sovertexattribute(3)
NAME
SoVertexAttribute - A generic node for providing GL vertex attributes
of various types.
SYNOPSIS
#include <Inventor/nodes/SoVertexAttribute.h> Inherits SoNode. Inherited by SoAnyVertexAttribute< Type >. Public Member Functions virtual SoType getTypeId (void) const SoMField * getValuesField (void) const virtual void doAction (SoAction *action) virtual void GLRender (SoGLRenderAction *action) virtual void write (SoWriteAction *action) virtual void copyContents (const SoFieldContainer *from, SbBool copyconnections) virtual void notify (SoNotList *l) Static Public Member Functions static void initClass (void) static SoType getClassTypeId (void) Public Attributes SoSFName name SoSFName typeName Protected Member Functions virtual SbBool readInstance (SoInput *in, unsigned short flags)
Detailed Description
A generic node for providing GL vertex attributes of various types.
- The SoVertexAttribute nodes is used with the SoShaderProgram node to
send vertex attributes to the vertex shader.
- #Inventor V2.1 ascii
- Separator {
ShaderProgram {shaderObject [VertexShader {sourceProgram "vertex.glsl"}]}Coordinate3 {point [ 0 0 0, 1 0 0, 1 1 0 ]}VertexAttribute {typeName "SoMFVec3f"
name "color"
values [ 1.0 0.0 0.0,0.0 1.0 0.0,
0.0 0.0 1.0 ]}IndexedFaceSet {coordIndex [ 0, 1, 2, -1 ]}}
.fi - The vertex shader (vertex.glsl)
attribute vec3 color;void main(void)
{gl_Position = ftransform();
gl_FrontColor = vec4(color, 1.0);} - See also:
SoVertexAttributeBinding
- Be aware that this class is an extension for Coin, and it is not
available in the original SGI Open Inventor v2.1 API. - Since:
Coin 3.0
Member Function Documentation
- void SoVertexAttribute::initClass (void) [static]
- Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.
- Reimplemented from SoNode.
- SoType SoVertexAttribute::getClassTypeId (void) [static]
- This static method returns the SoType object associated with objects of this class.
- Reimplemented from SoNode.
- SoType SoVertexAttribute::getTypeId (void) const [virtual]
- Returns the type identification of an object derived from a class
inheriting SoBase. This is used for run-time type checking and 'downward' casting. - Usage example:
void foo(SoNode * node)
{if (node->getTypeId() == SoFile::getClassTypeId()) {SoFile * filenode = (SoFile *)node; // safe downward cast, knows the type}} - For application programmers wanting to extend the library with new
nodes, engines, nodekits, draggers or others: this method needs to be
overridden in all 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 Inventor/nodes/SoSubNode.h (SO_NODE_INIT_CLASS and
SO_NODE_CONSTRUCTOR for node classes), Inventor/engines/SoSubEngine.h (for engine classes) and so on. - For more information on writing Coin extensions, see the class
documentation of the toplevel superclasses for the various class
groups. - Implements SoBase.
- void SoVertexAttribute::doAction (SoAction * action) [virtual]
- This function performs the typical operation of a node for any action.
- Reimplemented from SoNode.
- void SoVertexAttribute::GLRender (SoGLRenderAction * action) [virtual]
- Action method for the SoGLRenderAction.
- 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. - Reimplemented from SoNode.
- void SoVertexAttribute::write (SoWriteAction * action) [virtual]
- Action method for SoWriteAction.
- Writes out a node object, and any connected nodes, engines etc, if
necessary. - Reimplemented from SoNode.
- void SoVertexAttribute::copyContents (const SoFieldContainer * from, SbBool
- copyconnections) [virtual] Makes a deep copy of all data of from into this instance, except external scenegraph references if copyconnections is FALSE.
- This is the protected method that should be overridden by extension
node / engine / dragger / whatever subclasses which needs to account
for internal data that are not handled automatically. - For copying nodes from application code, you should not invoke this
function directly, but rather call the SoNode::copy() function:
SoNode * mynewnode = templatenode->copy(); - The same also goes for engines.
- Make sure that when you override the copyContents() method in your
extension class that you also make it call upwards to it's parent
superclass in the inheritance hierarchy, as copyContents() in for instance SoNode and SoFieldContainer does important work. It should go something like this:
void
MyCoinExtensionNode::copyContents(const SoFieldContainer * from,SbBool copyconnections){// let parent superclasses do their thing (copy fields, copy
// instance name, etc etc)
SoNode::copyContents(from, copyconnections);// [..then copy internal data..]} - Reimplemented from SoNode.
- void SoVertexAttribute::notify (SoNotList * l) [virtual]
- Notifies all auditors for this instance when changes are made.
- Reimplemented from SoNode.
- SbBool SoVertexAttribute::readInstance (SoInput * in, unsigned short flags)
- [protected, virtual]
This method is mainly intended for internal use during file import
operations. - It reads a definition of an instance from the input stream in. The
input stream state points to the start of a serialized / persistant
representation of an instance of this class type. - TRUE or FALSE is returned, depending on if the instantiation and
configuration of the new object of this class type went ok or not. The import process should be robust and handle corrupted input streams by
returning FALSE. - flags is used internally during binary import when reading user extension nodes, group nodes or engines.
- Reimplemented from SoNode.
Author
- Generated automatically by Doxygen for Coin from the source code.