FGFS-4.1/simgear
4
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

accelerate float rotation_matrix and fix a bug for double rotation_matrix

Browse Source
This commit is contained in:
Erik Hofman 2016-12-14 11:03:32 +01:00
parent abf78f8e31
commit e257dbe6ed
1 changed files with 33 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
simgear/math/simd4x4.hxx
View File

@ -380,6 +380,38 @@ inline simd4_t<float,4> operator*(const simd4x4_t<float,4>& m, const simd4_t<flo
namespace simd4x4
{
template<>
inline simd4x4_t<float,4> rotation_matrix<float>(float angle, const simd4_t<float,3>& axis)
{
float s = std::sin(angle), c = std::cos(angle), t = 1.0-c;
simd4_t<float,4> axt, at = axis*t, as = axis*s;
simd4x4_t<float,4> m;
simd4x4::unit(m);
axt = axis.ptr()[0]*at;
m.m4x4()[0] = axt.v4();
axt = axis.ptr()[1]*at;
m.ptr()[0][0] += c;
m.ptr()[0][1] += as.ptr()[2];
m.ptr()[0][2] -= as.ptr()[1];
m.m4x4()[1] = axt.v4();
axt = axis.ptr()[2]*at;
m.ptr()[1][0] -= as.ptr()[2];
m.ptr()[1][1] += c;
m.ptr()[1][2] += as.ptr()[0];
m.m4x4()[2] = axt.v4();
m.ptr()[2][0] += as.ptr()[1];
m.ptr()[2][1] -= as.ptr()[0];
m.ptr()[2][2] += c;
return m;
}
template<>
inline simd4x4_t<float,4> transpose<float>(simd4x4_t<float,4> m) {
_MM_TRANSPOSE4_PS(m.m4x4()[0], m.m4x4()[1], m.m4x4()[2], m.m4x4()[3]);
@ -546,7 +578,7 @@ template<>
inline simd4x4_t<double,4> rotation_matrix<double>(double angle, const simd4_t<double,3>& axis)
{
double s = std::sin(angle), c = std::cos(angle), t = 1.0-c;
simd4_t<double,3> axt, at = axis*t, as = axis*s;
simd4_t<double,4> axt, at = axis*t, as = axis*s;
simd4x4_t<double,4> m;
simd4x4::unit(m);