hexRadius * 2; | ||
| const hexWidth = Math.sqrt(3) * hexRadius; | ||
| const vertDist = hexHeight * 0.75; | ||
| const horizDist = hexWidth; | ||
|
|
||
| const col = hexCoords.col; | ||
| const row = hexCoords.row; | ||
| const rowOffset = ((row % 2) * Math.sign(row) * horizDist) / 2; | ||
| const x = col * horizDist - rowOffset; | ||
| const z = row * vertDist; | ||
| const y = flat ? 0 : pseudoRandom(x, z) * 2; | ||
| return new THREE.Vector3(x, y, z); | ||
| }; | ||
|
|
||
| export const getHexForWorldPosition = (worldPosition: { x: number; y: number; z: number }): HexPosition => { | ||
| const hexRadius = HEX_SIZE; | ||
| const hexHeight = hexRadius * 2; | ||
| const hexWidth = Math.sqrt(3) * hexRadius; | ||
| const vertDist = hexHeight * 0.75; | ||
| const horizDist = hexWidth; | ||
|
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||
| const row = Math.round(worldPosition.z / vertDist); | ||
| // hexception offsets hack | ||
| const rowOffset = ((row % 2) * Math.sign(row) * horizDist) / 2; | ||
| const col = Math.round((worldPosition.x + rowOffset) / horizDist); | ||
|
|
||
| return { | ||
| col, | ||
| row, | ||
| }; | ||
| }; | ||
|
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| export const calculateDistanceInHexes = (start: Position, destination: Position): number | undefined => { | ||
| const distance = calculateDistance(start, destination); | ||
| if (distance) { | ||
| return Math.round(distance / HEX_SIZE / 2); | ||
| } | ||
| return undefined; | ||
| }; | ||
|
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| export const calculateOffset = (index: number, total: number, radius: number) => { | ||
| if (total === 1) return { x: 0, y: 0 }; | ||
|
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| const angleIncrement = (2 * Math.PI) / 6; // Maximum 6 points on the circumference for the first layer | ||
| let angle = angleIncrement * (index % 6); | ||
| let offsetRadius = radius; | ||
|
|
||
| if (index >= 6) { | ||
| // Adjustments for more than 6 armies, placing them in another layer | ||
| offsetRadius += 0.5; // Increase radius for each new layer | ||
| angle += angleIncrement / 2; // Offset angle to interleave with previous layer | ||
| } | ||
|
|
||
| return { | ||
| x: offsetRadius * Math.cos(angle), | ||
| z: offsetRadius * Math.sin(angle), | ||
| }; | ||
| }; | ||
|
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||
| const pseudoRandom = (x: number, y: number) => { | ||
| const n = Math.sin(x * 12.9898 + y * 78.233) * 43758.5453123; | ||
| return n - Math.floor(n); | ||
| }; |
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