Isometric Viewport Scaling

[David Bethel]

Greetings

 

On these types of 8.5 x 11 submittal drawings, we scale the plan, front and side viewports. The viewports are made based on the equipment size plus 0.5" space on all sides.

 

The isometrics viewports are dynamic base on the plan view viewport size ( each one is 1/2 of the remaining s-s space, same as the plan view t-b )

 

Does anyone know if there is a known way of insuring that the isometric is centered AND entirely visible in the viewport. The end result would be in TILEMODE 0 MSPACE ZOOM _C and then a scale factor

 

Known values

Equipment x y & z extent sizes

Equipment center point

Isometric View Direction ( either 1,-2,1 or -1,2,1 )

Viewport X and Y Sizes

 

It is very easy to crop part of the view with an incorrect scale factor. I'm open to any ideas. TIA -David

[SuperCAD]

You can position the views in a viewport anyway you want to as long as they aren't locked. Just eyeball it to get it centered, or draw some reference lines go to by. As far as scaling an iso viewport, scale it to whatever fits but make sure that you put a NTS (not to scale) note there (since you can't measure in isometric with a typical ruler).

 

All of the iso's that we put in a set are labeled as NTS, even though we may use a specific scale to fit it properly.

[David Bethel]

Thanks,

 

The problem is that this is an automated process for hundreds of submittals at once, so eyeballing it isn't quite the option we are looking for.

 

It' looking more like a layer manipulation problem. Layers that are VPLAYER frozen layers are still being considered with EXTMIN and EXTMAX. I think anyway -David

[Car5858]

I think you can also convert the Isometric drawing to a block, with the pick point in the center of the drawing. Then insert the block and scale to fit as needed.

[LEsq]

I am reading 'view' - are you using views?... you can set a view into a viewport and then set the scale.

[David Bethel]

Ok, I think that I have figured it out.

 

When viewing model space thru a paper space viewport, acad calculates the extents based on vplayer Frozen layers as being the same as OFF layers. They are included in the extents even though they are not displayed.

 

The work around is the actually freeze all unnecessary layers in the viewport, then zoom the extents and then calculate the center point and extents. Next zoom to the center and use (getvar "VIEWSIZE") as the max scale.

 

Makes sense to me anyway. Thanks -David