"stbenge" <myu### [at] hotmailcom> schreef in bericht 
news:4c3ff1fb@news.povray.org...
> Darren New wrote:
>> stbenge wrote:
>>> method for 3D line/plane intersection,
>>
>> I thought a cheat-sheet kind of thing for this sort of basic geometric 
>> equations would be handy.  A book that goes into the basics of the 
>> geometric math in a way that's easy to look things up, for (say) 
>> inside/outside calcs, intersections of various simple shapes, calculating 
>> angles in various situations, and so on.
>
> That would be nice. I'm making sure to chronicle certain discoveries for 
> future reference. This last problem involved placing an arc of the right 
> radius and angle into an Isosceles triangle so that both the end points of 
> the arc and points B and C of the triangle would meet. Simple math wasn't 
> cutting it, and I ended up sketching out a diagram to find a way to arrive 
> at the correct solution.
>

Not sure if this will help you, but have you tried Friedrich Lohmueller's 
insert menu add-ons? You can find them (with other goodies) at:
http://www.f-lohmueller.de/pov_tut/pov__eng.htm

Thomas

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