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Distance from points to an ellipse 1.0
File ID: 81545






Distance from points to an ellipse 1.0
Download Distance from points to an ellipse 1.0http://www.mathworks.comReport Error Link
License: Shareware
File Size: 10.0 KB
Downloads: 6
Submit Rating:
Distance from points to an ellipse 1.0 Description
Description: This is a modified version of an iterative algorithm published by
D. Eberly.
Internet publication: "Distance from a point to an ellipse in 2D" (2004) Geometric Tools, LLC, www.geometrictools.com
Book publication: "3D Game Engine Design", 2nd edition.
Morgan Kaufmann Publishers, San Francisco, CA, 2007.
(see Section 14.13.1)

Usage: [RSS, XYproj] = Residuals_ellipse(XY,ParG)
Input: XY(n,2) is the array of coordinates of n points
x(i)=XY(i,1), y(i)=XY(i,2)
ParG is a vector 5x1 of the ellipse parameters
ParG = [Center(1:2), Axes(1:2), Angle]'
Center - the coordinates of the ellipse's center
Axes - the axes (major, minor)
Angle - the angle of tilt of the ellipse

Output: RSS is the Residual Sum of Squares (the sum of squares of the distances)
XYproj is the array of coordinates of projections(nearest points on the ellipse)

This algorithm is proven to converge and reaches an accuracy of 7-8 significant digit. It takes 4-5 iterations per point, on average.

License: Shareware

Related: center, ellipse, major, minor, angle, dxyi

O/S:BSD, Linux, Solaris, Mac OS X

File Size: 10.0 KB

Downloads: 6



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Internet publication: "Distance from a point to an ellipse in 2D" (2004) Geometric Tools, LLC, www.geometrictools.com
Book publication: "3D Game Engine Design", 2nd edition.
Morgan Kaufmann Publishers, San Francisco, CA, 2007.
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