.TH "SoVRMLNormalInterpolator" 3 "Thu May 29 2014" "Version 4.0.0a" "Coin" \" -*- nroff -*-
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.SH NAME
SoVRMLNormalInterpolator \- 
.PP
The \fBSoVRMLNormalInterpolator\fP class is used to interpolate normals\&.
.PP
\fBThe detailed class documentation is taken verbatim from the VRML97 standard (ISO/IEC 14772-1:1997)\&. It is copyright The Web3D Consortium, and is used by permission of the Consortium:\fP  

.SH SYNOPSIS
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.PP
.PP
\fC#include <Inventor/VRMLnodes/SoVRMLNormalInterpolator\&.h>\fP
.PP
Inherits \fBSoVRMLInterpolator\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 "virtual const \fBSoEngineOutputData\fP * \fBgetOutputData\fP (void) const "
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.RI "\fBSoVRMLNormalInterpolator\fP (void)"
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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 * \fBcreateInstance\fP (void)"
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.RI "static void \fBinitClass\fP (void)"
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.SS "Public Attributes"

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.RI "\fBSoMFVec3f\fP \fBkeyValue\fP"
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.RI "\fBSoEngineOutput\fP \fBvalue_changed\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~SoVRMLNormalInterpolator\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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.RI "static const \fBSoEngineOutputData\fP ** \fBgetOutputDataPtr\fP (void)"
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.SS "Additional Inherited Members"
.SH "Detailed Description"
.PP 
The \fBSoVRMLNormalInterpolator\fP class is used to interpolate normals\&.
.PP
\fBThe detailed class documentation is taken verbatim from the VRML97 standard (ISO/IEC 14772-1:1997)\&. It is copyright The Web3D Consortium, and is used by permission of the Consortium:\fP 


.PP
.nf
NormalInterpolator {
  eventIn      SFFloat set_fraction       # (-inf, inf)
  exposedField MFFloat key           []   # (-inf, inf)
  exposedField MFVec3f keyValue      []   # (-inf, inf)
  eventOut     MFVec3f value_changed
}

.fi
.PP
.PP
The NormalInterpolator node interpolates among a list of normal vector sets specified by the keyValue field\&. The output vector, value_changed, shall be a set of normalized vectors\&. Values in the keyValue field shall be of unit length\&. The number of normals in the keyValue field shall be an integer multiple of the number of keyframes in the key field\&. That integer multiple defines how many normals will be contained in the value_changed events\&. Normal interpolation shall be performed on the surface of the unit sphere\&. That is, the output values for a linear interpolation from a point P on the unit sphere to a point Q also on the unit sphere shall lie along the shortest arc (on the unit sphere) connecting points P and Q\&. Also, equally spaced input fractions shall result in arcs of equal length\&. The results are undefined if P and Q are diagonally opposite\&. A more detailed discussion of interpolators is provided in 4\&.6\&.8, Interpolator nodes (http://www.web3d.org/x3d/specifications/vrml/ISO-IEC-14772-VRML97/part1/concepts.html#4.6.8)\&. 
.SH "Constructor & Destructor Documentation"
.PP 
.SS "SoVRMLNormalInterpolator::SoVRMLNormalInterpolator (void)"
Constructor\&. 
.SS "SoVRMLNormalInterpolator::~SoVRMLNormalInterpolator ()\fC [protected]\fP, \fC [virtual]\fP"
Destructor\&. 
.SH "Member Function Documentation"
.PP 
.SS "\fBSoType\fP SoVRMLNormalInterpolator::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
Reimplemented from \fBSoVRMLInterpolator\fP\&.
.SS "const \fBSoFieldData\fP * SoVRMLNormalInterpolator::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 \fBSoVRMLInterpolator\fP\&.
.SS "const \fBSoEngineOutputData\fP * SoVRMLNormalInterpolator::getOutputData (void) const\fC [virtual]\fP"
\fIThis API member is considered internal to the library, as it is not likely to be of interest to the application programmer\&.\fP 
.PP
Reimplemented from \fBSoVRMLInterpolator\fP\&.
.SH "Member Data Documentation"
.PP 
.SS "\fBSoMFVec3f\fP SoVRMLNormalInterpolator::keyValue"
The keyValue vector\&. 
.SS "\fBSoEngineOutput\fP SoVRMLNormalInterpolator::value_changed"
The eventOut which is sent every time the interpolator has calculated a new value\&. 

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