怎么用编程用点画线

时间:2025-01-26 16:35:56 网络游戏

1. 使用C语言和graphics.h库

```c

include

include

include

void circlepoint(int x0, int y0, int x, int y, int color) {

putpixel(x0 + x * y0 + y, color);

putpixel(x0 + y * y0 + x, color);

putpixel(x0 + x * y0 - y, color);

putpixel(x0 + y * y0 - x, color);

putpixel(x0 - x * y0 + y, color);

putpixel(x0 - y * y0 + x, color);

putpixel(x0 - x * y0 - y, color);

putpixel(x0 - y * y0 - x, color);

}

void midpointcircle(int x0, int y0, int r, int color) {

int xydsamechange;

// 实现中点画圆的代码

}

int main() {

int gd = DETECT, gm;

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

setcolor(RED);

circlepoint(100, 100, 50, 50, RED);

getch();

closegraph();

return 0;

}

```

2. 使用Java和Swing

```java

import javax.swing.*;

import java.awt.*;

public class DrawLine extends JPanel {

public static void main(String[] args) {

JFrame frame = new JFrame("Midpoint line drawing algorithm");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setSize(350, 350);

frame.add(new DrawLine());

frame.setVisible(true);

}

@Override

protected void paintComponent(Graphics g) {

super.paintComponent(g);

Point p1 = new Point(50, 50);

Point p2 = new Point(200, 200);

int x, y, xEnd;

if (p1.x > p2.x) {

x = p2.x;

y = p2.y;

xEnd = p1.x;

} else {

x = p1.x;

y = p1.y;

xEnd = p2.x;

}

int a = p1.x - p2.x;

int b = p1.y - p2.y;

int d = 2 * a + b;

int d1 = 2 * a;

int d2 = 2 * (a + b);

int x1 = p1.x;

int y1 = p1.y;

int x = x1;

int y = y1;

while (x <= xEnd) {

if (d < 0) {

x++;

y++;

d += d2;

} else {

x++;

d += d1;

}

g.drawLine(x, y, x, y);

}

}

}

```

3. 使用OpenGL