Solve equation systems with Eigen to improve convergence #225
Description
See https://drive.google.com/file/d/0B15RHGNY8nBpYnNwcG82WDdseDQ/view. The newly added arc segment has a pt-coincident constraint that causes the failure.
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See https://drive.google.com/file/d/0B15RHGNY8nBpYnNwcG82WDdseDQ/view. The newly added arc segment has a pt-coincident constraint that causes the failure.