What is part swap and when should I use it?

什么是部件替换，何时使用？

Last updated: 2026-10-21

What is part swap and when should you use it?

什么是部件替换，何时使用？

Part swap is an action unit field in the Action Group (AG) that switches a target part to another numbered state at a set frame, so one part can change appearance mid-animation without extra parts.

部件替换是动作组（AG）中的动作单元字段，在指定帧把目标部件切换到另一个编号状态，让同一部件在动画中改变外观，无需额外部件。

How to do it in 3SAX V3

在 3SAX V3 中如何操作

1. Open the SG panel and upload your PNG parts; set Part ID, Parent ID, baseX/baseY, Anchor, Scale, Layer, and category (join) with numbered states.

1. 打开 SG 面板上传 PNG 部件；设置 Part ID、Parent ID、baseX/baseY、锚点、缩放、图层，以及类别（join）和编号状态。

2. Open the AG panel and bind the matching Material Group.

2. 打开 AG 面板并绑定对应的素材组。

3. Add an action unit; set the target part (join) and seq range (e.g. 01:0-5).

3. 添加动作单元；设置目标部件（join）和 seq 帧范围（如 01:0-5）。

4. Enable swap part and pick the destination state; use auto-suggest sequence to match the part's available states.

4. 启用部件替换并选择目标状态；用自动建议序列匹配该部件可用状态。

5. Optionally add a trigger event or chain it in the AC scheduler (AC+MUS pairs).

5. 可选：添加触发事件，或在 AC 调度器中链式连接（AC+MUS 配对）。

6. Check the CANVAS preview; drag to fine-tune dx/dy and confirm rot/scale sync back into codes.

6. 在 CANVAS 预览检查；拖动微调 dx/dy，确认 rot/缩放同步回代码。

7. Validate the project, then render to MP4 (720x1280 or 1280x720).

7. 校验项目，然后渲染 MP4（720x1280 或 1280x720）。

What you CAN and CANNOT do

能做与不能做

CAN: switch numbered states of one part at a chosen frame; bind to skeleton joints in BONE so attached parts move with it; save the action to LIBRARY and reload it in one click.
CANNOT: swap to a state that does not exist on the part, or swap parts not in the bound Material Group.
Wrong setup result: the seq range fails validation (red hint), the part stays on its old frame in CANVAS, or the render is blocked by the whole-project error list.

能做：在指定帧切换某个部件的编号状态；在 BONE 绑定骨骼关节，让附属部件一起运动；把动作存入 LIBRARY 并一键加载。
不能做：切换到该部件不存在的状态，或替换不属于已绑定素材组的部件。
设置错误时：seq 范围校验失败（红色提示），CANVAS 中部件停留在旧帧，或渲染被整项目错误列表拦截。

Try part swap in the 3SAX V3 creator tool.

在 3SAX V3 创作工具中试试部件替换。