FGFS-4.1/OpenSceneGraph
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Changed some routines to produce right-handed rotations.

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This commit is contained in:
Don BURNS 2001-10-13 06:23:55 +00:00
parent fef731c689
commit 49982ac835
1 changed files with 5 additions and 2 deletions
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7
src/osg/Quat.cpp
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@ -19,9 +19,10 @@ const float x,
const float y,
const float z )
{
float _angle = -angle; // Convert to right handed coordinate system
float inversenorm = 1.0/sqrt( x*x + y*y + z*z );
float coshalfangle = cos( 0.5*angle );
float sinhalfangle = sin( 0.5*angle );
float coshalfangle = cos( 0.5*_angle );
float sinhalfangle = sin( 0.5*_angle );
_fv[0] = x * sinhalfangle * inversenorm;
_fv[1] = y * sinhalfangle * inversenorm;
@ -51,6 +52,8 @@ void Quat::makeRot( const Vec3& vec1, const Vec3& vec2 )
// dot product vec1*vec2
float cosangle = vec1*vec2/(length1*length2);
cosangle = - cosangle; // Convert to right-handed coordinate system
if ( fabs(cosangle - 1) < epsilon )
{
// cosangle is close to 1, so the vectors are close to being coincident