coyote: CGLINEINTERSECT

Description
This function returns the intersection of two line segments, represented by four points.
Categories
Utilities
Params
x0: in, required
     The x location of the one end of the first line segment.
y0: in, required
     The y location of the one end of the first line segment.
x1: in, required
     The x location of the other end of the first line segment.
y1: in, required
     The y location of the other end of the first line segment.
x2: in, required
     The x location of the one end of the second line segment.
y2: in, required
     The y location of the one end of the second line segment.
x3: in, required
     The x location of the other end of the second line segment.
y3: in, required
     The y location of the other end of the second line segment.
Author
FANNING SOFTWARE CONSULTING::
    David W. Fanning
    1645 Sheely Drive
    Fort Collins, CO 80526 USA
    Phone: 970-221-0438
    E-mail: david@idlcoyote.com
    Coyote's Guide to IDL Programming: http://www.idlcoyote.com
History
Change History::
   Written, 10 September 2014 on suggestion of Wang Kang.
Copyright
Copyright (c) 2014, Fanning Software Consulting, Inc.