NewGamePhysics.Mathematics.EquirectangularProjection Class Reference

Calculate the equirectangular projection (also called the equidistant cylindrical projection, geographic projection, plate carrée or carte parallelogrammatique projection or CPP between lat,lon (degrees) to/from x,y ([0,1]). Reference: http://en.wikipedia.org/wiki/Plate_carr%C3%A9e_projection. More...

List of all members.

Static Public Member Functions

static double lonToX (double lon)
 Convert longitude [0,360] to [0,1] using the mercator projection.
static double latToY (double lat)
 Convert latitude [-90.0,90] to a map position [0,1] using the equirectangilar projection.
static double xToLon (double x)
 Convert a map position [0,1] to longitude [0,360] using the equirectangular projection.
static double yToLat (double y)
 Convert [0,1] to latitude [-90,90] using the equirectangular projection.

Detailed Description

Calculate the equirectangular projection (also called the equidistant cylindrical projection, geographic projection, plate carrée or carte parallelogrammatique projection or CPP between lat,lon (degrees) to/from x,y ([0,1]). Reference: http://en.wikipedia.org/wiki/Plate_carr%C3%A9e_projection.

Definition at line 20 of file EquirectangularProjection.cs.

Member Function Documentation

static double NewGamePhysics.Mathematics.EquirectangularProjection.latToY ( double  lat  )  [static]

Convert latitude [-90.0,90] to a map position [0,1] using the equirectangilar projection.

Parameters:
lat The latitude in degrees.
Returns:
The map position.

Definition at line 44 of file EquirectangularProjection.cs.

00045         {
00046             if ((lat < -90.0) || (lat > 90.0))
00047             {
00048                 throw new ArgumentOutOfRangeException("lat");
00049             }
00050 
00051             return (lat / 90.0 + 1.0) / 2.0;
00052         }

static double NewGamePhysics.Mathematics.EquirectangularProjection.lonToX ( double  lon  )  [static]

Convert longitude [0,360] to [0,1] using the mercator projection.

Parameters:
lon The longitude in degrees.
Returns:
The map position.

Definition at line 28 of file EquirectangularProjection.cs.

00029         {
00030             if ((lon < 0) || (lon > 360.0))
00031             {
00032                 throw new ArgumentOutOfRangeException("lon");
00033             }
00034 
00035             return lon / 360.0;
00036         }

static double NewGamePhysics.Mathematics.EquirectangularProjection.xToLon ( double  x  )  [static]

Convert a map position [0,1] to longitude [0,360] using the equirectangular projection.

Parameters:
x The horizontal map position.
Returns:
The longitude value.

Definition at line 60 of file EquirectangularProjection.cs.

00061         {
00062             if ((x < 0.0) || (x > 1.0))
00063             {
00064                 throw new ArgumentOutOfRangeException("lon");
00065             }
00066 
00067             return x * 360.0;
00068         }

static double NewGamePhysics.Mathematics.EquirectangularProjection.yToLat ( double  y  )  [static]

Convert [0,1] to latitude [-90,90] using the equirectangular projection.

Parameters:
y The vertical map position.
Returns:
The latitude in degrees.

Definition at line 76 of file EquirectangularProjection.cs.

00077         {
00078             if ((y < 0.0) || (y > 1.0))
00079             {
00080                 throw new ArgumentOutOfRangeException("lon");
00081             }
00082 
00083             return y * 180.0 - 90.0;
00084         }

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