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script.js
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script.js
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//https://webdoli.tistory.com/24 참고하고 있음
function ball(){
window.x = canvas.width / 2;
window.y = canvas.height / 3;
window.r = canvas.width/45;
window.dx = 5;
window.dy = -5;
}
function paddle(){
window.pX = x;
window.pHeight = x/15;
window.pWidth = x/4;
window.pLeft = false;
window.pRight = false;
}
function brick(row, col){
window.bricks = [];
window.row = row;
window.col = col;
window.bW = canvas.width / (col+1);
window.bH = canvas.height / 10;
window.bWS = bW/10;
for(let i=0; i<row; i++){
window.bricks[i] = [];
for(let j=0; j<col; j++){
bricks[i][j] = {};
bricks[i][j].x = bW/2 + j*bW;
bricks[i][j].y = bH/2 + i*bH;
bricks[i][j].exist = true;
}
}
}
function init(){
window.canvas = document.getElementById('game');
window.scr = canvas.getContext('2d');
document.addEventListener('keyup', keyupHandler);//키뗄때
document.addEventListener('keydown', keydownHandler);//키누를때
document.addEventListener('mousemove', mouseHandler);//마우스움직일때
ball();
paddle();
brick(3, 8);
window.score = 0;
window.game_over = false;
loop();
}
function keydownHandler(input){
if(input.keyCode == 39){//오른쪽
window.pRight = true;
}
if(input.keyCode == 37){//왼쪽
window.pLeft = true;
}
}
function keyupHandler(input){
if(input.keyCode == 39){//오른쪽
window.pRight = false;
}
if(input.keyCode == 37){//왼쪽
window.pLeft = false;
}
}
function mouseHandler(input){
const relativeX = input.clientX - canvas.offsetLeft;
//모니터 왼쪽 끝부터의 거리 - 캔버스의 왼쪽 끝부터의 거리 == 실제로 필요한 거리+
if(relativeX > 0 && relativeX < canvas.width - pWidth){
pX = relativeX;
}
//마우스 x가 캔버스 x 사이에 있다면 마우스 x와 패들 x위치를 일치시킴.
}
function gameOver(){
document.location.reload();
alert('game over!');
game_over = true;
}
function colideWall(){
if(x - r <= 0 || x + r >= canvas.width){//양옆
dx /= Math.abs(dx);
dx *= -5;
}
if(y - r <= 0){//위
dy /= Math.abs(dy);
dy *= -5;
}
else if(y + r >= canvas.height){//아래 == 게임오버
game_over = true;
}
}
function colidePaddle(){
if(pX <= x && x <= pX + pWidth && y + r >= canvas.height - pHeight){
dy = -dy;
}
}
function colideBrick(){
for(let i=0; i<row; i++){
for(let j=0; j<col; j++){
if(bricks[i][j].x <= x && x <= bricks[i][j].x + bW - bWS){
if(bricks[i][j].y <= y && y<= bricks[i][j].y + bH/3){
if(bricks[i][j].exist){
bricks[i][j].exist = false;
dy = -dy;
score++;
}
}
}
}
}
}
function move(){
//이동
x += dx;
y += dy;
//벽과 충돌
colideWall();
//패들과 충돌
colidePaddle();
//벽돌과 충돌
colideBrick();
//패들의 이동
if(pRight && pX + pWidth + 10 <= canvas.width){
pX += 10;
}
if(pLeft && pX - 10 >= 0){
pX -= 10;
}
}
function drawBall(){
scr.beginPath();
scr.fillStyle = 'tomato';
scr.arc(x, y, r, 0, 2 * Math.PI);
scr.fill();
scr.closePath();
}
function drawPaddle(){
scr.beginPath();
scr.fillStyle = 'blue';
scr.rect(pX, canvas.height - pHeight, pWidth, pHeight);
scr.fill();
scr.closePath();
}
function drawBrick(){
for(let i=0; i<row; i++){
for(let j=0; j<col; j++){
if(!bricks[i][j].exist){
continue;
}
scr.beginPath();
scr.fillStyle = 'green';
scr.rect(bricks[i][j].x, bricks[i][j].y, bW - bWS, bH/3);
scr.fill();
scr.closePath();
}
}
}
function drawScore(){
scr.font = '16px';
scr.fillStyle = 'black';
scr.fillText('score: ' + score, 14, 14);
}
function draw(){
scr.clearRect(0, 0, canvas.width, canvas.height);
move();
drawBall();
drawPaddle();
drawBrick();
drawScore();
}
function loop(){
draw();
if(score == row*col){
cancelAnimationFrame(loop);
document.location.reload();
alert("you win!");
}
else if(game_over == true){
gameOver();
}
else{
requestAnimationFrame(loop);//초당 60번씩 loop를 재귀호출해주는 함수.
}
}