example.snake source code

1 module example.snake;
2 
3 version(GAMEEXAMPLE){
4 
5 import gameentity;
6 import gamemap;
7 import game;
8 
9 import nudsfml.graphics;
10 
11 import std.stdio;
12 
13 enum Direction{
14     Up,
15     Down,
16     Left,
17     Right
18 }
19 
20 Vector2f[Direction] dir;
21  
22 class Snake {
23     SnakeEntity[] parts;
24     int len;
25     Direction direction;
26     Vector2i headPosition;
27 
28     float updateTimer = .25;;
29     float updateInterval= .24;
30 
31     int head = -1;
32     int tail = -1;
33     bool doAdd = false;
34 
35     Game g;
36 
37     this(Game game_){
38         dir = [ Direction.Up : Vector2f(0, -1),
39                 Direction.Down : Vector2f(0, 1),
40                 Direction.Left : Vector2f(-1, 0),
41                 Direction.Right : Vector2f(1, 0)];
42         g = game_;
43     }
44 
45     void generate(int length){
46         this.len = len;     
47         for(int i = 0; i < length; i++){
48             auto p = new SnakeEntity(g.map.tex);
49             p.mapLocation = Vector2f(headPosition.x - i, headPosition.y);
50             parts ~= p;
51         }
52 
53         foreach(ref part ; parts){
54             g.map.addSnake(part);
55         }
56 
57         writeln(parts.length);
58 
59         direction = Direction.Right;
60         head = 0;
61         tail = length - 1;
62     }
63 
64 
65     void move(){
66         int id = tail;
67 
68         foreach(i ,ref part ; parts){
69             if(i + 1 < parts.length){
70                 auto next = parts[i+1];
71                 part.mapLocation = next.mapLocation;
72             } else {
73                 part.mapLocation = part.mapLocation + dir[direction];
74             }
75         }
76         
77         g.map.sortEntities;
78     }
79 
80     bool canDirection(Direction dir){
81         if (direction == Direction.Up && dir == Direction.Down)
82             return false;
83         if (direction == Direction.Down && dir == Direction.Up)
84             return false;
85         if (direction == Direction.Left && dir == Direction.Right)
86             return false;  
87         if (direction == Direction.Right && dir == Direction.Left)
88             return false;
89         return true;
90     }
91 
92     void update(float deltaTime){
93         updateTimer -= deltaTime;
94         if(updateTimer < 0){
95             updateTimer = updateInterval;
96             if(g.doMove)
97                 move();
98         }
99     }
100 
101 
102     SnakeEntity addPart(){
103         auto part = new SnakeEntity(g.map.tex);
104         part.parentID = tail;
105         part.mapLocation = parts[parts.length-1].mapLocation;
106         part.id = len;
107         parts ~= part;
108         g.map.addSnake(part);
109         len++;
110         doAdd = false;
111         return part;
112     }
113 
114 
115 }
116 }