笛卡尔-心形图 源代码 分析

[lqshn]

java的代码如下，谁能帮我用C#改写一下啊，谢谢，感激不尽
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

/**
* 笛卡尔情书的秘密r=a(1-sinθ)
*
* @author crazykay
* @see 《趣味编程100例》心形图
*/
public class JavaFXApplicationHeart extends Application {

@Override
public void start(Stage primaryStage) {
int width, height;
Canvas canvas = new Canvas(350, 350);
width = (int) canvas.getWidth();
height = (int) canvas.getHeight();

GraphicsContext gc = canvas.getGraphicsContext2D();
double x, y, r;
for (int i = 0; i <= 90; i++) {
for (int j = 0; j <= 90; j++) {
//转换为直角坐标系，设置偏移量，使图像居中
r = Math.PI / 45 * i * (1 - Math.sin(Math.PI / 45 * j)) * 19;
x = r * Math.cos(Math.PI / 45 * j) * Math.sin(Math.PI / 45 * i) + width / 2;
y = -r * Math.sin(Math.PI / 45 * j) + height / 4;

gc.setFill(Color.RED);
gc.fillOval(x, y, 2, 2);
gc.fillOval(x, y, 1, 1);
}
}


StackPane root = new StackPane();
root.getChildren().add(canvas);

Scene scene = new Scene(root, Color.BLACK);

primaryStage.setTitle("r=a(1-sinθ)");
primaryStage.setScene(scene);
primaryStage.show();
}

public static void main(String[] args) {
launch(args);
}
}
源地址http://www.oschina.net/code/snippet_104514_18581

[智商余额不足]

不错哦

[zijiang001]

private void Form4_Load(object sender, EventArgs e)
        {
            this.BackColor = Color.Black;
            this.Size = new Size(400, 400);
            Panel panel = new Panel();
            panel.Size = new Size(350, 350);
            panel.Paint += new PaintEventHandler(panel_Paint);
            panel.Location = new Point((this.ClientRectangle.Width - panel.Width) / 2, (this.ClientRectangle.Height - panel.Height) / 2);
            this.Controls.Add(panel);
        }



        void panel_Paint(object sender, PaintEventArgs e)
        {
            e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
            double x, y, r;
            int w = e.ClipRectangle.Width;
            int h = e.ClipRectangle.Height;
            for (int i = 0; i <= 90; i++)
            {
                for (int j = 0; j <= 90; j++)
                {
                    //转换为直角坐标系，设置偏移量，使图像居中
                    r = Math.PI / 45 * i * (1 - Math.Sin(Math.PI / 45 * j)) * 19;
                    x = r * Math.Cos(Math.PI / 45 * j) * Math.Sin(Math.PI / 45 * i) + w / 2;
                    y = -r * Math.Sin(Math.PI / 45 * j) + h / 4;
                    using (Brush brush = new SolidBrush(Color.Red))
                    {
                        e.Graphics.FillEllipse(brush, (float)x, (float)y, 2f, 2f);
                        e.Graphics.FillEllipse(brush, (float)x, (float)y, 1f, 1f);
                    }
                }
            }
        }

[lqshn]

引用 2 楼 zijiang001 的回复:

private void Form4_Load(object sender, EventArgs e)
        {
            this.BackColor = Color.Black;
            this.Size = new Size(400, 400);
            Panel panel = new Panel();
            panel.Size = new Size(350, 350);
            panel.Paint += new PaintEventHandler(panel_Paint);
            panel.Location = new Point((this.ClientRectangle.Width - panel.Width) / 2, (this.ClientRectangle.Height - panel.Height) / 2);
            this.Controls.Add(panel);
        }



        void panel_Paint(object sender, PaintEventArgs e)
        {
            e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
            double x, y, r;
            int w = e.ClipRectangle.Width;
            int h = e.ClipRectangle.Height;
            for (int i = 0; i <= 90; i++)
            {
                for (int j = 0; j <= 90; j++)
                {
                    //转换为直角坐标系，设置偏移量，使图像居中
                    r = Math.PI / 45 * i * (1 - Math.Sin(Math.PI / 45 * j)) * 19;
                    x = r * Math.Cos(Math.PI / 45 * j) * Math.Sin(Math.PI / 45 * i) + w / 2;
                    y = -r * Math.Sin(Math.PI / 45 * j) + h / 4;
                    using (Brush brush = new SolidBrush(Color.Red))
                    {
                        e.Graphics.FillEllipse(brush, (float)x, (float)y, 2f, 2f);
                        e.Graphics.FillEllipse(brush, (float)x, (float)y, 1f, 1f);
                    }
                }
            }
        }

请问可以调整运行时这个图像呈现的速率吗？比如说我想在1min才把这个图完全画完

[zijiang001]

用 Thread

[zylsky]

引用 2 楼 zijiang001 的回复:

private void Form4_Load(object sender, EventArgs e)
        {
            this.BackColor = Color.Black;
            this.Size = new Size(400, 400);
            Panel panel = new Panel();
            panel.Size = new Size(350, 350);
            panel.Paint += new PaintEventHandler(panel_Paint);
            panel.Location = new Point((this.ClientRectangle.Width - panel.Width) / 2, (this.ClientRectangle.Height - panel.Height) / 2);
            this.Controls.Add(panel);
        }



        void panel_Paint(object sender, PaintEventArgs e)
        {
            e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
            double x, y, r;
            int w = e.ClipRectangle.Width;
            int h = e.ClipRectangle.Height;
            for (int i = 0; i <= 90; i++)
            {
                for (int j = 0; j <= 90; j++)
                {
                    //转换为直角坐标系，设置偏移量，使图像居中
                    r = Math.PI / 45 * i * (1 - Math.Sin(Math.PI / 45 * j)) * 19;
                    x = r * Math.Cos(Math.PI / 45 * j) * Math.Sin(Math.PI / 45 * i) + w / 2;
                    y = -r * Math.Sin(Math.PI / 45 * j) + h / 4;
                    using (Brush brush = new SolidBrush(Color.Red))
                    {
                        e.Graphics.FillEllipse(brush, (float)x, (float)y, 2f, 2f);
                        e.Graphics.FillEllipse(brush, (float)x, (float)y, 1f, 1f);
                    }
                }
            }
        }

高手.

[kxyzjm62]

[royal1]

运行效果很赞！

[Y_110110]

有没有高手可以做成C++/C呢？