.TH "SoColorIndex" 3 "Thu May 29 2014" "Version 4.0.0a" "Coin" \" -*- nroff -*-
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.SH NAME
SoColorIndex \- 
.PP
The \fBSoColorIndex\fP class is used to specify color indices for subsequent shapes\&.
.PP
This node should only be used in OpenGL color-index mode, and only when the current light model is set to \fBSoLightModel::BASE_COLOR\fP\&.  

.SH SYNOPSIS
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.PP
.PP
\fC#include <Inventor/nodes/SoColorIndex\&.h>\fP
.PP
Inherits \fBSoNode\fP\&.
.SS "Public Member Functions"

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.RI "virtual \fBSoType\fP \fBgetTypeId\fP (void) const "
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.RI "\fIReturns the type identification of an object derived from a class inheriting \fBSoBase\fP\&. This is used for run-time type checking and 'downward' casting\&. \fP"
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.RI "\fBSoColorIndex\fP (void)"
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.RI "virtual void \fBGLRender\fP (\fBSoGLRenderAction\fP *action)"
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.SS "Static Public Member Functions"

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.RI "static \fBSoType\fP \fBgetClassTypeId\fP (void)"
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.RI "static void \fBinitClass\fP (void)"
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.SS "Public Attributes"

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.RI "\fBSoMFInt32\fP \fBindex\fP"
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.SS "Protected Member Functions"

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.RI "virtual const \fBSoFieldData\fP * \fBgetFieldData\fP (void) const "
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.RI "virtual \fB~SoColorIndex\fP ()"
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.SS "Static Protected Member Functions"

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.RI "static const \fBSoFieldData\fP ** \fBgetFieldDataPtr\fP (void)"
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.SS "Additional Inherited Members"
.SH "Detailed Description"
.PP 
The \fBSoColorIndex\fP class is used to specify color indices for subsequent shapes\&.
.PP
This node should only be used in OpenGL color-index mode, and only when the current light model is set to \fBSoLightModel::BASE_COLOR\fP\&. 

OpenGL colorindex mode is where the colors for individual pixels are fetched from a color lookup table ('CLUT')\&. The usual thing to do is to set up a canvas in RGBA truecolor mode\&.
.PP
One common use for colorindex mode OpenGL canvases is to use one in the overlay planes (which are usually limited to only 2 or 4 available colors), if supported by the OpenGL hardware and / or driver\&.
.PP
\fBFILE FORMAT/DEFAULTS:\fP 
.PP
.nf
ColorIndex {
    index 1
}

.fi
.PP
 
.SH "Constructor & Destructor Documentation"
.PP 
.SS "SoColorIndex::SoColorIndex (void)"
Constructor\&. 
.SS "SoColorIndex::~SoColorIndex ()\fC [protected]\fP, \fC [virtual]\fP"
Destructor\&. 
.SH "Member Function Documentation"
.PP 
.SS "\fBSoType\fP SoColorIndex::getTypeId (void) const\fC [virtual]\fP"

.PP
Returns the type identification of an object derived from a class inheriting \fBSoBase\fP\&. This is used for run-time type checking and 'downward' casting\&. Usage example:
.PP
.PP
.nf
void foo(SoNode * node)
{
  if (node->getTypeId() == SoFile::getClassTypeId()) {
    SoFile * filenode = (SoFile *)node;  // safe downward cast, knows the type
  }
}
.fi
.PP
.PP
For application programmers wanting to extend the library with new nodes, engines, nodekits, draggers or others: this method needs to be overridden in \fIall\fP subclasses\&. This is typically done as part of setting up the full type system for extension classes, which is usually accomplished by using the pre-defined macros available through for instance \fBInventor/nodes/SoSubNode\&.h\fP (SO_NODE_INIT_CLASS and SO_NODE_CONSTRUCTOR for node classes), Inventor/engines/SoSubEngine\&.h (for engine classes) and so on\&.
.PP
For more information on writing Coin extensions, see the class documentation of the toplevel superclasses for the various class groups\&. 
.PP
Implements \fBSoBase\fP\&.
.SS "const \fBSoFieldData\fP * SoColorIndex::getFieldData (void) const\fC [protected]\fP, \fC [virtual]\fP"
Returns a pointer to the class-wide field data storage object for this instance\&. If no fields are present, returns \fCNULL\fP\&. 
.PP
Reimplemented from \fBSoFieldContainer\fP\&.
.SS "void SoColorIndex::GLRender (\fBSoGLRenderAction\fP *action)\fC [virtual]\fP"
Action method for the \fBSoGLRenderAction\fP\&.
.PP
This is called during rendering traversals\&. Nodes influencing the rendering state in any way or who wants to throw geometry primitives at OpenGL overrides this method\&. 
.PP
Reimplemented from \fBSoNode\fP\&.
.SH "Member Data Documentation"
.PP 
.SS "\fBSoMFInt32\fP SoColorIndex::index"
Color indices which can be used by shapes\&. 

.SH "Author"
.PP 
Generated automatically by Doxygen for Coin from the source code\&.