121 |
in all cases, the irregular shape of the viewport matches the shape of an |
in all cases, the irregular shape of the viewport matches the shape of an |
122 |
actual irregular object |
actual irregular object |
123 |
|
|
|
--- |
|
|
|
|
|
In diagrams and engineering drawings, tearing... |
|
|
has been used to show that an object extends beyond |
|
|
the part that is drawn. |
|
|
|
|
|
|
|
|
--- |
|
|
|
|
124 |
Windowing systems usually non-photorealistic. Clearer, etc. |
Windowing systems usually non-photorealistic. Clearer, etc. |
125 |
However, the understanding of non-photorealism has been developing |
However, the understanding of non-photorealism has been developing |
126 |
only recently... more photorealism could be distracting... too much |
only recently... more photorealism could be distracting... too much |
173 |
\centering |
\centering |
174 |
\fbox{\vbox{\vskip 3in}} |
\fbox{\vbox{\vskip 3in}} |
175 |
\caption{ |
\caption{ |
176 |
|
\label{fig-breakout} |
177 |
a) Break out lines, b) a break out section. |
a) Break out lines, b) a break out section. |
178 |
Freehand lines have been long used in engineering drawings |
Freehand lines have been long used in engineering drawings |
179 |
to indicate that an object extends beyond the shown part. |
to indicate that an object extends beyond the shown part. |
182 |
|
|
183 |
In this article, we apply {\em break lines} or {\em break out section}s |
In this article, we apply {\em break lines} or {\em break out section}s |
184 |
from technical drawing to viewports. |
from technical drawing to viewports. |
185 |
|
Break lines or break out sections (see Fig.~\ref{fig-breakout}) |
186 |
|
are freehand lines drawn to indicate |
187 |
|
that an object extends beyond the drawn part. |
188 |
|
|
189 |
Instead of framing a part viewport to the canvas, |
Instead of framing a part viewport to the canvas, |
190 |
we tear a part of the canvas non-photorealistically. |
we tear a part of the canvas non-photorealistically. |
191 |
In the following sections, we first describe the reasons and design issues and |
In the following sections, we first describe the reasons and design issues and |