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Clarify restrictions on fill patterns. #3789

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Clarify restrictions on fill patterns. #3789

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1 change: 1 addition & 0 deletions chapters/annotations.tex
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Expand Up @@ -925,6 +925,7 @@ \subsubsection{Graphical Properties}\label{graphical-properties}

The attributes \lstinline!HorizontalCylinder!, \lstinline!VerticalCylinder! and \lstinline!Sphere! specify gradients that represent a horizontal cylinder, a vertical cylinder and a sphere, respectively.
The gradient goes from line color to fill color.
The \lstinline!HorizontalCylinder! and \lstinline!VerticalCylinder! are only defined for rectangles and ellipses (not polygons), and \lstinline!Sphere! is only defined for ellipses.
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@HansOlsson HansOlsson Dec 5, 2025

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The \lstinline!HorizontalCylinder! and \lstinline!VerticalCylinder! are only defined for rectangles and ellipses (not polygons), and \lstinline!Sphere! is only defined for ellipses.
For polygons the gradients are defined on the enclosing rectangle (for \lstinline!HorizontalCylinder!, \lstinline!VerticalCylinder!) or circle (for \lstinline!Sphere!).

Trying to shortly explain how the gradients work for polygons, based on feedback.

As far as I understand "enclosing" generally means "smallest enclosing".
Note that it is subtly different that basing it on vertices (in case of splines) - as long as you don't do any weird extrapolation users will not notice.


The border pattern attributes \lstinline!Raised!, \lstinline!Sunken! and \lstinline!Engraved! represent frames which are rendered in a tool-dependent way --- inside the extent of the filled shape.

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