How to display multiple line using nested loop

Processing Beginners
1

I am trying to draw a lane through the use of nested loop, where i can control the lanes through use of “final int”, I have pretty much tried everything but didn’t result as i would like to be.

2

The y-coordinate of every line is same regardles of the stage of the loops.
So only lines with y= height/2/ROAD_LANE will be drawn.

Does this resolve your issue?

final int ROAD_LANE = 4;

void setup() {
  size(800,300);
}

void draw() {
 lane(); 
}

//This is my nested loop to draw lanes across the window, but want them to create five of them rather than 1.
 
void lane () {
  stroke(255);
  strokeWeight(3);
  for (int lineX = 0; lineX < width ; lineX += 100) {
    for(int j = 0; j <= height; j+=height/ROAD_LANE) {
      line(lineX, j, lineX+50, j);
    }
  }
}
3

Thank you soo much it certainly does help, but how do i make sure it stays in top of the first half of the screen.

4

You can change the maximum value of j (y-coordinate to) height/2

final int ROAD_LANE = 4;

void setup() {
  size(800,300);
}

void draw() {
 lane(); 
}

//This is my nested loop to draw lanes across the window, but want them to create five of them rather than 1.
 
void lane () {
  stroke(255);
  strokeWeight(3);
  for (int lineX = 0; lineX < width ; lineX += 100) {
    for(int j = 0; j <= height/2; j+=height/ROAD_LANE/2) {
      line(lineX, j, lineX+50, j);
    }
  }
}
1 Like
5

Thanks, it worked, really appreciate it.