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world.onPress(async({ button, entity,raycast: { voxelIndex, normal} }) => {    
if (button == Box3ButtonType.ACTION0) {//如果是action0,对应电脑端左键         
let v = voxelIndex.add(normal);//用点击到的方块坐标加上法向量，得到邻边方块位置            
if ((voxels.getVoxel(v.x, v.y, v.z)) == (voxels.name('null'))) {
        entity.position.set(v.x, v.y+2, v.z)
};         };     })