Tagged Questions
0
votes
2answers
32 views
Finding the tangents common to two rotated ellipses?
Is there a way to find the four tangents that two rotated ellipses share?
I believe that if two ellipses do not intersect and do not contain one another, they will have four tangents in common and I ...
3
votes
1answer
209 views
Ellipse center with three points and the semi-axis lengths given
Having three given points in the two-dimensional plane and semi-axis lengths $a$ and $b$ of an ellipse, how to determine the center? By construction (the "Euclidean way") or analytic geometry.
0
votes
0answers
75 views
Minimize the number of ellipses to cover a region
Suppose I have n ellipses, $\left\lbrace E_i \right\rbrace_{i=1}^n $; each ellipse, $E_i$, has the same area $A_1$. I want to completely cover a region (assume a rectangle) , $R$, with the least ...
1
vote
2answers
307 views
Fitting data to a portion of an ellipse or conic section
Is there a straightforward algorithm for fitting data to an ellipse or other conic section? The data generally only approximately fits a portion of the ellipse. I am looking for something that doesn't ...
2
votes
2answers
228 views
Uniform thickness border around skewed ellipse?
I have an ellipse with a given major and minor 'radius'. I then apply a 2D skew affine transformation to it. Then, I want to draw a uniform border inside this new shape, as if a circle were rolled ...
