Okay, looking forward to it  ;)

Maybe you can help here.. there seems to be an problem with the "MotionConstant.REVERSE". It kinda like jumps to its "Start size" before reversing..


import ijeoma.motion.tween.*;
import ijeoma.motion.*;
import ijeoma.motion.easing.*;

Tween shdX,shdY,shd;

void setup() {

   size(400,250);
   frameRate(30);
   smooth();

   shdX = new Tween(this, "shadow_x", 50, 10, 50);
   shdY = new Tween(this, "shadow_y", 50,10, 50);

 TweenGroup shd = new TweenGroup(this, new Tween[]{ shdX, shdY });
 
 shd.repeat(MotionConstant.REVERSE);
 shd.play();
}



void draw(){

 background(255);
 fill(50);
 noStroke();
 ellipse(200, 100,shdX.getPosition(), shdY.getPosition());

}



sorry if it´s all unclear ... me still learning processing.

thanx
dunn

...using the new version of Processing 1.1

Fairly new to Processing, but love the library.  I have been struggling a little though trying to use the setBegin and setEnd methods.  In my sketch I am trying to let the user define the start,end, and duration of 3 tweens.  These should probably be in a TweenGroup or using motion parameters, but like I said fairly new and trying to understand from the bottom up.  I have no problem altering the duration using setDuration, but neither of the other methods seem to work.  In fact, now I am seeing even odder behavior where the Tween seems to build from one execution to another.

Here is my code:
import controlP5.*;
import ijeoma.motion.tween.Tween;
import ijeoma.motion.Motion;

Motion travtween;
Motion turtween;
Motion transtween;
ControlP5 controlP5;
PFont font;

float trav = 0.0;
float turtle = 0.0;
float rot = 0.0;
float trans = 0.0;
float strav = 0.0;
float sturtle = 0.0;
float strans = 0.0;
float etrav = 300;
float eturtle = 360;
float etrans = 20;

float runtime = 300;
PShape bus;
String easetype = "LINEAR_EASEBOTH";

void setup() {
 size(600, 600);
 controlP5 = new ControlP5(this);
 
 controlP5.addSlider("strav",0,300,100,50,480,100,10);
 controlP5.addSlider("sturtle",0,360,0,50,520,100,10);
 controlP5.addSlider("strans",-20,20,0,50,560,100,10);
 controlP5.addSlider("etrav",0,300,100,400,480,100,10);
 controlP5.addSlider("eturtle",0,360,0,400,520,100,10);
 controlP5.addSlider("etrans",-20,20,0,400,560,100,10);
 controlP5.addKnob("runtime",0,600,0,400,420,40);

 font = createFont("Calibri",14);
 textFont(font);
 
 travtween = new Motion (this, "tween1",strav,etrav,runtime);
 turtween = new Motion (this, "tween2",sturtle,eturtle,runtime);
 transtween = new Motion (this, "tween3",strans,etrans,runtime);
 
 //tween.play();
 
 
 frameRate(30);
 
 
 smooth();
 bus = loadShape("bus.svg");
 strokeWeight(1.0);
 stroke(0, 100);
 rectMode(CENTER);
 ellipseMode(CENTER);
 shapeMode(CENTER);
}

void draw() {
 background(50);
 stroke(0,100);

 travtween.setDuration(runtime);
 turtween.setDuration(runtime);
 transtween.setDuration(runtime);
 
 boolean a = (travtween.isPlaying);
 println ("a="+a);
 
 if (!a) {
 travtween.setBegin(strav);
 turtween.setBegin(sturtle);
 transtween.setBegin(strans);
 
 travtween.setEnd(etrav);
 turtween.setEnd(eturtle);
 transtween.setEnd(etrans);
 }
println("strav="+strav);
println("sturtle="+sturtle);
println("strans="+strans);


println("travBegin="+travtween.getBegin());
println("turBegin="+turtween.getBegin());
println("transBegin="+transtween.getBegin());

println("travEnd="+travtween.getEnd());
println("turEnd="+turtween.getEnd());
println("transEnd="+transtween.getEnd());

println("trav="+travtween.getPosition());
println("turEnd="+turtween.getPosition());
println("transEnd="+transtween.getPosition());

 trav = travtween.getPosition();
 rot = radians(turtween.getPosition());
 trans = transtween.getPosition();

 
 pushMatrix();
 translate(300,trav+100);
 rect(0,0,25,100);
   
   
   ellipse(0,0,30,30);
   stroke(0,255);
     pushMatrix();
     segment(0,0,rot);
       pushMatrix();
          rect(0,trans,10,40);
          pushMatrix();
            translate(0,trans);
            stroke(1);
            scale(.25);
            rotate(HALF_PI);
            shape(bus,0,0);
         popMatrix();
         ellipse(0,0,10,10);
       popMatrix();
     popMatrix();
 popMatrix();

 noStroke();
 fill(255);
 
 String knobtime = runtime/30 + "secs";
  text(knobtime, width - textWidth(knobtime) - 10, 440);
 String timeAsString = travtween.getTime() + " / " + travtween.getDuration();
 text(timeAsString, width - textWidth(timeAsString) - 10, 20);

}


void keyPressed() {
 if (key == ' ') {
   if ((travtween.isPlaying)||(turtween.isPlaying)||(transtween.isPlaying)){
     travtween.pause();
     turtween.pause();
     transtween.pause();
   } else{
     travtween.resume();
     turtween.resume();
     transtween.resume();
 }}
 else if (keyCode == ENTER) {
     travtween.play();
     turtween.play();
     transtween.play();
 }
}


void segment(float x, float y, float a) {
 translate(x, y);
 rotate(a);
 line(0, 0, 15, 0);
//rotate(-a);
}

Any help / guidance would be greatly appreciated.  I have a more complex question as well, but I think I;ll get over this hurdle first.

Thanks,

Chuck

So I think I may have found the root of my problem.  In looking through the source on GoogleCode I was able to find the setEnd() method:

Code:

	  public void setEnd(float _end) {
		    begin = position;
		    end = _end;
		    change = end - begin;
	  }
 

I am confused by the first line of this method.  It makes me think that anytime I call setEnd(), that I am really going to alter my Begin as well since the begin in going to be reset to the current position.  This would seem to be a bug, or maybe I am using these methods incorrectly.

My goal is to allow the user to set the start and end positions for the objects, as well as duration through some user controls.  Essentially they can adjust the animation and then execute until they get a set of values they like.

Ultimately the goal is to add some physics processing such that users could enter a start, end , duration, acceleration time, and deceleration time and then the animation would run using the user values.  I would like to get all of this working inside a class, as hopefully there would be multiple objects all running concurrently for each "scene".

Any help/guidance is appreciated.

Chuck