Blitz3D Quaternions

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Leadwerks

I am having trouble converting eulers into quaternions for use in .b3d files. I am using the code from Mark Sibly's MS3D .b3d exporter, but it does not produce correct results:

Procedure EulerAsQuat(pitch.f,yaw.f,roll.f)
sp.f=Sine(pitch/2.0)
cp.f=Cosine(pitch/2.0)
sy.f=Sine(yaw/2.0)
cy.f=Cosine(yaw/2.0)
sr.f=Sine(roll/2.0)
cr.f=Cosine(roll/2.0)
vectorw.f=cr*cp*cy+sr*sp*sy
vectorx.f=sr*cp*cy-cr*sp*sy
vectory.f=cr*sp*cy+sr*cp*sy
vectorz.f=-(cr*cp*sy-sr*sp*cy)
EndProcedure