Function getMatrixFromUpVector

Engine/source/math/mathUtils.cpp:218–233

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void getMatrixFromUpVector( const VectorF &up, MatrixF *outMat )
{
   AssertFatal( up.isUnitLength(), "MathUtils::getMatrixFromUpVector() - Up vector was not normalized!" );
   AssertFatal( outMat, "MathUtils::getMatrixFromUpVector() - Got null output matrix!" );
   AssertFatal( outMat->isAffine(), "MathUtils::getMatrixFromUpVector() - Got uninitialized matrix!" );

   VectorF forward = mPerp( up );
   VectorF right = mCross( forward, up );
   right.normalize();
   forward = mCross( up, right );
   forward.normalize();

   outMat->setColumn( 0, right );
   outMat->setColumn( 1, forward );
   outMat->setColumn( 2, up );
}

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