/[gzz]/gzz/Documentation/Manuscripts/Irregu/irregu.tex
ViewVC logotype

Diff of /gzz/Documentation/Manuscripts/Irregu/irregu.tex

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 1.131 by tjl, Mon Dec 2 00:47:27 2002 UTC revision 1.132 by tjl, Mon Dec 2 01:12:01 2002 UTC
# Line 30  Line 30 
30  }}  }}
31    
32  \abstract{  \abstract{
33  We propose non-photorealistic tearing as an  We apply break lines from technical drawing
34    as an
35  alternative to the ubiquitous rectangular frames  alternative to the ubiquitous rectangular frames
36  in user interfaces.  When showing a piece of a  in user interfaces.  
37  larger paper, the torn edges naturally indicate  When showing a piece of a
38    larger canvas, the non-photorealistically torn edges naturally indicate
39  where the content extends.  We show how the shape  where the content extends.  We show how the shape
40  of the jagged edge can be tied to its location on  of the jagged edge can be tied to its location on
41  the paper; this creates a natural rippling motion  the paper; this creates a natural rippling motion
42  when the edge moves in relation to the paper.  when the edge moves in relation to the paper.
43  As a bonus, visually un-ambiguous  The jagged edge is also visually less ambiguous than
44    the straight horizontal and vertical lines and
45    can be used to provide a
46  Visualizing relations in Focus+Contex views.  sense of scale to the user.
47    
48  Sense of scale  We show how suitably rippling break lines can be implemented
49    on the NV10 and NV25 architectures, and show screenshots
50    of example user interfaces.
51  }  }
52    
53    
# Line 182  The irregular windows are not used as vi Line 186  The irregular windows are not used as vi
186  since they always show the whole irregular object,  since they always show the whole irregular object,
187  not only part of it.  not only part of it.
188    
 \cite{bjork02windowframes}  
189    
190  % ---  % ---
191  %  %
# Line 311  irregular edges make it easier to unders Line 314  irregular edges make it easier to unders
314  ends and where there is simply a line inside a viewport; see  ends and where there is simply a line inside a viewport; see
315  e.g.~Fig.\ref{figbreakout}.  e.g.~Fig.\ref{figbreakout}.
316    
317  XXX Fourier viewpoint  % XXX Fourier viewpoint
318  frequencies: only low/high in frames  % frequencies: only low/high in frames
319    
320  One thing that we hope to achieve is that instead of having to perceive  One thing that we hope to achieve is that instead of having to perceive
321  two objects, the ``hole'' of the viewport and the the canvas behind,  two objects, the ``hole'' of the viewport and the the canvas behind,
# Line 321  However, whether this can is achieved re Line 324  However, whether this can is achieved re
324    
325  Additionally, the motion of the uneven edge can be used to give the  Additionally, the motion of the uneven edge can be used to give the
326  user a cue about the motion of the viewport, and  user a cue about the motion of the viewport, and
327  the style and size of the ripples can give a cue about the scale of the view.  the style and size of the ripples can give a cue about the scale of the view
328    (window frames have also been used for visualization previously\cite{bjork02windowframes}).
329    
330    
331  % The important difference is that  % The important difference is that
# Line 377  the shape should remain the same: see Fi Line 381  the shape should remain the same: see Fi
381  \centering  \centering
382  \includegraphics{motion.ps}\\  \includegraphics{motion.ps}\\
383  \caption{\label{figmotion}  \caption{\label{figmotion}
384  XXX: motion  A diagrammatic representation of the motion of a torn viewport.
385    The edges parallel to the direction of motion remain still while the
386    moving edges change their shape.
387  }  }
388  \end{figure}  \end{figure}
389    
# Line 581  solid shapes. Line 587  solid shapes.
587    
588  \label{secshape}  \label{secshape}
589    
 XXX figs for all these shapes!  
   
590  When the tear-out reaches the edge of canvas, the smooth  When the tear-out reaches the edge of canvas, the smooth
591  canvas border should be drawn instead of the parts of the tear-out  canvas border should be drawn instead of the parts of the tear-out
592  shape extending outside the canvas.  shape extending outside the canvas.
# Line 610  falls off linearly with distance. The ha Line 614  falls off linearly with distance. The ha
614  the value of such a texture and a noise texture and using that (through  the value of such a texture and a noise texture and using that (through
615  alpha test) as a condition for drawing the fragment.  alpha test) as a condition for drawing the fragment.
616    
617  [ XXX: OpenGL 1.3 or GL\_EXT\_texture\_env\_add required ]  % [ XXX: OpenGL 1.3 or GL\_EXT\_texture\_env\_add required ]
618    
619  We stress that this implementation is not necessarily any worse than  We stress that this implementation is not necessarily any worse than
620  the offset texture implementation:  the offset texture implementation:
# Line 875  for different angles, Line 879  for different angles,
879  but can be approximated by storing the offsets at a discrete set  but can be approximated by storing the offsets at a discrete set
880  of orientations in different components of a texture and interpolating  of orientations in different components of a texture and interpolating
881  by calculating dot products.  by calculating dot products.
882  This approximation is not completely free of artifacts (FIG),  This approximation is not completely free of artifacts,
883  but is sometimes acceptable and is fast to draw.  but is sometimes acceptable and is fast to draw.
884    
885  Non-photorealistic line width scaling can be obtained by computing  Non-photorealistic line width scaling can be obtained by computing
# Line 934  will exactly compensate the reduced line Line 938  will exactly compensate the reduced line
938  Note that this only holds when offsetting in the normal direction.  Note that this only holds when offsetting in the normal direction.
939  Also, derivative discontinuities are sometimes visible  Also, derivative discontinuities are sometimes visible
940  as spikes in the border, if the border is more  as spikes in the border, if the border is more
941  than a few pixels wide. FIG  than a few pixels wide.
942    
943  This trick only works if the line texture is 2D, but its other dimension can  This trick only works if the line texture is 2D, but its other dimension can
944  be 1.  be 1.

Legend:
Removed from v.1.131  
changed lines
  Added in v.1.132

savannah-hackers-public@gnu.org
ViewVC Help
Powered by ViewVC 1.1.26