Body Brush

note

This feature may continue to render objects outside the camera view in version 4.11. A fix will be included in a future release.

The Body Brush object enhances the AR drawing tool by allowing you to interact through your fingertips using the camera. Unlike the AR Brush, which requires screen contact, the Body Brush tracks your fingertips in real-time, offering more ways to draw. Fully customizable, it allows you to adjust the texture and brush color for personalized creative control in augmented reality.

Add the Body Brush Object

To add a Body Brush object:

1. Go to the Hierarchy panel
2. Click + Add object
3. Go to AR Tracking
4. Select Body Brush

How Body Brush Works

• Start and Stop Drawing with Pinch Gestures: You can easily control the start and stop of your drawing with simple pinch gestures.

  • Start Drawing: Pinch your thumb and index finger together to begin drawing
  • Stop Drawing: Release your fingers, un-pinch, or move your hands away from the camera to stop the drawing

• Continuous Drawing with Pinch Point: Once you've started drawing, the process continues smoothly with the pinch point gesture.

  • Drawing Angle: The brush mesh stays perpendicular to the screen and adjusts its angle as the screen rotates
  • Draw Trajectory: The brush mesh is drawn in real-time, responding to the movement of points in space

Customize Body Brush in Visual Scripting

When you add a Body Brush object, it automatically creates an AR Body Brush node in the Visual Scripting panel. You can further customize the AR Body Brush node, including size, brush color, texture, and more.

Name	Data Type	Description
Size	Number	Determines the size of the entire mesh
Interval	Number	Determines the spacing between
Enable Bloom	Boolean	Enables the bloom property
Draw Mode	String	Controls the draw mode: Single Color: Enables a single color to display Rainbow Brush: Enables a rainbox of colors to display Custom Texture: Enables a custom texture with brush texture as a property
Brush Color	Color	The HEX color of the brush displayed on the screen
Texture	Texture2D	The texture of the brush component.
Camera	Component	Determines which camera object is used
Start Mesh	Mesh	Adds the starting mesh from the Assets panel to a scene object
Main Mesh	Mesh	Adds the main mesh from the Assets panel to a scene object
End Mesh	Mesh	Adds the ending mesh from the Assets panel to a scene object

Components

The Body Brush object is made up of the following components, found in the Inspector panel:

• Transform
• Camera