How do I make one perlin noise wave join another one underneath it, using points?

rimai

So I have a noise wave, and I have used a for loop to make points that travel under it, and I want them to stop at another perlin noise wave. Btw my code is really bad because I'm just a beginner :'(

This is my code:

float inc = 0.04;

void setup() {
  size(640, 500);
}

void draw() {
  background(255);

  float xoff=0;
  float xoff2=0;

  xoff2 += inc;

  stroke(245, 10, 100);
  strokeWeight(1.5);

  for (float x = 0; x < width; x++) {

    float y = noise(xoff) * 200;
    point(x, y);

    float t = noise(xoff2) * 400;

    //i+=5 = the space between the points vertically
    for (float i = y; i < t; i+=5) {
      point(x, i);
    }

    xoff += inc;
    x = x + xoff + 4;
  }
}

Chrisir

When you mean travel like an animation

look at lerp() command in the reference

rimai

I just mean like this^ but see at the bottom how they kind of just sit in a straight line? i want the bottom to also be curved

rimai

like to also be another perlin noise wave

koogs

where are you incrementing xoff2?

rimai

I thought that it would make another wave? hahah i don't really know im so lost :(

Chrisir

I don’t think you need two For loops

You only need one for x

both horizontal lines have the same x per column/ point

What‘s different is the y: you have an upper y, name it y1 and a lower one y2

your line command: line (x, y1, x, y2);

calculate the two y values with noise and use different xoffset values

Hit ctrl-t

Post your entire code

rimai

will this work for points though? even though you are using the line command?

Chrisir

Do the line thing first

That’s the requirement

Chrisir

Ah, you tried this already

Also look at command lerp() in the reference

koogs

where are you incrementing xoff2?

you are drawing a lines in a loop. each line goes between y and t

float y = noise(xoff) * 200;
float t = noise(xoff2) * 400;

which is fair enough.

so y changes when xoff changes and t changes when xoff2 changes. which brings me back to...

where are you incrementing xoff2?