Isosurface property node More...
#include <VolumeViz/nodes/SoVolumeIsosurface.h>
Public Member Functions | |
virtual SoType | getTypeId () const |
Returns the type identifier for this specific instance. | |
SoVolumeIsosurface () | |
Constructor. | |
Public Member Functions inherited from SoVolumeShader | |
SoVolumeShader () | |
Constructor. | |
virtual SoFragmentShader * | setFragmentShader (int pos, const SbString &filenameOrSource, SoShaderObject::SourceType sourceType=SoShaderObject::FILENAME) |
Creates a fragment shader with the given filename and add it at the given pos. | |
virtual SoVertexShader * | setVertexShader (int pos, const SbString &filenameOrSource, SoShaderObject::SourceType sourceType=SoShaderObject::FILENAME) |
Creates a vertex shader with the given filename and adds it at the given pos. | |
Public Member Functions inherited from SoShaderProgram | |
SoShaderProgram () | |
Constructor. | |
SoFragmentShader * | getFragmentShader (int pos) const |
Returns the fragment shader at the specified position. | |
SoVertexShader * | getVertexShader (int pos) const |
Returns the vertex shader at the specified position. | |
SoGeometryShader * | getGeometryShader (int pos) const |
Returns the geometry shader at the specified position. | |
virtual SoGeometryShader * | setGeometryShader (int pos, const SbString &filenameOrSource, SoShaderObject::SourceType sourceType=SoShaderObject::FILENAME) |
Convenience method to create a geometry shader with the specified filename and add it at the specified position. | |
virtual SoComputeShader * | setComputeShader (int pos, const SbString &filenameOrSource, SoShaderObject::SourceType sourceType=SoShaderObject::FILENAME) |
Convenience method to create a compute shader with the specified filename and add it at the specified position. | |
SoTessellationControlShader * | getTessellationControlShader (int pos) const |
Returns the tessellation control shader at the specified position. | |
SoTessellationEvaluationShader * | getTessellationEvaluationShader (int pos) const |
Returns the tessellation evaluation shader at the specified position. | |
virtual SoTessellationControlShader * | setTessellationControlShader (int pos, const SbString &filenameOrSource, SoShaderObject::SourceType sourceType=SoShaderObject::FILENAME) |
Convenience method to create a tessellation control shader with the specified filename and add it at the specified position. | |
virtual SoTessellationEvaluationShader * | setTessellationEvaluationShader (int pos, const SbString &filenameOrSource, SoShaderObject::SourceType sourceType=SoShaderObject::FILENAME) |
Convenience method to create a tessellation evaluation shader with the specified filename and add it at the specified position. | |
SoShaderParameterImage * | addShaderParameterImage (const SbString &name, SoTexture *tex) |
Convenience method to create an SoShaderParameterImage with the specified name and value and add it to this shader program. | |
Public Member Functions inherited from SoNode | |
virtual void | setOverride (const SbBool state) |
Turns the override flag on or off. | |
virtual SbBool | isOverride () const |
Returns the state of the override flag. | |
virtual SoNode * | copy (SbBool copyConnections=FALSE) const |
Creates and returns an exact copy of the node. | |
virtual SbBool | affectsState () const |
Returns TRUE if a node has an effect on the state during traversal. | |
virtual void | touch () |
Marks an instance as modified, simulating a change to it. | |
Public Member Functions inherited from SoFieldContainer | |
void | setToDefaults () |
Sets all fields in this object to their default values. | |
SbBool | hasDefaultValues () const |
Returns TRUE if all of the object's fields have their default values. | |
SbBool | fieldsAreEqual (const SoFieldContainer *fc) const |
Returns TRUE if this object's fields are exactly equal to fc's fields. | |
void | copyFieldValues (const SoFieldContainer *fc, SbBool copyConnections=FALSE) |
Copies the contents of fc's fields into this object's fields. | |
SoNONUNICODE SbBool | set (const char *fieldDataString) |
Sets one or more fields in this object to the values specified in the given string, which should be a string in the Open Inventor file format. | |
SbBool | set (const SbString &fieldDataString) |
Sets one or more fields in this object to the values specified in the given string, which should be a string in the Open Inventor file format. | |
void | get (SbString &fieldDataString) |
Returns the values of the fields of this object in the Open Inventor ASCII file format in the given string. | |
virtual int | getFields (SoFieldList &list) const |
Appends references to all of this object's fields to resultList, and returns the number of fields appended. | |
virtual int | getAllFields (SoFieldList &list) const |
Returns a list of fields, including the eventIn's and eventOut's. | |
virtual SoField * | getField (const SbName &fieldName) const |
Returns a the field of this object whose name is fieldName. | |
virtual SoField * | getEventIn (const SbName &fieldName) const |
Returns a the eventIn with the given name. | |
virtual SoField * | getEventOut (const SbName &fieldName) const |
Returns the eventOut with the given name. | |
SbBool | getFieldName (const SoField *field, SbName &fieldName) const |
Returns the name of the given field in the fieldName argument. | |
SbBool | enableNotify (SbBool flag) |
Notification at this Field Container is enabled (if flag == TRUE) or disabled (if flag == FALSE). | |
SbBool | isNotifyEnabled () const |
Notification is the process of telling interested objects that this object has changed. | |
virtual void | setUserData (void *data) |
Sets application data. | |
void * | getUserData (void) const |
Gets user application data. | |
Public Member Functions inherited from SoBase | |
virtual SbName | getName () const |
Returns the name of an instance. | |
virtual void | setName (const SbName &name) |
Sets the name of an instance. | |
void | setSynchronizable (const bool b) |
Sets this to be a ScaleViz synchronizable object. | |
bool | isSynchronizable () const |
Gets the ScaleViz synchronizable state of this object. | |
Public Member Functions inherited from SoRefCounter | |
void | ref () const |
Adds a reference to an instance. | |
void | unref () const |
Removes a reference from an instance. | |
void | unrefNoDelete () const |
unrefNoDelete() should be called when it is desired to decrement the reference count, but not delete the instance if this brings the reference count to zero. | |
int | getRefCount () const |
Returns current reference count. | |
void | lock () const |
lock this instance. | |
void | unlock () const |
unlock this instance. | |
Public Member Functions inherited from SoTypedObject | |
SbBool | isOfType (const SoType &type) const |
Returns TRUE if this object is of the type specified in type or is derived from that type. | |
template<typename TypedObjectClass > | |
SbBool | isOfType () const |
Returns TRUE if this object is of the type of class TypedObjectClass or is derived from that class. | |
Static Public Member Functions | |
static SoType | getClassTypeId () |
Returns the type identifier for this class. | |
Static Public Member Functions inherited from SoVolumeShader | |
static SoType | getClassTypeId () |
Returns the type identifier for this class. | |
static SbBool | isSupported (SoState *state=NULL) |
Returns TRUE if SoVolumeShader is supported by the current graphics board. | |
Static Public Member Functions inherited from SoShaderProgram | |
static SoType | getClassTypeId () |
Returns the type identifier for this class. | |
static unsigned int | getNumReservedTextures () |
Returns the number of reserved texture units. | |
Static Public Member Functions inherited from SoNode | |
static SoType | getClassTypeId () |
Returns the type identifier for this class. | |
static SoNode * | getByName (const SbName &name) |
A node's name can be set using SoBase::setName(). | |
static int | getByName (const SbName &name, SoNodeList &list) |
A node's name can be set using SoBase::setName(). | |
Static Public Member Functions inherited from SoFieldContainer | |
static SoType | getClassTypeId () |
Returns the type of this class. | |
Static Public Member Functions inherited from SoBase | |
static SoType | getClassTypeId () |
Returns type identifier for this class. | |
Static Public Member Functions inherited from SoTypedObject | |
static SoType | getClassTypeId () |
Returns the type identifier for this class. | |
Public Attributes | |
SoMFFloat | isovalues |
Specifies the list of isovalues to display. | |
Public Attributes inherited from SoVolumeShader | |
SoSFBool | forVolumeOnly |
Set to TRUE if the shader should be called for volume rendering (SoVolumeRender). | |
SoSFBool | interpolateOnMove |
When set to FALSE, interpolation between LDM tiles (across the tile boundary) is not done when rendering in interactive mode. | |
Public Attributes inherited from SoShaderProgram | |
SoMFNode | shaderObject |
Specifies the list of shader objects (i.e., vertex shaders, geometry and fragment shaders) which form the shader program. | |
SoSFEnum | geometryInputType |
Specifies the input primitive type of the current geometry shader if any (not used otherwise). | |
SoSFEnum | geometryOutputType |
Specifies the output primitive type of the current geometry shader if any (not used otherwise). | |
SoSFBool | vertexProgramTwoSide |
If set to TRUE, vertex shaders will operate in two-sided color mode. | |
SoSFBool | shadowShader |
Only used when an SoShadowGroup is active. | |
SoSFInt32 | maxGeometryOutputVertices |
Set the maximum number of vertices the geometry shader will emit in one invocation. | |
SoSFBool | generateTransparency |
If set to TRUE, then shapes affected by this shader will be considered transparent. | |
SoSFInt32 | patchLength |
Set the length of the fixed-size collection of vertices used by tessellation shaders. | |
SoMFNode | bufferObjects |
Specifies a list of SoShaderParameterBufferObject to use with this shader. | |
SoMFNode | images |
Specifies a list of SoShaderParameterImage nodes to use with this shader. | |
Additional Inherited Members | |
Public Types inherited from SoVolumeShader | |
enum | ShaderPosition { GEOMETRY_MAIN =0 , DATA_COMBINE_FUNCTION , GET_DATA_FUNCTION , FRAGMENT_COMPUTE_COLOR , VERTEX_MAIN , FRAGMENT_MAIN , VERTEX_POSTPROCESSING , CLIPPING_FUNCTION , TESS_VERTEX_SHIFT , CUSTOM_SHADER = 64 } |
Specifies the position of the shader pipeline stages in the field shaderObject. More... | |
Public Types inherited from SoShaderProgram | |
enum | GeometryInputType { POINTS_INPUT = GL_POINTS , LINES_INPUT = GL_LINES , TRIANGLES_INPUT = GL_TRIANGLES } |
Geometry input type. More... | |
enum | GeometryOutputType { POINTS_OUTPUT = GL_POINTS , LINE_STRIP_OUTPUT = GL_LINE_STRIP , TRIANGLE_STRIP_OUTPUT = GL_TRIANGLE_STRIP } |
Geometry ouput type. More... | |
This property node causes subsequent SoVolumeRender nodes to draw isosurfaces instead of classical volume rendering of the volume data defined by the current SoVolumeData.
This is functionally equivalent to using an SoVolumeDataDrawStyle node with the style field set to ISOSURFACE, but is much simpler when you only need to display an iso surface.
The isosurfaces are only rendered, not geometrically computed. So it is not possible to directly get the geometry corresponding to the rendered isosurface. (The MeshViz extension includes algorithms to extract an isosurface as geometry, see MoMeshIsosurface.)
The isovalues to display are specified in the isovalues field.
You may not use both SoVolumeShader and SoVolumeIsosurface with the same SoVolumeRender node. However since Open Inventor 7.1 it is possible to use both SoVolumeRenderingQuality and SoVolumeIsosurface with SoVolumeRender.
Remember this is a shader node. The effect will usually be undesirable if it is applied to standard geometry (polygons, lines, etc). Therefore applications should generally keep the volume visualization nodes and standard geometry nodes separate in the scene graph (i.e. under different SoSeparator nodes).
The multiple fields SoMaterial::diffuseColor, SoMaterial::transparency, SoMaterial::specularColor, and SoMaterial::shininess of the current SoMaterial specify the material of each isosurface. All isosurfaces share the first SoMaterial::specularColor and SoMaterial::shininess. The first material will be for the first isosurface, the second material for the second isosurface, and so on.
Surfaces are lighted with the first directional light found in the scene graph. No other lights affect the isosurface. Note: The isosurfaces are always lighted, regardless of the value of the SoVolumeRenderingQuality lighting and deferredLighting fields.
The isosurface displays the boundary between 2 different values, similar to the marching cubes algorithms. In other words, a voxel is part of the isosurface if the ray entry and exit values for the voxel are different and include the specified isosurface value in their range. If you render, for example, the isosurface 100 of a volume data containing the value 100 everywhere, nothing will be rendered.
Because of linear interpolation, basic isosurface may not render correctly on segmented dataset like label field. In this case, you should use the SoVolumeRenderingQuality::segmentedInterpolation or SoVolumeRenderingQuality::colorInterpolation fields. Default Linear interpolation may also generate rough result even for scalar datasets. For a smoother surface, you may have to use cubic interpolation. Please refer to SoVolumeShape::interpolation for details.
Because this node is derived from SoVolumeShader, IVVR_FIRST_RESERVED_TEXTURE_UNIT applies to it. See SoVolumeShader for more information.
Note: The volume size and orientation (like geometry) can be modified by transformation nodes in the scene graph and this in turn modifies the appearance of volume rendering nodes like SoVolumeIsosurface. However the same transformation must be applied to the volume data node and all volume rendering nodes associated with that volume. So effectively any transformation nodes that affect the volume must be placed <B> before </B> the volume data node.
isovalues | [] |
SoVolumeRender, SoVolumeShader, SoVolumeRenderingQuality, SoPreferences
Definition at line 125 of file SoVolumeIsosurface.h.
SoVolumeIsosurface::SoVolumeIsosurface | ( | ) |
Constructor.
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static |
Returns the type identifier for this class.
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virtual |
Returns the type identifier for this specific instance.
Reimplemented from SoVolumeShader.
SoMFFloat SoVolumeIsosurface::isovalues |
Specifies the list of isovalues to display.
Definition at line 138 of file SoVolumeIsosurface.h.