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
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
<!DOCTYPE html>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8">
<TITLE>Jumps</TITLE>
<html><head><link rel="stylesheet" href="../styles.css"></head>
<body onkeydown="keydown(event)" onblur="needPause()" onload="startGame()">
<div class="topnav" id="myTopnav"></div><div class="main">
<h2>"Jumps"</h2>
<p>Max result: <span id="hiscore">0</span>.</p>
<canvas id="myCanvas" width="500" height="400" onmousedown="mousedown(event)" onmouseup="accelerate(0.05)">
Your browser does not support the HTML5 canvas tag.</canvas></div>
<script type="text/javascript" src="../accordion.js"></script>
<script>
var ctx;
var width = 500;
var height = 300;
var obstacles = [];
var bX, bY, vX, vY;
var gravity;
var time;
var interval;
var hiscore = 0;
var paused = 0;
var finished = 0;
const bR=15;
const minGap = 50;
const maxGap = 200;
function startGame()
{
ctx = document.getElementById("myCanvas").getContext("2d");
ctx.lineCap="round";
vX = 0; bX = bR;
vY = 0; bY = height/2;
gravity = 0.05; time = 0;
paused = 0; finished = 0;
obstacles = [];
hiscore = localStorage.getItem("hiscoreJumps");
if(!hiscore) hiscore = 0;
document.getElementById("hiscore").innerHTML = hiscore;
ctx.clearRect(0, 0, width, height);
interval = setInterval(updateCanvas, 20);
}
function finish(score) // game over
{
finished = 1; draw();
ctx.font="40px Arial";
ctx.fillStyle = 'black';
ctx.fillText("GAME OVER", width/4, height/2);
if(score > hiscore)
{ hiscore = score;
localStorage.setItem("hiscoreJumps", hiscore); }
document.getElementById("hiscore").innerHTML = hiscore;
clearInterval(interval);
}
function updateCanvas()
{
if(paused) { draw(); return; }
// check crashes
for(var i = 0; i < obstacles.length; i += 1)
if(crash(obstacles[i])) { finish(time); return; }
time = time + 1;
if(time%100==0) // new obstacle(s)
{
if(Math.random()<0.5) // one obstacle
{
var y1 = Math.floor(Math.random()*(maxGap-minGap)+minGap);
var y2 = height - Math.floor(Math.random()*(maxGap-minGap)+minGap);
if(y2<y1) { var y=y1; y1=y2; y2=y; }
if(y2<y1+bR) { y2 += bR; y1 -= bR; }
obstacles.push([width,y1,y2]);
}
else // 2 obstacles (one hole)
{
var gap = Math.floor(Math.random()*(maxGap-minGap)+minGap);
var y0 = Math.floor(Math.random()*height);
var y1 = y0-gap/2, y2 = y0+gap/2;
if(y1 > bR/2)
obstacles.push([width,0,y1]);
if(y2 < height-bR/2)
obstacles.push([width,y2,height]);
}
}
// move ball
bX += vX; bY += vY; vY += gravity;
// check boundaries
if(bX < bR) { bX = bR; vX = 0; }
if(bX > width-bR) { bX = width-bR; vX = 0; }
if(bY < bR) { bY = bR; vY = 0; }
if(bY > height-bR) { bY = height-bR; vY = 0; }
// move obstacles
for (var i = 0;i < obstacles.length; i += 1) obstacles[i][0] -= 1;
// draw it
draw();
}
function draw()
{
cwidth = ctx.canvas.width;
cheight = ctx.canvas.height;
var s = cwidth/width;
ctx.clearRect(0, 0, cwidth, cheight);
ctx.strokeStyle = 'black';
ctx.strokeRect(0, 0, s*width, s*height);
ctx.font="12px Arial"; // score
text = "SCORE: " + time;
ctx.fillStyle = 'black';
ctx.fillText(text, 2*bR*s, bR*s);
var x = bX*s, y = bY*s, r = bR*s; // ball
var grd=ctx.createRadialGradient(x-0.3*r,y-r/5,r/10,x,y,r);
grd.addColorStop(0,"white");
grd.addColorStop(1,"red");
ctx.beginPath(); ctx.fillStyle = grd;
ctx.arc(x, y, r, 0, 2*Math.PI); ctx.fill();
ctx.fillStyle = 'green'; // obstacles
for (var i = 0;i < obstacles.length; i += 1)
{
var o = obstacles[i];
ctx.fillRect((o[0]-bR/10)*s, o[1]*s, bR/5*s, (o[2]-o[1])*s);
}
if(cheight > s*height) // buttons
{
var dh = cheight - s*height, b = dh/10;
var y0 = b+s*height, x0 = s*width/3;
if(gravity<0) // button Up
{
ctx.fillStyle = 'lightblue';
ctx.fillRect(b, y0, x0-2*b, dh-2*b);
}
ctx.strokeStyle = 'blue';
ctx.strokeRect(b, y0, x0-2*b, dh-2*b);
ctx.beginPath(); ctx.fillStyle = 'blue';
ctx.moveTo(x0/4,y0-b+3*dh/4);
ctx.lineTo(3*x0/4,y0-b+3*dh/4);
ctx.lineTo(x0/2,y0-b+dh/4); ctx.fill();
if(finished) // button New
{
ctx.strokeStyle = 'red';
ctx.strokeRect(b+x0, y0, x0-2*b, dh-2*b);
ctx.beginPath(); ctx.fillStyle = 'red';
ctx.moveTo(x0+x0/4,y0-b+dh/4);
ctx.lineTo(x0+x0/4,y0-b+3*dh/4);
ctx.lineTo(x0+x0/2,y0-b+dh/2); ctx.fill();
ctx.moveTo(x0+x0/2,y0-b+dh/4);
ctx.lineTo(x0+x0/2,y0-b+3*dh/4);
ctx.lineTo(x0+3*x0/4,y0-b+dh/2); ctx.fill();
}
else // button Pause
{
if(paused)
{
ctx.fillStyle = 'pink';
ctx.fillRect(b+x0, y0, x0-2*b, dh-2*b);
}
ctx.strokeStyle = 'red';
ctx.strokeRect(b+x0, y0, x0-2*b, dh-2*b);
ctx.beginPath(); ctx.fillStyle = 'red';
ctx.rect(x0+x0/4,y0-b+dh/4,x0/8,dh/2);
ctx.rect(x0+5*x0/8,y0-b+dh/4,x0/8,dh/2);
ctx.fill();
}
if(gravity>0.05) // button Down
{
ctx.fillStyle = 'palegreen';
ctx.fillRect(2*x0+b, y0, x0-2*b, dh-2*b);
}
ctx.strokeStyle = 'green';
ctx.strokeRect(2*x0+b, y0, x0-2*b, dh-2*b);
ctx.beginPath(); ctx.fillStyle = 'green';
ctx.moveTo(2*x0+x0/4,y0-b+dh/4);
ctx.lineTo(2*x0+3*x0/4,y0-b+dh/4);
ctx.lineTo(2*x0+x0/2,y0-b+3*dh/4); ctx.fill();
}
}
function crash(o) // return 1 if crash on an obstacle
{
const xx = o[0], y1 = o[1], y2 = o[2];
if((bX-xx)*(bX-xx)+(bY-y1)*(bY-y1)<=bR*bR) return 1;
if((bX-xx)*(bX-xx)+(bY-y2)*(bY-y2)<=bR*bR) return 1;
if(Math.abs(bX-xx)<=bR && bY>y1 && bY<y2) return 1;
return 0;
}
function accelerate(n)
{
gravity = n;
}
function keydown(event) // key is pressed
{
if(event.key == 'ArrowUp' || event.key == ' ') gravity = -0.2;
else if(event.key == 'ArrowDown') gravity = 0.2;
else gravity = 0.05;
}
function mousedown(event) // mouse button is pressed (default Up)
{
cwidth = ctx.canvas.width;
cheight = ctx.canvas.height;
var s = cwidth/width;
if(event.offsetY>s*height && event.offsetX>cwidth*2/3)
gravity = 0.2;
else if(event.offsetY>s*height && event.offsetX>cwidth/3)
{
if(finished) startGame();
else paused = 1-paused;
}
else gravity = -0.2;
}
function pause() // useless
{
paused = 1-paused;
}
</script>
</body>
</html>
|
