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| using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace WindowsFormsApp1
{
public partial class Form1 : Form
{
public class StackX
{
private int maxSize;
private int[] stackArray;
private int top;
public StackX(int s)
{
maxSize = s;
stackArray = new int[maxSize];
top = -1;
}
public void push(int j)
{
stackArray[++top] = j;
}
public int pop()
{
return stackArray[top--];
}
public long peek()
{
return stackArray[top];
}
public bool isEmpty()
{
return (top == -1);
}
public bool isFull()
{
return (top == maxSize - 1);
}
}
public Form1()
{
InitializeComponent();
}
static Bitmap b = new Bitmap(600, 600);
Graphics gr = Graphics.FromImage(b);
Pen p = new Pen(Color.Black);
int x0, y0, xmax, ymax;
int hx = 3, hy = 3;
StackX stx = new StackX(1000);
StackX sty = new StackX(1000);
int x1max = 200, xmin = 0, y1max = 200, ymin = 0;
Rectangle rec;
Point P1, P2;
//Функция определения знака целого числа
int sign(int r)
{
if (r > 0) return 1;
else if (r < 0) return -1;
else return 0;
}
//Вывод "крупного" пиксела на экран
void point(int ix, int iy)
{
P1 = new Point(x0 + hx * 2 * ix - hx + 1, y0 - hy * 2 * iy - hy + 1);
P2 = new Point(x0 + hx * 2 * ix + hx - 1, y0 - hy * 2 * iy + hy - 1);
rec = new Rectangle(P1, new Size(x0 + hx * 2 * ix + hx - 1 - (x0 + hx * 2 * ix - hx + 1), y0 - hy * 2 * iy + hy - 1 - (y0 - hy * 2 * iy - hy + 1)));
gr.FillRectangle(Brushes.Black, rec);
}
//Генерация точек прямой методом приращений
void line4(int x0, int y0, int x1, int y1)
{
int dx = Math.Abs(x1 - x0), dy = Math.Abs(y1 - y0);
int ex, ey;
if (x1 > x0) ex = 1; else ex = -1;
if (y1 > y0) ey = 1; else ey = -1;
int E = 0, x = x0, y = y0;
while ((y != y1) || (x != x1))
{
gr.DrawRectangle(p, x, y, 1, 1);
if (E > 0) { E -= dx; y += ey; } else { E += dy; x += ex; }
}
gr.DrawRectangle(p, x, y, 1, 1);
}
void flstr(int x, int y)
{
int xleft, xright, tmp, flag = 0, xenter;
stx.push(x);
sty.push(y);
while (!(stx.isEmpty()) && !(sty.isEmpty()))
{
x = stx.pop();
y = sty.pop();
tmp = x;
while (Color.Black.ToArgb() != b.GetPixel(x, y).ToArgb() && x <= x1max)
x++;
xright = x - 1;
x = tmp;
while (Color.Black.ToArgb() != b.GetPixel(x, y).ToArgb() && x > xmin)
x--;
xleft = x + 1;
gr.DrawLine(p, xleft - 1, y, xright + 1, y);
x = xleft;
for (int i = 0; i < 2; i++)
{
if (y < y1max && y > ymin)
{
x = xleft;
y += 1 - i * 2;
while (x <= xright)
{
flag = 0;
while (Color.Black.ToArgb() != b.GetPixel(x, y).ToArgb() && x < xright)
{
if (flag == 0) flag = 1;
x++;
}
if (flag == 1)
{
if (x == xright && Color.Black.ToArgb() != b.GetPixel(x, y).ToArgb())
{
stx.push(x);
sty.push(y);
}
else { stx.push(x - 1); sty.push(y); }
flag = 0;
}
xenter = x;
while (Color.Black.ToArgb() == b.GetPixel(x, y).ToArgb() && x < xright)
x++;
if (x == xenter) x++;
}
}
y--;
}
}
}
private void button1_Click(object sender, EventArgs e)
{
/*xmax = pictureBox1.Width;
ymax = pictureBox1.Height;
x0 = xmax / 2;
y0 = ymax / 2;
gr.DrawLine(p, x0, 0, x0, ymax);
gr.DrawLine(p, 0, y0, xmax, y0);*/
line4(10, 10, 100, 200);
line4(100, 200, 200, 30);
line4(10, 10, 200, 30);
flstr(200, 200);
pictureBox1.Image = b;
}
}
} |
(
