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Pulsating circles

[1 Reply]
- 04-Nov-2011 04:28 AM
- Forum: Programming Questions
Ok so I am a complete noob at this but I would like to create pulsating circles that can randomly appear in different sizes, colours and speeds, and ultimately in the end appear and pulse to music, but thats way off in the future.

I assume I have to put the circles in an array and I have already used some random functions for colour and co-ordinates when mouse pressed, but I am completely lost now it come to adding circles.

I have this so far,

<Code>

int r = 255;

int g = 255;

int b = 255;

int a = 75;

// Global variables

float radius = 150.0;

int X, Y;

int nX, nY;

int delay = 1;

// Setup the Processing Canvas

void setup(){

size(1263, 673);

noStroke();

frameRate( 100 );

X = (int) random(width/1);

Y = (int) random(width/3);

nX = X;

nY = Y;

}

// Main draw loop

void draw(){



radius = radius - sin( frameCount / 60 );



// Track circle to new destination

X+=(nX-X)/delay;

Y+=(nY-Y)/delay;



// Fill canvas white

background(255);



// Set fill-color to blue

//noFill();

fill(r,g,b,a);

// Set stroke-color white

//stroke(211, 50, 74);

//strokeWeight(3);

noStroke();



// Draw circle

ellipse( X, Y, radius, radius );

}

// Set circle's next destination

void mousePressed(){

nX = (int) random(width);

nY = (int) random(height);



r = (int) random (255);

g = (int) random (255);

b = (int) random (255);

//a = (int) random (255);

}

Any help would be awesome.

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