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SoExtTexture2 Class

Extended texture mapping node.

Inheritance Hierarchy

Namespace: OIV.Inventor.Nodes
Assembly: OIV.Inventor (in OIV.Inventor.dll) Version: 2023.2.0.0 (2023.2.0)
public class SoExtTexture2 : SoTexture

The SoExtTexture2 type exposes the following members.

Public methodSoExtTexture2

Creates a texture node with default settings.

Public methodAffectsState

Returns true if a node has an effect on the state during traversal.

(Inherited from SoNode.)
Public methodAllowPrequalifyFile

If true, allows the PrequalifyFile delegateto be called.

Public methodCallback
(Inherited from SoTexture.)
Public methodCopy
Calls Copy(false).
(Inherited from SoNode.)
Public methodCopy(Boolean)

Creates and returns an exact copy of the node.

(Inherited from SoNode.)
Public methodCopyFieldValues(SoFieldContainer)
Calls CopyFieldValues(fc, false).
(Inherited from SoFieldContainer.)
Public methodCopyFieldValues(SoFieldContainer, Boolean)

Copies the contents of fc's fields into this object's fields.

(Inherited from SoFieldContainer.)
Public methodDispose
Releases all resources used by SoDisposable.
(Inherited from SoDisposable.)
Public methodDistribute
(Inherited from SoNode.)
Public methodDoAction
Public methodEnableNotify

Notification at this Field Container is enabled (if flag == true) or disabled (if flag == false).

(Inherited from SoFieldContainer.)
Public methodEquals
Determines whether the specified Object is equal to the current Object.
(Inherited from Object.)
Public methodFieldsAreEqual

Returns true if this object's fields are exactly equal to fc's fields.

(Inherited from SoFieldContainer.)
Public methodGet

Returns the values of the fields of this object in the Open Inventor ASCII file format in the given string.

(Inherited from SoFieldContainer.)
Public methodGetAllFields

Returns a list of fields, including the eventIn's and eventOut's.

(Inherited from SoFieldContainer.)
Public methodGetAlternateRep

This method is called by actions to allow the node to provide an "alternate representation" when appropriate (typically depending on the action type).

(Inherited from SoNode.)
Public methodGetBitmapFileType

Gets the texture file format.

(Inherited from SoTexture.)
Public methodGetBoundingBox
(Inherited from SoNode.)
Public methodGetEventIn

Returns a the eventIn with the given name.

(Inherited from SoFieldContainer.)
Public methodGetEventOut

Returns the eventOut with the given name.

(Inherited from SoFieldContainer.)
Public methodGetField

Returns a the field of this object whose name is fieldName.

(Inherited from SoFieldContainer.)
Public methodGetFieldName

Returns the name of the given field in the fieldName argument.

(Inherited from SoFieldContainer.)
Public methodGetFields

Appends references to all of this object's fields to resultList, and returns the number of fields appended.

(Inherited from SoFieldContainer.)
Public methodStatic memberGetGlobalMemoryUsed

Return the current system memory used by all texture images.

Public methodGetHashCode
Overrides GetHashCode().
(Inherited from SoNetBase.)
Public methodGetImageSize

Returns the size and the number of components in the image.

Public methodGetMatrix
(Inherited from SoNode.)
Public methodStatic memberGetMemorySpace

Gets the system memory space allowed for the texture images.

Public methodGetName

Returns the name of an instance.

(Inherited from SoBase.)
Public methodGetPrimitiveCount
(Inherited from SoNode.)
Public methodGetRenderEngineMode

Returns the supported Render engine mode.

(Inherited from SoNode.)
Public methodGetRenderUnitID
(Inherited from SoNode.)
Public methodGetStringName (Inherited from SoBase.)
Public methodGetType
Gets the Type of the current instance.
(Inherited from Object.)
Public methodGLRender
Public methodGLRenderBelowPath
(Inherited from SoNode.)
Public methodGLRenderInPath
(Inherited from SoNode.)
Public methodGLRenderOffPath
(Inherited from SoNode.)
Public methodGrabEventsCleanup
(Inherited from SoNode.)
Public methodGrabEventsSetup
(Inherited from SoNode.)
Public methodHandleEvent
(Inherited from SoNode.)
Public methodHasDefaultValues

Returns true if all of the object's fields have their default values.

(Inherited from SoFieldContainer.)
Public methodIsBoundingBoxIgnoring

This method is used by getBoundingBox action traversal to know if the current node must be traversed or not, ie the bounding should be ignored.

(Inherited from SoNode.)
Public methodIsNotifyEnabled

Notification is the process of telling interested objects that this object has changed.

(Inherited from SoFieldContainer.)
Public methodIsOverride

Returns the state of the override field.

(Inherited from SoTexture.)
Public methodIsSynchronizable

Gets the ScaleViz synchronizable state of this object.

(Inherited from SoBase.)
Public methodLoadTexture

Loads the texture if the loading mode is set to MANUAL.

Public methodPick
(Inherited from SoNode.)
Public methodRayPick
(Inherited from SoNode.)
Public methodSearch
(Inherited from SoNode.)
Public methodSet

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.

(Inherited from SoFieldContainer.)
Public methodSetBitmapFileType

Sets the texture file format.

(Inherited from SoTexture.)
Public methodStatic memberSetMemorySpace

Sets the system memory space allowed for the texture images.

Public methodSetName (Inherited from SoBase.)
Public methodSetOverride

Set the state of the override field.

(Inherited from SoTexture.)
Public methodSetSynchronizable

Sets this to be a ScaleViz synchronizable object.

(Inherited from SoBase.)
Public methodSetToDefaults

Sets all fields in this object to their default values.

(Inherited from SoFieldContainer.)
Public methodToString
Converts this SoBase structure to a human readable string.
(Inherited from SoBase.)
Public methodTouch

Marks an instance as modified, simulating a change to it.

(Inherited from SoNode.)
Public methodStatic memberUseTexturePalette

If true, uses a 256-color-indexed palette.

Public methodWrite
Public propertyblendColor

Color used for BLEND model.

(Inherited from SoTexture.)
Public propertyborderColor

Defines border color used for border texture filtering.

(Inherited from SoTexture.)
Public propertyenableBorder

Enables borders for textures.

(Inherited from SoTexture.)
Public propertyenableCompressedTexture

Enables storage of textures on the graphics board in compressed form.

(Inherited from SoTexture.)
Public propertyfilename

Names file from which to read texture image.

Public propertyinternalFormat

Internal format for texture storage.

(Inherited from SoTexture.)
Public propertyIsDisposable
ISafeDisposable interface implementation.
(Inherited from SoDisposable.)
Public propertyloadingMode

Specifies the loading mode.

Public propertyloadingStatus

Tells if the texture is loaded or not (not necessarily displayed)

Public propertyloadingThreadPriority

Specifies the priority of the texture loading thread when activated (syncMode = ASYNCHRONOUS).

Public propertymagFilter

Specifies the OpenGL magFilter.

(Inherited from SoTexture.)
Public propertymaxAnisotropy

Specifies on a per-texture object basis, the maximum degree of anisotropy to account for in texture filtering.

(Inherited from SoTexture.)
Public propertyminFilter

Specifies the OpenGL minFilter.

(Inherited from SoTexture.)
Public propertymodel

Specifies how to map texture onto surface.

(Inherited from SoTexture.)
Public propertyStatic memberPrequalifyFileCallback

This callback is called by OIV.Inventor.Nodes.SoExtTexture2 nodes just before opening a file with the proposed path.

Public propertysyncMode

Specifies the synchronous/asynchronous mode.

Public propertyUserData
Gets or sets the user data to be contained by the field container.
(Inherited from SoFieldContainer.)
Public propertywrapS

Indicates what to do when texture coordinates in the S (horizontal) direction lie outside the range 0-1.

(Inherited from SoTexture.)
Public propertywrapT

Indicates what to do when texture coordinates in the T (vertical) direction lie outside the range 0-1.

Public eventLoadFinish
Public eventLoadStart
Public eventUnload

This property node defines a texture map and parameters for that map. This map is used to apply texture to subsequent shapes as they are rendered.

The node is similar to OIV.Inventor.Nodes.SoTexture2, but differs in the following significant ways:

1. It has no image field.

2. It doesn't load the texture image into system memory until the node is traversed. Depending on the scene graph, this may significantly reduce the use of system memory, e.g., if the scene has lots of LODs containing textures. On the other hand, when the scene graph is first traversed there may be a small delay while the textures are being loaded.

3. It has additional features (e.g., support for OpenGL paletted textures) for reducing the use of texture memory.

The texture is read from the file specified by the OIV.Inventor.Nodes.SoExtTexture2.filename field. There is no image field created. Data is sent directly to OpenGL.

The maximum system memory allowed for all OIV.Inventor.Nodes.SoExtTexture2 nodes (in total) can be set using OIV.Inventor.Nodes.SoExtTexture2.SetMemorySpace(System.Double).

If the memory allowed for texture images (OIV.Inventor.Nodes.SoExtTexture2.SetMemorySpace(System.Double)) would be exceeded by loading a new image, one or more existing images will be deleted from system memory. In most cases OpenGL texture objects will already have been created for the deleted images (i.e. OpenGL has a copy of the images), so this does not affect rendering.

If it is necessary to recreate an OpenGL texture object and the required texture image has been deleted from system memory, the node will automatically re-read the image file. For this reason, applications should be careful not to remove image files that might be needed during program execution.

To reduce the use of texture memory (by approximately a factor of 4), use the OIV.Inventor.Nodes.SoExtTexture2.UseTexturePalette(System.Boolean) method to request the image be converted to a 256-color paletted image. This feature is available only if the driver supports the GL_EXT_paletted_texture or GL_EXT_texture_color_table extension.

If the texture image's width or height is not a power of 2, and the Non Power Of Two (NPOT) extension is available on your graphics board, by default Open Inventor will send the image to OpenGL without modification. However, if the texture image's width or height is not a power of 2 (and the Non Power Of Two (NPOT) extension is not available on your graphics board), or the image's width or height is greater than the maximum supported by OpenGL, then the image will be automatically scaled up or down to the nearest power of 2 or the maximum texture size. For maximum speed, point-sampling is used to do the scaling. If you want higher quality scaling, pre-filter your images to a power of 2 smaller than the maximum texture size. Use the OpenGL glGetIntegerv(GL_MAX_TEXTURE_SIZE...) call to determine the maximum texture dimension for a specific OpenGL implementation. Setting the environment variable OIV_USE_NPOT to 0 will force the image to be rescaled (when necessary) even if the NPOT extension is available.

The quality of the texturing is affected by the textureQuality field of the OIV.Inventor.Nodes.SoComplexity node. The textureQuality field affects what kind of filtering is done to the texture when it must be minified or magnified. The mapping of a particular texture quality value to a particular OpenGL filtering technique is platform dependent, and varies based on the texturing performance. If mipmap filtering is required, mipmaps are automatically created using a simple box filter.

Performance Note: Automatic scaling of texture images to a power of 2 is a very convenient feature for prototyping, but it does take additional time the first time the texture node is traversed for rendering. For large images, or a large number of images, this can make the application seem slow while starting up or loading a new data file. Avoid this effect by either pre-scaling the image or by storing it as a sub-image in a "power of 2" image (then provide explicit texture coordinates such that only the sub-image is used).


ExtTexture2 {
filename ""
enableCompressedTexture false
blendColor 0 0 0
loadingStatus false
loadingMode AUTO
loadingThreadPriorty 1
enableBorder false
borderColor 0 0 0 0
maxAnisotropy 1.0
minFilter AUTO
magFilter AUTO
useAutoMipmap false


OIV.Inventor.Actions.SoGLRenderAction, OIV.Inventor.Actions.SoCallbackAction Sets current texture in state. Sets: OIV.Inventor.Elements.SoTextureImageElement

See Also