I’m not just bored… I have an idea in mind here, but for now it’s easier just to say I wanted to figure out how to do projection mapping. So last night, I did.
First thing was to set the projector up and point it so it hits a number of angled surfaces. I put it on the sofa and pointed it at the corner of the room. The sofa was a bad idea as they aren’t the sturdiest of surfaces but I wasn’t looking for anything to permanent so it did the job. The main issue was that I couldn’t sit down to watch owt without moving the projector. Next time, I’ll put the projector on the floor. Here I’m using a highly technical tilting mechanism called book and chopsticks.
Using these measurements I modelled the scene in 3ds Max and positioned a camera where the projector is located. The orientation of the projector is a bit tricky to measure and I’m not sure what the field of view is. Rather than figure these out, I took a photo from just above the projector of the projected image and then distorted the image in Photoshop to fill a 4:3 rectangle (the projector aspect ratio). I then used this image as a viewport background and adjusted the camera FOV and target position so the scene and photo matched up… Well, close enough anyway.
The next step is to play with the usual projection mapping clichés and then do something stereoscopic.