// Babylon.js 形态键适配器
class BabylonMorphTargetAdapter {
    constructor() {
        this.morphTargetCache = {};
    }

    buildCache(meshes) {
        this.morphTargetCache = {};
        this.meshes = meshes;
        let totalTargets = 0;

        meshes.forEach(mesh => {
            const mtm = mesh.morphTargetManager;
            if (!mtm) return;


            for (let i = 0; i < mtm.numTargets; i++) {
                const mt = mtm.getTarget(i);
                if (!mt?.name) continue;

                const lowerName = mt.name.toLowerCase();

                if (!this.morphTargetCache[lowerName]) {
                    this.morphTargetCache[lowerName] = [];
                }
                this.morphTargetCache[lowerName].push(mt);
                totalTargets++;
            }
        });

        return totalTargets;
    }

    setInfluence(name, value) {
        const lowerName = name.toLowerCase();
        const targets = this.morphTargetCache[lowerName];

        if (targets?.length) {
            targets.forEach(mt => {
                mt.influence = value;
            });
        }
    }

    getInfluence(name) {
        const lowerName = name.toLowerCase();
        const targets = this.morphTargetCache[lowerName];

        if (targets?.length) {
            return targets[0].influence;
        }
        return 0;
    }

    resetAll() {
        for (const targets of Object.values(this.morphTargetCache)) {
            targets.forEach(mt => {
                mt.influence = 0;
            });
        }
    }

    getCacheSize() {
        return Object.keys(this.morphTargetCache).length;
    }
}

// 导出到全局
if (typeof window !== 'undefined') {
    window.BabylonMorphTargetAdapter = BabylonMorphTargetAdapter;
}