zero point nine

My general goal for this was to approximate the look of a video projection hitting a ‘non-planar surface’ or otherwise intersecting objects in a 3d scene.

The underlying logic wasn’t too painful. The UV coordinates of each vertex are all that need to be solved for. There’s a linear relationship between the position and orientation of the ‘projector’, and the world space position and UV coordinates of each vertex in the scene — requiring just algebra, which is nice, because that’s about all the math I know. JiglibFlash is being used for the physics action.

In its current implementation, the projector is limited to looking straight down the z-axis. I have a feeling that the most elegant approach for all this would be to extend Camera3D or to piggyback on top of the plumbing of the Papervision framework in some other way (hint, hint)(apologies for the mixed metaphor). Should I develop the ‘Projection Manager’ to handle arbitrary projector orientation, I’ll post the source along with an updated example.

This entry was posted on Tuesday, May 26th, 2009 at 7:25 pm and is filed under flash, papervision3d. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.