js/source/scene/Tree.js - master - RaskolnickOFF/3D

js/source/scene/Tree.js
60 строк2 KB
RaskolnickOFF
Structure update
06 июн 2026, 03:18
06 июн 2026, 03:189bc1c25
// js/source/scene/Tree.js

import * as THREE from 'three';

// Кэш материалов: ключ "цвет|roughness" → материал
const _materialCache = new Map();

function getMaterial(color, roughness) {
    const key = `${color}|${roughness}`;
    if (!_materialCache.has(key)) {
        _materialCache.set(key, new THREE.MeshStandardMaterial({ color, roughness }));
    }
    return _materialCache.get(key);
}

/**
 * @param {string} type — ключ в treesConfig ("pine", "oak", ...)
 * @param {Object} treesConfig — весь объект settings.trees
 * @returns {THREE.Group | null}
 */
export function createTreeMesh(type, treesConfig) {
    const cfg = treesConfig?.[type];
    if (!cfg) {
        console.warn(`createTreeMesh: тип дерева "${type}" не найден в treesConfig`);
        return null;
    }

    const trunkMaterial = getMaterial(cfg.trunkColor, cfg.trunkRoughness);
    const leavesMaterial = getMaterial(cfg.leavesColor, cfg.leavesRoughness);

    const group = new THREE.Group();
    group.name = `tree_${type}`;

    // Ствол
    const trunkGeo = new THREE.CylinderGeometry(
        cfg.trunkRadius * 0.8,
        cfg.trunkRadius,
        cfg.trunkHeight,
        cfg.radialSegments
    );
    const trunkMesh = new THREE.Mesh(trunkGeo, trunkMaterial);
    trunkMesh.name = 'trunk';
    trunkMesh.position.y = cfg.trunkHeight / 2;
    trunkMesh.castShadow = true;
    trunkMesh.receiveShadow = true;
    group.add(trunkMesh);

    // Ярусы
    for (const tier of cfg.tiers) {
        const coneGeo = new THREE.CylinderGeometry(0, tier.radius, tier.height, cfg.radialSegments);
        const coneMesh = new THREE.Mesh(coneGeo, leavesMaterial);
        coneMesh.name = 'leaves';
        coneMesh.position.y = tier.y;
        coneMesh.castShadow = true;
        coneMesh.receiveShadow = true;
        group.add(coneMesh);
    }

    return group;
}