snake source code

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