Mesh in Unity
This section describes the mesh you need to know to deform your sprites.
- Mesh is a polygon that the Unity makes the image deformation.
- When you open the PSB through the
sprite editor, the Unity2D system will create the polygons automatically.
Mesh will be created automatically by clinking 'Opne Sprite editior'
- Like a human body, we need to add bones to the image.
- With skeletal animation, you can make all the animations from a single sprite.
- When the polygon is defined inside the image, then its vertices can be manipulated to deform the image with the Unity Bone system.
1. To create a mesh, you might need to select a
PSB in your project, when you see the inspector tab. Clicking the sprite editor button will show the sprite editor popup window.
2. Once you get the popup window, you will need to change the
Sprite Editor to the Skinning editor.
3. You will see the auto-generated mesh when you tap the
Auto Geometry button. You can also Re-Generate the mesh if you don’t like it. In the options menu, you could choose the detail of the outline, alpha tolerance and subdivide. The options could be different for each image.
4. Because of the performance, we recommend you manually adjust all the mashes as much as possible.
For example, you might need to clean up the useless vertexes. This will helps you set the bone much easier. You can add or delete the vertexes through the
Create Vertex button.
Process of adjusting vertexes
(Left) Automatic generated mesh , (Right) Manually adjusted mesh
5. How to add bone?
Once you have finished your mesh, the next stage is adding bones. Click and drag to create the first bone, following your design.
Furthermore, if you want to adjust the Weights, click the
Auto weights button.
Automatically applied weights
A sprite that moves along a bone with a weight applied
6. Always, you will need to adjust weights for the vertex. It’s up to you but remember, no pain no gain 🙂. There are two more useful tools that you can use for adjusting.
- The
Weight Sliderwill help you if you want to set the value accuracy. Weight Brushwould be great if you don’t want to spend much time doing the rigging.