[Radiance-general] How to parse room dimensions from .rad model ?

[Vaib]

Thank you Rob! :)

Vaib


On 12 February 2014 23:44, Guglielmetti, Robert <
Robert.Guglielmetti at nrel.gov> wrote:

> Hi Vaib,
>
> Yes, that's generally how folks do it with Radiance, is rotate the sky to
> mimic an off-axis building footprint. It's done for the reasons you cite,
> as well as for efficiency in the octree. There are a few posts on this on
> the archives.
>
> - Googs
>
> From: Vaib <vaibhavjain.co at gmail.com<mailto:vaibhavjain.co at gmail.com>>
> Reply-To: Radiance discussion <radiance-general at radiance-online.org
> <mailto:radiance-general at radiance-online.org>>
> Date: Wednesday, February 12, 2014 at 3:34 PM
> To: Radiance discussion <radiance-general at radiance-online.org<mailto:
> radiance-general at radiance-online.org>>
> Subject: Re: [Radiance-general] How to parse room dimensions from .rad
> model ?
>
> Thank you Dr.Greg. It makes sense now.
>
> I am just curious to know your opinion on changing the site's North by
> rotating the Sky. Do you think it is a good practice? Because on rotating
> the building/room, one cannot take full advantage of other good programs
> such as getbbox and/or getinfo -d.
>
>
> On 12 February 2014 23:18, Greg Ward <gregoryjward at gmail.com<mailto:
> gregoryjward at gmail.com>> wrote:
> The size returned by "getinfo -d octree" is the cube side length, which is
> of course the same in all three dimensions.
>
> -Greg
>
>
> From: Vaib <vaibhavjain.co at gmail.com<mailto:vaibhavjain.co at gmail.com>>
>
> Date: February 12, 2014 2:08:22 PM PST
>
>
> getbbox will solve the issue at hand. Rooms/scenes are mostly right
> rectangular prism; and also they are normally kept aligned with principal
> axes, only the sky (if with sun) is rotated to change the North. I guess,
> to rotate the sky instead of the scene must be preferred for modeling
> architectural scenes in Radiance.
>
> Further, just out of curiosity: getinfo -d foo.oct gives [Xmin, Ymin,
> Zmin, Size] of the bounding cube (I guess cuboid too?). I couldn't figure
> what does Size mean? Is it Xmax or Y/Zmax?
>
> Thank you for your time!
>
> Best regards,
> Vaib
>
>
> On 7 February 2014 18:47, Greg Ward <gregoryjward at gmail.com<mailto:
> gregoryjward at gmail.com>> wrote:
> Yes, let's keep this on the general mailing list.  The dev list is
> primarily for development/debugging issues.
>
> The getbbox command will give you a tight box (right rectangular prism) on
> the entire scene, whereas oconv will report an enclosing cube.  However,
> this won't help you much if your space is non-rectangular or not
> axis-aligned.
>
> A general tool for extracting the walls from a room is technically the 3-D
> convex hull problem.  There are programs out there to compute this, but I
> haven't played with them.
>
> Best,
> -Greg
>
>
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