Implement a Snake Game in VxWorks

/* <Br/> ********************************** * copyright (c) * ****************************** <br/> * <br/> * ----------------------------------------------------------------------------- <br/> * File Name: snake. c <br/> * file Description: Snake <br/> * Author: Wu Yulin, victorywyl@126.com <br/> * creation date: <br/> * compiling environment: <br/> * hardware environment: S3C2410A (32 bit ARM920T RISC core from Samsung) <br/> *-------------------------- Modified <br/> * ---------------------------------- modification record --------------------------------- <br/> * modifier: None <br/> * modification date: none <br/> * description: none <br/> * others <br/> ***************************** **************************************** * ********** <br/> */</P> <p>/* includ Es */</P> <p> # include <VxWorks. h> </P> <p> # include <tasklib. h> </P> <p> # include <wdlib. h> </P> <p> # include <syslib. h> </P> <p> # include <stdio. h> </P> <p> # include <stdlib. h> </P> <p> # include <msgqlib. h> </P> <p> # include <loglib. h> </P> <p> # include ".. /.. /headers/usrdatatype. H "</P> <p> # include ".. /.. /headers/keyboard. H "</P> <p> # include ".. /.. /headers/guibasicdrv. H "</P> <p>/* macros */<br/> /********************* ********* * ***** <Br/> * using flyleft take place left <br/> * using flyright take place right <br/> * using "Sen" take place up <br/> * using "copy" take place down <br/> * using "exit" take place ESC <br/> *************** * *******************/</P> <p> # define left 51 </P> <p> # define right 34 </P> <p> # define up 2 </P> <p> # define down 4 </P> <p> # define ESC 9 </P> <p> # define color_grass (31> 1) <6) </P> <p> # define color_black 0x0000 </P> <p> # define color_white 0 xfffe </P> <p> # define color_blue 0x003e </P> <p> # define N 200 </P> <p>/* global variables */</P> <p> int I, j, K, key = 0; </P> <p> int score = 0;/* score */</P> <p> int task1, task2; </P> <p>/* structure of food */</P> <p> struct food <br/> {<br/> int X; /* horizontal coordinates of food */</P> <p> int y;/* Y coordinates of food */</P> <p> int yes; /* variable used to determine whether food is expected */</P> <p>} food; </P> <p>/* snake struct */</P> <p> struct snake <br/> {<br/> int X [N]; </P> <p> int y [N]; </P> <p> int node;/* Number of snake nodes */</P> <p> int direction; /* snake movement direction */</P> <p> int life;/* snake life, 0 active, 1 dead */</P> <p>} snake; </P> <p>/* functiond forward declarations function declaration */</P> <p> void Init (void ); /* initialize the keyboard drive and display of the target machine */</P> <p> void close (void ); /* disable display */</P> <p> void drawk (void);/* game Start Screen */</P> <p> void gameover (void ); /* game end */</P> <p> void gameplay (void);/* Specific game process */</P> <p> void move (void ); </P> <p> void prscore (void);/* print Home score */</P> <p> void keyhandle (void);/* direction in the direction of snake movement */</P> <p> void generatefood (void ); /* whether food is generated */</P> <p> extern void taskbeep (void); </P> <p> extern void BEEP (INT freq, int ticks ); </P> <p> extern void gui_init (void); </P> <p> extern void gui_putbutton (INT x0, int y0, int wide, int High, int8u * Name); </P> <p> extern void gui_botton (INT x0, int y0, int wide, int high, int8u * Name, int16u color ); </P> <p> extern void LCD _ Putpixel (int x, int y, int16u color ); </P> <p>/* entry of the whole code program entry point */</P> <p> void entry_snake (void) </P> <p >{</P> <p> Init (); </P> <p> drawk (); </P> <p> taskspawn ("tbeep", 90, 0,500, (funcptr) taskbeep ); </P> <p> task1 = taskspawn ("maintask", 95, 0, 20000, (funcptr) gameplay ); </P> <p> task2 = taskspawn ("keytask", 95, 0, 20000, (funcptr) Move, 0 ); </P> <P >}</P> <p>/* Other functions */</P> <p> void Init (void) <br/>{< br/> If (keyinit () = Error) </P> <p> logmsg ("keyboard initialization failed... ", 0, 0, 0, 0, 0); </P> <p> gui_init (); </P> <p> LCD _turnon (); </P> <p> BEEP (2000, sysclkrateget () * 2); </P> <p >}</P> <p> void drawk (void) <br/>{</P> <p> LCD _fillcolor (color_black);/* set the background color */</P> <p> for (I = 100; I <700; I + = 10)/* draw the background wall */</P> <p> {Gu I _putbutton (I, 60,10, 10, ""); </P> <p> gui_putbutton (I, 500,10, 10 ,""); </P> <p >}</P> <p> for (I = 70; I <500; I + = 10) </P> <p> {gui_putbutton (100, I, 10, 10, ""); </P> <p> gui_putbutton (690, I, 10, 10 ,""); </P> <p >}</P> <p> food. yes = 1;/* 1 indicates that new food needs to appear, and 0 indicates that a food already exists */</P> <p> snake. life = 0;/* live */</P> <p> snake. direction = down;/* direction to right */</P> <p> snake. X [0] = 200; snake. Y [0] = 100;/* snake header */</P> <p> snake. X [1] = 190; snake. Y [1] = 100; </P> <p> snake. node = 2; </P> <p> generatefood (); </P> <p >}</P> <p> void generatefood (void) <br/>{</P> <p> If (food. yes = 1) </P> <p >{< br/> food. X = rand () % 400 + 100; </P> <p> food. y = rand () % 350 + 80; </P> <p> while (food. X % 10! = 0)/* after a random occurrence of a food, the food must be in the whole grid so that the snake can eat */</P> <p> food. X ++; </P> <p> while (food. Y % 10! = 0) </P> <p> food. Y ++; </P> <p> for (j = food. x; j <(food. x) + 10; j ++)/* draw food */</P> <p> for (k = food. y; k <(food. y) + 10; k ++) </P> <p> {LCD _putpixel (j, k, color_blue) ;}</P> <p> food. yes = 0; /* food on the screen */</P> <p >}</P> <p> void close (void) <br/>{</P> <p> LCD _turnoff (); </P> <p >}</P> <p> void gameover (void) <br/>{</P> <p> puts ("game over... "); </P> <p >}</P> <p> void gameplay (void) <br/>{</P> <p> while (1) <br/>{</P> <p> while (Key = = 0)/* the snake moves its own body without a button */<br/> {</P> <p> generatefood (); </P> <p> for (I = snake. node-1; I> 0; I --)/* each step of the snake moves forward, that is, the key algorithm of the snake */<br/> {<br/> snake. X [I] = snake. X [I-1]; </P> <p> snake. Y [I] = snake. Y [I-1]; <br/>}</P> <p> switch (snake. direction) <br/>{< br/> case right: Snake. X [0] + = 10; break; </P> <p> case left: Snake. X [0]-= 10; break; </P> <p> case up: Snake. Y [0]-= 10; break; </P> <p> case down: Snake. Y [0] + = 10; break; </P> <p>} </P> <p>/* collision detection */</P> <p> for (I = 3; I <snake. node; I ++)/* judge whether the snake hits itself from the fourth section of the snake, because the snake header is two sections, section 3 cannot be transferred */<br/> {<br/> If (snake. X [I] = snake. X [0] & snake. Y [I] = snake. Y [0]) <br/>{< br/> gameover ();/* display failed */</P> <p> snake. life = 1; </P> <p> break; <br/>}</P> <p> If (snake. X [0] <110 | snake. X [0]> 690 | snake. Y [0] <70 | snake. Y [0]> 490)/* Whether the snake hits the wall */<br/> {<br/> gameover (); /* this game ends */</P> <p> snake. life = 1;/* snake dead */</P> <p >}</P> <P> If (snake. life = 1)/* after the above two judgments, if the snake dies, it will jump out of the inner loop and start again */</P> <p> break; </P> <p> If (snake. X [0] = food. X & snake. Y [0] = food. y)/* after eating food */</P> <p >{< br/> snake. X [Snake. node] =-20; snake. Y [Snake. node] =-20;/* the new section is placed in an invisible position, and the position of the previous section is obtained in the next loop */</P> <p> snake. node ++;/* the length of the snake's body */</P> <p> food. yes = 1;/* new food needs to appear on the screen */</P> <p> score + = 10; </P> <p> prscore (); /* output new score */<br/>}</P> <p> for (I = 0; I <snake. node; I ++)/* draw a snake */</P> <p> {gui_putbutt On (snake. X [I], Snake. Y [I], 10, 10, ""); </P> <p> taskdelay (sysclkrateget ()/10 ); </P> <p >}</P> <p> for (j = snake. X [Snake. node-1]; j <(snake. X [Snake. node-1] + 10); j ++) </P> <p> for (k = snake. Y [Snake. node-1]; k <snake. Y [Snake. node-1] + 10; k ++) </P> <p> {LCD _putpixel (j, k, color_black) ;}</P> <p> key = 0; </P> <p >}/ * endwhile (Key = 0) */</P> <p> If (snake. life = 1)/* jump out of the loop if the snake dies */</P> <p> break; </P> <p >}/ * endwhile (1) */</P> <p >}</P> <p> Void move (void) <br/>{< br/> while (1) </P> <p> {key = keygetvalue (); </P> <p> tasksuspend (task1); </P> <p> keyhandle (); </P> <p> taskresume (task1 ); <br/>}</P> <p> void keyhandle (void) </P> <p >{</P> <p> If (Key = up & snake. direction! = Down)/* determine whether to move in the opposite direction */</P> <p> snake. direction = up; </P> <p> else </P> <p> If (Key = Right & snake. direction! = Left) </P> <p> snake. Direction = right; </P> <p> else <br/> If (Key = left & snake. direction! = Right) </P> <p> snake. direction = left; </P> <p> else </P> <p> If (Key = down & snake. direction! = Up) </P> <p> snake. direction = down; </P> <p >}</P> <p> void prscore (void) <br/>{</P> <p> logmsg ("your current score is % d/N", score, 0 ); </P> <p >}</P> <p>