SoTextureCoordinatePlane - Online Linux Manual PageSection : 3
Updated : Mon Jan 25 2021
Source : Version 2.5.0
Note : Coin
NAMESoTextureCoordinatePlane − The SoTextureCoordinatePlane class generates texture coordinates by projecting onto a plane.
SYNOPSIS
#include <Inventor/nodes/SoTextureCoordinatePlane.h> Inherits SoTextureCoordinateFunction.
Public Member Functionsvirtual SoType getTypeId (void) const
SoTextureCoordinatePlane (void)
virtual void doAction (SoAction *action)
virtual void GLRender (SoGLRenderAction *action)
virtual void pick (SoPickAction *action)
virtual void callback (SoCallbackAction *action)
Static Public Member Functionsstatic SoType getClassTypeId (void)
static void initClass (void)
Public AttributesSoSFVec3f directionS
SoSFVec3f directionT
Protected Member Functionsvirtual const SoFieldData * getFieldData (void) const
virtual ~SoTextureCoordinatePlane ()
Static Protected Member Functionsstatic const SoFieldData ** getFieldDataPtr (void)
Additional Inherited Members
Detailed DescriptionThe SoTextureCoordinatePlane class generates texture coordinates by projecting onto a plane. SoTextureCoordinatePlane is used for generating texture coordinates by projecting the object onto a texture plane. The s and t texture coordinates are computed as the distance from the origin to the projected point, in the respective directions. The texture plane is specified using two direction vectors, given as SoTextureCoordinatePlane::directionS and SoTextureCoordinatePlane::directionT in object space coordinates. The length of the vector determines the repeat interval of the texture per unit length. A simple usage example: SoSeparator *root = new SoSeparator;
root->ref();
// the texture image
SoTexture2 *tex = new SoTexture2;
tex->filename.setValue("foo.png");
root->addChild(tex);
// the texture plane
SoTextureCoordinatePlane *texPlane = new SoTextureCoordinatePlane;
texPlane->directionS.setValue(SbVec3f(1,0,0));
texPlane->directionT.setValue(SbVec3f(0,1,0));
root->addChild(texPlane);
// add a simple cube
SoCube * c = new SoCube;
c->width.setValue(1.0);
c->height.setValue(1.0)
c->depth.setValue(1.0);
root->addChild(new SoCube);Here, we are projecting a texture onto a cube. The texture coordinate plane is specified by directionS = (1,0,0) and directionT = (0,1,0), meaning that it is parallel to the front face of the cube. Setting e.g. directionS = (0,1,0) and directionT = (-1,0,0) would rotate the texture counterclockwise by 90 degrees. Setting them to ((2,0,0), (0,2,0)) results to the texture being repeated twice per unit, so the texture appears four times on the 1x1 face. Note that when you transform the cube, the transformation will also affect the texture - it will be transformed vs. the rest of the world, but appear 'fixed' on the object. If you want to change the placement of the texture on the object, you have to insert a SoTexture2Transform node before the texture coordinate plane. For instance in the example above, since the cube is centered in its coordinate system, the lower left corner of the texture appears to be in the middle of the face. To move the texture's origin to coincide with the lower left corner of the face, insert SoTexture2Transform * tf = new SoTexture2Transform;
tf->translation.setValue(-0.5,-0.5);
root->addChild(tf);before adding the texture coordinate plane. FILE FORMAT/DEFAULTS: TextureCoordinatePlane {
directionS 1 0 0
directionT 0 1 0
}
Constructor & Destructor Documentation
SoTextureCoordinatePlane::SoTextureCoordinatePlane (void)Constructor. References directionS, and directionT.
SoTextureCoordinatePlane::~SoTextureCoordinatePlane () [protected], [virtual]Destructor.
Member Function Documentation
SoType SoTextureCoordinatePlane::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. Reimplemented from SoTextureCoordinateFunction.
const SoFieldData * SoTextureCoordinatePlane::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 SoTextureCoordinateFunction.
void SoTextureCoordinatePlane::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 SoTextureCoordinatePlane::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(), and SoAction::getState().
void SoTextureCoordinatePlane::pick (SoPickAction * action) [virtual]Action method for SoPickAction. Does common processing for SoPickAction action instances. Reimplemented from SoNode. References doAction().
void SoTextureCoordinatePlane::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().
Member Data Documentation
SoSFVec3f SoTextureCoordinatePlane::directionSThe S texture coordinate plane direction. The length of the vector determines the repeat interval of the texture per unit length. Referenced by SoTextureCoordinatePlane().
SoSFVec3f SoTextureCoordinatePlane::directionTThe T texture coordinate plane direction. The length of the vector determines the repeat interval of the texture per unit length. Referenced by SoTextureCoordinatePlane().
AuthorGenerated automatically by Doxygen for Coin from the source code. 0
Johanes Gumabo
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