C蛇游戏与自身相撞

时间:2016-09-03 00:11:55

标签: c

我按照这个指南用c ++做了一个蛇游戏,但是我用c做了我的游戏。 https://www.youtube.com/watch?v=PSoLD9mVXTA

我只有一个问题,否则我已经设定了。我不能让蛇正确地与自身发生碰撞,我无法弄清楚为什么它对视频中的那个人起作用,但相同的代码对我来说没有用。

代码很丑陋而且组织得不好。不要评判我,我还在学习!

#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <windows.h>

int gameOver = 1;
const int width = 20;
const int height = 20;
typedef enum {STOP = 0, LEFT, RIGHT, UP, DOWN} eDirection;
eDirection dir;
int x, y, fruitX, fruitY, score;

int tailX[100], tailY[100];
int nTail;


void Setup(){
    gameOver = 0;
    dir = STOP;
    x = width / 2;
    y = height / 2;
    fruitX = rand() % width;
    fruitY = rand() % height;
    score = 0;

}

void Draw(){

    system("cls");

    for(int i = 0; i < width +3; i++)
        printf("#");
        printf("\n");

    for(int i = 0; i < height; i++){

        for(int j = 0; j < width+2; j++){


                if(j == 0){
                    printf("#");
                }
                if(j == width+1){
                    printf("#");
                }

                if(i == y && j == x){
                    printf("*");

                }else if(i == fruitY && j == fruitX){
                    printf("F");

                }else{

                    int print = 0;
                    for(int k = 0; k < nTail; k++){

                        if(tailX[k] == j && tailY[k] == i){

                            printf("*");
                            print = 1;
                        }
                    }
                    if(!print){
                        printf(" ");
                    }
                }

            }
            printf("\n");
        }

    for(int i = 0; i < width +3; i++)
        printf("#");
        printf("\n");


    printf("\nScore : %d",score);
}

void Input(){

   if (kbhit()){
        switch (getch()){
            case 'a':
                dir = LEFT;
                break;
            case 'd':
                dir = RIGHT;
                break;
            case 'w':
                dir = UP;
                break;
            case 's':
                dir = DOWN;
                break;
            default:
                break;
        }
   }

}

void Logic(){


    int prevX = tailX[0];
    int prevY = tailY[0];
    int prev2X, prev2Y;
    tailX[0] = x;
    tailY[0] = y;

    for(int 1 = 0; i < nTail; i++){
        prev2X = tailX[i];
        prev2Y = tailY[i];
        tailX[i] = prevX;
        tailY[i] = prevY;
        prevX = prev2X;
        prevY = prev2Y;

    }

    if(x > width || x < 0 || y > height-1 || y < 0){
        gameOver = 1;
    }
    if(x == fruitX && y == fruitY){

        fruitX = rand() % width;
        fruitY = rand() % height;
        score = score + 10;

        nTail++;
    }
   //collision code
    for(int i = 0; i < nTail; i++)
        if(tailX[i] == x && tailY[i] == y){
            gameOver = 1;
    }


    switch(dir){

        case LEFT:
            x--;
            break;
        case RIGHT:
            x++;
            break;
        case UP:
            y--;
            break;
        case DOWN:
            y++;
            break;
        default:
            break;
    }



}

int main(){

    Setup();
        while(!gameOver){
            Draw();
            Input();
            Logic();
            Sleep(100);
        }

return 0;
}

1 个答案:

答案 0 :(得分:1)

一旦你结果,你的节目就会失败。

<强>解释

当您的代码启动时,您没有尾部,即nTail0

Logic()你做:

tailX[0] = x;
tailY[0] = y;

因此索引零设置为当前位置(即使nTail为零)。

当你点击水果时:

if(x == fruitX && y == fruitY){

    fruitX = rand() % width;
    fruitY = rand() % height;
    score = score + 10;

    nTail++;    <---- Here you increment nTail so it becomes 1
}

然后你做

//collision code
for(int i = 0; i < nTail; i++)
    if(tailX[i] == x && tailY[i] == y){
        gameOver = 1;
}

因为nTail1,所以它与:

相同
    if(tailX[0] == x && tailY[0] == y){
        gameOver = 1;
    }

这正是您在Logic开始时所做的任务。换句话说 - 它是truegameover将变为1。

也许解决方案是从1而不是0开始:

//collision code
for(int i = 1; i < nTail; i++)
       ^^^

与碰撞检测有关的另一个问题。

if(x == fruitX && y == fruitY){

    fruitX = rand() % width;
    fruitY = rand() % height;
    score = score + 10;

    nTail++;    <---- Here you increment nTail but no value is
                      written to tailX[nTail-1] and tailY[nTail-1] 
                      after the increment
}
//collision code
for(int i = 0; i < nTail; i++)
    if(tailX[i] == x && tailY[i] == y){  <-- Here you use tailX[nTail-1] and tailY[nTail-1]
        gameOver = 1;
}

所以,当你刚吃完水果时,你会与不属于尾巴的数值进行比较。