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double Geom::Matrix::expansionX (  )  const

Calculates the amount of x-scaling imparted by the Matrix. This is the scaling applied to the original x-axis region. It is {not} the overall x-scaling of the transformation. Equivalent to L2(m.xAxis())

Definition at line 73 of file matrix.cpp.

Referenced by sp_item_invoke_bbox_full().

                                {
    return sqrt(_c[0] * _c[0] + _c[1] * _c[1]);
}


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