reach an item in array

Programming Questions

sylvain.u..

in Programming Questions • 1 year ago

Hi everybody

i am trying to reach a certain item in an array.

For exemple, my array display 10 ball and i want the ball n°2 to be fill with a different color

the three commented line is one of my attempt to do it. Any clue ?

Thank you !

Replies(2)

sylvain.u..

1 year ago

I've just found this (a second ago...)

              
               int[] radius = { 8, 16, 24, 32, 48 };

It might be a solution right ?

v.k.

1 year ago

try, is this what you want?

You may include a constructor that takes a color also.

//Declare
Ball [] ballCollection = new Ball[200];
void setup(){
size(600,600);
smooth();
//Initialize
for( int i = 0 ; i < ballCollection.length ; i ++){
ballCollection[i] = new Ball(random(0,width),random(0,200));
}
// change a especifc color
ballCollection[99].setColor(color(200,80,250));
}
void draw(){
background(0);
//Call Functionality
for( int i = 0 ; i < ballCollection.length ; i ++){
ballCollection[i].run();
// change on the fly
if(frameCount % 200 == 0)
ballCollection[22].setColor(color(random(100,255),random(100,255), random(0,80)));
// stroke (255,0,0);
// ballCollection[5].run();
// noStroke();
}
}
// and the class
class Ball {
// Global variables
float x = 0;
float y = 0;
float speedX = random(-4,4);
float speedY = random(-1,1);
color ballColor;
// Constructor
Ball(float _x, float _y) {
x = _x;
y = _y;
ballColor = color (255); // DEFAULT COLOR
}
//Functions
void run() {
// fill(random(0,255),0,0);
display();
move();
bounce();
gravity();
}
void gravity() {
speedY += 0.2;
}
void bounce() {
if (x > width) {
speedX = speedX *-1;
}
if (x < 0) {
speedX = speedX *-1;
}
if (y > height) {
speedY = speedY *-1;
}
if (y<0 ) {
speedY = speedY *-1;
}
}
void move() {
x += speedX;
y += speedY;
}
void display() {
fill(ballColor);
ellipse(x, y, 20, 20);
}
/// a set color method
void setColor(color c)
{
ballColor = c;
}
}