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Index › Programming Questions & Help › Other Libraries › Traer.Physics Question
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Traer.Physics Question (Read 665 times)
tschiggi
Traer.Physics Question
Feb 19th, 2008, 11:48pm  
Hello!

I have a code to create a dot matrix (6 x 7) and to draw some dot letter into the grid when pressing a key. I try to use traer.physics to make a smooth transition between the letter a and letter b. The highlighted points should move slowly in their new position. Things got complicated Wink

This is my Code so far: http://www.playground-berlin.com/fhp/raster/

Anyone knows help?

Greets
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jorgecardoso
Re: Traer.Physics Question
Reply #1 - Feb 20th, 2008, 11:48am  
So what's the problem? Smiley

I've something similar with images, you can check out my code http://jorgecardoso.org/processing/ParticleString/applet/index.html

jorge
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tschiggi
Re: Traer.Physics Question
Reply #2 - Feb 20th, 2008, 1:56pm  
Hello!

I took a look at your code and noticed, you moved the particles to their new position by "moveTo" command.

I tried to move them with some attraction to fixed particles, but they never arrive at their new position. I tried to use Springs, but i failed. Maybe i should use moveTo..

Greets
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tschiggi
Re: Traer.Physics Question
Reply #3 - Feb 20th, 2008, 2:23pm  
Ok, i tried the moveTo, is looks like this:

http://www.playground-berlin.com/fhp/raster1/
(give focus to the window and press "a" or "b")

But i think there's no need for the particle system if i simply rearrange the magenta dots?! I wanted to move them slowly and organic..

Greets
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jorgecardoso
Re: Traer.Physics Question
Reply #4 - Feb 20th, 2008, 3:01pm  
You have to use to sets of particles. One set is the desired final location. The other is the current location of dots. Each particle in one set is connected to a particle in the other set by a spring.

The moveTo is only applied to the particle in the desired final location set. They will slowly pull the other particles...

You also have to think about what happens to unused dots. One letter might have less dots than the current letter on screen, in this case some dots may: be pulled to the same location or just disappear...
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tschiggi
Re: Traer.Physics Question
Reply #5 - Feb 20th, 2008, 4:42pm  
I tried to do it like this. Two sets of particles, connected by springs. And then i used the attract command to move them to the new point. Or is it not necessary to use attraction if i use springs?

current state:

http://www.playground-berlin.com/fhp/raster2/

looks good, but you have to press each letter more then once. do you know why? Wink

Greets
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jorgecardoso
Re: Traer.Physics Question
Reply #6 - Feb 20th, 2008, 5:27pm  
tschiggi wrote on Feb 20th, 2008, 4:42pm:
looks good, but you have to press each letter more then once. do you know why Wink

Greets


You must call makeFixed() on the p2 particles when creating otherwise they will mutually attract...
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tschiggi
Re: Traer.Physics Question
Reply #7 - Feb 20th, 2008, 6:35pm  
Thanks for your help. Results look pretty much the way i wanted to have them!

Greets
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