1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
/// @ref gtx_polar_coordinates
namespace glm
{
template<typename T, qualifier Q>
GLM_FUNC_QUALIFIER vec<3, T, Q> polar
(
vec<3, T, Q> const& euclidean
)
{
T const Length(length(euclidean));
vec<3, T, Q> const tmp(euclidean / Length);
T const xz_dist(sqrt(tmp.x * tmp.x + tmp.z * tmp.z));
return vec<3, T, Q>(
asin(tmp.y), // latitude
atan(tmp.x, tmp.z), // longitude
xz_dist); // xz distance
}
template<typename T, qualifier Q>
GLM_FUNC_QUALIFIER vec<3, T, Q> euclidean
(
vec<2, T, Q> const& polar
)
{
T const latitude(polar.x);
T const longitude(polar.y);
return vec<3, T, Q>(
cos(latitude) * sin(longitude),
sin(latitude),
cos(latitude) * cos(longitude));
}
}//namespace glm
|
