SoVRMLTextureTransform - Online Linux Manual PageSection : 3
Updated : Mon Jan 25 2021
Source : Version 2.5.0
Note : Coin
NAMESoVRMLTextureTransform − The SoVRMLTextureTransform class defines a transformation applied to texture coordinates​.
SYNOPSIS
#include <Inventor/VRMLnodes/SoVRMLTextureTransform​.h> Inherits SoNode​.
Public Member Functionsvirtual SoType getTypeId (void) const
SoVRMLTextureTransform (void)
virtual void doAction (SoAction *action)
virtual void callback (SoCallbackAction *action)
virtual void GLRender (SoGLRenderAction *action)
virtual void getMatrix (SoGetMatrixAction *action)
virtual void pick (SoPickAction *action)
Static Public Member Functionsstatic SoType getClassTypeId (void)
static void initClass (void)
Public AttributesSoSFVec2f translation
SoSFFloat rotation
SoSFVec2f scale
SoSFVec2f center
Protected Member Functionsvirtual const SoFieldData * getFieldData (void) const
virtual ~SoVRMLTextureTransform ()
Static Protected Member Functionsstatic const SoFieldData ** getFieldDataPtr (void)
Additional Inherited Members
Detailed DescriptionThe SoVRMLTextureTransform class defines a transformation applied to texture coordinates​. The 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:

TextureTransform { exposedField SFVec2f center 0 0 # (-inf, inf) exposedField SFFloat rotation 0 # (-inf, inf) exposedField SFVec2f scale 1 1 # (-inf, inf) exposedField SFVec2f translation 0 0 # (-inf, inf) } The TextureTransform node defines a 2D transformation that is applied to texture coordinates (see SoVRMLTextureCoordinate)​. This node affects the way textures coordinates are applied to the geometric surface​. The transformation consists of (in order): • a translation; • a rotation about the centre point; • a non-uniform scale about the centre point​. These parameters support changes to the size, orientation, and position of textures on shapes​. Note that these operations appear reversed when viewed on the surface of geometry​. For example, a scale value of (2 2) will scale the texture coordinates and have the net effect of shrinking the texture size by a factor of 2 (texture coordinates are twice as large and thus cause the texture to repeat)​. A translation of (0​.5 0​.0) translates the texture coordinates +​.5 units along the S-axis and has the net effect of translating the texture -0​.5 along the S-axis on the geometry's surface​. A rotation of pi/2 of the texture coordinates results in a -pi/2 rotation of the texture on the geometry​. The center field specifies a translation offset in texture coordinate space about which the rotation and scale fields are applied​. The scale field specifies a scaling factor in S and T of the texture coordinates about the center point​. scale values shall be in the range (-pi, pi)​. The rotation field specifies a rotation in radians of the texture coordinates about the center point after the scale has been applied​. A positive rotation value makes the texture coordinates rotate counterclockwise about the centre, thereby rotating the appearance of the texture itself clockwise​. The translation field specifies a translation of the texture coordinates​.
In matrix transformation notation, where Tc is the untransformed texture coordinate, Tc' is the transformed texture coordinate, C (center), T (translation), R (rotation), and S (scale) are the intermediate transformation matrices, Tc' = -C × S × R × C × T × TcNote that this transformation order is the reverse of the Transform node transformation order since the texture coordinates, not the texture, are being transformed (i​.e​., the texture coordinate system)​.
Constructor & Destructor Documentation
SoVRMLTextureTransform::SoVRMLTextureTransform (void)Constructor​. References center, rotation, scale, and translation​.
SoVRMLTextureTransform::~SoVRMLTextureTransform () [protected], [virtual]Destructor​.
Member Function Documentation
SoType SoVRMLTextureTransform::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 } else if (node->getTypeId()​.isOfType(SoGroup::getClassTypeId())) { SoGroup * group = (SoGroup *)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​.
const SoFieldData * SoVRMLTextureTransform::getFieldData (void) const [protected], [virtual]Returns a pointer to the class-wide field data storage object for this instance​. If no fields are present, returns NULL​. Reimplemented from SoFieldContainer​.
void SoVRMLTextureTransform::doAction (SoAction * action) [virtual]This function performs the typical operation of a node for any action​. Reimplemented from SoNode​. References SoAction::getState()​. Referenced by callback(), GLRender(), and pick()​.
void SoVRMLTextureTransform::callback (SoCallbackAction * action) [virtual]Action method for SoCallbackAction​. Simply updates the state according to how the node behaves for the render action, so the application programmer can use the SoCallbackAction for extracting information about the scene graph​. Reimplemented from SoNode​. References doAction()​.
void SoVRMLTextureTransform::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​. References doAction()​.
void SoVRMLTextureTransform::getMatrix (SoGetMatrixAction * action) [virtual]Action method for SoGetMatrixAction​. Updates action by accumulating with the transformation matrix of this node (if any)​. Reimplemented from SoNode​. References SoGetMatrixAction::getTextureInverse(), SoGetMatrixAction::getTextureMatrix(), SbMatrix::inverse(), SbMatrix::multLeft(), and SbMatrix::multRight()​.
void SoVRMLTextureTransform::pick (SoPickAction * action) [virtual]Action method for SoPickAction​. Does common processing for SoPickAction action instances​. Reimplemented from SoNode​. References doAction()​.
Member Data Documentation
SoSFVec2f SoVRMLTextureTransform::translationTranslation value​. Default values is (0, 0, 0)​. Referenced by SoVRMLTextureTransform()​.
SoSFFloat SoVRMLTextureTransform::rotationRotation, in radians, around the centre points​. Default value is 0​. Referenced by SoVRMLTextureTransform()​.
SoSFVec2f SoVRMLTextureTransform::scaleScale vector about the centre point​. Default value is (1, 1)​. Referenced by SoVRMLTextureTransform()​.
SoSFVec2f SoVRMLTextureTransform::centerTexture centre​. Default value is (0​.0, 0​.0)​. Referenced by SoVRMLTextureTransform()​.
AuthorGenerated automatically by Doxygen for Coin from the source code​. 0
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