Hans
If it worked it would look cool, but remember this is a real-time 3D
rendering environment and lights are not rendered, they only affect the
colors of objects. Therefore you wouldn't see any difference if the light
direction was coincident with the viewer's -Z axis. If it isn't coincident
you might see some edge effects on one side of the object but it wouldn't
have the appearance I think people are looking for.
--Mark
At 06:21 PM 9/29/2000 +0200, you wrote:
>how about creating a light just a little behind the object, so that the
>object would always be between the light and the viewer.
>Would that look cool ?
>
>Hans
>
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>SUBJECT: Re: [JAVA3D] FW: [JAVA3D] border on polygons
>
>
>Daniel,
>
>This capability is already there, though it's a bit obfuscated now and the
>J3D team could help us out here--assuming that this workaround will work.
>
>The PolygonAttributes class allows you to define the rasterization of a
>polygon, in other words, how the polygon is represented on the screen. The
>options are:
>
>POLYGON_POINT - the polygon is rendered as points drawn at the vertices.
>POLYGON_LINE - the polygon is rendered as lines drawn between consecutive
>vertices.
>POLYGON_FILL - the polygon is rendered by filling the interior between the
>vertices. The default mode.
>
>You are essentially looking for a combination of POLYGON_FILL and
>POLYGON_LINE. This *is* something that is supported directly by OpenGL but
>for some reason J3D isn't supporting it.
>
>I think a workaround (SUN J3D TEAM PLEASE VERIFY) would be to
>
>1) Make a complete copy of your Shape3D and then
> - Set the Appearance of the original with PolygonAttributes to
>fill the polygons (default)
> - Set the Appearance of the copy with PolygonAttributes to draw
>the outlines.
>2) Set up your SceneGraph such that you can use a SharedGroup and an
>alternate appearance for the second instance of the Shape3D.
>
>Important note: You will likely run into issues with Z buffer tests when
>this occurs as the lines and the polygons will more than likely end up with
>the same Z value. Therefore you should be able to adjust your Z test and
>order the rendering of your Shape3D objects as appropriate.
>
>The bottom line is that J3D could change the polygonMode member of
>PolygonAttributes to hold multiple modes, not just a single one. Then
>everything would work with a single change of the PolygonAttributes.
>
>How about it Sun?
>
>At 11:06 AM 9/29/2000 -0400, you wrote:
> >Sorry. My original goal is to put borders around each polygon in a Shape3D.
>
>
>
>Mark Ferneau 240-462-6262 (cell)
>Director of Adv. Technology 801-437-4608 (efax)
>Xtivia Technologies, Inc. 732-469-5954 x629 (NJ office)
>[EMAIL PROTECTED] 301-279-5703 (home office)
>http://www.xtivia.com/ [EMAIL PROTECTED] (wireless email)
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Mark Ferneau 240-462-6262 (cell)
Director of Adv. Technology 801-437-4608 (efax)
Xtivia Technologies, Inc. 732-469-5954 x629 (NJ office)
[EMAIL PROTECTED] 301-279-5703 (home office)
http://www.xtivia.com/ [EMAIL PROTECTED] (wireless email)
===========================================================================
To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
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