Last modified: 2023-11-12 14:27:59 JST (Japanese)

Koji Nakamaru

Research

• Koji Nakamaru and Yoshio Ohno,
  Breadth-First Ray Tracing Utilizing Uniform Spatial Subdivision,
  IEEE Transactions on Visualization and Computer Graphics, vol. 3, no. 4, pp. 316-328, October/December 1997.
  Abstract
  1997tvcg-breadth-first-ray-tracing-utilizing-uniform-spatial-subdivision.pdf
• Koji Nakamaru and Yoshio Ohno,
  Enhanced Breadth-First Ray Tracing,
  Journal of Graphics Tools, vol. 6, no. 4, pp. 13-28, 2001.
  Abstract
  2001jgt-enhanced-breadth-first-ray-tracing.pdf
  supplement materials (originally found at http://www.acm.org/jgt/papers/NakamaruOhno01)
• Koji Nakamaru and Yoshio Ohno,
  Ray Tracing for Curves Primitive,
  Journal of WSCG '2002 (WSCG '2002 conference proceedings), vol. 10, no. 2, pp. 311-316, February 2002.
  Abstract
  http://wscg.zcu.cz/wscg2002/Papers_2002/A83.pdf
  Errata:
  
  • Page 2, bottom right: If control points are placed non-uniformly in ray direction, the resulting v parameter may have a large margin of error because the algorithm computes v in 2D space. To compensate this, we should add a subexpression about z in the maximum depth computation. (Thanks to Emil Kirichev)
  • Page 4, Figure 5: "c" in "Vector p = c.evaluate(v);" should be the whole curve because "v" is computed for it. (Thanks to Emil Kirichev)
  • Page 4, Figure 5: "q.z" should be "p.z".
• Koji Nakamaru, Toru Matsuoka, and Masahiro Fujita,
  Distance Aware Ray Tracing for Curves,
  ACM SIGGRAPH 2012 Posters, Article No. 103, August 2012.
  Abstract
  2012siggraph-distance-aware-raytracing.pdf
• Koji Nakamaru,
  Ray Tracing for Massive Data,
  Dissertation Thesis, Keio University, 2002.
  thesis.pdf (in Japanese, 3.2MB)

Software/Tips

• aobench on WebCL aobench ported to WebCL.
• (NOTE: Andre Colomb polished further the following patch for psvn.el. Please check Re: [PATCH] Support SVN 1.7 working copies in psvn.el)
  psvn.el.new A quick fix for psvn.el, for supporting subversion 1.7. psvn.el.diff is a diff for the original. You can also utilize this psvn to enable vc by adding the following to your .emacs (the following works correctly on emacs 23.3.1).

  ;; cf. http://svn.haxx.se/dev/archive-2011-01/0369.shtml
  (require 'psvn)
  (require 'vc-svn)
  (defun vc-svn-registered (file)
    "Check if FILE is SVN registered."
  ;;  (when (file-readable-p (expand-file-name (concat vc-svn-admin-directory
  ;;                                                 "/entries")
  ;;                                         (file-name-directory file)))
    (when (my-file-directory-p (expand-file-name vc-svn-admin-directory
                                                 (file-name-directory file)))
      (with-temp-buffer
        (cd (file-name-directory file))
        (let* (process-file-side-effects
               (status
               (condition-case nil
                   ;; Ignore all errors.
                   (vc-svn-command t t file "status" "-v")
                 ;; Some problem happened.  E.g. We can't find an `svn'
                 ;; executable.  We used to only catch `file-error' but when
                 ;; the process is run on a remote host via Tramp, the error
                 ;; is only reported via the exit status which is turned into
                 ;; an `error' by vc-do-command.
                 (error nil))))
          (when (eq 0 status)
            (let ((parsed (vc-svn-parse-status file)))
              (and parsed (not (memq parsed '(ignored unregistered))))))))))
      

• lv451-variable-tab-width.diff A patch for lv, which enables "-xN" options for specifying the tab width N. N is limited from 1 to 8.
• Interactive imgTeX provides an interface to use imgTeX interactively.
• fv provides a HDRI (high dynamic range image) viewer, which utilizes OpenGL/GLUT for the display and the interface.
• java-help provides functions for browsing java documents from Emacs. It has several good points, though jde-help-symbol of JDEE is more powerful.
• Cygwin
  • Cygwin + X + Japanese Applications (in Japanese) provides several supplemental applications for Cygwin and X, especially for Japanese drawing tools.
  • Tips on cygwin (in Japanese) describes several tips, mainly about cygwin's emacs.
  • cyg-emacsclient is a wrapper for cygiwn emacsclient. This enables you to send files to cygwin emacs from Windows Explorer.
  • cyg-update provides a script for downloading and installing cygwin binaries.
• TeX, PostScript
  • acrolpr (in Japanese) provides a perl script for replacing /usr/bin/lpr in acroread print dialog.
  • dvipdfa (in Japanese) provides an ad-hoc (but effective) solution for dvipdfm, in order to prevent Japanese strings in EPS figures to be rendered into bitmaps.
  • epsrv (in Japanese) provides a perl script for changing colors in EPS file. The script is useful to prepare EPS files for slides.
  • fixeucfontaux (in Japanese) provides a perl script to fix japanized idraw (jiv) files.
  • imgTeX provides yet another math-on-the-web solution.
  • ps2epsfiles: provides a perl script for converting PS files into multiple, separated EPS files. It especially targets PS files generated by printing PowerPoint documents.
  • psfindpages: shows which pages in PostScript are gray/color.
  • replacecjkfonts, cjkps2pdf (in Japanese) provides perl scripts for replacing CID fonts embedded in gs-generated PDF files.
  • How to display metapost-figures with xdvi (in Japanese) provides a method for displaying metapost figures with xdvi.
• tgrep (in Japanese) provides a ruby script to search a string over multiple lines.
• Microsoft Word
  • How to prevent auto-correction by MSWord (in Japanese) provides the settings for preventing auto-correction.
  • How to add the button for creating layout frames (in Japanese) provides the settings for the button for creating layout frames.
• VizSort: visualizes several sort algorithms with Flash.