Introduction - If you have any usage issues, please Google them yourself
Good C++ computational geometry libraries to date have been hideously over-designed and incorporate usage patterns that in most cases require extensive redesigns and rewrites of code in order to functionally integrate within an existing project.
Sometimes a lightweight portable solution that has a bit of error is deemed to be more appropriate and reasonable. However these libraries even though being more than able to cater for such a requirement still burden the end user with undue code clutter, very steep learning curves and in some cases unnecessary overheads.