SoExtTexture2 Class |
Extended texture mapping node.
Namespace: OIV.Inventor.Nodes
The SoExtTexture2 type exposes the following members.
Name | Description | |
---|---|---|
SoExtTexture2 | Creates a texture node with default settings. |
Name | Description | |
---|---|---|
AffectsState | Returns true if a node has an effect on the state during traversal. | |
AllowPrequalifyFile | If true, allows the PrequalifyFile delegateto be called. | |
Callback | (Inherited from SoTexture.) | |
Copy | Calls Copy(false). (Inherited from SoNode.) | |
Copy(Boolean) | Creates and returns an exact copy of the node. | |
CopyFieldValues(SoFieldContainer) | Calls CopyFieldValues(fc, false). (Inherited from SoFieldContainer.) | |
CopyFieldValues(SoFieldContainer, Boolean) | Copies the contents of fc's fields into this object's fields. | |
Dispose |
Releases all resources used by SoDisposable.
(Inherited from SoDisposable.) | |
Distribute | (Inherited from SoNode.) | |
DoAction | (Overrides SoTextureDoAction(SoAction).) | |
EnableNotify | Notification at this Field Container is enabled (if flag == true) or disabled (if flag == false). | |
Equals | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) | |
FieldsAreEqual | Returns true if this object's fields are exactly equal to fc's fields. | |
Get | Returns the values of the fields of this object in the Open Inventor ASCII file format in the given string. | |
GetAllFields | Returns a list of fields, including the eventIn's and eventOut's. | |
GetAlternateRep | This method is called by actions to allow the node to provide an "alternate representation" when appropriate (typically depending on the action type). | |
GetBitmapFileType | Gets the texture file format. | |
GetBoundingBox | (Inherited from SoNode.) | |
GetEventIn | Returns a the eventIn with the given name. | |
GetEventOut | Returns the eventOut with the given name. | |
GetField | Returns a the field of this object whose name is fieldName. | |
GetFieldName | Returns the name of the given field in the fieldName argument. | |
GetFields | Appends references to all of this object's fields to resultList, and returns the number of fields appended. | |
GetGlobalMemoryUsed | Return the current system memory used by all texture images. | |
GetHashCode |
Overrides GetHashCode().
(Inherited from SoNetBase.) | |
GetImageSize | Returns the size and the number of components in the image. | |
GetMatrix | (Inherited from SoNode.) | |
GetMemorySpace | Gets the system memory space allowed for the texture images. | |
GetName | Returns the name of an instance. | |
GetPrimitiveCount | (Inherited from SoNode.) | |
GetRenderEngineMode | Returns the supported Render engine mode. | |
GetRenderUnitID | (Inherited from SoNode.) | |
GetStringName | (Inherited from SoBase.) | |
GetType | Gets the Type of the current instance. (Inherited from Object.) | |
GLRender | (Overrides SoTextureGLRender(SoGLRenderAction).) | |
GLRenderBelowPath | (Inherited from SoNode.) | |
GLRenderInPath | (Inherited from SoNode.) | |
GLRenderOffPath | (Inherited from SoNode.) | |
GrabEventsCleanup | (Inherited from SoNode.) | |
GrabEventsSetup | (Inherited from SoNode.) | |
HandleEvent | (Inherited from SoNode.) | |
HasDefaultValues | Returns true if all of the object's fields have their default values. | |
IsBoundingBoxIgnoring | 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. | |
IsNotifyEnabled | Notification is the process of telling interested objects that this object has changed. | |
IsOverride | Returns the state of the override field. | |
IsSynchronizable | Gets the ScaleViz synchronizable state of this object. | |
LoadTexture | Loads the texture if the loading mode is set to MANUAL. | |
Pick | (Inherited from SoNode.) | |
RayPick | (Inherited from SoNode.) | |
Search | (Inherited from SoNode.) | |
Set | 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. | |
SetBitmapFileType | Sets the texture file format. | |
SetMemorySpace | Sets the system memory space allowed for the texture images. | |
SetName | (Inherited from SoBase.) | |
SetOverride | Set the state of the override field. | |
SetSynchronizable | Sets this to be a ScaleViz synchronizable object. | |
SetToDefaults | Sets all fields in this object to their default values. | |
ToString |
Converts this SoBase structure to a human readable string.
(Inherited from SoBase.) | |
Touch | Marks an instance as modified, simulating a change to it. | |
UseTexturePalette | If true, uses a 256-color-indexed palette. | |
Write | (Overrides SoNodeWrite(SoWriteAction).) |
Name | Description | |
---|---|---|
blendColor | Color used for BLEND model. | |
borderColor | Defines border color used for border texture filtering. | |
enableBorder | Enables borders for textures. | |
enableCompressedTexture | Enables storage of textures on the graphics board in compressed form. | |
filename | Names file from which to read texture image. | |
internalFormat | Internal format for texture storage. | |
IsDisposable | ISafeDisposable interface implementation.
(Inherited from SoDisposable.) | |
loadingMode | Specifies the loading mode. | |
loadingStatus | Tells if the texture is loaded or not (not necessarily displayed) | |
loadingThreadPriority | Specifies the priority of the texture loading thread when activated (syncMode = ASYNCHRONOUS). | |
magFilter | Specifies the OpenGL magFilter. | |
maxAnisotropy | Specifies on a per-texture object basis, the maximum degree of anisotropy to account for in texture filtering. | |
minFilter | Specifies the OpenGL minFilter. | |
model | Specifies how to map texture onto surface. | |
PrequalifyFileCallback | This callback is called by OIV.Inventor.Nodes.SoExtTexture2 nodes just before opening a file with the proposed path. | |
syncMode | Specifies the synchronous/asynchronous mode. | |
UserData |
Gets or sets the user data to be contained by the field container.
(Inherited from SoFieldContainer.) | |
wrapS | Indicates what to do when texture coordinates in the S (horizontal) direction lie outside the range 0-1. | |
wrapT | Indicates what to do when texture coordinates in the T (vertical) direction lie outside the range 0-1. |
Name | Description | |
---|---|---|
LoadFinish | ||
LoadStart | ||
Unload |
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 |
wrapS | REPEAT |
wrapT | REPEAT |
model | MODULATE |
blendColor | 0 0 0 |
loadingStatus | false |
syncMode | SYNCHRONOUS |
loadingMode | AUTO |
loadingThreadPriorty | 1 |
enableBorder | false |
borderColor | 0 0 0 0 |
maxAnisotropy | 1.0 |
minFilter | AUTO |
magFilter | AUTO |
useAutoMipmap | false |
internalFormat | AUTO_INTERNAL_FORMAT |
OIV.Inventor.Actions.SoGLRenderAction, OIV.Inventor.Actions.SoCallbackAction Sets current texture in state. Sets: OIV.Inventor.Elements.SoTextureImageElement