CADSoftTools

Posted: **28 Jun 2016, 09:49**

Hello,
I made a button for making a circle.
Let's see it below:
private void button1_Click(object sender, EventArgs e)
{
CreateNewDrawing();
CADCircle vCircle = new CADCircle();
vCircle.Color = Color.Red;
vCircle.Point = new DPoint(100, 100, 0);
vCircle.Radius = 0.1;
cadImage.Converter.Loads(vCircle);
cadImage.CurrentLayout.AddEntity(vCircle);
cadImage.GetExtents();
RectangleF vRect;
double vRatio = (double)(cadImage.AbsHeight * pictureBox1.ClientSize.Width) / (cadImage.AbsWidth * pictureBox1.ClientSize.Height);
if (vRatio > 1)
vRect = new RectangleF(0, 0, (float)(pictureBox1.ClientSize.Width / vRatio), (float)pictureBox1.ClientSize.Height);
else
vRect = new RectangleF(0, 0, (float)pictureBox1.ClientSize.Width, (float)(pictureBox1.ClientSize.Height * vRatio));

cadImage.Draw(pictureBox1.CreateGraphics(), vRect);
}
I could make a circle, but couldn't fill the color in the circle.
Do you have a way?

Thanks,
JH Yoon

Posted: **29 Jun 2016, 21:05**

Hello JH Yoon,

To fill a circle with color, you'll have to create a solid hatch with the boundary equal to the circle boundary. In other words, you will need to replicate the circle boundary using one of the CAD2DCurve derivatives, to be more exact, with using a CAD2DEllipse object:

Code: Select all

            CADCircle vCircle = new CADCircle();
            vCircle.Color = Color.Red;
            vCircle.Point = new DPoint(100, 100, 0);
            vCircle.Radius = 30;
            cadImage.Converter.Loads(vCircle);
            cadImage.CurrentLayout.AddEntity(vCircle);

            CAD2DEllipse vEllipse = new CAD2DEllipse();
            vEllipse.CenterPoint = vCircle.Point;
            // The x-coordinate of the major point should be equal to the circle radius
            vEllipse.MajorPoint = new CAD2DPoint(30, 0);
            // Note: CAD2DEllipse.Radius actually specifies a ratio between the major and minor axes of CAD2DEllipse
            vEllipse.Radius = 1;

Notice that the CAD2DCurve derivatives (CAD2DEllipse, CAD2DLine, CAD2DArc, etc.) are auxiliary objects, they are not added directly to CADImage.Converter and not visible on the drawing. These objects should be used to form a hatch boundary list:

Code: Select all

            CAD2DBoundaryList vBoundaryList = new CAD2DBoundaryList();
            vBoundaryList.Add(vEllipse);

Now you have a boundary list that consists of a single boundary which replicates the boundary of your circle, so you can create a solid hatch:

Code: Select all

            CADCurvePolygon vHatch = new CADCurvePolygon();
            vHatch.BoundaryData.Add(vBoundaryList);
            vHatch.Color = Color.Green;
            cadImage.Converter.Loads(vHatch);
            cadImage.CurrentLayout.AddEntity(vHatch);
            cadImage.GetExtents();

Mikhail

CADSoftTools

How to fill colors at circle?

How to fill colors at circle?

Re: How to fill colors at circle?