(version 2.0)

This addon is used to take a normal openFrameworks project and split it into 2 or more pieces that can be projected using 2 or more projectors. This usually involves something like a Matrox DualHead or a graphics card with multiple outputs. For the best results, the projectors should also have a hardware blending feature so that the overlapped portions are not brighter than the non-overlapped sections.

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• Based on Paul Bourke's paper, "Edge blending using commodity projectors"
• Quartz Shader implemenation by Matthias Oostrik ( http://www.oostrik.net )
• Original openFrameworks addon adaptation by James George
• in collaboration with FlightPhase
• additions by Marek Bereza
• This fork was created by Jeff Crouse specifically for the Interactive openFrameworks workshop at Kitchen Table Coders. It is simplified in a few minor ways.

• Flightphase's Infiniti MOI project
• Hellicar and Lewis Coke24 project
• Flightphase's University of Dayton interactive wall
• Flightphase's "Paik Times Five"

This app shows the simplest usage of the addon: a typical 2-screen horizontal layout.

For this example, get to additional addons: ofxMSAInteractiveObject [direct download link] and ofxSimpleGuiToo [direct download link].

This example shows a stupid little technique that has come in very handy for me when aligning multiple projectors. The uniform grid isn't ideal for alignment because you might be overlapping too many grid squares. With the clown, you can be sure that you are aligning properly.