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I try to understand spreads

vvvv beta general
#1

hi there!

59611 new post since my last log-in … it has been a while but i am still interested in VVVV.

actualy i played arround with a linear spread, just for fun. but i have a real basic problem understanding whats going on.

please have a look at the attached file and load a texture.

here ar my questions

  • am i wrong with the settings for the linear spread (input 0,2 ; width 0,5)
  • why did i insert the devide node?
  • why shows the GDI-renderer a mirrored image?

i think there must be a much simpler way to patch this.

with the large slider on the bottom of my patch, i tried to create some thing like an auto adjust of the lightness.

thanks for your help,
nic

test_spread.v4p (15.6 kB)

#2

The Pipet (EX9.Texture) node uses a special coordinate system with (0,0) at its top left and (1,1) at the lower left (like in home computers).

usually in vvvv (0,0) is at the center, (1,1) at the upper right and (-1,-1) in the lower left (like in mathematics)

i usually use a module which internally maps the pipet coordinate system to the default coordinate system.

Pipet (EX9.Texture Simple).v4p (4.2 kB)

#3

here ar my questions

  • am i wrong with the settings for the linear spread (input 0,2 ; width 0,5)
  • why did i insert the devide node?
  • why shows the GDI-renderer a mirrored image?

1 Yes, just use 0,5 as input and 1 as width, so you get everything form 0 to 1.

2 Because you made a weird linear spread ;)

3 I am patching you something, but Oschatz explained it (weird pipet coordinate system!!)

Mirror.v4p (16.5 kB)

#4

thanks for the fast response and your files!

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