November 3rd, 2009, 11:36 PM
I want to trim/remove portion of the ellipse when it intersect with another ellipse.There is no inbuilt function in C# to find intersection points.
So I tried by solving both ellipse equation...but i couldnt solve the equation completely since it is resulting in 4 degree equation.
Can any one suggest how to proceed.
November 5th, 2009, 06:44 PM
Re: Trim ellipse
A suggestion, but needs a little work. Assuming you have used an equation to calculate all of the points in your foreground ellipse and they are in pt and you are drawing in response to a Paint message and hence have the Graphics g.
Draw the foreground ellipse.
Create a GraphicsPath gp, using the points in pt.
Create a Region r passing gp in the constructor.
Do a g.ExcludeClip(r) to prevent painting in the Region r.
Draw the background ellipse.
I got it to work using the bounding Rectangle of the foreground ellipse to create the Region, but that is not exactly what you want.
Hope this helps.
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