Processing 1.0 - Processing Discourse - traer physics attractor problem

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Index › Programming Questions & Help › Other Libraries › traer physics attractor problem

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traer physics attractor problem (Read 1287 times)

DasAutomat

traer physics attractor problem
Nov 6^th, 2006, 1:21am

i made one attractor which is using the mouse-coordinates.
it attracts the other particles, but then sends them bouncing around like mad.
whenever i use setMinimumDistance the attractor stops attracting. i basically want the "puppet" to be attracted by the mouse and then hang there.

some spaghetti code for your amusement here:

//...............

import processing.core.PApplet;
import traer.physics.*;
import sms.*;

public class Puppet_traer extends PApplet {

ParticleSystem physics;

Particle p;

Particle anchor;

Particle head;

Particle body;

Particle arm_l;
Particle arm_r;

Particle foot_l;
Particle foot_r;

Spring[] s;
Attraction[] a;

Particle sideTractor;

int[] vals = Unimotion.getSMSArray();

int STRINGSIZE = 15;
int BALLSIZE = 4;

//make balls with more drag which are attached to the main ball

public void setup() {
size(1200, 800);
smooth();
fill(0);
frameRate(24);
ellipseMode(CENTER);

physics = new ParticleSystem(5.0f, 0.1f);

// sideTractor = physics.makeParticle(6.0f, vals[0],vals[1], 0);
sideTractor = physics.makeParticle();
sideTractor.makeFixed();

head = physics.makeParticle(3.0f, width / 2, height/2, 0);
//head.makeFixed();

anchor = physics.makeParticle(1.0f, width / 2, 0, 0);
anchor.makeFixed();

arm_l = physics.makeParticle(1.0f, width / 2, height/2, 0);
arm_r = physics.makeParticle(1.2f, width / 2, height/2, 0);

foot_l = physics.makeParticle(2.0f, width / 2, height/2, 0);
foot_r = physics.makeParticle(2.2f, width / 2, height/2, 0);

body = physics.makeParticle(5.0f, width / 2, 0, 0);

s = new Spring[6];
s[0] = physics.makeSpring(anchor, head, 1.0f, 0.1f, 10*STRINGSIZE);
s[1] = physics.makeSpring(body, head, 1.0f, 0.1f, 1*STRINGSIZE);
s[2] = physics.makeSpring(body, arm_l, 1.0f, 0.1f, 2*STRINGSIZE);
s[3] = physics.makeSpring(body, arm_r, 1.0f, 0.1f, 2*STRINGSIZE);
s[4] = physics.makeSpring(body, foot_l, 1.0f, 0.1f, 4*STRINGSIZE);
s[5] = physics.makeSpring(body, foot_r, 1.0f, 0.1f, 4*STRINGSIZE);

//end of first part

Andreas N. Fischer&&http://dasautomat.com

DasAutomat

Re: traer physics attractor problem
Reply #1 - Nov 6^th, 2006, 1:22am

//second part of the code

//s.setDamping(4f);
//s.setStrength(50f);
// s.setRestLength(1f);
a = new Attraction[8];
a[0] = physics.makeAttraction( foot_l, foot_r, -200, 5 );
a[1] = physics.makeAttraction( arm_l, arm_r, -120000, 5 );

a[2] = physics.makeAttraction( sideTractor, head, 500000, 5 );
a[3] = physics.makeAttraction( sideTractor, body, 500000, 5 );
a[4] = physics.makeAttraction( sideTractor, arm_r, 500000, 5 );
a[5] = physics.makeAttraction( sideTractor, arm_l, 500000, 5 );
a[6] = physics.makeAttraction( sideTractor, foot_r, 500000, 5 );
a[7] = physics.makeAttraction( sideTractor, foot_l, 500000, 5 );

a[2].setMinimumDistance(280000);
a[3].setMinimumDistance(280000);
a[4].setMinimumDistance(280000);
a[5].setMinimumDistance(280000);
a[6].setMinimumDistance(280000);
a[7].setMinimumDistance(280000);

}

//make boundary collision handler!!!

public void draw() {

int[] vals = Unimotion.getSMSArray();

sideTractor.moveTo( mouseX, mouseY, 0 );

if (!mousePressed)
physics.advanceTime(0.5f);

else {
body.moveTo((vals[0]*-1)*-width/2, (vals[1]+1)*height/2, 0);
arm_l.moveTo((vals[0]*-1)*-width/2, (vals[1]+1)*height/2, 0);
arm_r.moveTo((vals[0]*-1)*-width/2, (vals[1]+1)*height/2, 0);
//p.setVelocity((mouseX - pmouseX), (mouseY - pmouseY), 0);
}

background(255);
stroke(0);
// line(anchor.position().x(), anchor.position().y(), head.position().x(), head.position().y());
line(body.position().x(), body.position().y(), head.position().x(), head.position().y());

line(body.position().x(), body.position().y(), arm_l.position().x(), arm_l.position().y());
line(body.position().x(), body.position().y(), arm_r.position().x(), arm_r.position().y());
line(body.position().x(), body.position().y(), foot_l.position().x(), foot_l.position().y());
line(body.position().x(), body.position().y(), foot_r.position().x(), foot_r.position().y());

//strings
stroke(180);
line(arm_r.position().x(), arm_r.position().y(), 0, 0);
line(arm_l.position().x(), arm_l.position().y(), width, 0);
line(foot_r.position().x(), foot_r.position().y(), 0, 0);
line(foot_l.position().x(), foot_l.position().y(), width, 0);

noStroke();
ellipse(head.position().x(), head.position().y(), 12*BALLSIZE, 3*BALLSIZE);
ellipse(head.position().x(), head.position().y(), 9*BALLSIZE, 9*BALLSIZE);
ellipse(body.position().x(), body.position().y(), 12*BALLSIZE, 12*BALLSIZE);
ellipse(arm_l.position().x(), arm_l.position().y(), 6*BALLSIZE, 3*BALLSIZE);
ellipse(arm_r.position().x(), arm_r.position().y(), 6*BALLSIZE, 3*BALLSIZE);
ellipse(foot_l.position().x(), foot_l.position().y(), 8*BALLSIZE, 3*BALLSIZE);
ellipse(foot_r.position().x(), foot_r.position().y(), 8*BALLSIZE, 3*BALLSIZE);

ellipse(vals[0]*25,vals[1]*25,100,100);

ellipse(sideTractor.position().x(),sideTractor.position().y(), 25,25);

println(vals[0] + " " + vals[1] + " " + vals[2]);
}

public static void main(String[] args) {
PApplet.main(new String[] {
"Puppet_traer" }
);
}
}

Andreas N. Fischer&&http://dasautomat.com

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