Renders a scene graph using Open Inventor's Render Engine. More...
#include <Inventor/actions/SoGLRenderAction.h>
Public Types | |
enum | TransparencyType { NO_TRANSPARENCY , NO_SORT , OPAQUE_FIRST , SORTED_OBJECT , SORTED_PIXEL } |
Transparency rendering algorithm. More... | |
enum | FastEditSavePolicy { DISABLE , EACH_FRAME , WHEN_NEEDED } |
Fast edit traversal types. More... | |
enum | AbortCode { CONTINUE , ABORT , PRUNE , DELAY } |
Possible return codes from a render abort callback. More... | |
enum | InvalidateCacheMode { OFF , ONCE , ALWAYS } |
Invalidate cache mode. More... | |
enum | AutoCacheMode { DO_AUTO_CACHE = 1 , DONT_AUTO_CACHE = 2 } |
Two bits are stored. More... | |
typedef AbortCode | SoGLRenderAbortCB(void *userData) |
Callback functions for render abort should be of this type. | |
Public Types inherited from SoAction | |
enum | DistribMode { LOCAL_ONLY , CLUSTER_ONLY , ALL } |
This is used to define the way an action is distributed across a cluster. More... | |
enum | AppliedCode { NODE , PATH , PATH_LIST } |
This enum is used to determine what the action is being applied to. More... | |
enum | PathCode { NO_PATH , IN_PATH , BELOW_PATH , OFF_PATH } |
This enum may be used during traversal of nodes to indicate where the node is with respect to the path being traversed. More... | |
Public Member Functions | |
virtual SoType | getTypeId () const |
Returns the type identifier for this specific instance. | |
SoGLRenderAction (const SbViewportRegion &viewportRegion) | |
Constructor. | |
void | setViewportRegion (const SbViewportRegion &newRegion) |
Changes viewport region to use for rendering. | |
const SbViewportRegion & | getViewportRegion () const |
Returns viewport region to use for rendering. | |
void | setLogicalViewportRegion (const SbViewportRegion &newLogicalRegion) |
Sets current logical viewport region to use for rendering. | |
const SbViewportRegion & | getLogicalViewportRegion () const |
Returns current logical viewport region. | |
void | setUpdateArea (const SbVec2f &origin, const SbVec2f &size) |
Sets the current update area, which is the rectangular area of the viewport region that will actually be rendered into. | |
void | getUpdateArea (SbVec2f &origin, SbVec2f &size) const |
Returns the current update area. | |
void | setAbortCallback (SoGLRenderAbortCB *func, void *userData) |
Sets callback to call during rendering to test for an abort condition. | |
void | setTransparencyType (TransparencyType type) |
Sets global transparency algorithm to use when rendering. | |
TransparencyType | getTransparencyType () const |
Returns transparency quality level to use when rendering. | |
void | setFastEditSavePolicy (FastEditSavePolicy policy, SbBool fastEditDelayedObjects=FALSE) |
Sets fast editing save policy to use when rendering. | |
FastEditSavePolicy | getFastEditSavePolicy () const |
Returns fast editing save policy used when rendering. | |
SoDEPRECATED void | setSmoothing (SbBool smooth) |
Sets smoothing flag. | |
SoDEPRECATED SbBool | isSmoothing () const |
Returns smoothing flag. | |
void | setNumPasses (int num) |
Sets number of rendering passes for multipass antialiasing. | |
int | getNumPasses () const |
Gets number of rendering passes for multipass rendering. | |
void | setPassUpdate (SbBool flag) |
Sets a flag indicating whether intermediate results are displayed after each antialiasing pass for progressive improvement (default is FALSE). | |
SbBool | isPassUpdate () const |
Returns a flag indicating whether intermediate results are displayed after each antialiasing pass for progressive improvement. | |
void | setPassCallback (SoGLRenderPassCB *func, void *userData) |
Sets a callback function to invoke between passes when antialiasing. | |
void | setCacheContext (uint32_t context) |
Sets the OpenGL cache context. | |
uint32_t | getCacheContext () const |
Returns the OpenGL cache context id for this action. | |
void | setSortedLayersNumPasses (int num) |
Sets the number of rendering passes used when transparency type is SORTED_PIXEL. | |
int | getSortedLayersNumPasses () const |
Returns the number of rendering passes used when transparency type is SORTED_PIXEL. | |
void | setAlphaTest (SbBool flag) |
Enable or disable the OpenGL alpha test for rendering. | |
SbBool | isAlphaTest () const |
Returns whether the OpenGL alpha test is enabled for rendering. | |
void | setRenderingIsRemote (SbBool flag) |
Sets whether or not "remote" rendering is done. | |
SbBool | getRenderingIsRemote () const |
Returns TRUE if remote rendering is being done. | |
virtual void | invalidateState () |
Invalidate the state, forcing it to be recreated at the next apply. | |
void | setDecimationValue (SoDecimationTypeElement::Type type, float percentage=1.0) |
Sets decimation percentage, the value should be a number between 0.0 and 1.0 Useful for reducing the number of triangles rendered in the scene. | |
SoDecimationTypeElement::Type | getDecimationType () |
Gets decimation type. | |
float | getDecimationPercentage () |
Gets decimation percentage, the value should be a number between 0.0 and 1.0. | |
void | setInvalidateCacheMode (InvalidateCacheMode icm) |
Enables or disables the invalidation of render caches. | |
InvalidateCacheMode | getInvalidateCacheMode () |
Returns the current cache invalidation mode. | |
uint32_t | getFrameCounter () const |
Returns the current frame counter. | |
void | resetFrameCounter (uint32_t count=0) |
Reset the frame counter. | |
virtual void | apply (SoNode *node) |
Initiates an action on the graph defined by a node. | |
virtual void | apply (SoPath *path) |
Initiates an action on the graph defined by a path. | |
virtual void | apply (const SoPathList &pathList, SbBool obeysRules=FALSE) |
Initiates an action on the graph defined by a list of paths. | |
void | shouldAutoCache (AutoCacheMode mode) |
Called by nodes to say that they should/shouldn't be auto-cached (pass TRUE if should, FALSE if shouldn't, don't call this method at all if the node doesn't care): | |
Public Member Functions inherited from SoAction | |
virtual | ~SoAction () |
Destructor. | |
virtual void | clearApplyResult () |
When applied, an action may reference nodes or create objects (e.g. | |
void | stopActionInBranch () |
This function stops the action in the current Scene Graph branch. | |
SbBool | getContinueActionInBranchFlag () const |
This function indicates if the action must stop in the current branch. | |
void | resetContinueActionInBranchFlag () |
This function resets the continue action flag. | |
void | useAlternateRep (const SbBool enable) |
Tell the action to use alternate representations during traversal when available. | |
SbBool | isUsingAlternateRep () const |
Returns TRUE if current action is using alternate representations. | |
void | setSceneManager (SoSceneManager *mgr) |
Set the scene manager associated with this action (if any ). | |
SoSceneManager * | getSceneManager () const |
Return the SoSceneManager associated with this action. | |
virtual void | forwardTraversal (SoNode *node) |
Traverse a node that is not part of the current scenegraph. | |
virtual void | forwardTraversal (SoPath *path) |
Traverse a path that is not part of the current scenegraph. | |
DistribMode | getDistribMode () const |
Returns the distribution mode of this action across a cluster (ScaleViz-Cluster only). | |
AppliedCode | getWhatAppliedTo () const |
Returns code indicating what action is being applied to. | |
SoNode * | getNodeAppliedTo () const |
Returns the node the action is being applied to. | |
SoPath * | getPathAppliedTo () const |
Returns the path the action is being applied to. | |
const SoPathList * | getPathListAppliedTo () const |
Returns the path list the action is being applied to. | |
const SoPathList * | getOriginalPathListAppliedTo () const |
Returns the original path list the action is being applied to. | |
SbBool | isLastPathListAppliedTo () const |
Returns TRUE if the current list is the last one from the original. | |
PathCode | getPathCode (int &numIndices, const int *&indices) |
Returns path code based on where current node (the node at the end of the current path) lies with respect to the path(s) the action is being applied to. | |
PathCode | getPathCodeMI (int &numIndices, const int *&indices, const int *&instanceIndices) |
Extender API: available to programmers who wish to extend the toolkit | |
void | traverse (SoNode *node) |
Does traversal of a graph rooted by a node. | |
SbBool | hasTerminated () const |
Returns TRUE if the traversal has reached a termination condition. | |
const SoPath * | getCurPath () |
Returns the path accumulated during traversal, i.e., the chain of nodes from the root of the traversed graph to the current node being traversed. | |
SoState * | getState () const |
Gets the state from the action. | |
void | setPipeId (int id) |
Sets pipe identifier in the range [1..N] associated to this render action while running a ScaleViz Multipipe configuration. | |
int | getPipeId () const |
Gets pipe identifier in the range [1..N] associated to this render action while running a ScaleViz Multipipe configuration. | |
bool | isBeingApplied () |
Returns TRUE if this action is currently being applied. | |
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 uint32_t | generateCacheContext () |
Generates and returns a new cache context id. | |
static bool | isUsedCacheContext (uint32_t context) |
Returns TRUE if the specified cache context id is currently used by any SoGLRenderAction. | |
static SbBool | isSortedLayersSupported (SoState *state=NULL) |
Indicates if SORTED_PIXEL transparency is supported by your graphics board on the current context. | |
Static Public Member Functions inherited from SoAction | |
static SoType | getClassTypeId () |
Returns the type identifier for this class. | |
static void | nullAction (SoAction *, SoNode *) |
Null action method that can be stored in lookup table when desired. | |
Static Public Member Functions inherited from SoTypedObject | |
static SoType | getClassTypeId () |
Returns the type identifier for this class. | |
Renders a scene graph using Open Inventor's Render Engine.
This class renders a scene graph using Open Inventor's render engine. This action traverses a scene graph and queues commands that allow the render engine to render the scene asynchronously. Note that (despite the "historical" name) this class is not dependent on any graphics library and does not directly provide rendering to a window.
The viewer classes, SoWin/SoXt/SoQtExaminerViewer etc, automatically create a render action for you and also expose most of the rendering options for convenience. See also the viewer component classes (SceneExaminer etc).
Traversal order
Nodes from the scene graph are traversed using depth-first traversal. However, traversal of some objects may be delayed, depending on transparency options.
A transparent object is an object:
Open Inventor automatically detects these cases.
The rendering order for transparent objects depends on the transparency "type" (transparency rendering method) assigned to each object. A transparency type may be set for the entire scene graph using the SoGLRenderAction or SoWinRenderArea method.
There are several special cases including:
The general rendering order is:
Scene graph traversal
All objects not in one of the following categories, specifically including transparent objects using the NO_SORT transparency type.
FastEdit KEEP_ZBUFFER objects
Objects under an SoSeparator node with fastEditing field set to KEEP_ZBUFFER.
Opaque delayed objects
Transparent delayed objects
Objects using transparency types OPAQUE_FIRST or SORTED_PIXEL. Note that by default the OpenGL depth buffer is not updated while rendering these objects.
Transparent sorted objects
Objects using transparency types SORTED_OBJECT These objects are sorted by the distance of their bounding box from the camera, then rendered in back-to-front order. Note that by default the OpenGL depth buffer is not updated while rendering these objects.
Annotation delayed objects
Objects under an SoAnnotation node.
FastEdit CLEAR_ZBUFFER objects
Objects under an SoSeparator node with fastEditing field set to CLEAR_ZBUFFER.
Elements
Sets: SoDecimationTypeElement, SoDecimationPercentageElement, SoUpdateAreaElement, SoRenderPassElement, SoViewportRegionElement, SoLogicalViewportElement
Notes & Limitations:
SoSeparator, SoWinRenderArea, SoRenderAreaCore
Definition at line 189 of file SoGLRenderAction.h.
typedef AbortCode SoGLRenderAction::SoGLRenderAbortCB(void *userData) |
Callback functions for render abort should be of this type.
This typedef is defined within the class, since it needs to refer to the AbortCode enumerated type.
Definition at line 398 of file SoGLRenderAction.h.
Possible return codes from a render abort callback.
Definition at line 371 of file SoGLRenderAction.h.
Two bits are stored.
Nodes that should be cached will set the DO_AUTO_CACHE bit, nodes that should NOT be cached will set the DONT_AUTO_CACHE bit. By default, DO_AUTO_CACHE is FALSE unless remote rendering is being done. DONT_AUTO_CACHE is FALSE by default. Separators will auto cache if DO_AUTO_CACHE is TRUE and DONT_AUTO_CACHE is FALSE, otherwise they won't auto-cache.
Enumerator | |
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DO_AUTO_CACHE | |
DONT_AUTO_CACHE |
Definition at line 789 of file SoGLRenderAction.h.
Fast edit traversal types.
See SoSeparator for additional info on fast editing.
In the following description, we will call FE the sub-scene graph allowing the fast editing feature,
and NFE the non-fast editing sub-scene graph and consider the following scene graph:
Separator { Separator { fastEditing # ( != DISABLE to activate ) Translation {} Cube{} } Separator { Translation {} Sphere{} Translation {} Sphere{} Translation {} Sphere{} } }
Enumerator | |
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DISABLE | Fast editing is disabled.
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EACH_FRAME | The fast edit feature is available. The image buffer (and possibly the depth buffer, depending on the value of the SoSeparator::fastEditing field) is saved each time the scene graph is redrawn. We recommend using the EACH_FRAME flag when manipulating a very large main scene graph. In this case, the time used for saving the buffer(s) is insignificant compared to the time to draw the scene. EACH_FRAME is recommended as well when the fast editing sub-scene graph is frequently modified: the user interactivity is better with the fast edit sub-scene graph even though the global scene frame rate may slow down. |
WHEN_NEEDED | The fast edit feature is available. No buffer save is made during ordinary scene rendering. When a change to the fast editing sub-scene graph occurs, the entire scene is first rendered and saved, and then the fast edit nodes are drawn. During the next rendering, only the fast edit nodes are drawn. So, using this flag implies you need one more full scene rendering before starting to move your fast edit sub-scene graph interactively. It would be better to use WHEN_NEEDED when the fast editing sub-scene graph changes very rarely. In this case you will be able to render the scene at full speed because extra time will not be spent saving the image buffer. |
Definition at line 327 of file SoGLRenderAction.h.
Invalidate cache mode.
Enumerator | |
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OFF | (Default) Render caches are handled normally. |
ONCE | Render caches are invalidated for each SoSeparator node before its children are traversed. The invalidate cache mode is automatically set to OFF after traversal. See setInvalidateCacheMode(). |
ALWAYS | Render caches are invalidated for each SoSeparator node before its children are traversed. |
Definition at line 401 of file SoGLRenderAction.h.
Transparency rendering algorithm.
See setTransparencyType() method.
Note: The transparency values deprecated since OpenInventor 9 have been removed. You can find below a correspondence table:
OIV 10 | OIV 9 |
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NO_SORT | NO_SORT NO_TRANSPARENCY SCREEN_DOOR ADD BLEND |
OPAQUE_FIRST | OPAQUE_FIRST DELAYED_ADD DELAYED_BLEND |
SORTED_OBJECT | SORTED_OBJECT SORTED_OBJECT_ADD SORTED_OBJECT_BLEND |
SORTED_PIXEL | SORTED_PIXEL SORTED_LAYERS_BLEND SORTED_PIXELS_BLEND DELAYED_SORTED_LAYERS_BLEND DELAYED_SORTED_PIXELS_BLEND SORTED_TRIANGLES_ADD SORTED_TRIANGLES_BLEND SORTED_OBJECT_TRIANGLES_ADD SORTED_OBJECT_TRIANGLES_BLEND |
Enumerator | |
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NO_TRANSPARENCY | |
NO_SORT | The simplest transparency mode. Shapes are rendered in the same order as they are traversed. Limitation: A shape will not be displayed if it is behind a semi-transparent shape that has been rendered before it. |
OPAQUE_FIRST | Same as NO_SORT, but the rendering of opaque objects is performed before the rendering of semi-transparent objects.
Notes & Limitations:
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SORTED_OBJECT | Same as OPAQUE_FIRST, but sorts semi-transparent objects by distances of bounding boxes from camera. Limitation : If the bounding box of a shape is ignored by setting its boundingBoxIgnoring field to true, the rendering won't be correct. |
SORTED_PIXEL | Same as OPAQUE_FIRST, but uses a fragment-level depth sorting technique during the rendering of semi-transparent objects.
Since Open Inventor 9.4, if the hardware supports the necessary OpenGL features, this transparency mode is implemented using a single-pass, order-independent fragment sorting (K-buffer or A-buffer) algorithm. The required OpenGL hardware features are: shader_image_load_store, shader_atomic_counters and shading_language_420pack. These features are standard in core OpenGL 4.2. Use SoGLExtension, if necessary, to check if they are supported. If the hardware does not support single-pass transparency, then a multi-pass "depth peeling" algorithm is used. The required OpenGL hardware features are: Multi-Texture, Texture Environment Combine, Depth texture, and Shadow . These features are standard starting with OpenGL 1.4. The method setSortedLayersNumPasses() allows you to set the number of rendering passes for more correct transparency. Usually, four passes gives good results. If the graphics board does not support multi-pass transparency, SORTED_OBJECT is used. Note: If the application uses fragment sorting transparency and specifies a custom fragment shader, the application shader must call an Open Inventor GLSL method instead of setting gl_FragColor directly. In the SDK installation, see shaders/include/Inventor/oivDepthPeeling_frag.h Limitations:
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Definition at line 228 of file SoGLRenderAction.h.
SoGLRenderAction::SoGLRenderAction | ( | const SbViewportRegion & | viewportRegion | ) |
Constructor.
The parameter defines the viewport region into which rendering will take place.
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virtual |
Initiates an action on the graph defined by a list of paths.
TRUE can be passed for the obeysRules flag if the given path list has the following 4 properties:
These rules will be obeyed by path lists returned by picking and by searches for non-group nodes.
Reimplemented from SoAction.
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Initiates an action on the graph defined by a node.
Warning: Most actions call ref() on the node before traversing the scene graph, then call unref() after traversal. If the node's reference count was zero (the default), the call to apply() will cause it to be destroyed.
Reimplemented from SoAction.
Reimplemented in SoBoxHighlightRenderAction, and SoHighlightRenderAction.
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Initiates an action on the graph defined by a path.
Warning: Most actions call ref() on the path before traversing the scene graph, then call unref() after traversal. If the path's reference count was zero (the default), the call to apply() will cause it to be destroyed.
Reimplemented from SoAction.
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static |
Generates and returns a new cache context id.
The returned cache context id can then be used to pass to the setCacheContext() method call.
uint32_t SoGLRenderAction::getCacheContext | ( | ) | const |
Returns the OpenGL cache context id for this action.
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Returns the type identifier for this class.
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Gets decimation percentage, the value should be a number between 0.0 and 1.0.
Definition at line 733 of file SoGLRenderAction.h.
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Gets decimation type.
Definition at line 727 of file SoGLRenderAction.h.
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Returns fast editing save policy used when rendering.
Definition at line 535 of file SoGLRenderAction.h.
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Returns the current frame counter.
The frame counter starts at zero and is automatically incremented each time the action is applied. The frame counter will have the same value throughout a single apply, even if there are multiple render passes, delayed rendering, etc.
Definition at line 764 of file SoGLRenderAction.h.
InvalidateCacheMode SoGLRenderAction::getInvalidateCacheMode | ( | ) |
Returns the current cache invalidation mode.
const SbViewportRegion & SoGLRenderAction::getLogicalViewportRegion | ( | ) | const |
Returns current logical viewport region.
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Gets number of rendering passes for multipass rendering.
Definition at line 576 of file SoGLRenderAction.h.
SbBool SoGLRenderAction::getRenderingIsRemote | ( | ) | const |
Returns TRUE if remote rendering is being done.
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Returns the number of rendering passes used when transparency type is SORTED_PIXEL.
Definition at line 661 of file SoGLRenderAction.h.
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Returns transparency quality level to use when rendering.
Definition at line 518 of file SoGLRenderAction.h.
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Returns the type identifier for this specific instance.
Implements SoTypedObject.
Reimplemented in SoBoxHighlightRenderAction, SoColorHighlightRenderAction, SoHaloHighlightRenderAction, SoHighlightRenderAction, and SoLineHighlightRenderAction.
Returns the current update area.
See setUpdateArea() for details.
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Returns viewport region to use for rendering.
Definition at line 440 of file SoGLRenderAction.h.
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Invalidate the state, forcing it to be recreated at the next apply.
Reimplemented from SoAction.
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Returns whether the OpenGL alpha test is enabled for rendering.
Definition at line 692 of file SoGLRenderAction.h.
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Returns a flag indicating whether intermediate results are displayed after each antialiasing pass for progressive improvement.
The default value can be set using the environment variable OIV_ANTIALIAS_PASS_UPDATE.
Definition at line 591 of file SoGLRenderAction.h.
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Returns smoothing flag.
Definition at line 554 of file SoGLRenderAction.h.
Indicates if SORTED_PIXEL transparency is supported by your graphics board on the current context.
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Returns TRUE if the specified cache context id is currently used by any SoGLRenderAction.
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Reset the frame counter.
Do not call this method during a traversal.
Definition at line 770 of file SoGLRenderAction.h.
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Sets callback to call during rendering to test for an abort condition.
It will be called for each node that is traversed. This allows applications to terminate rendering prematurely if some condition occurs. The callback function should return one of the AbortCode codes to indicate whether traversal should continue. Use of the various codes in a callback can allow applications to modify Open Inventor's default order of rendering objects in a scene graph.
Definition at line 476 of file SoGLRenderAction.h.
void SoGLRenderAction::setAlphaTest | ( | SbBool | flag | ) |
Enable or disable the OpenGL alpha test for rendering.
Default is FALSE (alpha test disabled) and the default test is "not equal to zero". The alpha test operates on all pixel writes, including those resulting from the scan conversion of points, lines, polygons, and bitmaps, and from pixel draw and copy operations. It does not affect screen clear operations.
For example, if rendering with textures containing "binary" alpha values (0 or 1), the alpha test may be faster than blended transparency and does not require the use of delayed rendering transparency types.
The default value can be set using the environment variable OIV_ALPHA_TEST (0 = FALSE, 1 = TRUE).
void SoGLRenderAction::setCacheContext | ( | uint32_t | context | ) |
Sets the OpenGL cache context.
A cache context is just an integer identifying when OpenGL display lists (which are used for render caching) can be shared between render actions; for example, see the documentation on GLX contexts for information on when OpenGL display lists can be shared between GLX windows. See generateCacheContext(). Note: The value 0xFFFFFFFF (~0) is reserved to represent an undefined id.
void SoGLRenderAction::setDecimationValue | ( | SoDecimationTypeElement::Type | type, |
float | percentage = 1.0 |
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) |
Sets decimation percentage, the value should be a number between 0.0 and 1.0 Useful for reducing the number of triangles rendered in the scene.
void SoGLRenderAction::setFastEditSavePolicy | ( | FastEditSavePolicy | policy, |
SbBool | fastEditDelayedObjects = FALSE |
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) |
Sets fast editing save policy to use when rendering.
The default is WHEN_NEEDED. Valid values are DISABLE, EACH_FRAME, and WHEN_NEEDED. See SoSeparator.
If fastEditDelayedObjects is set to TRUE, delayed objects won't be redrawn when editing the scene graph. It means that the composition between delayed transparent objects and the fast edit scene graph won't be correct, but rendering will be much faster if there are a lot of transparent objects.
void SoGLRenderAction::setInvalidateCacheMode | ( | InvalidateCacheMode | icm | ) |
Enables or disables the invalidation of render caches.
This method is useful to force all nodes to be visited during render traversal.
void SoGLRenderAction::setLogicalViewportRegion | ( | const SbViewportRegion & | newLogicalRegion | ) |
Sets current logical viewport region to use for rendering.
Setting an empty viewport region (0,0) unsets the logical viewport.
void SoGLRenderAction::setNumPasses | ( | int | num | ) |
Sets number of rendering passes for multipass antialiasing.
The default is 1. Specifying more than one pass will result in antialiasing of the rendered scene, using OpenGL's accumulation buffer. (Camera nodes typically move their viewpoints a little bit for each pass to achieve the antialiasing.) Each additional pass provides better antialiasing, but requires more rendering time.
The default value can be set using the environment variable OIV_NUM_RENDER_PASSES.
NOTE: Multipass antialiasing can have very poor performance for large scenes. Full-scene antialiasing (multi-sample) is strongly recommended when the hardware supports it. See SoSceneManager and SoFullSceneAntialiasing.
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Sets a callback function to invoke between passes when antialiasing.
Passing NULL (which is the default state) will cause a clear of the color and depth buffers to be performed.
Definition at line 598 of file SoGLRenderAction.h.
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Sets a flag indicating whether intermediate results are displayed after each antialiasing pass for progressive improvement (default is FALSE).
Definition at line 582 of file SoGLRenderAction.h.
void SoGLRenderAction::setRenderingIsRemote | ( | SbBool | flag | ) |
Sets whether or not "remote" rendering is done.
Inventor's auto-render-caching algorithm will choose to cache more often when rendering is remote (the assumption being that performance will be better with display lists stored on the remote machine). By default, it is assumed rendering is NOT remote.
SoDEPRECATED void SoGLRenderAction::setSmoothing | ( | SbBool | smooth | ) |
Sets smoothing flag.
When on, smoothing uses OpenGL's line- and point-smoothing features to provide cheap antialiasing of lines and points. The default is FALSE.
The default value can be set using the environment variable OIV_GL_SMOOTHING (0 = FALSE, 1 = TRUE).
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Sets the number of rendering passes used when transparency type is SORTED_PIXEL.
Default is 4.
Note: Since Open Inventor 9.4, if the hardware supports the necessary OpenGL features, these transparency modes are implemented using a single-pass, order-independent fragment sorting (A-buffer) algorithm. Therefore the value of this field is not used except in two special cases:
Use more passes for more correct transparency. Usually four passes (which is the default value) gives good results. For example, the number of passes needed for rendering an opaque sphere behind two cubes is the number of planes separating the sphere from the viewer. So, when backface culling is enabled, 2 faces separate the sphere from the viewer: the front face of the first cube and the front face of the second cube. The number of passes needed in this case is 2.
The default value for this field can be set using the environment variable OIV_NUM_SORTED_LAYERS_PASSES.
Definition at line 652 of file SoGLRenderAction.h.
void SoGLRenderAction::setTransparencyType | ( | TransparencyType | type | ) |
Sets global transparency algorithm to use when rendering.
Use enum TransparencyType. The default is NO_SORT, but SORTED_PIXEL is recommended for most cases. See also getTransparencyType(). Transparency handling can be completely disabled by setting NO_SORT.
The global transparency algorithm can also be set using a method in the viewer class (e.g. SoWinRenderArea::setTransparencyType()).
The default value for this field can be set using the environment variable OIV_TRANSPARENCY_TYPE.
See SoGLRenderAction::TransparencyType for more discussion about transparency.
Notes:
Sets the current update area, which is the rectangular area of the viewport region that will actually be rendered into.
This can be used for partial updates in applications that can manage them. The update area is specified in normalized viewport coordinates, where (0,0) is the lower left corner of the viewport and (1,1) is the upper right corner. The area is specified or returned as an origin and a size.
void SoGLRenderAction::setViewportRegion | ( | const SbViewportRegion & | newRegion | ) |
Changes viewport region to use for rendering.
void SoGLRenderAction::shouldAutoCache | ( | AutoCacheMode | mode | ) |
Called by nodes to say that they should/shouldn't be auto-cached (pass TRUE if should, FALSE if shouldn't, don't call this method at all if the node doesn't care):