<div class="refentry" lang="en" xml:lang="en"><a id="glColor"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glColor — set the current color</p></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor3b</b>(</code></td><td>GLbyte  </td><td><var class="pdparam">red</var>, </td></tr><tr><td> </td><td>GLbyte  </td><td><var class="pdparam">green</var>, </td></tr><tr><td> </td><td>GLbyte  </td><td><var class="pdparam">blue</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor3s</b>(</code></td><td>GLshort  </td><td><var class="pdparam">red</var>, </td></tr><tr><td> </td><td>GLshort  </td><td><var class="pdparam">green</var>, </td></tr><tr><td> </td><td>GLshort  </td><td><var class="pdparam">blue</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor3i</b>(</code></td><td>GLint  </td><td><var class="pdparam">red</var>, </td></tr><tr><td> </td><td>GLint  </td><td><var class="pdparam">green</var>, </td></tr><tr><td> </td><td>GLint  </td><td><var class="pdparam">blue</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor3f</b>(</code></td><td>GLfloat  </td><td><var class="pdparam">red</var>, </td></tr><tr><td> </td><td>GLfloat  </td><td><var class="pdparam">green</var>, </td></tr><tr><td> </td><td>GLfloat  </td><td><var class="pdparam">blue</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor3d</b>(</code></td><td>GLdouble  </td><td><var class="pdparam">red</var>, </td></tr><tr><td> </td><td>GLdouble  </td><td><var class="pdparam">green</var>, </td></tr><tr><td> </td><td>GLdouble  </td><td><var class="pdparam">blue</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor3ub</b>(</code></td><td>GLubyte  </td><td><var class="pdparam">red</var>, </td></tr><tr><td> </td><td>GLubyte  </td><td><var class="pdparam">green</var>, </td></tr><tr><td> </td><td>GLubyte  </td><td><var class="pdparam">blue</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor3us</b>(</code></td><td>GLushort  </td><td><var class="pdparam">red</var>, </td></tr><tr><td> </td><td>GLushort  </td><td><var class="pdparam">green</var>, </td></tr><tr><td> </td><td>GLushort  </td><td><var class="pdparam">blue</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor3ui</b>(</code></td><td>GLuint  </td><td><var class="pdparam">red</var>, </td></tr><tr><td> </td><td>GLuint  </td><td><var class="pdparam">green</var>, </td></tr><tr><td> </td><td>GLuint  </td><td><var class="pdparam">blue</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor4b</b>(</code></td><td>GLbyte  </td><td><var class="pdparam">red</var>, </td></tr><tr><td> </td><td>GLbyte  </td><td><var class="pdparam">green</var>, </td></tr><tr><td> </td><td>GLbyte  </td><td><var class="pdparam">blue</var>, </td></tr><tr><td> </td><td>GLbyte  </td><td><var class="pdparam">alpha</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor4s</b>(</code></td><td>GLshort  </td><td><var class="pdparam">red</var>, </td></tr><tr><td> </td><td>GLshort  </td><td><var class="pdparam">green</var>, </td></tr><tr><td> </td><td>GLshort  </td><td><var class="pdparam">blue</var>, </td></tr><tr><td> </td><td>GLshort  </td><td><var class="pdparam">alpha</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor4i</b>(</code></td><td>GLint  </td><td><var class="pdparam">red</var>, </td></tr><tr><td> </td><td>GLint  </td><td><var class="pdparam">green</var>, </td></tr><tr><td> </td><td>GLint  </td><td><var class="pdparam">blue</var>, </td></tr><tr><td> </td><td>GLint  </td><td><var class="pdparam">alpha</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor4f</b>(</code></td><td>GLfloat  </td><td><var class="pdparam">red</var>, </td></tr><tr><td> </td><td>GLfloat  </td><td><var class="pdparam">green</var>, </td></tr><tr><td> </td><td>GLfloat  </td><td><var class="pdparam">blue</var>, </td></tr><tr><td> </td><td>GLfloat  </td><td><var class="pdparam">alpha</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor4d</b>(</code></td><td>GLdouble  </td><td><var class="pdparam">red</var>, </td></tr><tr><td> </td><td>GLdouble  </td><td><var class="pdparam">green</var>, </td></tr><tr><td> </td><td>GLdouble  </td><td><var class="pdparam">blue</var>, </td></tr><tr><td> </td><td>GLdouble  </td><td><var class="pdparam">alpha</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor4ub</b>(</code></td><td>GLubyte  </td><td><var class="pdparam">red</var>, </td></tr><tr><td> </td><td>GLubyte  </td><td><var class="pdparam">green</var>, </td></tr><tr><td> </td><td>GLubyte  </td><td><var class="pdparam">blue</var>, </td></tr><tr><td> </td><td>GLubyte  </td><td><var class="pdparam">alpha</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor4us</b>(</code></td><td>GLushort  </td><td><var class="pdparam">red</var>, </td></tr><tr><td> </td><td>GLushort  </td><td><var class="pdparam">green</var>, </td></tr><tr><td> </td><td>GLushort  </td><td><var class="pdparam">blue</var>, </td></tr><tr><td> </td><td>GLushort  </td><td><var class="pdparam">alpha</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor4ui</b>(</code></td><td>GLuint  </td><td><var class="pdparam">red</var>, </td></tr><tr><td> </td><td>GLuint  </td><td><var class="pdparam">green</var>, </td></tr><tr><td> </td><td>GLuint  </td><td><var class="pdparam">blue</var>, </td></tr><tr><td> </td><td>GLuint  </td><td><var class="pdparam">alpha</var><code>)</code>;</td></tr></table></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="parameters"></a><h2>Parameters</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>red</code></em>, </span><span class="term"><em class="parameter"><code>green</code></em>, </span><span class="term"><em class="parameter"><code>blue</code></em></span></dt><dd><p>

Specify new red, green, and blue values for the current color.

</p></dd><dt><span class="term"><em class="parameter"><code>alpha</code></em></span></dt><dd><p>

Specifies a new alpha value for the current color.

Included only in the four-argument <code class="function">glColor4</code> commands.

</p></dd></dl></div></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor3bv</b>(</code></td><td>const GLbyte *  </td><td><var class="pdparam">v</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor3sv</b>(</code></td><td>const GLshort *  </td><td><var class="pdparam">v</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor3iv</b>(</code></td><td>const GLint *  </td><td><var class="pdparam">v</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor3fv</b>(</code></td><td>const GLfloat *  </td><td><var class="pdparam">v</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor3dv</b>(</code></td><td>const GLdouble *  </td><td><var class="pdparam">v</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor3ubv</b>(</code></td><td>const GLubyte *  </td><td><var class="pdparam">v</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor3usv</b>(</code></td><td>const GLushort *  </td><td><var class="pdparam">v</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor3uiv</b>(</code></td><td>const GLuint *  </td><td><var class="pdparam">v</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor4bv</b>(</code></td><td>const GLbyte *  </td><td><var class="pdparam">v</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor4sv</b>(</code></td><td>const GLshort *  </td><td><var class="pdparam">v</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor4iv</b>(</code></td><td>const GLint *  </td><td><var class="pdparam">v</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor4fv</b>(</code></td><td>const GLfloat *  </td><td><var class="pdparam">v</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor4dv</b>(</code></td><td>const GLdouble *  </td><td><var class="pdparam">v</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor4ubv</b>(</code></td><td>const GLubyte *  </td><td><var class="pdparam">v</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor4usv</b>(</code></td><td>const GLushort *  </td><td><var class="pdparam">v</var><code>)</code>;</td></tr></table></div><div class="funcsynopsis"><table><tr><td><code class="funcdef">void <b class="fsfunc">glColor4uiv</b>(</code></td><td>const GLuint *  </td><td><var class="pdparam">v</var><code>)</code>;</td></tr></table></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="parameters2"></a><h2>Parameters</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>v</code></em></span></dt><dd><p>

Specifies a pointer to an array that contains red, green, blue,

and (sometimes) alpha values.

</p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p>

The GL stores both a current single-valued color index

and a current four-valued RGBA color.

<code class="function">glColor</code> sets a new four-valued RGBA color.

<code class="function">glColor</code> has two major variants:

<code class="function">glColor3</code> and <code class="function">glColor4</code>.

<code class="function">glColor3</code> variants specify new red,

green,

and blue values explicitly

and set the current alpha value to 1.0 (full intensity) implicitly.

<code class="function">glColor4</code> variants specify all four color components explicitly.

</p><p>

<code class="function">glColor3b</code>, <code class="function">glColor4b</code>,

<code class="function">glColor3s</code>, <code class="function">glColor4s</code>, <code class="function">glColor3i</code>, and <code class="function">glColor4i</code> take

three or four signed byte, short, or long integers as arguments.

When <span class="bold"><strong>v</strong></span> is appended to the name,

the color commands can take a pointer to an array of such values.

</p><p>

Current color values are stored in floating-point format,

with unspecified mantissa and exponent sizes.

Unsigned integer color components,

when specified,

are linearly mapped to floating-point values such that the largest

representable value maps to 1.0 (full intensity),

and 0 maps to 0.0 (zero intensity).

Signed integer color components,

when specified,

are linearly mapped to floating-point values such that the most positive

representable value maps to 1.0,

and the most negative representable value maps to

<math overflow="scroll">

<mn>-1.0</mn>

</math>.

(Note that

this mapping does not convert 0 precisely to 0.0.)

Floating-point values are mapped directly.

</p><p>

Neither floating-point nor signed integer values are clamped

to the range

<math overflow="scroll">

<mfenced open="[" close="]">

<mn>0</mn>

<mn>1</mn>

</mfenced>

</math>

before the current color is updated.

However,

color components are clamped to this range before they are interpolated

or written into a color buffer.

</p></div><div class="refsect1" lang="en" xml:lang="en"><a id="notes"></a><h2>Notes</h2><p>

The initial value for the current color is (1, 1, 1, 1).

</p><p>

The current color can be updated at any time.

In particular,

<code class="function">glColor</code> can be called between a call to <a class="citerefentry" href="glBegin"><span class="citerefentry"><span class="refentrytitle">glBegin</span></span></a> and the corresponding

call to <a class="citerefentry" href="glEnd"><span class="citerefentry"><span class="refentrytitle">glEnd</span></span></a>.

</p></div><div class="refsect1" lang="en" xml:lang="en"><a id="associatedgets"></a><h2>Associated Gets</h2><p>

<a class="citerefentry" href="glGet"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a> with argument <code class="constant">GL_CURRENT_COLOR</code>

</p><p>

<a class="citerefentry" href="glGet"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a> with argument <code class="constant">GL_RGBA_MODE</code>

</p></div>

{$pipelinestall}{$examples}

<div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p>

<code class="function">glColorPointer</code>,

<a class="citerefentry" href="glIndex"><span class="citerefentry"><span class="refentrytitle">glIndex</span></span></a>,

<a class="citerefentry" href="glSecondaryColor"><span class="citerefentry"><span class="refentrytitle">glSecondaryColor</span></span></a>

</p></div><div class="refsect1" lang="en" xml:lang="en"><div id="Copyright"><h2>Copyright</h2><p>

Copyright © 1991-2006

Silicon Graphics, Inc. This document is licensed under the SGI

Free Software B License. For details, see

<a class="ulink" href="http://oss.sgi.com/projects/FreeB/" target="_top">http://oss.sgi.com/projects/FreeB/</a>.

</p></div></div></div>