Wall Projection¶

This tutorial explains how to configure SPARCK for a wall projection with one projector, and using the CornerPin node.

Download the project files here: Wall_Projection.zip

Setup with 1 projector¶

In your Max patch, add SPARCK. See Getting Started for more information.

SPARCK for this setup

The image below shows the overall Max subpatcher p Workspace, which contains all the SPARCK nodes required for this configuration.

Wall projection SPARCK setup

CornerPin desktop preview

Nodes Configuration¶

The following text explains and shows how to correctly setup all the different nodes for a wall projection setup.

Window Node¶

This node outputs the rendered result of SPARCK to an output display — in this case, one projector.

Window node, available under 2_OUTPUT > WINDOW.maxpat

position: Switch between Output or Desktop. Output displays visual content on the configured projectors, while Desktop creates a preview window.

columns and rows: Slices the Window into designated frames. In this case both the columns and rows are set to 1.

display: Press setting... to open the display setup tool and configure the total pixel area used for projection. Select the display(s) you want to use. Selected displays appear orange. Click Store and Close when done.

Setting interface to select and configure the display(s) used for projection.

In this example, the computer is connected to two monitors (1920×1080 and 2560×1800, grayed out) and one projector (3840×2160, orange). Only the orange display is used for projection.

Viewport Node¶

The Viewport node creates a texture that is sent to the Window.

Viewport node. Available under 01_UTILITY > VIEWPORT.maxpat

window: References the Window node.

slice: Selects the designated slice where the content will be displayed — here, column 1 and row 1.

mesh: Set to none so that no mesh is applied, as the CornerPin node handles the mapping.

CornerPin Node¶

The CornerPin node provides controls to map textures to the output window by freely repositioning the image corners.

CornerPin node, available under 04_MAPPING > CORNERPIN.maxpat

edit...: Opens the CornerPin editor. A pop-up window appears, allowing you to adjust the four corners to match the projection surface.

CornerPin edit interface

reset...: Resets the CornerPin configuration.

viewport: Targets the Viewport where the CornerPin is rendered.

SpoutReceiver Node¶

The SpoutReceiver node receives textures from Spout. These are typically real‑time animated textures generated by visual engines such as TouchDesigner, Unity, Unreal, or Notch.

SpoutReceiver node, available under 1_INPUT > SPOUT.RECEIVER.maxpat

sender: Select the Spout video stream.

flip x: Flip the incoming texture horizontally.

flip y: Flip the incoming texture vertically.