pb with GORDON surfaces 1-9  10-22

 From: Michael Gibson 11 Dec 2007  (10 of 22)
 1191.10 In reply to 1191.9 Hi lorem, > Why can't I use "Proj" intersection beetween main outline curve and solid at > step2 to get separate volumes? It only creates some points on the solid...that's > why i use the "ugly" extrusion method at stpe3.... You mean by using a Boolean command? That won't work for your case because your shape is not a flat planar curve. For curves to interact with solids in the Boolean commands, the curve must be planar so that it has a well defined extrusion direction. Otherwise MoI is not able to figure out the extrusion direction. If you use Edit / Trim it can work if your curve is pretty close to the surface - Trim will do a kind of "pull" on a non-planar curve towards the surface to be trimmed but it can get confused if the curve is not pretty close by the surface. - Michael

 From: lorem (LOREMBOLO) 11 Dec 2007  (11 of 22)
 1191.11 In reply to 1191.10 Thx Michael, ok for boolean... I was thinking of this tool : and it dont work...or I don't understand ;)

 From: Michael Gibson 11 Dec 2007  (12 of 22)
 1191.12 In reply to 1191.11 Hi lorem - that tool is for something different, it will create the curves where 2 solids intersect each other. It does not cut or edit the solids in any way, it only creates new curves, like this - 2 solids that are pushing through each other: Calculation of the intersection curves - these can now be used as a rail curve or for other construction purposes: This command can also be used to find the points of intersection between a curve and a surface or solid, like this: But the key thing is that this command creates new objects at the curves or points of intersection, it does not cut or modify objects - to modify objects use Trim or the Boolean commands instead. - Michael

 From: lorem (LOREMBOLO) 11 Dec 2007  (13 of 22)
 1191.13 In reply to 1191.12 Ok, I understand... So my method is not so "ugly".... ;)

 From: Frenchy Pilou (PILOU) 11 Dec 2007  (14 of 22)
 hi lorem Something i don't understand : your curves are not "jointed" at the intersection and even not attach at the sides!!! Is that normal? Despite of that Gordon works fine :) Separate the entiere object; kill the half et voila :) --- Pilou Is beautiful that please without concept! My Gallery EDITED: 11 Dec 2007 by PILOU Attachments:

 From: lorem (LOREMBOLO) 11 Dec 2007  (15 of 22)
 1191.15 In reply to 1191.14 Yes Pilou, you are right. In Help file, it's written about network : "It is not necessary for the curves to exactly intersect," But, if the Network tool works fine in the 3dm scene I first posted, it doesn't work anymore on my new scene....maybe too much attempts, and other tools used...so I start over a new one. Question : is it a problem to make a network with different kind of curves (point surves and control points curves...) ?? ? Note : the problem with the Network/gordon + Mirror method is the tangents...symetry is not perfect and it's a bit tricky to adjust points to achieve a perfect mirrored object... .... +++

 From: Marc (TELLIER) 11 Dec 2007  (16 of 22)
 1191.16 In reply to 1191.15 Hi lorem, you must already know this but it is relatively easy to make curves tangent with control points, you just align them in a perpendicular way. (see attached) If your object is not perpendicular to a plane it gets trickier, but building reference geometry with object snap works well in this situation. Regards, Marc Attachments:

 From: Michael Gibson 11 Dec 2007  (17 of 22)
 1191.17 In reply to 1191.15 Hi lorem, > Question : is it a problem to make a network with different kind of curves > (point surves and control points curves...) ?? ? Yes, you can mix together curves that were made using different commands. - Michael

 From: lorem (LOREMBOLO) 12 Dec 2007  (18 of 22)
 1191.18 In reply to 1191.17 Thx for help.... I'm going crazy with network tool.... Here is another 3dm scene....I tweaked curves in order to have a perfectly mirroring object..and now network tool have no result.... :( I think I'll try a different method... Attachments:

 From: Malc615 (MALC) 12 Dec 2007  (19 of 22)
 1191.19 In reply to 1191.18 Hi Lorem I have found that the Network tool can be quite temperamental. You have to use trial and error sometimes to get a surface just right. I have been fiddling with an Audi TT car for a couple of month's (almost done) and have had the same sort of problems as you have encountered. Tried hundreds of ways to do the front wing but eventually cracked it with trial and error. I have had a go with your chair and I think this is what you are after. Notice the outer shell is just a mirror of the original - but still keeping the split down the middle, that is importatant for it to work - and then I used the back spline to creat the curves, just touching, to get the right shape. Keep on trying and you will succeed I am sure. Best of luck. Malc. Attachments: