-
Notifications
You must be signed in to change notification settings - Fork 1
/
Copy pathlesson2.html
197 lines (175 loc) · 4.05 KB
/
lesson2.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Gamedev Canvas Workshop</title>
<style>
* { padding: 0; margin: 0; }
canvas { background: #eee; display: block; margin: 0 auto; }
</style>
</head>
<body>
<canvas id="myCanvas" width="480" height="320"></canvas>
<script>
var canvas= document.getElementById("myCanvas");
var ctx= canvas.getContext("2d");
//positionning ball
var x = canvas.width/2;
var y = canvas.height-30;
var dx = 2;
var dy = -2;
//ball characs
var ballRadius = 10;
var r=0;
var g=110;
var b=0;
var color = "rgb("+r+","+g+","+b+")";
//paddle chars
var paddleHeight= 10;
var paddleWidth = 60;
var paddleX=(canvas.width-paddleWidth)/2;
//keyboard listeners
var rightPressed=false;
var leftPressed = false;
//Bricks
var brickRowCount = 3;
var brickColumnCount = 5;
var brickWidth = 75;
var brickHeight = 20;
var brickPadding = 10;
var brickOffsetTop = 30;
var brickOffsetLeft = 30;
var bricks = [];
for(c=0;c<brickColumnCount;c++){
bricks[c]=[];
for(r=0;r<brickRowCount;r++){
bricks[c][r] = {x:0,y:0,status:1};
}}
//SCORE
var score = 0;
function drawBall(){
ctx.beginPath();
ctx.arc(x,y,ballRadius,0,Math.PI*2,true);
ctx.fillStyle=color;
ctx.fill();
ctx.closePath();}
function drawPaddle(){
ctx.beginPath();
ctx.rect(paddleX, canvas.height-paddleHeight, paddleWidth, paddleHeight);
ctx.fillStyle = "#0095DD";
ctx.fill();
ctx.closePath();}
function drawBricks(){
for(c=0;c<brickColumnCount;c++){
for(r=0;r<brickRowCount;r++){
if(bricks[c][r].status==1){
var brickX = c*(brickWidth+brickPadding)+brickOffsetLeft;
var brickY = r*(brickHeight+brickPadding)+brickOffsetTop;
bricks[c][r].x = brickX;
bricks[c][r].y = brickY;
ctx.beginPath();
ctx.rect(brickX,brickY,brickWidth,brickHeight);
ctx.fillStyle = 'red';
ctx.fill();
ctx.closePath();
}}
}}
function drawScore(){
ctx.font = "16px Arial";
ctx.fillstyle="#0095DD";
ctx.fillText("Score: " + score, 8, 20);
}
function randColor(){
r=Math.floor(Math.random()*256);
g=Math.floor(Math.random()*256);
b=Math.floor(Math.random()*256);
return "rgb("+r+","+g+","+b+")";}
function paddleLogic(){
if(rightPressed && paddleX<canvas.width-paddleWidth){
paddleX+=7;
}
else if(leftPressed && paddleX>0){
paddleX-=7;
}}
function ballLogic(){
if(y+dy<0){
dy=-dy;
color=randColor();
}
else if(y+dy>canvas.height-ballRadius){
if(x>paddleX&&x<paddleX+paddleWidth){
dy=-dy;
color = randColor();
}
else{
alert("GAME OVER");
document.location.reload();
}
}
if(x + dx > canvas.width-ballRadius || x + dx < 0) {
dx = -dx;
r=Math.floor(Math.random()*256);
g=Math.floor(Math.random()*256);
b=Math.floor(Math.random()*256);
color = "rgb("+r+","+g+","+b+")";
}
}
function collisionDetection() {
for(c=0; c<brickColumnCount; c++) {
for(r=0; r<brickRowCount; r++) {
var b = bricks[c][r];
if(x > b.x && x < b.x+brickWidth && y > b.y && y < b.y+brickHeight &&b.status==1) {
dy = -dy;
b.status =0;
score++;
}
}
}
}
function winDetection(){
if(score==brickRowCount*brickColumnCount){
alert("You win, congrats!");
document.location.reload();
}
}
function draw() {
winDetection();
ctx.clearRect(0,0,canvas.width,canvas.height);
drawScore();
drawBricks();
drawBall();
drawPaddle();
paddleLogic();
ballLogic();
collisionDetection();
x+=dx;
y+=dy;
requestAnimationFrame(draw);
}
document.addEventListener("keydown",keyDownHandler, false);
document.addEventListener("keyup",keyUpHandler, false);
document.addEventListener("mousemove",mouseMoveHandler, false);
function keyDownHandler(e){
if(e.keyCode ==39){
rightPressed=true;
}
else if(e.keyCode == 37){
leftPressed=true;
}}
function keyUpHandler(e){
if(e.keyCode ==39){
rightPressed=false;
}
else if(e.keyCode == 37){
leftPressed=false;
}}
function mouseMoveHandler(e){
var relativeX = e.clientX - canvas.offsetLeft;
if(relativeX>0 && relativeX<canvas.width){
paddleX = relativeX - paddleWidth/2;
}
}
draw();
</script>
</body>
</html>