color problem

Programming Questions

doh111

in Programming Questions • 1 month ago

I am using an array with color, I want my color to be different for each ball. I keep getting all the same color for the balls. here is my code

class SplashScreen
{
PImage button;
PVector Ilocation, Ivelocity;
Ball [] ball;
color [] colour;
public SplashScreen()
{
Ilocation = new PVector(width/2, -160);
Ivelocity = new PVector(0, 20);
button = loadImage("play_Button.gif");
ball = new Ball[50];
colour = new color[50];
for (int i = 0; i<ball.length; i++) {
ball[i] = new Ball(int(random(150, 200)),
int(random(150, 200)), int(random(50, 100)));
}
for (int x = 0; x<colour.length; x++) {
colour[x] = color(random(255), random(255), random(255));
}
}
void update()
{
Ilocation.add(Ivelocity);
}
void draw()
{
for (int i = 0; i <ball.length; i++)
{
for (int x=0; x<colour.length; x++) {
fill(colour[x]);
}
ball[i].draw();
}
update();
imageMode(CENTER);
image(button, Ilocation.x, Ilocation.y, button.width, button.height);
check();
}
void check()
{
if (Ilocation.y == height/2)
Ivelocity.y=0;
}
}

thanks in advanced. I'm a beginner

Replies(4)

tfguy44

Re: color problem

1 month ago

for (int i = 0; i <ball.length; i++)
{
// for (int x=0; x<colour.length; x++) {
fill(colour[i]);//x]);
//}
ball[i].draw();
}

doh111

Re: Re: color problem

1 month ago

That one worked!

Thanks tfguy44

GoToLoop

Re: color problem

1 month ago

I don't see your Ball class anywhere!
And if you want each Ball object to have its own color, why not store that information right there?

doh111

Re: Re: color problem

1 month ago

GoToLoop here you go :) you're right I should of put the color info inside it.

Ball b1, b2;
SplashScreen start;
int i = 0;
void setup()
{
size(400, 400);
smooth();
start = new SplashScreen();
b2 = new Ball(int(random(40, 50)), int(random(100, 200)), 20);
b1 = new Ball(width/2, height/2, 20);
b1.velocity.x = 0;
b1.velocity.y = 0;
}
void draw()
{
switch(i)
{
case 0:
background(255);
start.draw();
break;
case 1:
background(150);
fill(255, 0, 0);//red
b1.draw();
fill(0, 0, 255);
b2.draw();
//you are passing in bx1, by1...etc...but those
// values never change...you want to use the ball
// location since it is always changing...look
// at the print out ;-) you can use b1.location.x and b1.location.y
if (ballCollision(b1.location.x, b1.location.y, 20, b2.location.x, b2.location.y, 20) == true)
{
pushStyle();
fill(0, 255, 0);
b2.draw();
popStyle();
println("hit");
i = 0;
//b2.velocity.x = b2.velocity.x *-1;
}
break;
default:
break;
}
}
void keyPressed()
{
if (key == CODED)
if (keyCode == RIGHT)
{
println("right");
b1.velocity.x = 1;
}
else if (keyCode == LEFT)
{
println("left");
b1.velocity.x = -1;
}
else if (keyCode == UP)
{
println("up");
b1.velocity.y = -1;
}
else if (keyCode == DOWN)
{
println("down");
b1.velocity.y = 1;
}
}
void keyReleased()
{
if (key == CODED)
if (keyCode == RIGHT)
{
b1.velocity.x = 0;
}
else if (keyCode == LEFT)
{
println("a");
b1.velocity.x = 0;
}
else if (keyCode == UP)
{
println("w");
b1.velocity.y = 0;
}
else if (keyCode == DOWN)
{
println("s");
b1.velocity.y = 0;
}
}
void mousePressed() {
if (mouseX > width/2 - start.button.width &&
mouseX < width/2 + start.button.width &&
mouseY > height/2 - start.button.height &&
mouseY < height/2 + start.button.height)
i = 1;
}
//change the name of this function...ballBall is a bad name...the
// name of the function should describe what it does :-)
boolean ballCollision(float x1, float y1, int d1, float x2, float y2, int d2)
{
//you can you the dist() function to calculate the distance...
float distances= dist(x1, y1, x2, y2);
println("dist: " + distances);
if (d1/2+d2/2 > distances)
{
return true;
}
else
{
return false;
}
}

ball class

class Ball
{
PVector location, velocity;
int size;
public Ball(int _x, int _y, int _size)
{
location = new PVector(_x, _y);
size = _size;
velocity = new PVector(int(random(-2, 2)), int(random(-2, 2)));
}
void update()
{
location.add(velocity);
//println(velocity);
}
void draw()
{
update();
check();
ellipseMode(CENTER);
ellipse(location.x, location.y, size, size);
}
void check()
{
// checks if it hits screen walls
if (location.x + size/2 > width || location.x - size/2 < 0)
velocity.x = velocity.x*-1;
if (location.y + size/2 > height || location.y - size/2 < 0)
velocity.y = velocity.y * -1;
}
}

I guess it was because I set the color outside the class.

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