- Thuat toan Bresenham de ve duong thang (0<m<1) */
#include <graphics.h>
#include <conio.h>
void Bresenham_Line(int x1, int y1, int x2, int y2, int color)
{
int x, y, dx, dy, e_inc, e_noinc, e;
y = y1;
dx = x2 - x1;
dy = y2 - y1;
e_noinc = dy + dy;
e = e_noinc - dx;
e_inc = e - dx;
for (x=x1; x<=x2; x++)
{
putpixel(x, y, color);
if (e < 0)
e += e_noinc;
else
{
y ++;
e += e_inc;
}
}
}
void main()
{
int gr_drive = DETECT, gr_mode;
initgraph(&gr_drive, &gr_mode, "");
line(0, 0, getmaxx()-120, getmaxy()-150);
Bresenham_Line(0, 0, getmaxx()-120, getmaxy()-150, 4);
getch();
closegraph();
}
Tiêu đề: Thuat toan Bresenham de ve duong thang (0<m<1) 
10/07/10, 09:56 pm