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       SoText3 -

       The SoText3 class renders extruded 3D text.

       Render text as 3D geometry.


       #include <Inventor/nodes/SoText3.h>

       Inherits SoShape.

   Public Types
       enum Part { FRONT =  1, SIDES =  2, BACK =  4, ALL =  FRONT|BACK|SIDES }
       enum Justification { LEFT =  1, RIGHT, CENTER }

   Public Member Functions
       SbBox3f getCharacterBounds (SoState *state, int stringindex, int charindex)
       virtual void GLRender (SoGLRenderAction *action)
       virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)

   Static Public Member Functions
       static void initClass (void)

   Public Attributes
       SoMFString string
       SoSFFloat spacing
       SoSFEnum justification
       SoSFBitMask parts

   Protected Member Functions
       virtual void generatePrimitives (SoAction *)
       virtual void computeBBox (SoAction *action, SbBox3f &box, SbVec3f &center)
       virtual SoDetail * createTriangleDetail (SoRayPickAction *action, const SoPrimitiveVertex
           *v1, const SoPrimitiveVertex *v2, const SoPrimitiveVertex *v3, SoPickedPoint *pp)
       virtual void notify (SoNotList *list)

Detailed Description

       The SoText3 class renders extruded 3D text.

       Render text as 3D geometry.

       The size of the textual geometry representation is decided from the SoFont::size field of
       a preceding SoFont-node in the scene graph, which specifies the size in unit coordinates.
       This value sets the approximate vertical size of the letters. The default value if no
       SoFont-nodes are used, is 10.

       This node will create 3D geometry from a specified font defined by a preceding SoFont
       node. The complexity of the glyphs is controlled by a preceding SoComplexity node with
       Type set to OBJECT_SPACE. Please note that the default builtin 3D font will not be
       affected by the SoComplexity node.

       This is a simple example of an extruded SoText3 string:

          #Inventor V2.1 ascii

          Separator {
            renderCaching ON
            Font {
               name "Arial"
               size 2
            ProfileCoordinate2 {
              point [ 0 0,
                      0.05 0.05,
                      0.25 0.05,
                      0.3 0 ]
            LinearProfile {
              index [ 0, 1, 2, 3 ]
            Complexity {
              type OBJECT_SPACE
              value 1
            ShapeHints {
              creaseAngle 1.5
              shapeType SOLID
              vertexOrdering COUNTERCLOCKWISE
            Material {
              diffuseColor 0.6 0.6 0.8
              specularColor 1 1 1
            Text3 {
              string ["Coin3D"]
              parts ALL

       if SoText3::Part is set to SIDES or ALL and no profile is provided, a flat, one unit long profile will be created.

       Separate colors can be assigned to the front, sides and back of the glyphs by adding a preceding SoMaterialBinding node. Set the value field to PER_PART (default is OVERALL). The front, side and back of the glyphs will then be colored according to diffuse color 0, 1 and 2 found on the stack.

       Beware that using a lot of SoText3 text characters in a scene will usually have severe impact on the rendering performance, as each and every character of the text increases the polygon-count a lot. This makes SoText3 nodes most suitable in situations where you just need a few characters to be placed in your scene, rather than to visualize complete sentences.


           Text3 {
               string ''
               spacing 1
               justification LEFT
               parts FRONT

       See also:
           SoText2, SoAsciiText, SoProfile

Member Enumeration Documentation

   enum SoText3::Part Used to specify which parts should be rendered/generated.

       FRONT  Front of characters.

       SIDES  Sides of characters.

       BACK   Back of characters.

       ALL    All parts.

   enum SoText3::Justification Used to specify horizontal string alignment.

       LEFT   Left edges of strings are aligned.

       RIGHT  Right edges of strings are aligned.

       CENTER Strings are centered.

Member Function Documentation

   void SoText3::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 SoShape.

   SbBox3f SoText3::getCharacterBounds (SoState *state, intstringindex, intcharindex) Not
       implemented. Should probably have been private in OIV. Let us know if you need this method
       for anything, and we'll implement it.
   void SoText3::GLRender (SoGLRenderAction *action) [virtual] Action method for the
       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 SoShape.

   void SoText3::getPrimitiveCount (SoGetPrimitiveCountAction *action) [virtual] Action method
       for the SoGetPrimitiveCountAction.
       Calculates the number of triangle, line segment and point primitives for the node and adds
       these to the counters of the action.

       Nodes influencing how geometry nodes calculates their primitive count also overrides this
       method to change the relevant state variables.

       Reimplemented from SoShape.

   void SoText3::generatePrimitives (SoAction *action) [protected, virtual] The method implements
       action behavior for shape nodes for SoCallbackAction. It is invoked from
       SoShape::callback(). (Subclasses should not override SoNode::callback().)
       The subclass implementations uses the convenience methods SoShape::beginShape(),
       SoShape::shapeVertex(), and SoShape::endShape(), with SoDetail instances, to pass the
       primitives making up the shape back to the caller.

       Implements SoShape.

   void SoText3::computeBBox (SoAction *action, SbBox3f &box, SbVec3f &center) [protected,
       virtual] Implemented by SoShape subclasses to let the SoShape superclass know the exact
       size and weighted center point of the shape's bounding box.
       The bounding box and center point should be calculated and returned in the local
       coordinate system.

       The method implements action behavior for shape nodes for SoGetBoundingBoxAction. It is
       invoked from SoShape::getBoundingBox(). (Subclasses should not override

       The box parameter sent in is guaranteed to be an empty box, while center is undefined upon
       function entry.

       Implements SoShape.

   SoDetail * SoText3::createTriangleDetail (SoRayPickAction *action, const SoPrimitiveVertex
       *v1, const SoPrimitiveVertex *v2, const SoPrimitiveVertex *v3, SoPickedPoint *pp)
       [protected, virtual] Will create triangle detail for a SoPickedPoint. This method will
       only be called internally, when generatePrimitives() is used for picking
       (SoShape::rayPick() is not overridden).
       This method returns NULL in Open Inventor, and subclasses will need to override this
       method to create details for a SoPickedPoint.

       This is not necessary with Coin. Of course, if you choose to override it, it will work in
       the same way as Open Inventor.

       For this to work, you must supply a face or line detail when generating primitives. If you
       supply NULL for the detail argument in SoShape::beginShape(), you'll have to override this

       Reimplemented from SoShape.

   void SoText3::notify (SoNotList *l) [protected, virtual] Notifies all auditors for this
       instance when changes are made.
       Reimplemented from SoShape.

Member Data Documentation

   SoMFString SoText3::string The strings to render.
       Array defaults to contain a single empty string.

   SoSFFloat SoText3::spacing Vertical spacing. 1.0 is the default spacing.
   SoSFEnum SoText3::justification Horizontal justification. Default is alignment at the left
   SoSFBitMask SoText3::parts Character parts. Default is to show only the front-facing part.


       Generated automatically by Doxygen for Coin from the source code.