実際に動くページ
http://ashtarte.pa.land.to/test/p5js/splash/
function DbgMessage(tx) {
if (height < DbgMessageY + LineHeight) {
DbgMessageY = DbgMessageBaseY;
DbgMessageX += DbgMessageW;
}
text(tx, DbgMessageX, DbgMessageY);
DbgMessageY += LineHeight;
}
let circleGross, circleGrossBias, diminutiveGross, diminutiveGrossBias;
let circleQuantity = 300;
let step = new Array(circleQuantity);
let circle = new Array(circleQuantity);
let dx = new Array(circleQuantity);
let dy = new Array(circleQuantity);
function setup() {
createCanvas(windowWidth, windowHeight);
ViewMinimum = min(width, height);
ViewMaximum = max(width, height);
ViewOX = width / 2;
ViewOY = height / 2;
FontFamily = 'MS PMincho';
textFont(FontFamily);
// FontSize = ceil(textWidth('╋'));
FontSize = round(ViewMinimum / 48);
textSize(FontSize);
// lineSpace = 2;
LineHeight = round(FontSize);
DbgMessageW = floor(ViewMaximum / 3);
DbgMessageBaseX = FontSize / 2;
DbgMessageBaseY = LineHeight * 1.25;
smooth(); // アンチエイリアス(図形のエッジを滑らかにする)
noStroke();
BackColor = '#000000';
circleGross = ViewMinimum * 0.05;
circleGrossBias = ViewMinimum * 0.01666;
diminutiveGross = ViewMinimum * 0.0333;
diminutiveGrossBias = -ViewMinimum * 0.01666;
for (let i = 0; i < circle.length; i++) {
SetCircle(i);
}
}
function draw() {
background(BackColor);
fill('#ffffff'); // 塗りつぶし
DbgMessageX = DbgMessageBaseX;
DbgMessageY = DbgMessageBaseY;
DbgMessage('Hello World');
DbgMessage('width=' + width);
DbgMessage('height=' + height);
DbgMessage('FontSize=' + FontSize);
DbgMessage('LineHeight=' + LineHeight);
fill(255, 255, 255, 180);
for (let i = 0; i < circle.length; i++) {
if (OutOfRange(i)) {
SetCircle(i);
}
ellipse(
ViewOX + dx[i] * step[i],
ViewOY + dy[i] * step[i],
circle[i],
circle[i]
);
step[i]++;
}
}
function SetCircle(i) {
step[i] = 0;
circle[i] = random(circleGross) + circleGrossBias;
dx[i] = random(diminutiveGross) + diminutiveGrossBias;
dy[i] = random(diminutiveGross) + diminutiveGrossBias;
}
function OutOfRange(i) {
let res =
0 - circle[i] > ViewOX + dx[i] * step[i] ||
width + circle[i] < ViewOX + dx[i] * step[i] ||
0 - circle[i] > ViewOY + dy[i] * step[i] ||
height + circle[i] < ViewOY + dy[i] * step[i];
return res;
}
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掲示板に書き込む前に必ず この ”注意書き”を お読み下さい．
http://ashtarte.hotcom-web.com/utf8/smt.cgi?r+rpr/ を ご利用 下さい。
