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leaving trails (Read 700 times)
annemarie
leaving trails
Aug 3rd, 2006, 4:10am  
Hi,

Is there a way that I can make the line leave a trail while the box doesn't leave a trail?

Thanks,
annemarie




import processing.opengl.*;

float count = 0;
float count2 = 0;
//////////////////////////////////////
STROKE trail;
class STROKE {
 void leaveTrail() {
   count=count+0.3;
   if(count >= 200) { count = 0; }
   stroke(255);
   rect(30+count, 100, 2, 30);
 }
}
//////////////////////////////////////
RECT rectTrail;
class RECT {
 void noTrail() {
 count2=count2+0.1;
 if(count2 >= 50) { count2 = 0; }
 stroke(255);
 rect(0, 100-count2, 30, 30);
 }
}
//////////////////////////////////////
void setup(){
 size(200,200, OPENGL);
 trail = new STROKE();
 rectTrail = new RECT();
}


void draw(){
background(0);
 
 trail.leaveTrail();  
 rectTrail.noTrail();
}
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eskimoblood
Re: leaving trails
Reply #1 - Aug 3rd, 2006, 11:44am  
Yes, you need a PGraphic object where you draw the lines. Then you draw the PGraphic to the applet an then you draw the rect to the applet.
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Andreas Köberle {eskimoblood}
222550793  
eskimoblood
Re: leaving trails
Reply #2 - Aug 3rd, 2006, 12:35pm  
Here is piece of code to show how to generate a PGraphic object and how to use them:

Quote:



PGraphics graphic;
void setup(){
 size(400, 400,P3D);
 graphic = createGraphics(width, height,P3D,null);
 graphic.defaults();
 graphic.background(125);
}
void draw(){
 graphic.line(0,0,mouseX,mouseY);
 image(graphic,0,0);
}


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Andreas Köberle {eskimoblood}
222550793  
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