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Dependencies:   mbed

snake_engine/snake_engine.cpp@20:980b37fde361, 2018-05-08 (annotated)

Committer:
weiway
Date:
Tue May 08 13:41:08 2018 +0000
Revision:
20:980b37fde361
Parent:
18:e58a1f8e72ad
Child:
21:7f7d09a27cc8
adding doxygen documentation , comments and references

Who changed what in which revision?

UserRevisionLine numberNew contents of line
weiway 13:4026781772cb 1 #include "snake_engine.h"
weiway 12:d45bc5d878ad 2
weiway 12:d45bc5d878ad 3 snake_engine::snake_engine()
weiway 12:d45bc5d878ad 4 {
weiway 20:980b37fde361 5 clision = 0;// 0 means there is no collision
weiway 12:d45bc5d878ad 6 }
weiway 12:d45bc5d878ad 7
weiway 12:d45bc5d878ad 8 snake_engine::~snake_engine()
weiway 12:d45bc5d878ad 9 {
weiway 12:d45bc5d878ad 10 }
weiway 12:d45bc5d878ad 11
weiway 13:4026781772cb 12 void snake_engine::init()
weiway 12:d45bc5d878ad 13 {
weiway 12:d45bc5d878ad 14 s.init();
weiway 12:d45bc5d878ad 15
weiway 12:d45bc5d878ad 16 }
weiway 20:980b37fde361 17 //draw the snake , fruit , and point
weiway 13:4026781772cb 18 void snake_engine::draw(N5110 &lcd)
weiway 12:d45bc5d878ad 19 {
weiway 12:d45bc5d878ad 20 lcd.refresh();
weiway 12:d45bc5d878ad 21 lcd.clear();
weiway 20:980b37fde361 22 lcd.drawRect(0,8,WIDTH ,HEIGHT -8,FILL_TRANSPARENT); // the squre on the screen
weiway 12:d45bc5d878ad 23
weiway 12:d45bc5d878ad 24 s.draw(lcd);
weiway 12:d45bc5d878ad 25 f.draw(lcd);
weiway 15:47ea86f1ed70 26 printpoint(lcd);
weiway 12:d45bc5d878ad 27 }
weiway 12:d45bc5d878ad 28
weiway 15:47ea86f1ed70 29
weiway 20:980b37fde361 30 void snake_engine::update(Gamepad &pad, N5110 &lcd)//update the game
weiway 12:d45bc5d878ad 31 {
weiway 20:980b37fde361 32 s.update(_d,_mag); //update direction of snake
weiway 20:980b37fde361 33 collision(pad, lcd);//update collision
weiway 15:47ea86f1ed70 34
weiway 12:d45bc5d878ad 35
weiway 20:980b37fde361 36 if(getfruit(pad)) {//boolean value. return ture and false
weiway 20:980b37fde361 37 f.reborn(); //reborn randomly the fruit when the old fruit is ate by snake
weiway 20:980b37fde361 38 s.point(); //update the point
weiway 15:47ea86f1ed70 39
weiway 12:d45bc5d878ad 40 }
weiway 12:d45bc5d878ad 41 }
weiway 12:d45bc5d878ad 42
weiway 20:980b37fde361 43 //read the command from gamepad. From Pong sample code
weiway 13:4026781772cb 44 void snake_engine::read_input(Gamepad &pad)
weiway 13:4026781772cb 45 {
weiway 13:4026781772cb 46 _d = pad.get_direction();
weiway 13:4026781772cb 47 _mag = pad.get_mag();
weiway 13:4026781772cb 48 }
weiway 12:d45bc5d878ad 49
weiway 12:d45bc5d878ad 50
weiway 20:980b37fde361 51 bool snake_engine::getfruit(Gamepad &pad)//boolean function. if the snake eat fruit . returns true, else false.
weiway 15:47ea86f1ed70 52 {
weiway 15:47ea86f1ed70 53 Vector2D _f_pos = f.get_pos();
weiway 15:47ea86f1ed70 54 Vector2D _s_pos = s.get_pos();
weiway 15:47ea86f1ed70 55
weiway 15:47ea86f1ed70 56 if ((_f_pos.y >= _s_pos.y || _f_pos.y == _s_pos.y-1) &&
weiway 15:47ea86f1ed70 57 (_f_pos.y <= _s_pos.y || _f_pos.y+1 == _s_pos.y-1) &&
weiway 15:47ea86f1ed70 58 (_f_pos.x >= _s_pos.x || _f_pos.x+1 >= _s_pos.x || _f_pos.x+1 >= _s_pos.x ) &&
weiway 15:47ea86f1ed70 59 (_f_pos.x <= _s_pos.x || _f_pos.x+1 <= _s_pos.x)) {
weiway 15:47ea86f1ed70 60
weiway 15:47ea86f1ed70 61 return true;
weiway 15:47ea86f1ed70 62 } else {
weiway 15:47ea86f1ed70 63 return false;
weiway 15:47ea86f1ed70 64 }
weiway 15:47ea86f1ed70 65 }
weiway 15:47ea86f1ed70 66
weiway 15:47ea86f1ed70 67
weiway 20:980b37fde361 68 //lcd print the point
weiway 15:47ea86f1ed70 69 void snake_engine::printpoint(N5110 &lcd)
weiway 15:47ea86f1ed70 70 {
weiway 20:980b37fde361 71 int snakepoint = s.get_point();// from the snake function, get the points
weiway 15:47ea86f1ed70 72 char buffer[14];
weiway 15:47ea86f1ed70 73 sprintf(buffer,"%2d",snakepoint);
weiway 20:980b37fde361 74 lcd.printString(buffer,WIDTH/2 - 40,0); //print the point on the left top corner on the screen
weiway 15:47ea86f1ed70 75 }
weiway 15:47ea86f1ed70 76
weiway 17:7c8cf5f7878c 77
weiway 17:7c8cf5f7878c 78
weiway 17:7c8cf5f7878c 79
weiway 20:980b37fde361 80 void snake_engine::collision(Gamepad &pad,N5110 &lcd)//check whether the snake hit the wall or not.
weiway 17:7c8cf5f7878c 81 {
weiway 17:7c8cf5f7878c 82 Vector2D _s_poss = s.get_pos();
weiway 17:7c8cf5f7878c 83 if (((_s_poss.x >= WIDTH -2) || (_s_poss.x <= 1)) ||((_s_poss.y >= HEIGHT -1) || (_s_poss.y <= 8)) ) {
weiway 18:e58a1f8e72ad 84 lcd.clear();
weiway 20:980b37fde361 85 clision = 1;//if the snake position on X and Y equal to the wall. then it happens. clision = 1.
weiway 17:7c8cf5f7878c 86 }
weiway 17:7c8cf5f7878c 87
weiway 17:7c8cf5f7878c 88 }
weiway 17:7c8cf5f7878c 89
weiway 17:7c8cf5f7878c 90
weiway 17:7c8cf5f7878c 91