autocad irregular shaped walls problem

[Jonathan]

Ive been trying to give some solidity to a group of 3d faces that make up the facade of a building. Im having trouble, does anyone have any suggestions? As soon as I extrude I loose the surface. I have attached an image of the drawing.

 

Thanks

[Adeyemi]

Johnnyk, you are not as explicit at to really understand the major problem. I would suggest you attach the autocad file instead of the pdf copy. However, I know that if you work in autocad 3d environment, unclosed splines or ordinary LINES will/may not produce a solid element when extruded, rather it will be a face. Another thing you may want to explore is the face extrude option, which may not be the best option for clean modelling, as in your case. Let's explore your autocad file to see the major problem.

cheers

[Jonathan]

Hi,

 

Firstly thanks for your help, its appreciated.

 

I have tried to attach a dwg file to my post but with no success.

A little more info :-

 

I made geometry with ordinary lines then used 3dface. (a new command to me).

 

Thanks

again,

 

Johnny

[Adeyemi]

Another suggestion ; use a closed spline ( and not a line) for the outline and then use the extrude command ( note that extrude is different from extrude face) on it. As to the attachment issue, that seems really strange but maybe you should try to RAR OR ZIP it before attaching.

[Jonathan]

Hi,

 

Ive zipped the file and it seems to have worked.

[Adeyemi]

Now I see ,what you mean. This would have been easier for you to get done in ,max and the likes ! But since the focus is on an autocad 3d process, this is what I have done.

1. Using the line frames as in your .dwg file, take a side in an isometric view

2. Next is for you to be able to establish a spline of this same shape. You may have to do it one by one

3. Open the UCS tool and pick 3 point UCS option, specify new origin point, specify point on positive portion of X- axis and also specify point on positive portion of Y- axis. NOTE: The above is just a technical explanation, all what this means to you is to pick the three points on a typical ‘angular’ triangular face as in the case of your drawings.

4. By doing this, autocad will see the ‘slanting’ triangle as a coordinate then you have to trace with polyline .

5. Repeat this process from 2-4 to all other intended triangular face. Remember they are all on different planes and coordinates so you have to establish an individual UCS for them with the 3 point UCS tool.

6. At the end you will have all your faces as closed individual polyline ‘slanting’ triangles.

7. Extrude each polylines to any thicknes suitable to you. Remember ‘extrude’ and not extrude face.

8. After extruding the individual triangles you may wish to make it one entity through the union tool.

Check attached, I did three faces of 150mm thickness for experimenting.

cheers

[Jonathan]

Thanks so much,

 

As soon as I get a minute Ill give it a go.

 

Cheers

 

Johnny

[Jonathan]

Unfortunatly extruding polylines creates a similar problem. The extrusion is to the angle of the triangular shape which means corners no longer meet. Do you know if it is possible to extrude to world x axis?

 

Thanks agin

 

Johnny

[ronll]

I haven't looked at your files, but just off the top of my head, can you try first setting the UCS so that the Z is in the direction you want to extrude. Do this before you create the lines or plines you wish to extrude.

[Jonathan]

Hi,

 

Thanks for your reply.

 

Does my z axis not need to be set to the geometry in the first place to make polylines?