main.cpp

00001 // snake made for mbed application board
00002 #include "mbed.h"
00003 #include "C12832_lcd.h"
00004  
00005 #define UP 1
00006 #define DOWN 2
00007 #define LEFT 4
00008 #define RIGHT 8
00009  
00010 C12832_LCD lcd;
00011 
00012 BusIn joystick(p15,p12,p13,p16); //up, down , left, right
00013 
00014 
00015 //globals
00016 int ver[50];
00017 int hor[50];
00018 int tail =1; 
00019 int coinHor =200; //coin x,y coordinates
00020 int coinVer =200;
00021 int ranC = 12; //used for random spwan point
00022 int ranL = 52; //used for random spawn point
00023 int direction= RIGHT;
00024 
00025 //function prototypes
00026 void display(int a);
00027 void control();
00028 void coin();
00029 
00030 int main()
00031 {
00032          hor[0]= 0;
00033          ver[0] = 1;
00034          for (int p = 49; p > 0 ; p--){
00035        hor[p]= 200;
00036        ver[p] = 200;
00037        }//end of for
00038         coin();
00039         while(1){
00040         lcd.cls();
00041         control();
00042         for (int n=0; n<tail; n++){
00043         display(n);
00044         }
00045            wait(0.1);
00046         }
00047 }//end of main
00048 
00049 
00050 void display(int a)
00051 {
00052     //display box
00053     lcd.fillrect(hor[a],ver[a],hor[a]+2,ver[a]+2,1);
00054     //display coin
00055     lcd.fillrect(coinHor,coinVer,coinHor+2,coinVer+2,1);
00056     //check if maximum tail length reached
00057         if (tail>49){ lcd.locate(40,16);
00058     lcd.printf("YOU WIN!");
00059     while(1){}}
00060     
00061 
00062 }//end void display
00063 
00064 
00065 void control(){
00066     //shift boxes position in array
00067    for (int p = 49; p > 0 ; p--){
00068        hor[p]= hor [p-1];
00069        ver[p] = ver [p-1];
00070        }//end of for
00071        
00072        //moves the main box depending on direction
00073         switch (direction){
00074         case RIGHT: if (hor[0]<123){hor[0]+=5;}else{hor[0]=0;}ranC +=2; ranL +=3; break;
00075         case LEFT: if (hor[0]>0){hor[0]-=5;}else{hor[0]=123;}ranC +=3; ranL +=5; break;
00076         case UP: if (ver[0]>0){ver[0]-=5;}else{ver[0]=25;}ranC +=8; ranL +=2; break;
00077         case DOWN: if (ver[0]<25){ver[0]+=5;}else{ver[0]=0;}ranC +=5; ranL +=9; break;
00078             }//end of switch
00079     //change direction if statements
00080     if (joystick == UP)
00081     {if (direction !=DOWN){
00082       direction = UP;
00083       }
00084 
00085     }//end of if UP
00086     
00087     if (joystick == DOWN)
00088     {
00089       if (direction !=UP){
00090       direction = DOWN;}
00091       
00092     }//end of if DOWN
00093     
00094      if (joystick == LEFT)
00095     {
00096       if (direction !=RIGHT){
00097       direction = LEFT;}
00098 
00099     }//end of if LEFT
00100     
00101      if (joystick == RIGHT)
00102     {
00103       if (direction !=LEFT){
00104       direction = RIGHT;}
00105 
00106     }//end of if RIGHT
00107 
00108     //checks if first box hits any other box
00109      for (int p = tail; p > 3 ; p--){
00110          if( hor[0]==hor[p] && ver[0] == ver[p]){
00111              lcd.locate(40,10);
00112             lcd.printf("YOU LOSE!");
00113             lcd.locate(40,20);
00114             lcd.printf("Score: %d",tail);
00115                 while(1){}
00116                 }//end of if
00117              }//end of for
00118 
00119    
00120     //check if first box hits coin, adds tail and moves coin
00121     if (coinHor+5>hor[0] && hor[0]>coinHor-5 && coinVer+5>ver[0] && ver[0] >coinVer-5){
00122         tail++;
00123         coin();
00124     }
00125     }//end of button pressed
00126     
00127 
00128 void coin() {
00129     //changes location of coin
00130     coinVer =  ranC % 25;
00131     coinHor =  ranL % 123;
00132     
00133 }//end void coin