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<a name="Module:Scientific.Visualization.Color"><h1>Module Scientific.Visualization.Color</h1></a>
<p>This module provides color definitions that are used in the modules
VRML, VRML2, and VMD.
</p>
<hr width=70%>
<h2>Functions</h2>
<ul>
<li> <p>
<a name="Function:Scientific.Visualization.Color.ColorByName"><b><i>ColorByName</i></b>(<i>name</i>)</a><br>
</p>
<p>Returns a Color object corresponding to <i>name</i>. The known names
are black, white, grey, red, green, blue, yellow, magenta, cyan,
orange, violet, olive, and brown. Any color can be prefixed by
"light " or "dark " to yield a variant.
</p></ul>
<hr width=70%>
<a name="Class:Scientific.Visualization.Color.Color"><h2>Class Color: RGB Color specification</h2></a>
<p>Constructor: Color(<i>rgb</i>), where <i>rgb</i> is a sequence of three numbers
between zero and one, specifying the red, green, and blue intensities.</p>
<p>Color objects can be added and multiplied with scalars.
</p>
<hr width=70%>
<a name="Class:Scientific.Visualization.Color.ColorScale"><h2>Class ColorScale: Mapping of a number interval to a color range</h2></a>
<p>Constructor: ColorScale(<i>range</i>), where <i>range</i> can be a tuple of
two numbers (the center of the interval and its width), or a
single number specifying the widths for a default center of zero.</p>
<p>Evaluation: colorscale(<i>number</i>) returns the Color object
corresponding to <i>number</i>. If <i>number</i> is outside the
predefined interval, the closest extreme value of the interval
is used.</p>
<p>The color scale is blue - green - yellow - orange - red.
</p>
<hr width=70%>
<a name="Class:Scientific.Visualization.Color.SymmetricColorScale"><h2>Class SymmetricColorScale: Mapping of a symmetric number interval to a color range</h2></a>
<p>Constructor: SymmetricColorScale(<i>range</i>), where <i>range</i> is a
single number defining the interval, which is -|range| to <i>range</i>.</p>
<p>Evaluation: colorscale(<i>number</i>) returns the Color object
corresponding to <i>number</i>. If <i>number</i> is outside the
predefined interval, the closest extreme value of the interval
is used.</p>
<p>The colors are red for negative numbers and green for positive
numbers, with a color intensity proportional to the absolute
value of the argument.
</p>
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