P5 code into Java code

p5.js Coding Questions
1

Hello everyone,
I am getting into programming and processing and am finding it difficult to adapt code written for “p5” into “Java”. Can anyone possibly help me how to convert this code for sand into a java code?

Kind regards
Hanna

setup=_=>{createCanvas(W=1194,H=834)
stroke(255,210,100)
strokeWeight(f=2)}
draw=_=>{clear(t=map(sin(f+=0.01),-1,1,64,200))
for(y=0;y<H;y+=3)for(x=0;x<W;x+=3)
point(cos(r=noise(x/W,y/H-f)*t)*TAU+x,sin(r)*TAU+y)}
2 
float f,t; 
int W,H;

void setup () {
    size(1111, 664); 

    W=width;
    H=height;

    stroke(255,210,100);
    strokeWeight(2);
}

void draw () {
    background (0); // not sure?

    t=map(sin(f+=0.01),-1,1,64,200);

    float TAU=TWO_PI;

    for(int y=0;y<H;y+=3){
        for(int x=0;x<W;x+=3){
            r=noise(x/W,y/H-f)*t;
            point(cos(r)*TAU+x,sin(r)*TAU+y);
        }
    }
}
3 Likes
3

Thank you very much Chrisir,
unfortunately I still have a little problem with it. Can you give me a hint why it doesn’t work?

Still a problem
Still a problem920×971 47.9 KB

1 Like
4

Corrected above

One ) too much

5

Do you see anything when you run the code?
I only get errors all the time

1 Like
6

float r =noise(x/W,y/H-f)*t; was missing float
I see things :eye: :eye:

2 Likes
7

Eyes of an eagle…!

Well done.

2 Likes
8

Thank you very much! Now I also see things… but somehow it doesn’t look like this example here :smiley:

Does anyone of you have an idea why not?

Sand p5
Sand p52388×1668 674 KB

9

Do you have a Idea why that would not work?

11

Thank you very very much! I’ve been sitting here for so long trying to understand what’s happening…
This definitely helps me a lot!

It’s so cool that you can understand the code and even find bugs!

Thank you!

(Can I get in touch if I have any more questions?)

2 Likes
12

Sure can, this is a very friendly community here.:slight_smile: cheers

In Java you need to tell what you are going to assign to a var. if you divide a Float by an Int the result is going to be an int. So when ‘H’ and ‘W’ were ints all results have no decimals, ruining the noise making the pattern.
Have fun :slight_smile:

5 Likes