用EasyX做弹跳球小球速度快了，为什么会穿过挡板和砖块
只有小球速度是1时正常，速度调快就直接穿过去了，感觉逻辑没错啊{:10_297:}#include<iostream>
#include<graphics.h>
#include<conio.h>
using namespace std;
#define H 480
#define W 640
#define MUN 20//砖块个数
#define NUM 4
int ball_x, ball_y;//小球坐标
int ball_vx, ball_vy;//小球速度
int ball_r;//小球坐标
int bar_x, bar_y;//挡板中心的坐标
int bar_h, bar_w;//挡板的高度和宽度
int bar_left, bar_right, bar_up, bar_down;//挡板上下左右的坐标
int bar_v;//挡板速度
int isbrick;//砖块是否存在 1为存在 0为消失
int brick_h, brick_w;//砖的高度和宽度
int a;
//数据初始化
void init()
{
ball_x = W / 2;
ball_y = H / 2;
ball_vx =2;
ball_vy = 2;
bar_h = H / 20;
bar_w = W / 5;
ball_r = 10;
bar_v = 15;
bar_x = W / 2;
bar_y = H - bar_h / 2;
bar_left = bar_x - bar_w / 2;
bar_right = bar_x + bar_w / 2;
bar_up = bar_y - bar_h / 2;
bar_down = bar_y + bar_h / 2;
brick_h = 30;
brick_w = W / MUN;
for(int i=0;i<MUN;i++)
for(int j=0;j<NUM;j++)
isbrick=1;//判断方块是否存在
a = NUM * MUN;
}
//绘制
void show()
{
//绘制球
setfillcolor(WHITE);
fillcircle(ball_x,ball_y,ball_r);
//绘制矩形挡板
solidrectangle(bar_left, bar_up, bar_right, bar_down);
setcolor(BLACK);
setfillcolor(YELLOW);
for (int i = 0; i < MUN; i++)
{
for (int j = 0; j < NUM; j++)
{
if(isbrick==1)
fillrectangle(brick_w*i, brick_h*j, brick_w*i + brick_w, brick_h+brick_h*j);
}}
Sleep(1);
}
//清除之前绘制的图形
void endshow()
{
setcolor(BLACK);
setfillcolor(BLACK);
fillcircle(ball_x, ball_y, ball_r);
setcolor(BLACK);
setfillcolor(BLACK);
solidrectangle(bar_left,bar_up,bar_right,bar_down );
for (int i = 0; i < MUN; i++)
{
for (int j = 0; j < NUM; j++)
{
if (isbrick== 0)
setcolor(BLACK);
setfillcolor(BLACK);
fillrectangle(brick_w*i, brick_h*j, brick_w*i + brick_w, brick_h+brick_h*j);
}
}
}
//小球运动状态
void AI()
{
//小球自动移动
ball_x += ball_vx;
ball_y += ball_vy;
//小球撞到墙壁之后反弹
if (ball_x <= ball_r || ball_x >= (W - ball_r))
ball_vx = -ball_vx;
if (ball_y <= ball_r || ball_y >= (H - ball_r))
ball_vy = -ball_vy;
//小球撞到挡板之后反弹
//小球撞挡板上边
if (ball_y + ball_r == bar_up)
if ((ball_x + ball_r >= bar_left) && (ball_x - ball_r <= bar_right))
ball_vy = -ball_vy;
//小球撞到挡板下面
if(ball_y-ball_r==bar_down)
if ((ball_x + ball_r >= bar_left) && (ball_x - ball_r <= bar_right))
ball_vy = -ball_vy;
//小球撞到挡板左边
if (ball_x + ball_r == bar_left)
if ((ball_y + ball_r >= bar_up) && (ball_y - ball_r <= bar_down))
ball_vx = -ball_vx;
//小球撞到挡板右边
if (ball_x - ball_r == bar_right)
if ((ball_y + ball_r >= bar_up) && (ball_y - ball_r <= bar_down))
ball_vx = -ball_vx;
//小球撞砖块
for (int i = 0; i < MUN; i++)
{
for (int j = 0; j < NUM; j++)
{
if (isbrick == 1)
{
if (((ball_y - ball_r) == brick_h*j+brick_h) && (ball_x >= brick_w * i) && (ball_x <= (brick_w*i + brick_w)))
{
isbrick = 0;
ball_vy = -ball_vy;
}
if (((ball_y + ball_r) == brick_h * j) && (ball_x >= brick_w * i) && (ball_x <= (brick_w*i + brick_w)))
{
isbrick = 0;
ball_vy = -ball_vy;
}
if ((ball_x - ball_r == brick_w * i + brick_w) && (ball_y - ball_r <= brick_h*j+brick_h) && (ball_y + ball_r >= brick_h*j))
{
isbrick = 0;
ball_vx = -ball_vx;
}
if ((ball_x + ball_r == brick_w * i) && (ball_y - ball_r <= brick_h*j+brick_h) && (ball_y + ball_r >= brick_h*j))
{
isbrick = 0;
ball_vx = -ball_vx;
}
//a--;
}
}
}
}
//键盘操作
void key()
{
char ch;
if (_kbhit())
{
ch = _getch();
if ((ch=='A'||ch == 'a')&&bar_left > bar_v)
{
bar_x = bar_x - bar_v;
bar_left = bar_x - bar_w / 2;
bar_right = bar_x + bar_w / 2;
}
if ((ch=='D'||ch == 'd')&&bar_right < W-bar_v)
{
bar_x = bar_x + bar_v;
bar_left = bar_x - bar_w / 2;
bar_right = bar_x + bar_w / 2;
}
if ((ch=='W'||ch == 'w')&&bar_up >0)
{
bar_y = bar_y - bar_v;
bar_up = bar_y - bar_h / 2;
bar_down = bar_y + bar_h / 2;
}
if ((ch=='S'||ch == 's')&&bar_down <H)
{
bar_y = bar_y + bar_v;
bar_up = bar_y - bar_h / 2;
bar_down = bar_y + bar_h / 2;
}
}
}
int main()
{
init();
initgraph(W, H);
BeginBatchDraw();//缓冲函数
while (1)
{
endshow();
AI();
key();
show();
FlushBatchDraw();
//Sleep(1);
}
EndBatchDraw();
return 0;
}
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