<script>
function nextRandomInteger(limit) {
return Math.round(Math.random() * limit);
}
var alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
function randomAlphabet() {
return alphabet.charAt(nextRandomInteger(25));
}
function randomSpeed(maxSpeed) {
return Math.random() * maxSpeed - Math.random() * maxSpeed;
}
var canvasWidth = 700;
var canvasHeight = 500;
function MovingText() {
function nextRandomInteger(limit) {
return Math.round(Math.random() * limit);
}
var alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
function randomAlphabet() {
return alphabet.charAt(nextRandomInteger(25));
}
function randomSpeed(maxSpeed) {
return Math.random() * maxSpeed - Math.random() * maxSpeed;
}
var canvasWidth = 700;
var canvasHeight = 500;
function MovingText() {
this.x = nextRandomInteger(canvasWidth);
this.y = nextRandomInteger(canvasHeight);
this.vX = randomSpeed(10);
this.vY = randomSpeed(10);
this.body = document.createElement('h1');
this.body.innerHTML = randomAlphabet();
this.body.style.position = 'absolute';
MovingText.prototype.move = function () {
}
this.y = nextRandomInteger(canvasHeight);
this.vX = randomSpeed(10);
this.vY = randomSpeed(10);
this.body = document.createElement('h1');
this.body.innerHTML = randomAlphabet();
this.body.style.position = 'absolute';
MovingText.prototype.move = function () {
}
if (this.x < 0 || this.x > canvasWidth) {this.vX *= -1;}
if (this.y < 0 || this.y > canvasHeight) {this.vY *= -1;}
this.x += this.vX;
this.y += this.vY;
this.body.style.left = this.x + 'px';
this.body.style.top = this.y + 'px';
};
window.onload = function () {
if (this.y < 0 || this.y > canvasHeight) {this.vY *= -1;}
this.x += this.vX;
this.y += this.vY;
this.body.style.left = this.x + 'px';
this.body.style.top = this.y + 'px';
};
window.onload = function () {
var movingTexts = [];
for (var i = 0; i < 100; i++) {
movingTexts.push(new MovingText());
}
setInterval(function () {
for (var i in movingTexts) {
movingTexts[i].move();
}
}, 1000 / 60);
};
</script>
for (var i = 0; i < 100; i++) {
movingTexts.push(new MovingText());
}
setInterval(function () {
for (var i in movingTexts) {
movingTexts[i].move();
}
}, 1000 / 60);
};
</script>
오류도 없는데 빈화면으로밖에 나오질않네요...
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댓글 2개
소스를 작성하실때 function 의 시작과 끝을 잘 파악하셔야 하고 무조건 따라 작성하시기 보다는 코드의 흐름을 파악하시고 작성하시는것이 좋을 것 같습니다.
완성소스는 아래와 같습니다.
(참고문헌 : 모던 웹을 위한 javascript jQuery 입문 (윤인성 저) )
<!DOCTYPE html>
<html>
<head>
<script>
function nextRandomInteger(limit) {
return Math.round(Math.random() * limit);
}
var alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
function randomAlphabet() {
return alphabet.charAt(nextRandomInteger(25));
}
function randomSpeed(maxSpeed) {
return Math.random() * maxSpeed - Math.random() * maxSpeed;
}
</script>
<script>
var canvasWidth = 700;
var canvasHeight = 500;
function MovingText() {
this.x = nextRandomInteger(canvasWidth);
this.y = nextRandomInteger(canvasHeight);
this.vX = randomSpeed(10);
this.vY = randomSpeed(10);
this.body = document.createElement('h1');
this.body.innerHTML = randomAlphabet();
this.body.style.position = 'absolute';
document.body.appendChild(this.body);
}
MovingText.prototype.move = function () {
if (this.x < 0 || this.x > canvasWidth) {this.vX *= -1;}
if (this.y < 0 || this.y > canvasHeight) {this.vY *= -1;}
this.x += this.vX;
this.y += this.vY;
this.body.style.left = this.x + 'px';
this.body.style.top = this.y + 'px';
};
</script>
<script>
window.onload = function () {
var movingTexts = [];
for (var i = 0; i < 100; i++) {
movingTexts.push(new MovingText());
}
setInterval(function () {
for (var i in movingTexts) {
movingTexts[i].move();
}
}, 1000 / 60);
};
</script>
</head>
<body>
</body>
</html>