empty cone in a full one

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Author Message   patrick exshaw (pat) New member Username: pat Post Number: 2 Registered: 06-2009 Posted on Sunday, June 28, 2009 - 09:02 am:    I am a novice user and I would like to insert a cone in a bigger one...the first one has to be void...I manage to do it with a cylinder but it does not work with a cone ...can you help me?   Marek Nelson (mgnelson) Moderator Username: mgnelson Post Number: 129 Registered: 07-2007 Posted on Sunday, June 28, 2009 - 07:57 pm:    See http://www.pdesolutions.com/discus/messages/4/556.html   patrick exshaw (pat) Junior Member Username: pat Post Number: 3 Registered: 06-2009 Posted on Monday, June 29, 2009 - 02:27 am:    thank you very much...you really save my life!!!!!!   patrick exshaw (pat) Member Username: pat Post Number: 4 Registered: 06-2009 Posted on Monday, June 29, 2009 - 09:13 am:    In fact you do not exactly save my life... It was so close!!! I always have a problem. My aim is to realise the following drawing...can you help me to add the cylinder ? I try different things but each time I have the sams message : "surfaces are crossed"... thank you for your help..I promise I will not bother you anymore.. several cones and a cylinder.bmp (589.9 k)   patrick exshaw (pat) Member Username: pat Post Number: 5 Registered: 06-2009 Posted on Tuesday, June 30, 2009 - 04:54 am:    Is it possible to insert a small cylinder in a big cone? I always have probleme with "crossed" surfaces! I tried to use surface with 'void' and I do not succeed....If someone know it would be very helpfull   Marek Nelson (mgnelson) Moderator Username: mgnelson Post Number: 130 Registered: 07-2007 Posted on Tuesday, June 30, 2009 - 01:22 pm:    This is a little more difficult to accomplish. You need to be very exact in your surface definitions. The surfaces cannot be discontinuous or crossed. The cylinder must be created with a region, not just by a surface, because the sidewalls would be discontinuous as a surface. I have modified the script from the thread http://www.pdesolutions.com/discus/messages/4/556.html but it was quite tricky to create. cones and cyl.pde (1.5 k)   patrick exshaw (pat) Member Username: pat Post Number: 6 Registered: 06-2009 Posted on Thursday, July 02, 2009 - 10:41 am:    a lot of thanks...it really helps me but I still have a problem with cones' angles..I want to superpose three cones with a very small angle (same angle for the three cones)...and I would like to know if I can reach 16°,14°,12°,10° or 8°.... each time even if I use "feature" as you do I receive error message...can you help me ? 3 cones.bmp (589.9 k)   patrick exshaw (pat) Member Username: pat Post Number: 7 Registered: 06-2009 Posted on Friday, July 03, 2009 - 06:04 am:    moreover if you know how I can insert a sphere in a cone it would be very helpfull thanks for all sphere in a cone.bmp (746.5 k)   patrick exshaw (pat) Member Username: pat Post Number: 8 Registered: 06-2009 Posted on Tuesday, July 07, 2009 - 07:39 am:    sorry to bother you again but I really need your help concerning the cone's angle...I have to reach at least 10° when I superpose several cones...can you help me? For the instance I am limited to 18° and after flexpde stops..   Marek Nelson (mgnelson) Moderator Username: mgnelson Post Number: 137 Registered: 07-2007 Posted on Thursday, July 09, 2009 - 07:37 pm:    The superposition of three cones that you show is actually just one cone with three layers (as far as FlexPDE is concerned.) This should simplify the construction significantly. As long as you have clipped the top of the cone, there should be no problem with an angle less then 10 degrees. Perhaps you are running into a Student version node limit?