[原创]一个方程实现液体下流效果

#include<stdio.h>
#include<math.h>
#include<graphics.h>
#define PI 3.14
int main()
{
float i ,j ,x ,y;
int MAXX2 ,MAXY2;
int gd = DETECT,gm = 0;

initgraph(&gd,&gm,"");

MAXX2 = getmaxx()/2;
MAXY2 = getmaxy()/2;

setcolor(15);
setfillstyle(1 ,2);

for(j = 0;j < MAXY2*2;j+=40)
{
rectangle(1 ,j ,i+39 ,j+21);
for(i = 0;i < MAXX2*2;i+=40)
{
rectangle(i ,j+1 ,i+39 ,j+20);
floodfill(i+3 ,j+3 ,getcolor());
rectangle(i+20 ,j+21 ,i+59 ,j+40);
floodfill(i+23 ,j+23 ,getcolor());
}
rectangle(21 ,j+21 ,i+59 ,j+41);
floodfill(3 ,j+23 ,getcolor());
}

for(i = -3*PI-1;i < 0;i +=0.005)
{
for(j = -4*PI;j < 4*PI;j += 0.01)
{
x = cos(i*2+j)*20+j*30;
y = sin(i-j*2)*20+i*30*sin(i/2)+sin(x/25)*30;

putpixel(x+MAXX2 ,y+MAXY2 ,4);

if(kbhit())
exit(0);
}
}
getch();
}