SoTextureEnabledElement Class Reference
[Elements]
Enables/disables textures. More...
#include <Inventor/elements/SoTextureEnabledElement.h>
Public Member Functions | |
| virtual void | push (SoState *state) |
| virtual void | pop (SoState *state, const SoElement *prevTopElement) |
Static Public Member Functions | |
| static SoType | getClassTypeId () |
| static int | getClassStackIndex () |
| static void | set (SoState *state, SbBool value, SoNode *node=NULL) |
| static SbBool | get (SoState *state, int unit=0) |
| static SbBool | getDefault () |
| static void | disableForShapeCache (SoState *state, int unit, bool disable) |
| static bool | isDisabledForShapeCache (SoState *state, int unit) |
Detailed Description
Enables/disables textures.
This element enables/disables textures. This is implemented as a separate element from the TextureImageElement so the texture image can be changed without invalidating caches containing shapes -- shapes need to know if texturing is going on or not so they can decide to send down texture coordinates or not.
This element is set by the GLTextureImageElement and the GLTextureImageElement, but the interaction between the three elements is a little complicated. Each of the other two elements always sets up the GL texture state appropriately, however, texturing is only enabled if both elements agree that it should be enabled (they check each other's value before calling set).
This element cannot be overridden, but, since the elements that set it check each other's value, overriding those elements has the same effect.
SEE ALSO
SoTexture2, SoExtTexture2, SoImageBackground, SoTextureCubeMapEnabledElement, SoTexture3EnabledElement
Member Function Documentation
| static void SoTextureEnabledElement::disableForShapeCache | ( | SoState * | state, | |
| int | unit, | |||
| bool | disable | |||
| ) | [static] |
Specify that a texture unit is not used by any shape, so we don't have to invalidate cache when this texture is enable/disable/modified.
Used by shapes to figure out if they need to send texture coordinates.
| static int SoTextureEnabledElement::getClassStackIndex | ( | ) | [static] |
Returns the stack id for this element.
Reimplemented from SoReplacedTextureElement.
| static SoType SoTextureEnabledElement::getClassTypeId | ( | ) | [static] |
Returns the type identifier for this class.
Reimplemented from SoReplacedTextureElement.
| static SbBool SoTextureEnabledElement::getDefault | ( | ) | [inline, static] |
By default there is no texture.
| static bool SoTextureEnabledElement::isDisabledForShapeCache | ( | SoState * | state, | |
| int | unit | |||
| ) | [static] |
Return if that texture unit is not used by any shape, so we don't have to invalidate cache when this texture is enable/disable/modified.
| virtual void SoTextureEnabledElement::pop | ( | SoState * | state, | |
| const SoElement * | prevTopElement | |||
| ) | [virtual] |
Overrides pop() method so side effects can occur in GL.
| virtual void SoTextureEnabledElement::push | ( | SoState * | state | ) | [virtual] |
Overrides push() so we can remember previous element's value and avoid making GL calls if this element has the same value.
Reimplemented from SoReplacedTextureElement.
| static void SoTextureEnabledElement::set | ( | SoState * | state, | |
| SbBool | value, | |||
| SoNode * | node = NULL | |||
| ) | [static] |
Used by GLTextureImageElement, set to TRUE when a non-null image is set, set to FALSE when there is no texture image (the default).
The documentation for this class was generated from the following file:
- Inventor/elements/SoTextureEnabledElement.h