Beginner I need help with my code

Programming Questions

guy_lemai..

Beginner I need help with my code

in Programming Questions • 2 years ago

Excuse my English is very bad.
My image "Guygde.jpg"is much larger than the working window.
If I put my picture in the setup, the drawing plot is perfect, but I do not move in the window.
If I put my picture in draw () I can move in the window but I do not drawing plot.
Another question: how to save the trace to a file?
Thank you .. A beginner discouraged! THANKSSSSSS

ArrayList history = new ArrayList();
float distthresh = 60;
PImage b;
float scaleValue = 1;
float imgX, imgY;
void setup(){
size(900,600);
b = loadImage("Guygde.jpg"); // 1328 by 1372 pixel

background(0);
image(b, 0, 0);
stroke(0,50);
smooth();
}

void draw(){

translate( imgX, imgY );
// image(b, 0, 0);
if (keyPressed) // si une touche est pressée
{
    if (key == CODED)
    {
      if (keyCode == DOWN)
      {
        imgY = imgY-10;
      }
      if (keyCode == UP)
      {
       imgY = imgY+10;
      }
      if (keyCode == LEFT)
      {
        imgX = imgX-10;
      }
      if (keyCode == RIGHT)
      {
       imgX = imgX+10;
      }
    }
}

}

void mouseDragged(){

PVector d = new PVector(mouseX,mouseY,0);
history.add(0,d);

for (int p=0; p<history.size(); p++){
    PVector v = (PVector) history.get(p);
    float joinchance = p/history.size() + d.dist(v)/distthresh;
    if (joinchance < random(0.4)) line(d.x,d.y,v.x,v.y);
}
}

void keyPressed(){
if (key == ' ') {
    background(0);
    history.clear();
}
}

Replies(4)

quarks

Re: Beginner I need help with my code

2 years ago

In mouseDragged add the new point to the array list but do not draw the line. Then in the draw method add code to draw the whole arralist

PVector v = (PVector) history.get(0);
for (int p=1; p<history.size(); p++){
    Pvector next = history.get(p);
    line(v.x,v.y,next.x,next.y);
    v = next;
}

guy_lemai..

Re: Beginner I need help with my code

2 years ago

Dear quarks
Thank you for your help.
Tomorrow morning I'll try to understand your change.
I have very difficult to understand how an "array list" work but I think i have understood you the need to load the data into mouseDragged () but drawing in draw ().
It's very nice to help beginners.
Unfortunately, in Belgium there is no training in processing, I learned with Learning processing of Mr. Shiffman.
Guy