Modeling from equation

[lsskys]

I'm trying to make a model of an ellipsoid which I have the equation for in the form of x^2/A^2 + y^2/B^2 + z^2/C^2 = 1. I searched the forums but could not find anything. Any help would be appreciated.

-Alex

 

[jeff4136]

Can't help you with the equation.
Try ...
Variable Section Sweep.
Constant section normal direction.
Trajectories and section are conic curves,
90 degrees included angle, rho = sqrt(2)-1.



2007-02-10_230540_ellipsoid_wf2.prt.zip

 

[lsskys]

Any ideas?

 

[jeff4136]

menu: Help -> What's This?
menu: Insert -> Advanced -> Blend from File -> Surface

 

[lsskys]

thanks, that seems like a good start.

i currently have my equations in mathematica, is there any easy to way to create a file which the belnd from file function of pro/e will understand? it looks like it takes IBL, IGES, and VDA

 

[jeff4136]

Sorry, knowing the menu picks is as far as my experiencetakes me.
I do have reservations about it's usefulness for your purposes, though.
The ellipsoid, done as a single surface, will have polar singularities.
Similar to a revolved sphere. As the function is called "Blend ..."
I wonder if it's going to be able to create either one, or to take it
further, create anything other than an open four sided surface?

 

[wsylvester]

you can create the ellispoid with 3 curves to drive5 curves by equation


one curve is the 360 degree ellipse;


i named the first 3 curves dims; major,minor, and ht


ratio=minor/major
x=major*cos(t*360)
y=major*sin(t*360)*ratio


the other are 180 degree sections; same type eq's cept 180 degrees if you try 3 eq, you get a nasty seam


boundry blend > first direction.. the 360 ..2nd direction the other 4 curves


solidify...then you can size with your 1st 3 curves

 

[wsylvester]

View attachment 3143

 

[lsskys]

i made my 5 curves and tried to boundry blend them but i'm getting an error "the curves do not form a loop"

View attachment 3145

 

[wsylvester]

it's more than likey your pick order of the 4 curves in the 2nd directionView attachment 3146

 

[wsylvester]

but there again...I am driving the equations with the values of the first three dat curves...straight line..major,minor & ht

 

[lsskys]

it's working well, thanks a lot ... is there anyway to make it a solid?

Edited by: lsskys

 

[wsylvester]

yes, select the surface...either by model tree or pick it and then it's edit> solidify