SketchBook

始業式前日の私

var ball_num;
var ballX = [];
var ballY = [];
var speedX = [];
var speedY = [];
var ball_color = [];
var ball_diameter = [];

var colors = [];

function setup() {
createCanvas(windowWidth,
windowHeight);

 ball_num = 900;

colors.push(color(64, 160, 255));
colors.push(color(0, 0, 192));
colors.push(color(0, 0 , 255));
 colors.push(color(0 ,96 ,192));
 colors.push(color(96,0 ,192));
colors.push(color(255 ,128 ,0));
colors.push(color(0,0, 255));
colors.push(color(0 ,64, 128));

for (var i = 0; i < ball_num; i = i + 1) {
ballX[i] = random(0, windowWidth);
ballY[i] = random(0, windowHeight);
speedX[i] = random(-2.0, 1.0);
speedY[i] = random(-2.0, 2,0);
ball_color[i] = floor(random(0, colors.length));
   ball_diameter[i] = random(7, 15);
}
}

function draw() {
background(255, 128, 192, 80);
noStroke();

for (var i = 0; i < ball_num; i++) {
ballX[i] = ballX[i] + speedX[i];
ballY[i] = ballY[i] + speedY[i];

if (ballX[i] > windowWidth || ballX[i] < 0) {
speedX[i] = -1 * speedX[i];
}

if (ballY[i] > windowHeight || ballY[i] < 0) {
speedY[i] = -1 * speedY[i];
}
}

for (var i = 0; i < ball_num; i++) {
fill(colors[ball_color[i]]);
ellipse(ballX[i], ballY[i], ball_diameter[i]);
}

}