Open Inventor Release 2024.2.0
 
Loading...
Searching...
No Matches
Public Member Functions | Static Public Member Functions | List of all members
SoFragmentShader Class Reference
Inventor » Nodes » Shaders

VSG extension Node that defines a fragment shader. More...

#include <Inventor/nodes/SoFragmentShader.h>

+ Inheritance diagram for SoFragmentShader:

Public Member Functions

virtual SoType getTypeId () const
 Returns the type identifier for this specific instance.
 
 SoFragmentShader ()
 Constructor.
 
virtual ShaderType getShaderType () const
 Returns the shader type.
 
- Public Member Functions inherited from SoShaderObject
template<typename UniformParamType , typename ParamValueType >
UniformParamType * addShaderParameter (const SbString &name, ParamValueType val)
 Convenience method to create an SoShaderUniformParameter with the specified name and value and add it to the given shader object.
 
template<typename UniformParamType , typename ParamValueType >
void setShaderParameter (const SbString &name, ParamValueType val)
 UniformParamType is the type of parameter to set.
 
- 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 SbBool isSupported (SoShaderObject::SourceType sourceType, SoState *state=NULL)
 Indicates if fragment shaders in the specified language are supported by your graphics board.
 
static unsigned int getMaxTextureImageUnit ()
 Returns the maximum number of texture image units.
 
- Static Public Member Functions inherited from SoShaderObject
static SoType getClassTypeId ()
 Returns the type identifier for this class.
 
- 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.
 

Additional Inherited Members

- Public Types inherited from SoShaderObject
enum  SourceType {
  ARB_PROGRAM ,
  CG_PROGRAM ,
  GLSL_PROGRAM ,
  FILENAME
}
 Shader Object source type possible values. More...
 
enum  ShaderType {
  VERTEX_SHADER = SbEnums::SHADER_TYPE_VERTEX ,
  GEOMETRY_SHADER = SbEnums::SHADER_TYPE_GEOMETRY ,
  FRAGMENT_SHADER = SbEnums::SHADER_TYPE_FRAGMENT ,
  TESSELLATION_CONTROL_SHADER = SbEnums::SHADER_TYPE_TESS_CTRL ,
  TESSELLATION_EVALUATION_SHADER = SbEnums::SHADER_TYPE_TESS_EVAL ,
  COMPUTE_SHADER = SbEnums::SHADER_TYPE_COMPUTE
}
 Type of the shader. More...
 
- Public Attributes inherited from SoShaderObject
SoSFBool isActive
 Specifies if the shader object is active or not.
 
SoSFEnum sourceType
 Specifies the shader object's source type.
 
SoSFFilePathString sourceProgram
 Contains the shader object's source program, specified by a filename (sourceType set to FILENAME) or by the string containing the program (sourceType set to GLSL_PROGRAM).
 
SoMFUniformShaderParameter parameter
 Contains the shader's uniform parameters.
 

Detailed Description

VSG extension Node that defines a fragment shader.

This node defines a fragment shader.

See SoShaderProgram for general information about using shaders and shader parameters.

See parent class SoShaderObject for details about using the inherited fields.

Notes:

  • Shaders in the scene graph.
    Shader object nodes cannot be inserted directly in a scene graph.
    They must be added to the shaderObject field of an SoShaderProgram node.
  • Predefined GLSL variables.
    Open Inventor uses a compatibility profile context for rendering. So legacy GLSL predefined variables, for example gl_FragColor, can be used in fragment shaders. However, if you use the GLSL "#version" directive in a shader, you should append the keyword "compatibility", for example: "#version 150 compatibility".
  • Transparency.
    To maintain compatibility with Open Inventor's high quality transparency algorithms like SORTED_PIXEL, fragment shaders should not output a color by setting gl_FragColor (or equivalent parameter) directly. Use the GLSL method OivDepthPeelingOutputColor() instead.

    Fragment shaders can access the depthPeeling API using Open Inventor's built-in "include" mechanism as shown below. (Note: In the "oiv_include" statement there must not be any white space in the string "//!oiv_include". The space character shown below is required by a limitation of our documentation tools.)
    // Fragment shader GLSL code
    // !oiv_include <Inventor/oivDepthPeeling_frag.h>
    void main()
    {
    if (OivDepthPeel( gl_FragCoord.xyz )) {
    // Compute and set fragment color
    vec4 color = . . .
    OivDepthPeelingOutputColor( color );
    }
    }
    OivDepthPeel
    bool OivDepthPeel(vec3 fragmentCoords)
    This method peels the current fragment.
  • Transparency.
    If a fragment shader makes geometry transparent (sets alpha values < 1), the application should set the SoShaderProgram::generateTransparency field to true. This ensures that Open Inventor knows to apply the correct handling for the current transparency mode.
  • Shadows.
    To integrate with Open Inventor's shadow casting algorithm, fragment shaders should call the GLSL methods OivComputeShadow() and OivGenerateShadowMap(). Please see SoShadowGroup for example code.

FILE FORMAT/DEFAULT

    FragmentShader {
    sourceProgram ""
    sourceType FILENAME
    isActive TRUE
    parameter NULL
    }

SEE ALSO

SoGeometryShader, SoShaderObject, SoShaderProgram, SoTessellationControlShader, SoTessellationEvaluationShader, SoUniformShaderParameter, SoVertexShader

Definition at line 115 of file SoFragmentShader.h.

Constructor & Destructor Documentation

◆ SoFragmentShader()

SoFragmentShader::SoFragmentShader ( )

Constructor.

Member Function Documentation

◆ getClassTypeId()

static SoType SoFragmentShader::getClassTypeId ( )
static

Returns the type identifier for this class.


◆ getMaxTextureImageUnit()

static unsigned int SoFragmentShader::getMaxTextureImageUnit ( )
static

Returns the maximum number of texture image units.

◆ getShaderType()

virtual ShaderType SoFragmentShader::getShaderType ( ) const
inlinevirtual

Returns the shader type.

Implements SoShaderObject.

Definition at line 140 of file SoFragmentShader.h.

◆ getTypeId()

virtual SoType SoFragmentShader::getTypeId ( ) const
virtual

Returns the type identifier for this specific instance.

Reimplemented from SoShaderObject.

◆ isSupported()

static SbBool SoFragmentShader::isSupported ( SoShaderObject::SourceType  sourceType,
SoState *  state = NULL 
)
static

Indicates if fragment shaders in the specified language are supported by your graphics board.

When using a debug build of Open Inventor, some "no context available" warning messages may be generated. You can ignore them or see SoGLExtension for an example of using SoGLContext to avoid them.

The documentation for this class was generated from the following file: