Matrix Multi bug?

Scratchpole's picture

Right I'm playing around with 3d projection mapping techniques again.... When I put an object inside a GL Matrix Multi and I try to use shadows on the lighting patch I get two copies of the object. I guess this is a bug. Same problem in 10.6 and 10.8.

I'm also trying out _1024 bounding box. Attempting to use a cube as my input for the bounding object(Binder?), but I guess it is called a box for a reason... Franz is it just 2d? Has anyone built any other examples with it they would like to share?

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Scratchpole's picture
Re: Matrix Multi bug?

Err the 2d question probably is a bit daft...I can see it is outputting an xyz structure. It's just that it lost the z at some point in my noodling.

franz's picture
Re: Matrix Multi bug?

Shadows will break if you try to fiddle the matrix.

Scratchpole's picture
Re: Matrix Multi bug?

Yes I noticed. The limits of this bloody tool, grrrrrrr!

Please can you tell me more about how the bounding box is meant to work? I am having issues with scale between my 3d object and the binding. What I would like to achieve is an interactive/editable box/matrix so I can distort an object within. I would like shadows to work.

franz's picture
Re: Matrix Multi bug?

The bounding box patch is meant to calculate the bounding box of a bunch of XYZ_points. It processes the minimum/maximum values in each dimension. I needed this patch to verify if my particles were constrained within a defined volume. I don't think it will help you in your scenario...