Unity换装系统
引言
之前的项目需要实现人物的换装系统，网上目前的教程大部分都是骨骼点替换+Mesh合并的方案，代码也相对老旧。这里记录一下自己写的仅基于骨骼点替换的换装系统。
这里先简单讲一下两个换装系统用到的技术（仅为个人理解）
- 骨骼点(Skeleton): 骨骼点就是附在模型上的Transform point，通过改动骨骼点的position，rotation或者scale可以对其对应的蒙皮进行位移，旋转或者缩放
- 蒙皮（Skinned Mesh): 和骨骼点绑定的mesh。
所以换装系统需要一个具有骨骼点绑定模型，并且可以更换的服装也和主体模型有一样的骨骼点。接着进行骨骼点替换，把服装的骨骼点替换程主体模型的骨骼点。这样Unity在播放主体模型的动画时（实际就是对主体模型的骨骼点进行transform），服装也会跟着一起动，这就完成了简单的换装。
实现
->完整项目<-
SkinnedMeshHelper.cs
这个class主要就是按照我在引言中提到的思路进行骨骼点查找，然后返回一个新的骨骼点array供替换。
using System.Linq;
using UnityEngine;
public static class SkinnedMeshHelper
{
public static Transform[] GetNewBones(SkinnedMeshRenderer root, SkinnedMeshRenderer source)
{
return root.bones
.Where(x => source.bones.Select(s => s.name).Contains(x.name)).ToArray();
}
}
Outfit.cs
这个class放在服装的prefab上，设定好OutfitType（Hair,Cloth,Pant,Shoes）后放在Resources/Outfit/{OutfitType}/下。文件名和Id保持一致。
using UnityEngine;
public class Outfit : MonoBehaviour
{
[SerializeField] private OutfitType outfitType;
private SkinnedMeshRenderer skinnedMeshRenderer;
public OutfitType OutfitType { get => outfitType; set => outfitType = value; }
public int Id { get => int.Parse(this.name); }
public SkinnedMeshRenderer SkinnedMeshRenderer
{
get
{
if (skinnedMeshRenderer == null)
{
skinnedMeshRenderer = this.GetComponentInChildren<SkinnedMeshRenderer>();
}
return skinnedMeshRenderer;
}
}
}
public enum OutfitType
{
Hair,
Cloth,
Pant,
Shoes
}
EquipmentManager.cs
这个类用于换装前端逻辑，使用前先在人物身上放4个Slot，分别对应头，身，腿和脚。
using UnityEngine;
public class EquipmentManager : MonoBehaviour
{
[SerializeField] private Transform hairSlot;
[SerializeField] private Transform clothSlot;
[SerializeField] private Transform pantSlot;
[SerializeField] private Transform shoesSlot;
[SerializeField] private SkinnedMeshRenderer avatarSkinnedMesh;
public Transform HairSlot { get => hairSlot; }
public Transform ClothSlot { get => clothSlot; }
public Transform PantSlot { get => pantSlot; }
public Transform ShoesSlot { get => shoesSlot; }
public int HairId { get; set; }
public int ClothId { get; set; }
public int PantId { get; set; }
public int ShoesId { get; set; }
public void LoadEquipment()
{
ChangeOutfit(OutfitType.Hair, 1);
ChangeOutfit(OutfitType.Cloth, 1);
ChangeOutfit(OutfitType.Pant, 1);
ChangeOutfit(OutfitType.Shoes, 1);
}
public void ChangeOutfit(OutfitType outfitType, int outfitId)
{
GameObject outfit = null;
Transform target = null;
switch (outfitType)
{
case OutfitType.Hair:
outfit = Resources.Load<GameObject>($"Outfit/Hair/{outfitId}");
target = hairSlot;
if (hairSlot.childCount > 0)
{
Destroy(hairSlot.GetChild(0).gameObject);
}
HairId = outfitId;
break;
case OutfitType.Cloth:
outfit = Resources.Load<GameObject>($"Outfit/Clothes/{outfitId}");
target = clothSlot;
if (clothSlot.childCount > 0)
{
Destroy(clothSlot.GetChild(0).gameObject);
}
ClothId = outfitId;
break;
case OutfitType.Pant:
outfit = Resources.Load<GameObject>($"Outfit/Pants/{outfitId}");
target = pantSlot;
if (pantSlot.childCount > 0)
{
Destroy(pantSlot.GetChild(0).gameObject);
}
PantId = outfitId;
break;
case OutfitType.Shoes:
outfit = Resources.Load<GameObject>($"Outfit/Shoes/{outfitId}");
target = shoesSlot;
if (shoesSlot.childCount > 0)
{
Destroy(shoesSlot.GetChild(0).gameObject);
}
ShoesId = outfitId;
break;
}
var outfitObj = Instantiate(outfit, target);
var smr = outfitObj.GetComponent<Outfit>().SkinnedMeshRenderer;
var bones = SkinnedMeshHelper.GetNewBones(avatarSkinnedMesh, smr);
smr.bones = bones;
}
}
ChangeOutfitController.cs
换装演示场景的UI控制逻辑。
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public class ChangeOutfitController : MonoBehaviour
{
[SerializeField] private Button prevHair;
[SerializeField] private Button nextHair;
[SerializeField] private Button prevCloth;
[SerializeField] private Button nextCloth;
[SerializeField] private Button prevPant;
[SerializeField] private Button nextPant;
[SerializeField] private Button prevShoes;
[SerializeField] private Button nextShoes;
[SerializeField] private EquipmentManager equipmentMgr;
private int currClothIndex = 1;
private int currHairIndex = 1;
private int currPantIndex = 1;
private int currShoesIndex = 1;
// Start is called before the first frame update
void Start()
{
equipmentMgr.LoadEquipment();
prevHair.onClick.AddListener(() => { ChangeOutfit(OutfitType.Hair, false); });
nextHair.onClick.AddListener(() => { ChangeOutfit(OutfitType.Hair, true); });
prevCloth.onClick.AddListener(() => { ChangeOutfit(OutfitType.Cloth, false); });
nextCloth.onClick.AddListener(() => { ChangeOutfit(OutfitType.Cloth, true); });
prevPant.onClick.AddListener(() => { ChangeOutfit(OutfitType.Pant, false); });
nextPant.onClick.AddListener(() => { ChangeOutfit(OutfitType.Pant, true); });
prevShoes.onClick.AddListener(() => { ChangeOutfit(OutfitType.Shoes, false); });
nextShoes.onClick.AddListener(() => { ChangeOutfit(OutfitType.Shoes, true); });
}
private void ChangeOutfit(OutfitType outfitType, bool isNext)
{
switch (outfitType)
{
case OutfitType.Hair:
if (isNext)
{
currHairIndex = currHairIndex < 5 ? ++currHairIndex : 1;
}
else
{
currHairIndex = currHairIndex > 1 ? --currHairIndex : 5;
}
equipmentMgr.ChangeOutfit(outfitType, currHairIndex);
break;
case OutfitType.Cloth:
if (isNext)
{
currClothIndex = currClothIndex < 5 ? ++currClothIndex : 1;
}
else
{
currClothIndex = currClothIndex > 1 ? --currClothIndex : 5;
}
equipmentMgr.ChangeOutfit(outfitType, currClothIndex);
break;
case OutfitType.Pant:
if (isNext)
{
currPantIndex = currPantIndex < 5 ? ++currPantIndex : 1;
}
else
{
currPantIndex = currPantIndex > 1 ? --currPantIndex : 5;
}
equipmentMgr.ChangeOutfit(outfitType, currPantIndex);
break;
case OutfitType.Shoes:
if (isNext)
{
currShoesIndex = currShoesIndex < 5 ? ++currShoesIndex : 1;
}
else
{
currShoesIndex = currShoesIndex > 1 ? --currShoesIndex : 5;
}
equipmentMgr.ChangeOutfit(outfitType, currShoesIndex);
break;
}
}
}
许可声明
请勿使用美术素材在任何形式的作品中，谢谢。
