Make add_{line,quad}_support_points protected to allow overloading them in derived classes.
Make add_{line,quad}_support_points protected to allow overloading
them in derived classes.


git-svn-id: 31d9d2f6432a47c86a3640814024c107794ea77c@4286 0785d39b-7218-0410-832d-ea1e28bc413d

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