My point was that a parameteric description does not feature any numbers, since they are parameters and thus variable. A parametric definition of the file I posted would be:
http://groups.google.com/group/grasshopper3d/web/param_curve.png Where: A is given (a point) B is given (a point) v is given (a vertical vector) C is the result of translating A along v for a certain distance D is the result of translating C along v for a certain distance E is the result of translating B along world-x for some distance and along world-z for some distance (1) is the line segment connecting A and C (2) is the arc segment connecting B and E, having a tangent of v at B t is the tangent at the end of (2) F is the result of translating E along t for a certain distance (3) is the nurbs curve with control points {C, D, F, E} no numbers, just relationships. -- David Rutten [email protected] Robert McNeel & Associates On Apr 9, 9:58 pm, Justin <[email protected]> wrote: > Thanks David and Scott. The support for Grasshopper is really great. > > Regarding the dimensions, the 7 and 13 are derived from the height of > an adult and a child *2 + some thickness for the roof structure. > Essentially "(Adult Height * 2) + Roof thickness" So I could have > described it better. > > Thanks again. > > On Apr 9, 12:43 pm, David Rutten <[email protected]> wrote: > > > ps. the image you posted does not actually describe a parametric > > curve. You've posted dimensions, not the logic of how the curve is > > constructed. Numbers like 7 and 13 have no business in a parametric > > definition. > > > -- > > David Rutten > > [email protected] > > Robert McNeel & Associates > > > On Apr 9, 9:41 pm, David Rutten <[email protected]> wrote: > > > > So we have given locations for the start and end points of the curve, > > > and a clear description of a vertical line segment and an arc with a > > > vertical tangent. The wiggly curve in between however is still very > > > undefined. > > > > I uploaded a definition which consists of 3 curves; a vertical line, > > > an arc and a 4pt nurbs curve which is tangent to both. Parameters are > > > all derived from sliders, so you can fiddle with them in real-time: > > > >http://groups.google.com/group/grasshopper3d/web/Parameteric_curve.zip > > > > -- > > > David Rutten > > > [email protected] > > > Robert McNeel & Associates
