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Overview
| Comment: | pixel_robot: Added the `ptn` template tag shortname for dither patterns to the documentation. |
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| Timelines: | family | ancestors | descendants | both | trunk |
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| SHA3-256: |
7ab9111cc0605c6f03ecc17425d84cbd |
| User & Date: | andy 2025-04-21 17:36:44 |
Context
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2025-04-21
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| 17:37 | pixel_window: Added sprite_batch and friends (not functioning yet). check-in: 8f0fb2f93b user: andy tags: trunk | |
| 17:36 | pixel_robot: Added the `ptn` template tag shortname for dither patterns to the documentation. check-in: 7ab9111cc0 user: andy tags: trunk | |
| 17:36 | pixel_window: Added a method to texture_atlas to find images (node*) by name. check-in: 740d13a011 user: andy tags: trunk | |
Changes
Changes to pixel_robot/doc/tex/patterns.tex.
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refers (directly or indirectly) to itself will halt script processing
with an error. (\texttt{vpal{[}{]}} does a similar check when a virtual
palette entry is replaced.)
Note that this process only applies when a pattern is \emph{drawn}, not
when its index is placed into an image:
| | | | | 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 |
refers (directly or indirectly) to itself will halt script processing
with an error. (\texttt{vpal{[}{]}} does a similar check when a virtual
palette entry is replaced.)
Note that this process only applies when a pattern is \emph{drawn}, not
when its index is placed into an image:
\begin{prCode}[emph={p}]
line(..., p); // May trigger recursion
// Does not trigger recursion, until the image is rendered.
vpal[12] = p;
line(..., 12);
\end{prCode}
Pattern indexes placed into the main canvas are \emph{drawn} when the
animation is rendered. Pattern indexes placed into \texttt{Image}s are
\emph{drawn} when the \texttt{Image} is blitted (not stamped) onto the
main canvas or another \texttt{Image}.
|
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\end{prCode}
would give a 4 × 4 pattern consisting of alternating horizontal lines.
The (optional) \texttt{ox,oy} parameters give the origin for the
pattern's tiling.
NOTE: \texttt{raw\_sample()} for the dither pattern only ever returns
0 or 1, never fractional values.
\item
\texttt{random()} -- Every pixel is a random color from the chosen
range.
| > > > > > > | 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 |
\end{prCode}
would give a 4 × 4 pattern consisting of alternating horizontal lines.
The (optional) \texttt{ox,oy} parameters give the origin for the
pattern's tiling.
For convenience, the syntax
\begin{prCode}[emph={name}]
ptn`name`
\end{prCode}
can be used to easily create a named dither pattern.
NOTE: \texttt{raw\_sample()} for the dither pattern only ever returns
0 or 1, never fractional values.
\item
\texttt{random()} -- Every pixel is a random color from the chosen
range.
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