com.openinventor.inventor.actions

Class SoGetPrimitiveCountAction

java.lang.Object

com.openinventor.inventor.Inventor

com.openinventor.inventor.actions.SoAction

com.openinventor.inventor.actions.SoGetPrimitiveCountAction

public class SoGetPrimitiveCountAction
extends SoAction

Counts number of primitives in scene. This class counts the number of rendering primitives a scene would use to render. This can be used as an approximation of how long the scene would take to render. The primitives are divided into five categories: triangles, lines, points, text objects, and images.

After applying the action to a path or scene graph, the results can be obtained with the functions getTriangleCount(), getLineCount(), etc. The decimation value can be altered before applying, which is useful for finding the minimum and maximum number of primitives the scene requires (use LOWEST and HIGHEST).

3D Text, such as SoText3 can be counted as either text or triangles. The function setCount3DTextAsTriangles() will determine how these objects are counted.

Polygonal geometry nodes, for example SoIndexedFaceSet, are always counted as triangles even if the draw style (SoDrawStyle) is set to LINES or POINTS.

Some shapes, such as trimmed NURBS surfaces, can answer quicker if they are allowed to approximate how many primitives they will use instead of calculating an exact answer. If an exact answer is not required, passing true to setCanApproximate() will speed the action.

Elements
Sets: SoDecimationTypeElement, SoDecimationPercentageElement

EXAMPLE

 // Count triangles in scene graph
 SoGetPrimitiveCountAction gpca = new SoGetPrimitiveCountAction();
 gpca.apply( root );
 int numTris = gpca.getTriangleCount();

See also:

SoAction, SoLevelOfSimplification, SoOctreeOrdering, SoRenderList, SoValueOrdering

Nested Class Summary

Nested classes/interfaces inherited from class com.openinventor.inventor.actions.SoAction

SoAction.AppliedCodes, SoAction.DistribModes, SoAction.PathCodes, SoAction.PathIndices

Nested classes/interfaces inherited from class com.openinventor.inventor.Inventor

Inventor.ConstructorCommand

Field Summary

Fields inherited from class com.openinventor.inventor.Inventor

VERBOSE_LEVEL, ZeroHandle

Constructor Summary

Constructors

Constructor and Description
SoGetPrimitiveCountAction() Constructor.

Method Summary

Modifier and Type	Method and Description
void	addNumImage(int num)
void	addNumLines(int num)
void	addNumPoints(int num)
void	addNumText(int num)
void	addNumTriangles(int num)
boolean	canApproximateCount() Returns whether shapes are allowed to approximate their count.
boolean	containsNonTriangleShapes() Returns true if scene contains some primitives that are not triangles.
boolean	containsNoPrimitives() Returns true if scene contains no primitives of any kind.
static void	enableElement(java.lang.Class<? extends Inventor> t, int stkIndex)
float	getDecimationPercentage() Gets decimation percentage.
SoDecimationTypeElement.Types	getDecimationType() Gets decimation type.
int	getImageCount() Returns counted number of primitives (images).
int	getLineCount() Returns counted number of primitives (lines).
int	getPointCount() Returns counted number of primitives (points).
int	getTextCount() Returns counted number of primitives (text).
int	getTriangleCount() Returns counted number of primitives (triangles).
void	incNumImage()
void	incNumLines()
void	incNumPoints()
void	incNumText()
void	incNumTriangles()
boolean	is3DTextCountedAsTriangles() Returns how SoText3 should be counted: as a triangle-based shape (true) or as a text-based shape (false).
void	setCanApproximate(boolean onOff) Some shapes may be able to guess an approximate number of triangles without actually counting.
void	setCount3DTextAsTriangles(boolean treatAsTris) SoText3 can be counted two ways: as a triangle-based shape or as a text-based shape.
void	setDecimationValue(SoDecimationTypeElement.Types type) Calls setDecimationValue(type, (float)1.0).
void	setDecimationValue(SoDecimationTypeElement.Types type, float percentage) Sets decimation type and percentage.

Methods inherited from class com.openinventor.inventor.actions.SoAction

apply, apply, clearApplyResult, forwardTraversal, getContinueActionInBranchFlag, getCurPath, getDistribMode, getNodeAppliedTo, getOriginalPathListAppliedTo, getPathAppliedTo, getPathCode, getPathListAppliedTo, getPipeId, getSceneManager, getState, getWhatAppliedTo, hasTerminated, invalidateState, isBeingApplied, isLastPathListAppliedTo, isUsingAlternateRep, nullAction, postDelayedTraversal, preDelayedTraversal, resetContinueActionInBranchFlag, setPipeId, setSceneManager, setUpState, stopActionInBranch, traverse, useAlternateRep

Methods inherited from class com.openinventor.inventor.Inventor

dispose, getNativeResourceHandle

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SoGetPrimitiveCountAction

public SoGetPrimitiveCountAction()

Constructor.

Method Detail

setDecimationValue

public void setDecimationValue(SoDecimationTypeElement.Types type)

Calls setDecimationValue(type, (float)1.0).

getLineCount

public int getLineCount()

Returns counted number of primitives (lines).

incNumPoints

public void incNumPoints()

incNumLines

public void incNumLines()

incNumTriangles

public void incNumTriangles()

getPointCount

public int getPointCount()

Returns counted number of primitives (points).

incNumImage

public void incNumImage()

setCanApproximate

public void setCanApproximate(boolean onOff)

Some shapes may be able to guess an approximate number of triangles without actually counting. In the interests of speed, and depending on how the results are used, a flag is available to allow shapes to approximate their count. The default is false.

getTriangleCount

public int getTriangleCount()

Returns counted number of primitives (triangles).

incNumText

public void incNumText()

getDecimationType

public SoDecimationTypeElement.Types getDecimationType()

Gets decimation type.

enableElement

public static void enableElement(java.lang.Class<? extends Inventor> t,
                                 int stkIndex)

setDecimationValue

public void setDecimationValue(SoDecimationTypeElement.Types type,
                               float percentage)

Sets decimation type and percentage. Percentage should be a number between 0.0 and 1.0 (1.0 is full complexity).

Type is one of:

SoDecimationTypeElement.LOWEST
Lowest complexity possible for scene.

SoDecimationTypeElement.HIGHEST
Highest complexity possible for scene.

SoDecimationTypeElement.AUTOMATIC
Scene uses decimation percentage; LODs calculate range value and then adjust them with percentage.

SoDecimationTypeElement.PERCENTAGE
Scene uses decimation percentage; LODs use child based solely on decimation without looking at camera position.

addNumTriangles

public void addNumTriangles(int num)

canApproximateCount

public boolean canApproximateCount()

Returns whether shapes are allowed to approximate their count.

is3DTextCountedAsTriangles

public boolean is3DTextCountedAsTriangles()

Returns how SoText3 should be counted: as a triangle-based shape (true) or as a text-based shape (false).

getDecimationPercentage

public float getDecimationPercentage()

Gets decimation percentage.

setCount3DTextAsTriangles

public void setCount3DTextAsTriangles(boolean treatAsTris)

SoText3 can be counted two ways: as a triangle-based shape or as a text-based shape. This routine specifies how SoText3 should be counted. The default is true (SoText3 adds to the triangle count, not the text count).

getImageCount

public int getImageCount()

Returns counted number of primitives (images).

addNumText

public void addNumText(int num)

getTextCount

public int getTextCount()

Returns counted number of primitives (text).

addNumImage

public void addNumImage(int num)

containsNonTriangleShapes

public boolean containsNonTriangleShapes()

Returns true if scene contains some primitives that are not triangles.

addNumLines

public void addNumLines(int num)

containsNoPrimitives

public boolean containsNoPrimitives()

Returns true if scene contains no primitives of any kind.

addNumPoints

public void addNumPoints(int num)