C # Snake Game-logic layer (3)

At the logic layer, we need to analyze the rules of the game: whether the snake can crawl, whether to eat food, whether to generate new food, whether the game ends, points rules, and so on.

There are currently two forms of snake death: hitting the wall and biting yourself :(

Prerequisite for producing new food: A snake eats food and generates new coordinates at random (new coordinates! = Snake body [N]).

Gamelogic. CS

Public class gamelogic <br/>{< br/> /// <summary> <br/> /// snail ke_init_lengh: Default length of a snake <br/> /// snail ke_init_direction: default crawling direction of the snake <br/> /// </Summary> <br/> Public const int snakke_init_lengh = 3; <br/> Public const snkedirection snke_init_direction = snkedirection. right; <br/> private snake; <br/> Private food; <br/> // game scenario <br/> private system. windows. forms. panel; <br/> private graphics g; <br/> private solidbrush backbrush; <br/> private bool gameover = false; <br/> Public int backwidth; <br/> Public int backheight; </P> <p> private point objfoodpoint <br/> {<br/> get {return food. point ;}< br/> set {food. point = value ;}< br/>}< br/> private point newsnkehead <br/>{< br/> get {return snake. point ;}< br/> set {snake. point = value ;}< br/>}< br/> Public snkedirection <br/>{< br/> get {return snake. snkedirection;} <br/> set {snake. snail kedirection = value ;}< br/>}< br/> Public bool gameover <br/>{< br/> get {return gameover ;} <br/>}</P> <p> // constructor, instantiated object <br/> Public gamelogic (system. windows. forms. panel P, int W, int h) <br/>{< br/> This. panel = P; <br/> backwidth = W; <br/> backheight = H; <br/> snake = new snake (snak_init_lengh, snak_init_direction, backwidth, backheight ); <br/> food = new food (); <br/>}</P> <p> // initial game screen <br/> Public void initgame () <br/> {<br/> G = panel. creategraphics (); <br/> backbrush = new solidbrush (panel. backcolor); <br/> snake. drawsnake (g); <br/> createfood (); <br/>}</P> <p> // clear the game screen <br/> Public void crearall () <br/> {<br/> foreach (point in snake. snake) <br/> snake. crear (G, backbrush, point); <br/> food. crear (G, backbrush, objfoodpoint); <br/>}</P> <p> // snake movement <br/> Public void snkemove () <br/>{< br/> point newpoint = new point (); <br/> If (snake. iscanmove (ref newpoint) <br/>{< br/> newsnkehead = newpoint; <br/> snake. drawhead (g); <br/> If (iseatfood (objfoodpoint) <br/>{< br/> createfood (); <br/>}< br/> else <br/> {<br/> snake. crear (G, backbrush, Snake. snail kepoints [Snake. snail kepoints. count-1]); <br/> snake. snail kepoints. remove (snake. snail kepoints [Snake. snail kepoints. count-1]); <br/>}< br/> else <br/>{< br/> gameover = true; <br/>}< br/> If (ishitoneself () <br/> gameover = true; <br/>}</P> <p> // snake food <br/> Public bool iseatfood (point) <br/> {<br/> If (point = snake. snail kepoints [0]) <br/>{< br/> return true; <br/>}< br/> return false; <br/>}</P> <p> // a food with random coordinates is generated when it is eaten. <br/> Public void createfood () <br/>{< br/> random objrandom = new random (); <br/> point objpoint; <br/> int tempx, Tempy; <br/> for (INT I = 0; I ++) <br/> {<br/> tempx = objrandom. next (backwidth) % (backwidth/11); <br/> Tempy = objrandom. next (backheight) % (backheight/11); <br/> If (tempx = 0 | Tempy = 0) <br/>{< br/> continue; <br/>}< br/> else <br/>{< br/> objpoint = new point (tempx, Tempy); </P> <p> If (snake. snail kepoints. contains (objpoint) <br/>{< br/> continue; <br/>}< br/> else <br/>{< br/> objfoodpoint = objpoint; <br/> break; <br/>}< br/> food. drawfood (g); <br/>}</P> <p> // The Snake head hits the snake body. <br/> Public bool ishitoneself () <br/> {<br/> for (INT I = 1; I <snake. snail kepoints. count; I ++) <br/>{< br/> If (snake. snail kepoints [0] = snake. snail kepoints [I]) <br/> return true; <br/>}< br/> return false; <br/>}</P> <p> // accumulate points <br/> Public String getfenshu () <br/>{< br/> return (snake. snail kepoints. count-Snail ke_init_lengh) * 15 ). tostring (); <br/>}< br/>}

AboveCodeThere are many comments, so it is not difficult to understand them. Let's take a look at some suggestions for improvement! :)