SoGeometryShader - Online Linux Manual PageSection : 3
Updated : Mon Jan 25 2021
Source : Version 2.5.0
Note : Coin
NAMESoGeometryShader − The SoGeometryShader class is used for loading geometry shader programs.
SYNOPSIS
#include <Inventor/nodes/SoGeometryShader.h> Inherits SoShaderObject.
Public Typesenum InputType { POINTS_IN, LINES_IN, TRIANGLES_IN }
enum OutputType { POINTS_OUT, LINE_STRIP_OUT, TRIANGLE_STRIP_OUT }
Public Member Functionsvirtual SoType getTypeId (void) const
SoGeometryShader (void)
virtual ~SoGeometryShader ()
virtual void GLRender (SoGLRenderAction *action)
Static Public Member Functionsstatic SoType getClassTypeId (void)
static void initClass (void)
static SbBool isSupported (SourceType sourceType)
Public AttributesSoSFEnum inputType
SoSFEnum outputType
SoSFInt32 maxEmit
Protected Member Functionsvirtual const SoFieldData * getFieldData (void) const
Static Protected Member Functionsstatic const SoFieldData ** getFieldDataPtr (void)
Additional Inherited Members
Detailed DescriptionThe SoGeometryShader class is used for loading geometry shader programs. See Shaders in Coin for more information on how to set up a scene graph with shaders. FILE FORMAT/DEFAULTS: GeometryShader {
isActive TRUE
sourceType FILENAME
sourceProgram ""
parameter []
inputType TRIANGLES_IN
outputType TRIANGLE_STRIP_OUT
maxEmit 8
}
See also SoShaderObject SoShaderProgram Since Coin 2.5
Member Enumeration Documentation
enum SoGeometryShader::InputTypeEnumerates the input types. Enumerator POINTS_IN Shader uses points as input. LINES_IN Shader uses lines as input. TRIANGLES_IN Shader uses triangles as input. OpenGL will automatically convert quads and polygons into triangles.
enum SoGeometryShader::OutputTypeEnumerates the output types. Enumerator POINTS_OUT Shader generates points. LINE_STRIP_OUT Shader generates line strips.
Constructor & Destructor Documentation
SoGeometryShader::SoGeometryShader (void)Constructor. References inputType, LINE_STRIP_OUT, LINES_IN, maxEmit, outputType, POINTS_IN, POINTS_OUT, and TRIANGLES_IN.
SoGeometryShader::~SoGeometryShader () [virtual]Destructor.
Member Function Documentation
SoType SoGeometryShader::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
}
else if (node->getTypeId().isOfType(SoGroup::getClassTypeId())) {
SoGroup * group = (SoGroup *)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 SoShaderObject.
const SoFieldData * SoGeometryShader::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 SoShaderObject.
void SoGeometryShader::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 SoShaderObject. References SoAction::getState(), SoShaderObject::GLRender(), inputType, SoShaderObject::isActive, LINE_STRIP_OUT, LINES_IN, maxEmit, outputType, POINTS_IN, POINTS_OUT, SoDebugError::post(), and TRIANGLES_IN.
SbBool SoGeometryShader::isSupported (SourceType sourceType) [static]Returns a boolean indicating whether the requested source type is supported by the OpenGL driver or not. Beware: To get a correct answer, a valid OpenGL context must be available. References SoShaderObject::ARB_PROGRAM, SoShaderObject::CG_PROGRAM, SoShaderObject::GLSL_PROGRAM, and SoShaderObject::sourceType.
Member Data Documentation
SoSFEnum SoGeometryShader::inputTypeThe type of geometry used as input to the shader. Default value is TRIANGLES_IN. Referenced by GLRender(), and SoGeometryShader().
SoSFEnum SoGeometryShader::outputTypeThe type of geometry generated from the shader. Default value is TRIANGLE_FAN_OUT. Referenced by GLRender(), and SoGeometryShader().
SoSFInt32 SoGeometryShader::maxEmitThe maximum number of vertices emitted from the shader. Default value is 8. This corresponds to the GL_GEOMETRY_VERTICES_OUT_EXT enum. Referenced by GLRender(), and SoGeometryShader().
AuthorGenerated automatically by Doxygen for Coin from the source code. 0
Johanes Gumabo
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