Hi, Marius. It has same error like my attempt (the last but one post in the thread). In my sketch I draw a opacity rectangle polygon, with the size of the screen, at the begin of the drawing loop, then I clear the depth buffer and then the rest will be drawn. Normally this would give me trails but in your and mine solution it fails.

Hello Marius!
Thank’s for this, like usual it is really great.
But, because there is always a but, unfortunatly it isn’t functionning for me.
When I draw something the draw function will erase it in the next frame so except if I draw each object, each frame I can’t do anything.
Here is a small exemple of code where it’s not functionning:
import processing.opengl.*;

void setup(){
size(400,400,OPENGL);
background(255);
}
void draw(){
}
float x,y;
void mousePressed(){
x = mouseX;
y = mouseY;
}
void mouseReleased(){
leaf(x,y,mouseX,mouseY);
}
void leaf(float x1,float y1,float x2, float y2){
float dx = x1-x2;
float dy = y1-y2;
float d = sqrt(dx*dx+dy*dy);
float a = atan2(dy,dx);
float ar1 = random(-2.7,-3);
float ar2 = random(-.2,-.9);
float l1 = random(.4,.7);
float l2 = l1+random(-.2,.2);
float cx1 = x1+cos(a+ar1)*d*l1;
float cy1 = y1+sin(a+ar1)*d*l1;
float cx2 = x2+cos(a+ar2)*d*.3;
float cy2 = y2+sin(a+ar2)*d*.3;
noStroke();
fill(random(255));
bezier(x1,y1,cx1,cy1,cx2,cy2,x2,y2);
cx1 = x1+cos(a-ar1)*d*l2;
cy1 = y1+sin(a-ar1)*d*l2;
cx2 = x2+cos(a-ar2)*d*.3;
cy2 = y2+sin(a-ar2)*d*.3;
bezier(x1,y1,cx1,cy1,cx2,cy2,x2,y2);
}

Hope it help you. (I’m on an old PC with winXP sp2, an ATIRadean 9600xt, the last java and the last processing).

Best Regards!!!

Simon.

thanx 1000000000 MARIUS !!!!

creating hacked PGraphicsOpenGL 4
17.746 [50]
40.08 [50]
42.735 [50]
43.011 [50]
42.735 [50]
43.908 [50]
43.243 [50]
43.716 [50]
43.011 [50]
43.86 [50]
43.431 [50]
44.593 [50]
43.716 [50]
38.059 [200]
21.61 [400]
11.884 [1600]
6.96 [3200]

now it work properly…..finally!
u always over the edge….eheh
see ya bro

Patrik

thanks for that bit of info, David - I was totally wondering about those!?!? That’s some buggy stuff. Can’t wait to try out this bug fix.

andreas