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.\" RCSid "$Id: xshowtrace.1,v 1.3 2004/01/01 19:31:45 greg Exp $"
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.TH XSHOWTRACE 1 11/15/93 RADIANCE
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.SH NAME
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xshowtrace - interactively show rays traced on RADIANCE image under X11
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.SH SYNOPSIS
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.B xshowtrace
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[
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.B \-s
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][
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.B \-T
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][
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.B "rtrace options"
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]
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.B octree
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.B picture
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.SH DESCRIPTION
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.I Xshowtrace
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takes a RADIANCE octree and a picture file
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and displays it on an X11 window server using
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.I ximage(1).
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The picture should have been created from a previous
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.I rpict(1)
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or
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.I rvu(1)
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calculation using the given octree.
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Once the image is displayed, the user can use the 't' command of
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.I ximage
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to select points on the image to display the ray tree.
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.I Rtrace
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then produces a ray tree, which
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.I xshowtrace
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will display (in red on a color screen).
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The
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.I \-s
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option slows the display of each ray traced to make it easier to
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follow the process.
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The
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.I \-T
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option traces rays to light sources, which are normally hidden.
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.SH AUTHOR
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Greg Ward
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.SH BUGS
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If the pointer is moved between the time 't' is pressed and
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.I xshowtrace
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starts drawing rays, the rays will be displaced.
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.SH "SEE ALSO"
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oconv(1), rpict(1), rtrace(1), rvu(1), ximage(1)
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