Hello everyone, I'm trying to make a radial gradient using pixels[] and I have to use dist() to do it from the center, but I'm not sure how to do it. So far I'm making a linear gradient, here is the code:

1. PImage img;
2. void setup() {
3.   size(800, 600);
4. }
5. void draw() {
6.   background(0);
7.   img = createImage(300, 300, RGB);
8.   for (int i = 0; i < img.pixels.length; i++) {
9.     float c = map(i, 0, img.pixels.length, 0, 255);
10.     img.pixels[i] = color(c);
11.   }
12.   image(img, 250, 150);
13. }

Now, what I need to do is this:

Any help will be much appreciated, thanks.

I have an ArrayList that is filled with different kinds of objects and I need those objects to interact ones with others.

So, I have an ArrayList called bacteria and inside it is storing objects BacteriaOne, BacteriaTwo, BacteriaThree and BacteriaFour. Now I want that the BacteriaOne objects combine with BacteriaTwo objects only, but I don't know how to differentiate one type from the other.

I'm using a for to detect the contact between bacteria, but of course I'm doing it wrong because it is taking all the four kinds of bacteria.

1. for (int i= 0; i<bacteria.size(); i++) {
2.         if (dist(bacteria.get(i).getPosX(), bacteria.get(i).getPosY(), bacteria.get(i).getPosX(), bacteria.get(i).getPosY())<30) {
3.           bacteria.remove(i);
4. }

Now can someone please help me and tell me how can I differentiate when only BacteriaOne and BacteriaTwo make contact? Thanks in advance.

Hello everyone, I'm making a game where I have to press a secuence of keys in order to fill up an empty bar, but I don't know how can I do it. You are supposed to press "X" and then "C" repeteadly to do so, but I'm stuck right now and have no idea how to validate one after the other. Any help would be appreciated.

Hello everybody, I'm making a game where you have to catch some items that are all over the canvas and I want those items to move randomly when you are not moving the mouse. I have the code for the random movement, but I need some help to tell processing when the user is not doing anything. How can I do it? Thanks in advance.

Hello everybody. As an assignment for my Programming class I have to make a Space Invaders alike game. I'm trying to shoot everytime I press the space bar, but so far it only shoots once.

I did a "for" to display 5 images (the bullets), but they appear all at the same time and I just need one to appear at a time. Could anyone help me with this please?

How do I get it to display one image everytime I press the space bar and the max amount of them being 5?

Hi, I have a 20x15 2d array like this:

1. int [][] matrizMonedas= {
     { 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0},
   
2.   {0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0},
     {0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0},
     {0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0},
     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
     {0, 0, 0, 0, 1, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 1, 0, 0, 0, 0},
     {0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0},
3.   {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
     {0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0},
     {0, 0, 0, 0, 1, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 1, 0, 0, 0, 0},
     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
     {0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0},
     {0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0},
     {0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0},
     {0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0},
   };

And it changes over time to just plain zeroes. What I'm trying to do is to restart the original array when I press any key, without restarting the whole application, but I don't know how to do it and I have searched but I haven't found the answer. Maybe someone could help.

Hello again. I'm trying to move The Joker along these lines, but when I get to the third arrow it gets stuck in there and I don't know how to avoid that. How would you do it?

1. image(joker, jokerX, jokerY);
2.       jokerX+=2;
3.       if (jokerX==520) {
4.         jokerX-=2;
5.         jokerY+=2;
6.         if (jokerY==240) {
7.           jokerY-=2;
8.           jokerX-=2;
9.         }
   
10.      }

Hello everybody. I have coordinates for the position of an image stored in 4 different if's so it can appear in 4 different positions. What I want to do is to create a random number so it shows what's inside just one if.

The problem here is that random() generates lots of numbers and I only need the first one it generates.

Here's what I have.

1. int posXRandomItem=0;
2. int posYRandomItem=0;
3. int randomItem = (int) random(4);
4. 
   
5. if (randomItem==1){
6.  posXRandomItem=40;
    posYRandomItem=120;
7. }
8. 
   
9. if (randomItem==2){
10.  posXRandomItem=200;
     posYRandomItem=120;
11. }
12. 
    
13. if (randomItem==3){
14.  posXRandomItem=360;
     posYRandomItem=120;
15. }
16. 
    
17. if (randomItem==4){
18.  posXRandomItem=520;
     posYRandomItem=120;
19. }
20. 
    
21. image(itemJustice, posXRandomItem, posYRandomItem);
    

Hello everyone, I'm very new to Processing and I have this assignment for my programming class at the university. I have to make a Fibonacci spiral like this:



So I have an image of this teardrop like thing and I need to repeat it itself following this spiral while changing its size.

I really have no idea of how to do it and I have to finish it by tomorrow, any help please?