Mapping! Quad -> Box (ODE) help!

vvvv beta question
1

Hi everybody! I’m working on some mapping, trying to use some ODE stuff…

I’m mapping some squares on the wall, so I have the coordinates in 2D. Then I use HOMOGRAPHY to convert this coordinates in a Transformation for a Quad.
The quad mach perfectly the square on the wall.

then I convert the Transformation with Decompose node, and use the 3 vectors to modify a BOX. More or less the BOX is in the same place and with the same orientation, but there are no distorsion!
http://i54.tinypic.com/2mo8too.jpg

What I’m missing?
nic

2

perspective…

3

Ok, thanks! :D

But the problem is that not all the squares have the same prespective distorsion!
Try to formulate better my question: it is possible apply some distorsion at a BOX object? And it is possible to aplly this distorsion to a BOX(ODE) object?

4

yes, but why don’t you apply homo to viewport??

5

Because, in the real use I have many quad, so many homo. So I don’t know which homo apply to the viewport…
http://img402.imageshack.us/img402/58/manyj.jpg

BTW, since I need this BOX just to make some collision with balls, I solved by putting a thin Box for each side of the quad:
http://img577.imageshack.us/img577/7584/solutionr.jpg

not very elegant, but it works. BTW, I’m still looking for a better solution :D
nic

6

well looks quite clean ;] specially if it works…
don’t have too much exp with box2d to say what can be done, but i think you have proper idea, might stallone part can be cleaned, but for your idea don’t know any better solution…

7

hi nic,

well,
can’t see the stallone settings from the screenshot.
always good to attach the patch.

i can imagine that your patch can be improved by using SwapDim (Spreads).

just my 0.02€…

8

see also SwapDim (Spreads Advanced)
:)