[PD] visual :: fading effect + listen to an incoming audio

Mathieu Bouchard matju at sympatico.ca
Sat Aug 28 04:53:21 CEST 2004


On Thu, 26 Aug 2004, patrick wrote:

> i'm a user of gridflow, pdp and gems looking for effects like gimp layer
> mixing effect : screen, multiply burn, lighten only, overlay and others.

afaik, multiply(burn) is like:

#N canvas 0 0 450 300 10;
#X obj 30 24 inlet;
#X obj 110 24 inlet;
#X obj 30 73 @ *>>8;
#X obj 30 120 outlet;
#X connect 0 0 2 0;
#X connect 1 0 2 1;
#X connect 2 0 3 0;

and screen is like:

#N canvas 0 0 450 300 10;
#X obj 30 24 inlet;
#X obj 110 24 inlet;
#X obj 30 48 @ inv+ 255;
#X obj 110 48 @ inv+ 255;
#X obj 30 73 @ *>>8;
#X obj 30 98 @ inv+ 255;
#X obj 30 120 outlet;
#X connect 0 0 2 0;
#X connect 1 0 3 0;
#X connect 2 0 4 0;
#X connect 3 0 4 1;
#X connect 4 0 5 0;
#X connect 5 0 6 0;

and addition is like:

#N canvas 0 0 450 300 10;
#X obj 40 19 inlet;
#X obj 40 38 @ +;
#X obj 40 57 @ min 255;
#X obj 79 19 inlet;
#X obj 40 76 outlet;
#X connect 0 0 1 0;
#X connect 1 0 2 0;
#X connect 2 0 4 0;
#X connect 3 0 1 1;

and substraction is like:

#N canvas 0 0 450 300 10;
#X obj 40 19 inlet;
#X obj 79 19 inlet;
#X obj 40 76 outlet;
#X obj 40 38 @ -;
#X obj 40 57 @ max 0;
#X connect 0 0 3 0;
#X connect 1 0 3 1;
#X connect 3 0 4 0;
#X connect 4 0 2 0;

But I think that most of the remaining effects are slightly more
complex. If I'm not mistaken, quite a few of them convert to HSV and back
to RGB.

________________________________________________________________
Mathieu Bouchard                       http://artengine.ca/matju





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