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How can i fill a rotated rectangle? I can only fill a rectangle that is not rotated and it works fine. But i recently need to fill a rotated rectangle on any degree.

This is my code

using (ImageMagick.MagickImage img = new ImageMagick.MagickImage())


 img.Read(image.FullPath);
 foreach (var item in ListofCoordinates)


ImageMagick.DrawableFillColor fillColor = new ImageMagick.DrawableFillColor(System.Drawing.Color.LightGray);

var d = int.Parse(Math.Round(((item.Rotation * img.Density.X) / 96)).ToString());
var x = int.Parse(Math.Round(((item.X * img.Density.X) / 96)).ToString());
var y = int.Parse(Math.Round(((item.Y * img.Density.X) / 96)).ToString());
var w = int.Parse(Math.Round(((item.Width * img.Density.X) / 96)).ToString());
var h = int.Parse(Math.Round(((item.Height * img.Density.X) / 96)).ToString());
var r = new System.Drawing.Rectangle(x, y, w, h);

ImageMagick.DrawableRectangle rect = new ImageMagick.DrawableRectangle(r);
img.Draw(fillColor, rect);



img.Write(System.IO.Path.Combine(OutputPath, image.FileName));

This is a sample of what i should achieve

This is the sample image
this is the First picture

This is the output
This is the second picture which is the output

Well, while you could use ImageMagic, the .Net libraries are sufficient.

There are few ways to draw shape like rotated rectangle.

1) Draw 4 points (you could draw any shape this way, not only rectangle), rotate it

C#

 Dim Img As Image = New Bitmap(Me.Picturebox1.Width, Me.Picturebox1.Height)
 Dim g As Graphics = Graphics.FromImage(Img)
 Dim bgBrush As SolidBrush = New SolidBrush(Color.LightSlateGray)
 Dim shPen As Pen = New Pen(Color.Black)

 Dim pts() As Point
 pts = New Point(150, 100), ' 1
 New Point(200, 100), ' 2
 New Point(150, 200), ' 3
 New Point(200, 200) ' 4

 Dim pth As New GraphicsPath
 pth = ShapeData(0)
 g.FillPath(bgBrush, pth) ' fill
 g.DrawPath(shPen, pth) ' border

 Dim Angle As Int16 = 30
 Dim RotMatrix As New Matrix ' rotate matrix to put the shape back to initial coordinates (with bottom left point as reference)
 RotMatrix.Rotate(Angle, MatrixOrder.Append) ' Rotate the pattern to the desired angle
 RotMatrix.TransformPoints(pts) ' carry out matrix transformation over the shape points

VB.NET

Image Img = new Bitmap(this.Picturebox1.Width, this.Picturebox1.Height);
Graphics g = Graphics.FromImage(Img);
SolidBrush bgBrush = new SolidBrush(Color.LightSlateGray);
Pen shPen = new Pen(Color.Black);

Point pts;
pts = new new Point(150, 100), new Point(200, 100), new Point(150, 200), new Point(200, 200) ; // 4

GraphicsPath pth = new GraphicsPath();
pth = ShapeData(0);
g.FillPath(bgBrush, pth); // fill
g.DrawPath(shPen, pth); // border

Int16 Angle = 30;
Matrix RotMatrix = new Matrix(); // rotate matrix to put the shape back to initial coordinates (with bottom left point as reference)
RotMatrix.Rotate(Angle, MatrixOrder.Append); // Rotate the pattern to the desired angle
RotMatrix.TransformPoints(pts); // carry out matrix transformation over the shape points

2) Draw 4 points already rotated

C#

 Dim Img As Image = New Bitmap(Me.Picturebox1.Width, Me.Picturebox1.Height)
 Dim g As Graphics = Graphics.FromImage(Img)
 Dim bgBrush As SolidBrush = New SolidBrush(Color.LightSlateGray)
 Dim shPen As Pen = New Pen(Color.Black)

 Dim pts() As Point
 pts = New Point(150, 100), ' 1 - rotated coordinates
 New Point(210, 110), ' 2 - rotated coordinates
 New Point(140, 200), ' 3 - rotated coordinates
 New Point(200, 210) ' 4 - rotated coordinates

 Dim pth As New GraphicsPath
 pth = ShapeData(0)
 g.FillPath(bgBrush, pth) ' fill
 g.DrawPath(shPen, pth) ' border

VB.NET

Image Img = new Bitmap(this.Picturebox1.Width, this.Picturebox1.Height);
Graphics g = Graphics.FromImage(Img);
SolidBrush bgBrush = new SolidBrush(Color.LightSlateGray);
Pen shPen = new Pen(Color.Black);

Point pts;
pts = new new Point(150, 100), new Point(210, 110), new Point(140, 200), new Point(200, 210) ; // 4

GraphicsPath pth = new GraphicsPath();
pth = ShapeData(0);
g.FillPath(bgBrush, pth); // fill
g.DrawPath(shPen, pth); // border

3) Draw rectangle and rotate graphics. This might be little bit tricky.

C#

Image Img = new Bitmap(this.Picturebox1.Width, this.Picturebox1.Height);
Graphics g = Graphics.FromImage(Img);
SolidBrush bgBrush = new SolidBrush(Color.LightSlateGray);
Pen shPen = new Pen(Color.Black);

Int16 dDimX = 75;
Int16 dDimY = 150;
Int16 dLocX = 200;
Int16 dLocY = 100;
Rectangle rect = new Rectangle(dLocX, dLocY, dDimX, dDimY);

g.RotateTransform(30);

VB.NET

 Dim Img As Image = New Bitmap(Me.Picturebox1.Width, Me.Picturebox1.Height)
 Dim g As Graphics = Graphics.FromImage(Img)
 Dim bgBrush As SolidBrush = New SolidBrush(Color.LightSlateGray)
 Dim shPen As Pen = New Pen(Color.Black)

 Dim dDimX As Int16 = 75
 Dim dDimY As Int16 = 150
 Dim dLocX As Int16 = 200
 Dim dLocY As Int16 = 100
 Dim rect As Rectangle = New Rectangle(dLocX, dLocY, dDimX, dDimY)

 g.RotateTransform(30)