C # Draw a sine curve

The problem is that the CPU curve in the task manager is displayed in a straight line with a balance of 50%,

Then write another program to display the CPU curve in the form of a sine curve,

Haha, it's interesting. I was fascinated by last night's viewing, but because it was too late, I didn't pay too much attention to it,

However, I am still a little curious, because I have never written a sine curve before,

Therefore, the sine curve is written together in the morning. Of course, this sine curve does not display the CPU curve in a sine curve,

Instead, return the sine curve with an image.

If anyone is interested, you can definitely try the question above. It's awesome to come up with such a question.

The Code is as follows:

Try

{

Using (Bitmap sinImage = new Bitmap (360,120 ))

{

Using (Graphics myGraphics = Graphics. FromImage (sinImage ))

{

MyGraphics. Clear (Color. White );

MyGraphics. SmoothingMode = SmoothingMode. AntiAlias;

Rectangle r1 = new Rectangle (0, 0,360, 20 );

Rectangle r2 = new Rectangle (0, 20,360, 40 );

Rectangle r3 = new Rectangle (0, 60,360, 40 );

Rectangle r4 = new Rectangle (0,100,360, 20 );

 

Brush brush1 = new SolidBrush (Color. OrangeRed );

Brush brush2 = new SolidBrush (Color. SkyBlue );

Brush brush3 = new SolidBrush (Color. Pink );

Brush brush4 = new SolidBrush (Color. YellowGreen );

 

MyGraphics. FillRectangle (brush1, r1 );

MyGraphics. FillRectangle (brush2, r2 );

MyGraphics. FillRectangle (brush2, r3 );

MyGraphics. FillRectangle (brush1, r4 );

 

MyGraphics. DrawString ("0", new Font ("", 8), brush1, new PointF (3, 65 ));

MyGraphics. DrawString ("90", new Font ("", 8), brush1, new PointF (85, 65 ));

MyGraphics. DrawString ("180", new Font ("", 8), brush1, new PointF (170, 65 ));

MyGraphics. DrawString ("360", new Font ("", 8), brush1, new PointF (336, 65 ));

 

Point myPoint = new Point (0, 60 );

Float sinValue = 0.0F;

 

For (int I = 0; I <360; I ++)

{

SinValue = Convert. ToSingle (Math. Sin (Convert. ToSingle (I * Math. PI)/180) * 40;

// In fact, there is no need to pay attention to the positive and negative values of sinValue.

// When it is negative, 60-sinvalue will increase

Point thisPoint = new Point (I, Convert. ToInt32 (60-sinValue ));

MyGraphics. DrawLine (new Pen (brush3), thisPoint, myPoint );

MyPoint = thisPoint;

}

 

}

Using (System. IO. MemoryStream MS = new System. IO. MemoryStream ())

{

Context. Response. ContentType = "Image/PNG ";

Context. Response. Clear ();

Context. Response. BufferOutput = true;

SinImage. Save (MS, ImageFormat. Png );

Ms. Flush ();

Context. Response. BinaryWrite (ms. GetBuffer ());

}

}

}

Catch

{

Return;

}