-
Notifications
You must be signed in to change notification settings - Fork 0
/
snake.js
97 lines (87 loc) · 2.42 KB
/
snake.js
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
class Snake{
constructor() {
this.x = board.height/2;
this.y = board.width/2;
this.xAxis = cube;
this.yAxis = 0;
this.score = 1;
this.tail = [];
this.lastX;
this.lastY;
}
update() {
this.x += this.xAxis;
this.y += this.yAxis;
this.checkBorders();
this.updateTail();
return this.endGame();
}
checkBorders() {
if(this.x >= board.width) {
this.x = 0;
} else if(this.x < 0) {
this.x = board.width - cube;
} else if(this.y >= board.height) {
this.y = 0;
} else if(this.y < 0) {
this.y = board.height - cube;
}
}
updateTail() {
for(let i = 0; i < this.tail.length - 1; i++) {
this.tail[i] = this.tail[i+1];
}
this.tail[this.score - 1] = {x : this.x, y : this.y};
}
draw() {
ctx.fillStyle = "#b3ffb3";
for(let i = 0; i < this.tail.length; i++) {
ctx.fillRect(this.tail[i].x, this.tail[i].y, cube , cube);
}
ctx.fillStyle = "#008000";
ctx.fillRect(this.x, this.y, cube , cube);
}
changeDirection(key) {
switch(key) {
case "ArrowUp":
if(this.yAxis !== 0)
break;
this.xAxis = 0;
this.yAxis = -cube;
break;
case "ArrowDown":
if(this.yAxis !== 0)
break;
this.xAxis = 0;
this.yAxis = cube;
break;
case "ArrowRight":
if(this.xAxis !== 0)
break;
this.xAxis = cube;
this.yAxis = 0;
break;
case "ArrowLeft":
if(this.xAxis !== 0)
break;
this.xAxis = -cube;
this.yAxis = 0;
break;
}
}
caught(food) {
if (this.x === food.x && this.y === food.y) {
this.score++;
return true;
}
return false;
}
endGame() {
for(let i = 0; i < this.tail.length - 1; i++) {
if(this.x === this.tail[i].x && this.y === this.tail[i].y) {
return true;
}
}
return false;
}
}