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Unusual Scaling Problem in XNA (C#)

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Hello,

I have a very simple model of a table that is a diameter of 2 units. When I render the model in my XNA (C#) application, everything looks great. However when I scale x/z by 2, it looks like it is scaling larger than a magnitude of 2. Attached are two pictures (unscaled and scaled). I have drawn a plane down the center of the table and two plans 2 units apart in the unscaled, and then 4 units apart in the scaled.

The code below is how I create my world matrix for the mesh:


// the world position gets cached on processing of the scene node in the center of the bounding volume
Vector3 vWorldPosition = m_BoundingVolume.Center;

Matrix mTranslation;
Matrix mScale;
Matrix mRotation;

Vector3 m_vScale = new Vector3(2.0f, 1.0f, 2.0f);

Matrix.CreateTranslation(vWorldPosition.X, vWorldPosition.Y, vWorldPosition.Z, out mTranslation);
Matrix.CreateFromQuaternion(ref m_qOrientation, out mRotation);
Matrix.CreateScale(ref m_vScale, out mScale);

m_mCachedWorldMatrix = mScale * mRotation * mTranslation;



As you can see the code is very simple, so I am not sure where I am going wrong. Can any one suggest any ideas, or even any ideas of a way to debug this, I have exhausted all avenues I can think of.

Thank you!!

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