How to make this kind of shape?

[Anonymous]

This shape is made in Sketch up.But I can not figure out how to make it in the revit.

[Eduardo2012 · Accepted solution]

Pretty easy as a mass.

1.-Open a new conceptual mass.

2.-Go to the south elevation and create an inclined reference plane. This plane will have the incline angle of your top ellipse. Give this plane a name, such as "incline"

3.-Go to your 3D view and draw an ellipse "model line", make sure you specify "Level 1" as your work plane in the green options bar.

4.-Then do the same but specify "incline" as your work plane.

5.-Check your 3D view and Now you have the horizontal and the iclined ellipses

6.-Select both ellipses and choose "Create Form"

[constantin.stroescu · Accepted solution]

another method could be using a Solid Form and a substracted Void Form..as shown in my screencast:

[schlueter]

Hi,

let me join this topic with another shape.

I want to make a model of the Arturo Alvarez Kite light. I already tried to model it the way @constantin.stroescu mentioned.

Generic Model with Solid Form and a substracted Void Form.

But i nevert get a nice smooth surface. I always have those edges in it.

Than i tried conceptual mass like @Eduardo2012 mentioned. I thought its similar modelling like rhino or 3ds but i don't get very far.

First i made some referenc points and draw a spline on them. Than i created the forms on the spline. Got a nice Shape but now i dont know how to cut the edges. I need some kind of trim command but thats maybe not the way like revit works.

How would you do it?

Greetings

[constantin.stroescu]

It could be done also by using sphere cuted with Voids ...something like in my example....of course you ca use more parameters...

[RDAOU]

@schlueter

The above is more like simple massing...what you have is a step higher on the scale of complexity. Of course you can simplify it down to basic geometries but then your options would be limited...example: a cube cut by and inverse cone from the top and an inverse half sphere from the bottom. But then no matter how many parameters you add the final geometry will be limited to those geometries

Personally I would would use parametric wireframes. Convert the geometry into a skeleton and guided paths which can be translated into reference lines in Revit. Something similar to what has been posted on THIS POST HERE

Regardless; I wouldn't classify that lamp under geometries SIMILAR to that of the original post above 

[schlueter]

Thanks for the reply.

@constantin.stroescu

Haven't tought of that. But the shape is asymmetrical. So i think theres no chance with the sphere. But its another nice way for simple shapes.

@RDAOU

"Regardless; I wouldn't classify that lamp under geometries SIMILAR to that of the original post above "

First i thought this must be easy. But the more i try to creat this shape it gets more and more frustraiting. Ok i think i need some more revit training. 😞

Regards

[RDAOU]

@schlueter

It's not that hard just need a little bit of imagination.

One could produce a screencast with the basic construction...I unfortunately cannot do it today! I still have 90 mins drive to get back to Bremen and not sure I will be in the mood for Reviting...

You would still need to post ur question under a new thread since it's not related to the above OP 

[chrisplyler]

Instead of making the top with two crossing lines, make it with three parallel lines. Same for the bottom. Then add splines to the vertical corners and the four edges that don't yet have them, and make your side forms from the rectangles these form.

Then you can control your smoothed shape however you like. You could put in reference planes and constraints and parameters if you wanted.

[constantin.stroescu]

this is your file ......cuted with Voids....

[constantin.stroescu]

Developing the method exposed by Chrisplyler and RDAOU , you can make a Family with parameters that control the geometry of the velum...as in my following screencast.

Anyway this method becomes more complicated if you want to have a Spherical Cap....in this case I will use a sphere cut with Voids ....as in my first post...

[RDAOU]

Well since you guys seem to be persistant lol... What I had in mind or what i was refering to is something as follows.

[schlueter]

Thanks guys...

I appreciate your support. Looks awesome.

I tried some of your ways but i rly think i need more training with this kind of modelling. Looks so easy when you do it but i dont get it to work properly.

Need to book some lessons. Lets see what our cadtrainer can teach us 😄

Regards