SoVRMLMovieTexture - Online Linux Manual PageSection : 3
Updated : Mon Jan 25 2021
Source : Version 4.0.0
Note : Coin
NAMESoVRMLMovieTexture − The SoVRMLMovieTexture class is used the map movies onto geometry​.
SYNOPSIS
#include <Inventor/VRMLnodes/SoVRMLMovieTexture​.h> Inherits SoVRMLTexture​.
Public Member Functionsvirtual SoType getTypeId (void) const
Returns the type identification of an object derived from a class inheriting SoBase​. This is used for run-time type checking and 'downward' casting​. SoVRMLMovieTexture (void)
virtual void GLRender (SoGLRenderAction *action)
Static Public Member Functionsstatic SoType getClassTypeId (void)
static void initClass (void)
Public AttributesSoSFBool loop
SoSFFloat speed
SoSFTime startTime
SoSFTime stopTime
SoSFTime pauseTime
SoSFTime resumeTime
SoMFString url
SoSFTime duration_changed
SoSFBool isActive
SoSFFloat alpha
SoSFEnum model
SoSFColor blendColor
SoSFBool scaleTexCoord
Protected Member Functionsvirtual const SoFieldData * getFieldData (void) const
virtual ~SoVRMLMovieTexture ()
Static Protected Member Functionsstatic const SoFieldData ** getFieldDataPtr (void)
Additional Inherited Members
Detailed DescriptionThe SoVRMLMovieTexture class is used the map movies onto geometry​. The detailed class documentation is taken verbatim from the VRML97 standard (ISO/IEC 14772-1:1997)​. It is copyright The Web3D Consortium, and is used by permission of the Consortium:

MovieTexture { exposedField SFBool loop FALSE exposedField SFFloat speed 1.0 # (-inf, inf) exposedField SFTime startTime 0 # (-inf, inf) exposedField SFTime stopTime 0 # (-inf, inf) exposedField MFString url [] field SFBool repeatS TRUE field SFBool repeatT TRUE eventOut SFTime duration_changed eventOut SFBool isActive } The MovieTexture node defines a time dependent texture map (contained in a movie file) and parameters for controlling the movie and the texture mapping​. A MovieTexture node can also be used as the source of sound data for a Sound node​. In this special case, the MovieTexture node is not used for rendering​.
Texture maps are defined in a 2D coordinate system (s, t) that ranges from 0​.0 to 1​.0 in both directions​. The bottom edge of the image corresponds to the S-axis of the texture map, and left edge of the image corresponds to the T-axis of the texture map​. The lower-left pixel of the image corresponds to s=0​.0, t=0​.0, and the top-right pixel of the image corresponds to s=1​.0, t=1​.0​. Figure 6​.12 depicts the texture map coordinate system of the MovieTexture​.
  Figure 6​.12 -- MovieTexture node coordinate system The url field that defines the movie data shall support MPEG1-Systems (audio and video) or MPEG1-Video (video-only) movie file formats 2 Details on the url field can be found in 4​.5, VRML and the World Wide Web (http://www.web3d.org/documents/specifications/14772/V2.0/part1/concepts.html#4.5)​. MovieTexture nodes can be referenced by an Appearance node's texture field (as a movie texture) and by a Sound node's source field (as an audio source only)​. See 4​.6​.11, Texture maps (http://www.web3d.org/documents/specifications/14772/V2.0/part1/concepts.html#4.6.11), for a general description of texture maps​. 4​.14, Lighting model (http://www.web3d.org/documents/specifications/14772/V2.0/part1/concepts.html#4.14), contains details on lighting equations and the interaction between textures, materials, and geometries​.
As soon as the movie is loaded, a duration_changed eventOut is sent​. This indicates the duration of the movie in seconds​. This eventOut value can be read (for instance, by a Script node) to determine the duration of a movie​. A value of '-1' implies the movie has not yet loaded or the value is unavailable for some reason​.
The loop, startTime, and stopTime exposedFields and the isActive eventOut, and their effects on the MovieTexture node, are discussed in detail in the 4​.6​.9, Time-dependent nodes, section (http://www.web3d.org/documents/specifications/14772/V2.0/part1/concepts.html#4.6.9)​. The cycle of a MovieTexture node is the length of time in seconds for one playing of the movie at the specified speed​. The speed exposedField indicates how fast the movie shall be played​. A speed of 2 indicates the movie plays twice as fast​. The duration_changed output is not affected by the speed exposedField​. set_speed events are ignored while the movie is playing​. A negative speed implies that the movie will play backwards​.
If a MovieTexture node is inactive when the movie is first loaded, frame 0 of the movie texture is displayed if speed is non-negative or the last frame of the movie texture is shown if speed is negative (see 4​.11​.3, Discrete and continuous changes)​. A MovieTexture node shall display frame 0 if speed = 0​. For positive values of speed, an active MovieTexture node displays the frame at movie time t as follows (i​.e​., in the movie's local time system with frame 0 at time 0 with speed = 1): t = (now - startTime) modulo (duration/speed)If speed is negative, the MovieTexture node displays the frame at movie time: t = duration - ((now - startTime) modulo |duration/speed|)When a MovieTexture node becomes inactive, the frame corresponding to the time at which the MovieTexture became inactive will remain as the texture​.
Constructor & Destructor Documentation
SoVRMLMovieTexture::SoVRMLMovieTexture (void)Constructor​.
SoVRMLMovieTexture::~SoVRMLMovieTexture () [protected], [virtual]Destructor​.
Member Function Documentation
SoType SoVRMLMovieTexture::getTypeId (void) const [virtual]Returns the type identification of an object derived from a class inheriting SoBase​. This is used for run-time type checking and 'downward' casting​. Usage example: void foo(SoNode * node) { if (node->getTypeId() == SoFile::getClassTypeId()) { SoFile * filenode = (SoFile *)node; // safe downward cast, knows the type } }For application programmers wanting to extend the library with new nodes, engines, nodekits, draggers or others: this method needs to be overridden in all subclasses​. This is typically done as part of setting up the full type system for extension classes, which is usually accomplished by using the pre-defined macros available through for instance Inventor/nodes/SoSubNode​.h (SO_NODE_INIT_CLASS and SO_NODE_CONSTRUCTOR for node classes), Inventor/engines/SoSubEngine​.h (for engine classes) and so on​. For more information on writing Coin extensions, see the class documentation of the toplevel superclasses for the various class groups​. Reimplemented from SoVRMLTexture​.
const SoFieldData * SoVRMLMovieTexture::getFieldData (void) const [protected], [virtual]Returns a pointer to the class-wide field data storage object for this instance​. If no fields are present, returns NULL​. Reimplemented from SoVRMLTexture​.
void SoVRMLMovieTexture::GLRender (SoGLRenderAction * action) [virtual]Action method for the SoGLRenderAction​. This is called during rendering traversals​. Nodes influencing the rendering state in any way or who wants to throw geometry primitives at OpenGL overrides this method​. Reimplemented from SoVRMLTexture​.
Member Data Documentation
SoSFBool SoVRMLMovieTexture::loopSpecifies whether movie should be looped or not​. Default value is FALSE​.
SoSFFloat SoVRMLMovieTexture::speedSpecifies the relative speed​. Default value is 1​.0​.
SoSFTime SoVRMLMovieTexture::startTimeSpecifies the start time​.
SoSFTime SoVRMLMovieTexture::stopTimeSpecifies the stop time​.
SoMFString SoVRMLMovieTexture::urlThe filename URL​.
SoSFTime SoVRMLMovieTexture::duration_changedAn eventOut that is signaled after the node is loaded or inserted in the scene graph​.
SoSFBool SoVRMLMovieTexture::isActiveAn eventOut that is signaled when the movie begins/finishes playing​.
AuthorGenerated automatically by Doxygen for Coin from the source code​. 0
Johanes Gumabo
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