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Possible to make homography points 'stick'?

vvvv beta general
#1

Hi there,

Im using an IOBox (value advanced) to control the homography node points of a quad in the renderer. Its quite difficult to use because when you move one point in the IOBox all of the other points move also. How can I make it so the other points dont move when one point is moved?

Thanks.

#2

can you attach an example patch?

#3

yes here it is. sorry its a little messy.

To explain the patch:

its for an exhibition I am creating in February.

The dmx section is to control a moving mirror. Beaming into the mirror is a projector which is ofcourse connected to vvvv also. This way I can control the mirror and the vision with vvvv.

In the gallery space I am putting some large cubes and rectangles, and set the mirror to beam onto each one by one.

Then when the mirror stops it beams some texture. This is where I have some problem!

THe best system I can create myself is just a white quad that (with this patch) will switch from one quad to the next. This way I can morph the quads so if one quad is very small and the next quad is the size of the cube, it creates a cool effect. Or if one quad is shaped against one edge of a cube and hte next quad is placed against the other edge it ‘runs’ over the cube.

I really hope to create a system that looks like it is scanning the environment.

toomuchinfo-2.v4p (41.8 kB)

#4

hey kit, hey all,

please don’t post fullscreen patches.

#5

this video shows the mirror and projector working together (half way through video)

http://vimeo.com/2491310

#6

you are using the Homography (Transform 2d) on a render object (quad), not on the renderer’s projection transform.

for this reason you should have choosen “Original points” ranged [ -0,5000 ; 0.5000 ]( -0,5000 ; 0.5000 ) instead of [ -1 ; 1 ]( -1 ; 1 ).

i inserted a UniformScale (Transform) with Scale=“2” which does a similar effect.

btw: cleaning patches helps you understanding yourself ;)

toomuchMess.v4p (42.8 kB)

#7

thanks kalle.

is it possible to also trigger a sound file to play every time a quad switches?

#8

Change (Animation) ??

#9

Hi there,

Im using an IOBox (value advanced) to control the homography node points of a quad in the renderer. Its quite difficult to use because when you move one point in the IOBox all of the other points move also. How can I make it so the other points dont move when one point is moved?

Thanks.

I haven’t seen the patch (I’m on my mobile) but you might want to look at the timeliner node for syncing events.
Filestream is your man for making sounds happen

#10

thanks Genki

the timeliner node looks very useful for installation purposes.

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