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Geometry.h
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26 //# $Id: Combinatorics.h 21116 2011-07-21 11:23:15Z gervandiepen $
27 
28 #ifndef SCIMATH_GEOMETRY_H
29 #define SCIMATH_GEOMETRY_H
30 
31 #include <casacore/casa/aips.h>
33 #include <utility>
34 
35 namespace casacore { //# NAMESPACE CASACORE - BEGIN
36 
37 // <summary>
38 // Geometry related methods.
39 // </summary>
40 
41 // <use visibility=export>
42 
43 //# <author>Dave Mehringer</author>
44 // <reviewed reviewer="" date="yyyy/mm/dd" tests="" demos="">
45 // </reviewed>
46 // <etymology>
47 // self-explanatory
48 // </etymology>
49 
50 // <synopsis>
51 // Various geometry related functions
52 // </synopsis>
53 
54 // <motivation>
55 // Commonly used geometrical functions for various image and region
56 // applications.
57 // </motivation>
58 
59 class Geometry {
60 
61 public:
62 
63  // Get result of rotating a 2-D vector counterclockwise through an angle
64  // <src>theta</src>. The output pair will have x as the first
65  // member and y as the second. <src>theta</src> must have angular units (no explicit
66  // checking is done, but an exception will be thrown from the Quanta code if not).
67  static std::pair<Double, Double> rotate2D(
68  Double x, Double y, const Quantity& theta
69  );
70 
71  // Determine if two coplanar line segments, a and b, intersect. Line segment a
72  // has end points a0 and a1, and line segment b has endpoints b0 and b1.
73  // Algorithm from
74  // http://stackoverflow.com/questions/563198/how-do-you-detect-where-two-line-segments-intersect
76  Double a0x, Double a0y, Double a1x, Double a1y,
77  Double b0x, Double b0y, Double b1x, Double b1y
78  );
79 
80 };
81 } //# NAMESPACE CASACORE - END
82 
83 #endif
84 
static std::pair< Double, Double > rotate2D(Double x, Double y, const Quantity &theta)
Get result of rotating a 2-D vector counterclockwise through an angle theta.
static Bool doLineSegmentsIntersect(Double a0x, Double a0y, Double a1x, Double a1y, Double b0x, Double b0y, Double b1x, Double b1y)
Determine if two coplanar line segments, a and b, intersect.
Geometry related methods.
Definition: Geometry.h:59
double Double
Definition: aipstype.h:55
bool Bool
Define the standard types used by Casacore.
Definition: aipstype.h:42
#define casacore
&lt;X11/Intrinsic.h&gt; #defines true, false, casacore::Bool, and String.
Definition: X11Intrinsic.h:42