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llRot2Axis now checks absolute value of s rotation component before normalizing. Also removed some excessive division and cleaned up a bit

cpu-performance
dahlia 2013-06-10 17:10:04 -07:00
parent 1c7fbb86c2
commit b242ead6df
1 changed files with 6 additions and 22 deletions
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28
OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
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@ -4665,37 +4665,21 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
public LSL_Vector llRot2Axis(LSL_Rotation rot)
{
m_host.AddScriptLPS(1);
double x,y,z;
double x, y, z;
if (rot.s > 1) // normalization needed
{
double length = Math.Sqrt(rot.x * rot.x + rot.y * rot.y +
rot.z * rot.z + rot.s * rot.s);
if (Math.Abs(rot.s) > 1) // normalization needed
rot.Normalize();
rot.x /= length;
rot.y /= length;
rot.z /= length;
rot.s /= length;
}
// double angle = 2 * Math.Acos(rot.s);
double s = Math.Sqrt(1 - rot.s * rot.s);
if (s < 0.001)
{
x = 1;
y = z = 0;
return new LSL_Vector(1, 0, 0);
}
else
{
x = rot.x / s; // normalise axis
y = rot.y / s;
z = rot.z / s;
double invS = 1.0 / s;
return new LSL_Vector(rot.x * invS, rot.y * invS, rot.z * invS);
}
if ((double.IsNaN(x)) || double.IsInfinity(x)) x = 0;
if ((double.IsNaN(y)) || double.IsInfinity(y)) y = 0;
if ((double.IsNaN(z)) || double.IsInfinity(z)) z = 0;
return new LSL_Vector(x,y,z);
}