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*Subject*: **Re: [office] right-angled-axes: was Re: [office] proposals for charts:reverse-direction, right-angled-axes, group-bars-per-axis**

*From*:**Lars Oppermann <Lars.Oppermann@Sun.COM>***To*: office@lists.oasis-open.org*Date*: Mon, 26 Feb 2007 13:10:37 +0100

Patrick Durusau wrote: >> Right-angled-axes >> ... >> > Does this have the same effect as the dr3d:projection attribute found in > 9.4.1 Scene? > > Noting that 9.4.1 is cited by the current 10.5.1. Here is some more explanation from the chart team... It's different in effect but related. Having dr3d:projection set to parallel makes 'parallel' lines. Setting chart:right-angled-axes to true should produce right angles. But in fact if setting right-angled-axes to true the values for dr3d:projection would be ignored. So one could think of expanding the values for dr3d:projection offering an additional value 'right-angled' or similar. dr3d:projection is parallel or perspective, the basic viewing modes for 3d projection (there are some more in the parallel tree, see Foley et al). When You look at a 3d scene from the front and use non-rotated objects, the Lines of the shapes which are parallel to X and Y respectively will build a right angle in parallel and perspective projection mode. I think the 'right-angled' has nothing to do with the perspective projection mode, but with the orientations used in the scene geometry itself. This is no new mode for perspective projections. Remember: this is the mathematical projection between the camera coordinate system and the 2d view coordinate system. -- Lars Oppermann <lars.oppermann@sun.com> Sun Microsystems Software Engineer Nagelsweg 55 Phone: +49 40 23646 959 20097 Hamburg, Germany Fax: +49 40 23646 550 http://www.sun.com/staroffice

**Follow-Ups**:**Re: [office] right-angled-axes: was Re: [office] proposals for charts:reverse-direction, right-angled-axes, group-bars-per-axis***From:*Patrick Durusau <patrick@durusau.net>

**References**:**proposals for charts: reverse-direction, right-angled-axes,group-bars-per-axis***From:*Lars Oppermann <Lars.Oppermann@Sun.COM>

**right-angled-axes: was Re: [office] proposals for charts: reverse-direction,right-angled-axes, group-bars-per-axis***From:*Patrick Durusau <patrick@durusau.net>

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