SketchBook

技術(別学)

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(0, 90, 200));
colors.push(color(0, 220, 230));
 colors.push(color(100, 180, 200));
 colors.push(color(200, 210, 235));
 colors.push(color(245, 230, 270));
colors.push(color(250, 210, 210));
 colors.push(color(111, 111, 111));
colors.push(color(255, 130, 90));

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, 2.0);
speedY[i] = random(-2.0, 2.0);
ball_color[i] = floor(random(0, colors.length));
ball_diameter[i] = random(5, 20);
}
}

function draw() {
 background(250, 250, 250, 100);
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]);
}

}