Library Functions Manual

NAME¶

SoVRMLElevationGrid - The SoVRMLElevationGrid class is used to represent elevation grids.

SYNOPSIS¶

#include <Inventor/VRMLnodes/SoVRMLElevationGrid.h>

Inherits SoVRMLGeometry.

Public Member Functions¶

virtual SoType getTypeId (void) const
SoVRMLElevationGrid (void)
virtual void GLRender (SoGLRenderAction *action)
virtual void rayPick (SoRayPickAction *action)
virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)

Public Member Functions inherited from SoVRMLGeometry
virtual void search (SoSearchAction *action)
virtual void copyContents (const SoFieldContainer *from, SbBool copyConn)

Public Member Functions inherited from SoShape
virtual SbBool affectsState (void) const
virtual void getBoundingBox (SoGetBoundingBoxAction *action)
virtual void callback (SoCallbackAction *action)
const SoBoundingBoxCache * getBoundingBoxCache (void) const

Public Member Functions inherited from SoNode
void setOverride (const SbBool state)
SbBool isOverride (void) const
void setNodeType (const NodeType type)
NodeType getNodeType (void) const
virtual SoNode * copy (SbBool copyconnections=FALSE) const
virtual void doAction (SoAction *action)
virtual void GLRenderBelowPath (SoGLRenderAction *action)
virtual void GLRenderInPath (SoGLRenderAction *action)
virtual void GLRenderOffPath (SoGLRenderAction *action)
virtual void getMatrix (SoGetMatrixAction *action)
virtual void handleEvent (SoHandleEventAction *action)
virtual void pick (SoPickAction *action)
virtual void write (SoWriteAction *action)
virtual void audioRender (SoAudioRenderAction *action)
virtual void grabEventsSetup (void)
virtual void grabEventsCleanup (void)
virtual void startNotify (void)
uint32_t getNodeId (void) const
virtual void writeInstance (SoOutput *out)
virtual SoNode * addToCopyDict (void) const
virtual SoFieldContainer * copyThroughConnection (void) const

Public Member Functions inherited from SoFieldContainer
void setToDefaults (void)
SbBool hasDefaultValues (void) const
SbBool fieldsAreEqual (const SoFieldContainer *container) const
void copyFieldValues (const SoFieldContainer *container, SbBool copyconnections=FALSE)
SbBool set (const char *const fielddata)
void get (SbString &fielddata)
virtual int getFields (SoFieldList &l) const
virtual int getAllFields (SoFieldList &l) const
virtual SoField * getField (const SbName &name) const
virtual SoField * getEventIn (const SbName &name) const
virtual SoField * getEventOut (const SbName &name) const
SbBool getFieldName (const SoField *const field, SbName &name) const
SbBool enableNotify (const SbBool flag)
SbBool isNotifyEnabled (void) const
SbBool set (const char *fielddata, SoInput *input)
void get (SbString &fielddata, SoOutput *out)
virtual SbBool validateNewFieldValue (SoField *field, void *newval)
virtual void addWriteReference (SoOutput *out, SbBool isfromfield=FALSE)
SbBool getIsBuiltIn (void) const
virtual void getFieldsMemorySize (size_t &managed, size_t &unmanaged) const
void setUserData (void *userdata) const
void * getUserData (void) const

Public Member Functions inherited from SoBase
void ref (void) const
void unref (void) const
void unrefNoDelete (void) const
int32_t getRefCount (void) const
void touch (void)
SbBool isOfType (SoType type) const
virtual SbName getName (void) const
virtual void setName (const SbName &newname)
void addAuditor (void *const auditor, const SoNotRec::Type type)
void removeAuditor (void *const auditor, const SoNotRec::Type type)
const SoAuditorList & getAuditors (void) const
SbBool shouldWrite (void)
void assertAlive (void) const

Static Public Member Functions¶

static SoType getClassTypeId (void)
static void initClass (void)

Static Public Member Functions inherited from SoVRMLGeometry
static SoType getClassTypeId (void)
static void initClass (void)

Static Public Member Functions inherited from SoShape
static SoType getClassTypeId (void)
static void initClass (void)
static void getScreenSize (SoState *const state, const SbBox3f &boundingbox, SbVec2s &rectsize)
static float getDecimatedComplexity (SoState *state, float complexity)

Static Public Member Functions inherited from SoNode
static uint32_t getCompatibilityTypes (const SoType &nodetype)
static SoType getClassTypeId (void)
static SoNode * getByName (const SbName &name)
static int getByName (const SbName &name, SoNodeList &l)
static void initClass (void)
static void initClasses (void)
static uint32_t getNextNodeId (void)
static int getActionMethodIndex (const SoType type)
static void getBoundingBoxS (SoAction *action, SoNode *node)
static void GLRenderS (SoAction *action, SoNode *node)
static void callbackS (SoAction *action, SoNode *node)
static void getMatrixS (SoAction *action, SoNode *node)
static void handleEventS (SoAction *action, SoNode *node)
static void pickS (SoAction *action, SoNode *node)
static void rayPickS (SoAction *action, SoNode *node)
static void searchS (SoAction *action, SoNode *node)
static void writeS (SoAction *action, SoNode *node)
static void audioRenderS (SoAction *action, SoNode *node)
static void getPrimitiveCountS (SoAction *action, SoNode *node)

Static Public Member Functions inherited from SoFieldContainer
static void initClass (void)
static SoType getClassTypeId (void)
static void cleanupClass (void)
static void initCopyDict (void)
static void addCopy (const SoFieldContainer *orig, const SoFieldContainer *copy)
static SoFieldContainer * checkCopy (const SoFieldContainer *orig)
static SoFieldContainer * findCopy (const SoFieldContainer *orig, const SbBool copyconnections)
static void copyDone (void)

Static Public Member Functions inherited from SoBase
static void initClass (void)
static SoType getClassTypeId (void)
static void addName (SoBase *const base, const char *const name)
static void removeName (SoBase *const base, const char *const name)
static void incrementCurrentWriteCounter (void)
static void decrementCurrentWriteCounter (void)
static SoBase * getNamedBase (const SbName &name, SoType type)
static int getNamedBases (const SbName &name, SoBaseList &baselist, SoType type)
static SbBool read (SoInput *input, SoBase *&base, SoType expectedtype)
static void setInstancePrefix (const SbString &c)
static void setTraceRefs (SbBool trace)
static SbBool getTraceRefs (void)
static SbBool connectRoute (SoInput *input, const SbName &fromnodename, const SbName &fromfieldname, const SbName &tonodename, const SbName &tofieldname)
static SbBool readRoute (SoInput *input)

Public Attributes¶

SoSFBool ccw
SoSFBool solid
SoSFFloat creaseAngle
SoSFInt32 zDimension
SoSFInt32 xDimension
SoSFFloat zSpacing
SoSFFloat xSpacing
SoMFFloat height
SoSFNode texCoord
SoSFNode normal
SoSFNode color
SoSFBool colorPerVertex
SoSFBool normalPerVertex

Protected Member Functions¶

virtual const SoFieldData * getFieldData (void) const
virtual ~SoVRMLElevationGrid (void)
virtual void notify (SoNotList *list)
virtual void generatePrimitives (SoAction *action)
virtual void computeBBox (SoAction *action, SbBox3f &bbox, SbVec3f &center)

Protected Member Functions inherited from SoVRMLGeometry
SoVRMLGeometry (void)
virtual ~SoVRMLGeometry ()
void setupShapeHints (SoState *state, const SbBool ccw, const SbBool solid)
virtual SbBool shouldGLRender (SoGLRenderAction *action)
virtual SoChildList * getChildren (void) const

Protected Member Functions inherited from SoShape
SoShape (void)
virtual ~SoShape ()
float getComplexityValue (SoAction *action)
void beginSolidShape (SoGLRenderAction *action)
void endSolidShape (SoGLRenderAction *action)
void GLRenderBoundingBox (SoGLRenderAction *action)
SbBool shouldPrimitiveCount (SoGetPrimitiveCountAction *action)
SbBool shouldRayPick (SoRayPickAction *const action)
void computeObjectSpaceRay (SoRayPickAction *const action)
void computeObjectSpaceRay (SoRayPickAction *const action, const SbMatrix &matrix)
virtual SoDetail * createTriangleDetail (SoRayPickAction *action, const SoPrimitiveVertex *v1, const SoPrimitiveVertex *v2, const SoPrimitiveVertex *v3, SoPickedPoint *pp)
virtual SoDetail * createLineSegmentDetail (SoRayPickAction *action, const SoPrimitiveVertex *v1, const SoPrimitiveVertex *v2, SoPickedPoint *pp)
virtual SoDetail * createPointDetail (SoRayPickAction *action, const SoPrimitiveVertex *v, SoPickedPoint *pp)
void invokeTriangleCallbacks (SoAction *const action, const SoPrimitiveVertex *const v1, const SoPrimitiveVertex *const v2, const SoPrimitiveVertex *const v3)
void invokeLineSegmentCallbacks (SoAction *const action, const SoPrimitiveVertex *const v1, const SoPrimitiveVertex *const v2)
void invokePointCallbacks (SoAction *const action, const SoPrimitiveVertex *const v)
void beginShape (SoAction *const action, const TriangleShape shapetype, SoDetail *const detail=NULL)
void shapeVertex (const SoPrimitiveVertex *const v)
void endShape (void)
void generateVertex (SoPrimitiveVertex *const pv, const SbVec3f &point, const SbBool useTexFunc, const SoTextureCoordinateElement *const tce, const float s, const float t, const SbVec3f &normal)
void generateVertex (SoPrimitiveVertex *const pv, const SbVec3f &point, const SbBool useTexFunc, const SoTextureCoordinateElement *const tce, const float s, const float t, const float r, const SbVec3f &normal)
SbBool startVertexArray (SoGLRenderAction *action, const SoCoordinateElement *coords, const SbVec3f *pervertexnormals, const SbBool texpervertex, const SbBool colorpervertex)
void finishVertexArray (SoGLRenderAction *action, const SbBool vbo, const SbBool normpervertex, const SbBool texpervertex, const SbBool colorpervertex)

Protected Member Functions inherited from SoNode
SoNode (void)
virtual ~SoNode ()
virtual SbBool readInstance (SoInput *in, unsigned short flags)

Protected Member Functions inherited from SoFieldContainer
SoFieldContainer (void)
virtual ~SoFieldContainer ()

Protected Member Functions inherited from SoBase
SoBase (void)
virtual ~SoBase ()
virtual void destroy (void)
SbBool hasMultipleWriteRefs (void) const
SbBool writeHeader (SoOutput *out, SbBool isgroup, SbBool isengine) const
void writeFooter (SoOutput *out) const
virtual const char * getFileFormatName (void) const

Static Protected Member Functions¶

static const SoFieldData ** getFieldDataPtr (void)

Static Protected Member Functions inherited from SoVRMLGeometry
static const SoFieldData ** getFieldDataPtr (void)

Static Protected Member Functions inherited from SoShape
static const SoFieldData ** getFieldDataPtr (void)

Static Protected Member Functions inherited from SoNode
static const SoFieldData ** getFieldDataPtr (void)
static void setNextActionMethodIndex (int index)
static int getNextActionMethodIndex (void)
static void incNextActionMethodIndex (void)
static void setCompatibilityTypes (const SoType &nodetype, const uint32_t bitmask)

Static Protected Member Functions inherited from SoBase
static uint32_t getCurrentWriteCounter (void)
static void staticDataLock (void)
static void staticDataUnlock (void)

Additional Inherited Members¶

Public Types inherited from SoShape
enum TriangleShape { TRIANGLE_STRIP, TRIANGLE_FAN, TRIANGLES, POLYGON, QUADS, QUAD_STRIP, POINTS, LINES, LINE_STRIP }

Public Types inherited from SoNode
enum NodeType { INVENTOR = 0x0000, VRML1 = 0x0001, VRML2 = 0x0002, INVENTOR_1 = 0x0004, INVENTOR_2_0 = 0x0008, INVENTOR_2_1 = 0x0010, INVENTOR_2_5 = 0x0020, INVENTOR_2_6 = 0x0040, COIN_1_0 = 0x0080, COIN_2_0 = 0x0100, EXTENSION = 0x0200, COIN_2_2 = 0x0400, COIN_2_3 = 0x0800, COIN_2_4 = 0x1000, INVENTOR_5_0 = 0x2000, COIN_2_5 = 0x4000, COIN_3_0 = 0x8000, INVENTOR_6_0 = 0x10000 }

Protected Types inherited from SoBase
enum BaseFlags { IS_ENGINE = 0x01, IS_GROUP = 0x02 }

Protected Attributes inherited from SoNode
uint32_t uniqueId

Protected Attributes inherited from SoFieldContainer
SbBool isBuiltIn

Static Protected Attributes inherited from SoNode
static uint32_t nextUniqueId = 1
static int nextActionMethodIndex = 0

Detailed Description¶

The SoVRMLElevationGrid class is used to represent elevation grids.

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:

ElevationGrid {


  eventIn      MFFloat  set_height


  exposedField SFNode   color             NULL


  exposedField SFNode   normal            NULL


  exposedField SFNode   texCoord          NULL


  field        MFFloat  height            []      # (-inf,inf)


  field        SFBool   ccw               TRUE


  field        SFBool   colorPerVertex    TRUE


  field        SFFloat  creaseAngle       0       # [0,inf]


  field        SFBool   normalPerVertex   TRUE


  field        SFBool   solid             TRUE


  field        SFInt32  xDimension        0       # [0,inf)


  field        SFFloat  xSpacing          1.0     # (0,inf)


  field        SFInt32  zDimension        0       # [0,inf)


  field        SFFloat  zSpacing          1.0     # (0,inf)
}

The ElevationGrid node specifies a uniform rectangular grid of varying height in the Y=0 plane of the local coordinate system. The geometry is described by a scalar array of height values that specify the height of a surface above each point of the grid.

The xDimension and zDimension fields indicate the number of elements of the grid height array in the X and Z directions. Both xDimension and zDimension shall be greater than or equal to zero. If either the xDimension or the zDimension is less than two, the ElevationGrid contains no quadrilaterals. The vertex locations for the rectangles are defined by the height field and the xSpacing and zSpacing fields:

•: The height field is an xDimension by zDimension array of scalar values representing the height above the grid for each vertex.

•: The xSpacing and zSpacing fields indicate the distance between vertices in the X and Z directions respectively, and shall be greater than zero.

Thus, the vertex corresponding to the point P[i, j] on the grid is placed at:



  P[i,j].x = xSpacing × i


  P[i,j].y = height[ i + j × xDimension]


  P[i,j].z = zSpacing × j     


  where 0 <= i < xDimension and 0 <= j < zDimension, and 


  P[0,0] is height[0] units above/below the origin of the local


  coordinate system

The set_height eventIn allows the height MFFloat field to be changed to support animated ElevationGrid nodes.

The color field specifies per-vertex or per-quadrilateral colours for the ElevationGrid node depending on the value of colorPerVertex. If the color field is NULL, the ElevationGrid node is rendered with the overall attributes of the Shape node enclosing the ElevationGrid node (see 4.14, Lighting model).

The colorPerVertex field determines whether colours specified in the color field are applied to each vertex or each quadrilateral of the ElevationGrid node. If colorPerVertex is FALSE and the color field is not NULL, the color field shall specify a Color node containing at least (xDimension-1)×(zDimension-1) colours; one for each quadrilateral, ordered as follows:



  QuadColor[i,j] = Color[ i + j × (xDimension-1)]


  where 0 <= i < xDimension-1 and 0 <= j < zDimension-1, and


  QuadColor[i,j] is the colour for the quadrilateral defined by


  height[i+j×xDimension], height[(i+1)+j×xDimension],


  height[(i+1)+(j+1)×xDimension] and height[i+(j+1)×xDimension]

If colorPerVertex is TRUE and the color field is not NULL, the color field shall specify a Color node containing at least xDimension × zDimension colours, one for each vertex, ordered as follows:



  VertexColor[i,j] = Color[ i + j × xDimension] 


  where 0 <= i < xDimension and 0 <= j < zDimension, and 


  VertexColor[i,j] is the colour for the vertex defined by 


  height[i+j×xDimension]

The normal field specifies per-vertex or per-quadrilateral normals for the ElevationGrid node. If the normal field is NULL, the browser shall automatically generate normals, using the creaseAngle field to determine if and how normals are smoothed across the surface (see 4.6.3.5, Crease angle field).

The normalPerVertex field determines whether normals are applied to each vertex or each quadrilateral of the ElevationGrid node depending on the value of normalPerVertex. If normalPerVertex is FALSE and the normal node is not NULL, the normal field shall specify a Normal node containing at least (xDimension-1)×(zDimension-1) normals; one for each quadrilateral, ordered as follows:



  QuadNormal[i,j] = Normal[ i + j × (xDimension-1)] 


  where 0 <= i < xDimension-1 and 0 <= j < zDimension-1, and 


  QuadNormal[i,j] is the normal for the quadrilateral 


  defined by height[i+j×xDimension], height[(i+1)+j×xDimension], 


  height[(i+1)+(j+1)×xDimension] and height[i+(j+1)×xDimension]

If normalPerVertex is TRUE and the normal field is not NULL, the normal field shall specify a Normal node containing at least xDimension × zDimension normals; one for each vertex, ordered as follows:



  VertexNormal[i,j] = Normal[ i + j × xDimension] 


  


  where 0 <= i < xDimension and 0 <= j < zDimension, and


  VertexNormal[i,j] is the normal for the vertex defined by


  height[i+j×xDimension]

The texCoord field specifies per-vertex texture coordinates for the ElevationGrid node. If texCoord is NULL, default texture coordinates are applied to the geometry. The default texture coordinates range from (0,0) at the first vertex to (1,1) at the last vertex. The S texture coordinate is aligned with the positive X-axis, and the T texture coordinate with positive Z-axis. If texCoord is not NULL, it shall specify a TextureCoordinate node containing at least (xDimension)×(zDimension) texture coordinates; one for each vertex, ordered as follows:



  VertexTexCoord[i,j] = TextureCoordinate[ i + j × xDimension] 


  where 0 <= i < xDimension and 0 <= j < zDimension, and 


  VertexTexCoord[i,j] is the texture coordinate for the vertex 


  defined by height[i+j×xDimension]

The ccw, solid, and creaseAngle fields are described in 4.6.3, Shapes and geometry. By default, the quadrilaterals are defined with a counterclockwise ordering. Hence, the Y-component of the normal is positive. Setting the ccw field to FALSE reverses the normal direction. Backface culling is enabled when the solid field is TRUE. See Figure 6.5 for a depiction of the ElevationGrid node.

Figure 6.5

Constructor & Destructor Documentation¶

SoVRMLElevationGrid::SoVRMLElevationGrid (void)¶

Constructor.

SoVRMLElevationGrid::~SoVRMLElevationGrid (void) [protected], [virtual]¶

Destructor.

Member Function Documentation¶

SoType SoVRMLElevationGrid::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.

Reimplemented from SoVRMLGeometry.

const SoFieldData * SoVRMLElevationGrid::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 SoVRMLGeometry.

void SoVRMLElevationGrid::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 SoVRMLElevationGrid::rayPick (SoRayPickAction * action) [virtual]¶

Calculates picked point based on primitives generated by subclasses.

Reimplemented from SoShape.

void SoVRMLElevationGrid::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 SoVRMLElevationGrid::notify (SoNotList * l) [protected], [virtual]¶

Notifies all auditors for this instance when changes are made.

Reimplemented from SoVRMLGeometry.

void SoVRMLElevationGrid::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 SoVRMLElevationGrid::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¶

SoSFBool SoVRMLElevationGrid::ccw¶

Specifies whether generated triangles are counterclockwise. Default value is TRUE.

SoSFBool SoVRMLElevationGrid::solid¶

Specifies whether backface culling should be done. Default value is TRUE.

SoSFFloat SoVRMLElevationGrid::creaseAngle¶

Specifies the normal calculation crease angle.

SoSFInt32 SoVRMLElevationGrid::zDimension¶

Specifies the number of points in the z dimension.

SoSFInt32 SoVRMLElevationGrid::xDimension¶

Specifies the number of points in the x dimension.

SoSFFloat SoVRMLElevationGrid::zSpacing¶

Specifies the spacing between points in the z dimension. Default value is 1.0.

SoSFFloat SoVRMLElevationGrid::xSpacing¶

Specifies the spacing between points in the x dimension. Default value is 1.0.

SoMFFloat SoVRMLElevationGrid::height¶

Contains the array of height values.

SoSFNode SoVRMLElevationGrid::texCoord¶

Can contain an SoVRMLTextureCoordinate node containing one texture coordinate per grid point.

SoSFNode SoVRMLElevationGrid::normal¶

Can contain an SoVRMLTextureCoordinate node containing normals for the grid.

SoSFNode SoVRMLElevationGrid::color¶

Can contain an SoVRMLColor node containing grid colors.

SoSFBool SoVRMLElevationGrid::colorPerVertex¶

Specifies whether colors should be applied per vertex. Default value is TRUE.

SoSFBool SoVRMLElevationGrid::normalPerVertex¶

Specifies whether normals should be applied per vertex. Default value is TRUE.

Author¶

Generated automatically by Doxygen for Coin from the source code.

Version 3.1.3

Coin

Source file:	SoVRMLElevationGrid.3.en.gz (from Coin-devel 3.1.3-7.1)
Source last updated:	2024-05-08T09:17:19Z
Converted to HTML:	2024-11-21T01:43:48Z