AccuRender nXt

advanced rendering for AutoCAD

MATERIAL MAPPING

I am lost trying to map material to some brick window sills in a curved wall. The ACAD mapping gizmo (via nXt) is not my friend...Any help would be appreciated. Stripped down ACAD file attached. - Thanks, John

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Permalink Reply by Marc Chaumier on July 14, 2011 at 5:53pm
Acad mapping gizmo has no friend... He does what he want, almost anything to help you. Acad mapping gizmo is a bad a--... But I'll take a look...
Permalink Reply by John Ferris on July 15, 2011 at 5:51am
I try and avoid him, but do occasionally get caught in an dark alley with him - it's not pretty. Peter has an adequate solution below. Thanks...
Permalink Reply by Peter Milner on July 15, 2011 at 1:43am

As the curves are only very slight, use Accurender's quick mapping. Select 3 points and use Planar mapping.

Drawing attached.

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Permalink Reply by John Ferris on July 15, 2011 at 5:55am

Thanks Peter. I had tried the quick mapping but the results were poor. Example attached. What points/rotation did you use?

John

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Permalink Reply by Peter Milner on July 15, 2011 at 6:14am

Quick mapping - select object - origin point 1 - lower right point 2 - upper left point 3 - rotation 0 - mapping type planar.

Permalink Reply by John Ferris on July 15, 2011 at 6:20am
Helpful...Thanks Peter.
Permalink Reply by Marc Chaumier on July 15, 2011 at 9:44am

Thanks Peter, it works about right. But I don't understand exactly what I do, when I do that. Could you explain, if you got the time. One direction follow the curve, but the other don't converge on the center of the curve. And you apply the plan mapping on the vertical side of the object; and it's applied on the horizontal side, as would do the box mapping... Total mystery for my two neurones ...

Permalink Reply by Peter Milner on July 18, 2011 at 1:37am

By using planar mapping the material is mapped flat between the point (1-2 = X, 1-3 = Y).

The material is then effectively extruded through the object to the other side, so giving the lines on the top.

Permalink Reply by Marc Chaumier on July 18, 2011 at 2:28am

Thanks Peter. So the material is not mapped on the top of the object, as I believed. It's an extrusion of the vertical map. An usual plan mapping. Satisfying if you look from a far point, but if you look closer...

One more time, we need a true mapping tool!!! God, please...

Permalink Reply by Peter Milner on July 18, 2011 at 2:47am

A lot of the restrictions are to do with AutoCAD rather than Accurender.

However, AutoCAD now has Nurbs surfacing. Is this not similar to Rhino and so should make UV mapping possible.

Permalink Reply by Marc Chaumier on July 18, 2011 at 3:22am

Sometimes I dream that NXT could fill the lacks of acad. It does, in some cases. The cylindric mapping is a big problem in acad (for me). I have to study the functioning of these new tools... If I find the time...

Thanks anyway Peter for the time you find to help the people here.

Permalink Reply by Roy Hirshkowitz on July 18, 2011 at 7:07am

I'd probably just build the bricks for this one.  It wouldn't take more than five or ten minutes to do with solids and the additional load would be negligible.

AutoCAD does not have UV mapping-- the .obj and .3ds "Textured Mesh" widget uses a custom object to get around this.

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