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SoVRMLSphere Class Reference
[VRML97 classes]

#include <Inventor/VRMLnodes/SoVRMLSphere.h>

Inheritance diagram for SoVRMLSphere:

SoVRMLGeometry SoShape SoNode SoFieldContainer SoBase List of all members.

Detailed Description

The SoVRMLSphere class is used to represent a spherical 3D object.

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:

  Sphere {
    field SFFloat radius  1    # (0, inf)
  }
  

The Sphere node specifies a sphere centred at (0, 0, 0) in the local coordinate system. The radius field specifies the radius of the sphere and shall be greater than zero. Figure 6.15 depicts the fields of the Sphere node.

sphere.gif
Figure 6.15 -- Sphere node

When a texture is applied to a sphere, the texture covers the entire surface, wrapping counterclockwise from the back of the sphere (i.e., longitudinal arc intersecting the -Z-axis) when viewed from the top of the sphere. The texture has a seam at the back where the X=0 plane intersects the sphere and Z values are negative. TextureTransform affects the texture coordinates of the Sphere. The Sphere node's geometry requires outside faces only. When viewed from the inside the results are undefined.


Public Member Functions

 SoVRMLSphere (void)
virtual void GLRender (SoGLRenderAction *action)
virtual void rayPick (SoRayPickAction *action)
virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)

Static Public Member Functions

void initClass (void)

Public Attributes

SoSFFloat radius

Protected Member Functions

virtual ~SoVRMLSphere ()
virtual void generatePrimitives (SoAction *action)
virtual void computeBBox (SoAction *action, SbBox3f &box, SbVec3f &center)


Constructor & Destructor Documentation

SoVRMLSphere::SoVRMLSphere void   ) 
 

Constructor.

SoVRMLSphere::~SoVRMLSphere  )  [protected, virtual]
 

Destructor.


Member Function Documentation

void SoVRMLSphere::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 SoVRMLGeometry.

void SoVRMLSphere::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 SoShape.

void SoVRMLSphere::rayPick SoRayPickAction action  )  [virtual]
 

Calculates picked point based on primitives generated by subclasses.

Reimplemented from SoShape.

void SoVRMLSphere::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 SoVRMLSphere::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 SoVRMLSphere::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 SoNode::getBoundingBox().)

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

Implements SoShape.


Member Data Documentation

SoSFFloat SoVRMLSphere::radius
 

Sphere radius. Default value is 1.0.


The documentation for this class was generated from the following files:
Generated on Tue Dec 9 14:05:27 2003 for Coin by doxygen 1.3.3