One video on 3d object?

vvvv beta general
1

hi again.
must be once again a classic, but keyword searching didn t gave me any satisfaying clue…

I would like to put the same video on a group of quads in 3d space, but just one image being projected to the inner sides of this cube.

I dont know if I need first to split my filestream and then texture it to the 5 surfaces I want, or if I only need to do a sort of CG with the 5 quads …

I would rather go on first solution, as I need to cheat the deformation on my real box in real life…

any link help … will be gracefully received ;-P

2

I would like to put the same video on a group of quads in 3d space, but just one image being projected to the inner sides of this cube.

group of quads - okay. but which cube are you talking about? could you describe your scenario in greater detail, please?

3

hi dikki, I m making a projection on a dancer who is inside a sort of cube ( 2 side, one face , one roof ).

my video will be diffused and things ( images ) will move on the 4 faces ( ceilling, 2 sides, front face). they will travel from face to face

so i need to compense distorsion.
i was thinking of grouping quad, but i m not sure at all.
a quad using trapeze and size enables me to compense optic troubles and distorsions…

I buy ANY good advice; sure its a classic one ;-P

cheers, chris

4

hmm, maybe a look at the {CODE(ln=>0)}\girlpower( slide projector )^ folder in your VVVV directory is helpful … the ProjectedTexture shader could be the solution.

on the other hand, i might still misunderstand your problem. couldn’t you just use your videos as textures on multiple quads that are placed in your 3D scene just like their real-world counterparts, with the virtual camera occupying the same spot as the beamer you are using?

5

i m maybe not clear ;-P .
one video, projected on a 3d object, made of 3 quads (roof, front, 2sides) .
The video has to be blended and distorsed in different manner on the 4 walls/quads to compense the deformation, but its ONE source.
Not 4 separated sources…
( ah ah)

6

There are at least 2 ways to do skewed 3d projections on real 3d surfaces.

  1. apply a video texture to a quad and distort the 4 corners of the quad until you have pinned it to each side of the real surface.

2.Measure and recreate your real space into 3D space then put a virtual projector into the 3D space.

Have you found a solution for compensating for distortion?

Once you have compensated for the distortion - the filestream should be easy.

7

virtual projector is surely where i was²missing something ! thanxxx