Hotspot Texturing¶

Introduction¶

Hotspot Texturing is a new feature added to the toolkit that makes UV unwrapping easier and faster. When you define UV layouts using the hotspot layout editor, UVs of each polygon can be placed according to the predefined layouts automatically.

We’ve recorded Getting Started Tutorial video. Click Here.

Features¶

Built-in Hotspot Layout Editor made from the UV Editor framework.
A triangle layout as well as a rectangle is supported
Auto mode called Auto Hotspot which enables UVs to be applied automatically every time a polygon is modified.
Padding parameter to gives consistant gap between a hotspot layout and assigned UVs
Applies a selected hotspot layout to UVs by clicking on Apply Selected Hotspot button.

Hotspot Layout tool¶

_images/Hotspot_Texturing_tool_location.jpg — `Hotspot Layout` tool¶

Hotspot Layout tool is for hotspot texturing. It is located in the Surface group.

_images/hotspottexturing_properties_window.png — `Hotspot Layout` tool properties¶

1.Select Only Visible: If on, only visible polygons can be selected in the scene view.
2.Auto Hotspot: If on, hotspot texturing is applied immediately to every polygon which is being edited at realtime.
3.Hotspot Group: If on, adjacent polygons are placed in one layout.
4.Hotspot Padding: If enabled, UVs are away by this pixel value from the layout

Hotspot Padding parameter¶

5.Hotspot Scale

The ratio of the hotspot layout to the size of the polygon in the world.

In case of 1, the size of 1.0 in the hotspot layout and 1.0 in the world is the same.

In case of 2, 0.5 of the hotspot layout will be equal to the 1.0 size in the world.

For example, when the texture and hotspot layout are configured as above, and the world size is set to 1.0, 0.5, 0.25, 0.125, respectively, and a cube is created.

You can see the UVs are placed differently depending on the hotspot scale value. If the hotspot scale is 1, you can see that a 1.0-sized cube is placed in the UVs according to the 1.0-sized layout.

Since the 0.5-size cube is also 1/2 of 1.0 to fit the size, the UVs have been placed according to the 1/2-size layout in the hotspot layout editor.

If the hotspot scale is 2, a layout of 1/2 size is applied to a cube of 1.0 size, and accordingly, you can see that UV is placed on other sized models as well.

6.Hotspot Layout: Hotspot layout file. The format is .asset. This layout file can be applied to several objects.
7.New Hotspot Layout/Open Layout Editor: If a hotspot layout file isn’t set, New Hotspot Layout button is enabled so that you can create a new layout file. If a hotspot layout file is set, UV Layout Editor will be opened.
8.Apply Hotspot: If enabled, the hotspot texturing will be applied to the selected polygons. The selected polygons’ UV coordinates will be placed in the most appropriate layout.
9.Apply Selected Hotspot: If enabled, the selected polygons’ UV coordinates will be placed in the selected hotspot layout.

Hotspot Layout Editor¶

Defines layouts for hotspot texturing. The usage is somewhat similar to UV Editor.

1.Move: Moves the selected layout polygon or UV
2.Rectangle: Resizes the selected layout polygon or UV using Rectangle gizmo.
3.UV Tool: Selects each UV and transform it using gizmos.
4.Polygon Tool: Selects each layout polygon and transform it using gizmos.
5.Texture Slot: Opens a texture displayed in the editor. This texture is just a guide.
6.Open Active Hotspot Layout: Opens a hotspot layout file of the current object.
7.Hotspot Layout Slot: Hotspot layout file (.asset).
8.Grid Snap: Grid snap size list.
9.Rectangle Tool: You can use this to make a rectangle layout.
10.Right Angled Triangle Tool: You can use this to make a right angled triangle layout.
11.Icosceles Angled Triangle Tool: You can use this to make an icosceles angled triangle layout.
12.Delete Tool: You can remove the selected layout. The shortcut is Del key.
13.Rotate Pos90 Tool: Rotates the selected layout by positive 90 degrees.
14.Rotate Neg90 Tool: Rotates the selected layout by negative 90 degrees.
15.Flip Horizontal Tool: Flips the selected layout horizontally.
16.Flip Vertical Tool: Flips the selected layout vertically.

How to Use¶

Using `Auto Hotspot`¶

At first you should select a UModeler mesh or create it.
Enter Hotspot Layout tool
You should create a new Hotspot layout file by pressing New Hotspot Layout or open the existing layout file via Hotspot Layout slot.
Now click on Open Layout Editor to open the Layout Editor