Rect node

The Rect node is a patch for applying planar rectangle-based modifications and is commonly used to scale, align and position the image on rectangular screens (mainly LED) or to create a picture-in-picture effect by combining multiple media sources on one screen.

In a typical setup, the Rect node receives a source image as the input and outputs the modified image to the Display or Context node.

Example of the node graph with the Rect node

The image geometry and mapping modifications with the Rect node are done in the Patch Editor:

• In the Geometry Layout Area, drag the handles of the mesh control points to change the position of the four vertices to determine the scale, aspect ratio, and location of the projected image.
• In the UV Layout Area, drag the handles of the mesh control points to change the scale, aspect ratio, and placement of the mapping image.

When editing the position of control points with the Rect patch, the additional white dotted diagonal smart guide, which corresponds to the aspect ratio of the source image based on its UV coordinates, is displayed.