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<a name="mglColor-class-1"></a>
<h2 class="section">9.3 mglColor class</h2>
<a name="index-mglColor"></a>

<p>Structure for working with colors. This structure is defined in <code>#include &lt;mgl2/type.h&gt;</code>.
</p>
<p>There are two ways to set the color in MathGL. First one is using of mreal values of red, green and blue channels for precise color definition. The second way is the using of character id. There are a set of characters specifying frequently used colors. Normally capital letter gives more dark color than lowercase one. See section <a href="mathgl_en_23.html#Line-styles">Line styles</a>.
</p>
<dl>
<dt><a name="index-r_002c-g_002c-b_002c-a-of-mglColor"></a><u>Parameter of mglColor:</u> <code>mreal</code> <b>r, g, b, a</b></dt>
<dd><p>Reg, green and blue component of color.
</p></dd></dl>

<dl>
<dt><a name="index-mglColor-on-mglColor"></a><u>Method on mglColor:</u> <code></code> <b>mglColor</b><i> (<code>mreal</code> R, <code>mreal</code> G, <code>mreal</code> B, <code>mreal</code> A=<code>1</code>)</i></dt>
<dd><p>Constructor sets the color by mreal values of Red, Green, Blue and Alpha channels. These values should be in interval [0,1].
</p></dd></dl>
<dl>
<dt><a name="index-mglColor-on-mglColor-1"></a><u>Method on mglColor:</u> <code></code> <b>mglColor</b><i> (<code>char</code> c=<code>'k'</code>, <code>mreal</code> bright=<code>1</code>)</i></dt>
<dd><p>Constructor sets the color from character id. The black color is used by default. Parameter <var>br</var> set additional &ldquo;lightness&rdquo; of color.
</p></dd></dl>
<dl>
<dt><a name="index-Set-on-mglColor"></a><u>Method on mglColor:</u> <code>void</code> <b>Set</b><i> (<code>mreal</code> R, <code>mreal</code> G, <code>mreal</code> B, <code>mreal</code> A=<code>1</code>)</i></dt>
<dd><p>Sets color from values of Red, Green, Blue and Alpha channels. These values should be in interval [0,1].
</p></dd></dl>
<dl>
<dt><a name="index-Set-on-mglColor-1"></a><u>Method on mglColor:</u> <code>void</code> <b>Set</b><i> (<code>mglColor</code> c, <code>mreal</code> bright=<code>1</code>)</i></dt>
<dd><p>Sets color as &ldquo;lighted&rdquo; version of color <var>c</var>.
</p></dd></dl>
<dl>
<dt><a name="index-Set-on-mglColor-2"></a><u>Method on mglColor:</u> <code>void</code> <b>Set</b><i> (<code>char</code> p, <code>mreal</code> bright=<code>1</code>)</i></dt>
<dd><p>Sets color from symbolic id.
</p></dd></dl>
<dl>
<dt><a name="index-Valid-on-mglColor"></a><u>Method on mglColor:</u> <code>bool</code> <b>Valid</b><i> ()</i></dt>
<dd><p>Checks correctness of the color.
</p></dd></dl>
<dl>
<dt><a name="index-Norm-on-mglColor"></a><u>Method on mglColor:</u> <code>mreal</code> <b>Norm</b><i> ()</i></dt>
<dd><p>Gets maximal of spectral component.
</p></dd></dl>
<dl>
<dt><a name="index-operator_003d_003d-on-mglColor"></a><u>Method on mglColor:</u> <code>bool</code> <b>operator==</b><i> (<code>const mglColor &amp;</code>c)</i></dt>
<dt><a name="index-operator_0021_003d-on-mglColor"></a><u>Method on mglColor:</u> <code>bool</code> <b>operator!=</b><i> (<code>const mglColor &amp;</code>c)</i></dt>
<dd><p>Compare with another color
</p></dd></dl>

<dl>
<dt><a name="index-operator_002a_003d-on-mglColor"></a><u>Method on mglColor:</u> <code>bool</code> <b>operator*=</b><i> (<code>mreal</code> v)</i></dt>
<dd><p>Multiplies color components by number <var>v</var>.
</p></dd></dl>

<dl>
<dt><a name="index-operator_002b_003d-on-mglColor"></a><u>Method on mglColor:</u> <code>bool</code> <b>operator+=</b><i> (<code>const mglColor &amp;</code>c)</i></dt>
<dd><p>Adds color <var>c</var> component by component.
</p></dd></dl>

<dl>
<dt><a name="index-operator_002d_003d-on-mglColor"></a><u>Method on mglColor:</u> <code>bool</code> <b>operator-=</b><i> (<code>const mglColor &amp;</code>c)</i></dt>
<dd><p>Subtracts color <var>c</var> component by component.
</p></dd></dl>


<dl>
<dt><a name="index-operator_002b-3"></a><u>Library Function:</u> mglColor <b>operator+</b><i> (<code>const mglColor &amp;</code>a, <code>const mglColor &amp;</code>b)</i></dt>
<dd><p>Adds colors by its RGB values.
</p></dd></dl>
<dl>
<dt><a name="index-operator_002d-3"></a><u>Library Function:</u> <code>mglColor</code> <b>operator-</b><i> (<code>const mglColor &amp;</code>a, <code>const mglColor &amp;</code>b)</i></dt>
<dd><p>Subtracts colors by its RGB values.
</p></dd></dl>
<dl>
<dt><a name="index-operator_002a-3"></a><u>Library Function:</u> <code>mglColor</code> <b>operator*</b><i> (<code>const mglColor &amp;</code>a, <code>mreal</code> b)</i></dt>
<dt><a name="index-operator_002a-4"></a><u>Library Function:</u> <code>mglColor</code> <b>operator*</b><i> (<code>mreal</code> a, <code>const mglColor &amp;</code>b)</i></dt>
<dd><p>Multiplies color by number.
</p></dd></dl>
<dl>
<dt><a name="index-operator_002f-2"></a><u>Library Function:</u> <code>mglColor</code> <b>operator/</b><i> (<code>const mglColor &amp;</code>a, <code>mreal</code> b)</i></dt>
<dd><p>Divide color by number.
</p></dd></dl>
<dl>
<dt><a name="index-operator_0021"></a><u>Library Function:</u> <code>mglColor</code> <b>operator!</b><i> (<code>const mglColor &amp;</code>a)</i></dt>
<dd><p>Return inverted color.
</p></dd></dl>


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