-
Notifications
You must be signed in to change notification settings - Fork 0
/
game.html
188 lines (143 loc) · 4.09 KB
/
game.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
<html>
<canvas id= "gameCanvas" width="800" height="600" ></canvas>
<script>
var canvas;
var canvasContext;
var ballX = 50;
var ballSpeedX = 10;
var ballY = 50;
var ballSpeedY = 10;
var player1Score = 0;
var player2Score = 0;
const Winning_Score = 3;
var showingWinScreen = false;
var paddle1Y = 250 ;
var paddle2Y = 250 ;
const PADDLE_HEIGHT = 100;
const PADDLE_THICKNESS= 10;
function calculateMousePos(evt){
var rect = canvas.getBoundingClientRect();
var root = document.documentElement;
var mouseX = evt.clientX - rect.left - root.scrollLeft;
var mouseY = evt.clientY - rect.top - root.scrollTop;
return{
x:mouseX,
y:mouseY
};
}
function handleMouseClick (evt) {
if (showingWinScreen) {
player1Score = 0;
player2Score = 0;
showingWinScreen = false ;
}
}
window.onload = function() {
canvas = document.getElementById('gameCanvas');
canvasContext = canvas.getContext('2d');
var FPS = 30;
setInterval(callBoth, 1000/FPS);
canvas.addEventListener('mousedown', handleMouseClick) ;
canvas.addEventListener('mousemove',
function(evt){
var mousePos = calculateMousePos(evt);
paddle1Y = mousePos.y - (PADDLE_HEIGHT/2);
});
}
function callBoth(){
moveEverything();
drawEverything();
}
function ballReset() {
if (player1Score >= Winning_Score ||
player2Score >= Winning_Score) {
showingWinScreen = true;
}
ballSpeedX = -ballSpeedX ;
ballX = canvas.width/2;
ballY = canvas.height/2;
}
function computermovement () {
var paddle2YCenter = paddle2Y + (PADDLE_HEIGHT/2);
if (paddle2YCenter < ballY - 35) {
paddle2Y += 6;
}
else if (paddle2YCenter > ballY - 35) {
paddle2Y -= 6;
}
}
function moveEverything() {
if (showingWinScreen) {
return;
}
computermovement () ;
ballX += ballSpeedX ;
ballY += ballSpeedY ;
if(ballX < 0 ){
if(ballY >paddle1Y &&
ballY < paddle1Y + PADDLE_HEIGHT ) {
ballSpeedX = -ballSpeedX ;
var deltaY = ballY - (paddle1Y - PADDLE_HEIGHT/2) ;
} else {
player2Score ++; // must be before ball ballReset
ballReset ();
}
}
if(ballY < 0 ){
ballSpeedY = -ballSpeedY ;
}
if(ballX > canvas.width ){
if(ballY >paddle2Y &&
ballY < paddle2Y + PADDLE_HEIGHT ) {
ballSpeedX = -ballSpeedX ;
var deltaY = ballY - (paddle2Y - PADDLE_HEIGHT/2) ;
} else {
player1Score ++; // must be before ball ballReset
ballReset ();
}
}
if(ballY > canvas.height ){
ballSpeedY = -ballSpeedY ;
}
}
//next function draws the net
function drawNet() {
for(var i=0;i<canvas.height;i+=40) {
canvasContext.fillStyle = 'orange';
canvasContext.fillRect(canvas.width/2-1,i,2,20);
}
}
function drawEverything (){
//next line blanks out the screen with black
canvasContext.fillStyle = 'black';
canvasContext.fillRect(0,0,canvas.width,canvas.height);
if (showingWinScreen) {
canvasContext.fillStyle = "white " ;
if (player1Score >= Winning_Score) {
canvasContext.fillText("WOOHOO YOU WON !!" ,350 , 200);
}
else if (player2Score >= Winning_Score) {
canvasContext.fillText("COMPUTER WON._." ,350 , 200);
}
canvasContext.fillStyle = 'blue';
canvasContext.fillText("CLICK TO PLAY AGAIN ", 350, 500);
return;
}
drawNet() ;
//next line is the left blue paddle
canvasContext.fillStyle = 'green';
canvasContext.fillRect(0,paddle1Y,PADDLE_THICKNESS,PADDLE_HEIGHT);
//next line is the right computer paddle
canvasContext.fillStyle = 'blue';
canvasContext.fillRect(canvas.width - PADDLE_THICKNESS,paddle2Y,PADDLE_THICKNESS,PADDLE_HEIGHT);
//next line is the ball
canvasContext.fillStyle = 'yellow';
canvasContext.beginPath();
canvasContext.arc(ballX,ballY, 10, 0,Math.PI*2,true);
canvasContext.fill();
canvasContext.fillText("SCORE",380,33);
canvasContext.fillText(player1Score,100,100);
canvasContext.fillText(player2Score,canvas.width - 100, 100);
}
</script>
</html>