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/*!
* Find better splitting of the given quadrangle.
- * \param IDOfQuad ID of the quadrangle to be splitted.
+ * \param IDOfQuad ID of the quadrangle to be split.
* \param Criterion A criterion to choose a diagonal for splitting.
* \return 1 if 1-3 diagonal is better, 2 if 2-4
* diagonal is better, 0 if error occurs.