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#include <movietexture.h>
Inherits Node.
Public Member Functions | |
MovieTexture (const char *name="") | |
virtual | ~MovieTexture () |
virtual unsigned int | nbFields () const |
virtual FieldHandle | field (const std::string &n) |
virtual FieldHandle | field (unsigned int i) |
virtual bool | isSetToDefaultValue (unsigned int i) const |
virtual unsigned int | nbEventsIn () const |
virtual EventInHandle | eventIn (const std::string &n) |
virtual EventInHandle | eventIn (unsigned int i) |
virtual unsigned int | nbEventsOut () const |
virtual EventOutHandle | eventOut (const std::string &n) |
virtual EventOutHandle | eventOut (unsigned int i) |
const char * | typeName () const |
virtual Node * | duplicate () const |
virtual Node * | duplicate (std::map< const Node *, Node * > &) const |
Public Attributes | |
Exposed Fields | |
A field that is capable of receiving events via an eventIn to change its value(s), and generating events via an eventOut when its value(s) change. | |
SFBool | loop |
SFFloat | speed |
SFTime | startTime |
SFTime | stopTime |
MFString | url |
Fields | |
A property or attribute of a node. Each node type has a fixed set of fields. Fields may contain various kinds of data and one or many values. Each field has a default value. | |
SFBool | repeatS |
SFBool | repeatT |
Events In | |
EventIn< SFBool > | set_loop |
EventIn< SFFloat > | set_speed |
EventIn< SFTime > | set_startTime |
EventIn< SFTime > | set_stopTime |
EventIn< MFString > | set_url |
Events Out | |
EventOut< SFTime > | duration_changed |
EventOut< SFBool > | isActive |
EventOut< SFBool > | loop_changed |
EventOut< SFFloat > | speed_changed |
EventOut< SFTime > | startTime_changed |
EventOut< SFTime > | stopTime_changed |
EventOut< MFString > | url_changed |
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.
The url field that defines the movie data shall support MPEG1-Systems (audio and video) or MPEG1-Video (video-only) movie file formats 2.[MPEG]. Details on the url field can be found in 4.5, VRML and the World Wide Web.
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, for a general description of texture maps.
4.14, Lighting model, 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. 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.
MovieTexture | ( | const char * | name = "" |
) |
~MovieTexture | ( | ) | [virtual] |
Virtual destructor, does nothing
unsigned int nbFields | ( | ) | const [inline, virtual] |
Returns the number of fields (exposed or not) for this node type.
Implements Node.
wrl::Node::FieldHandle field | ( | const std::string & | n | ) | [virtual] |
Return a handle on the field named n
of the node or a "unknown" typed handle if there is no such field. Valid names are:
Implements Node.
wrl::Node::FieldHandle field | ( | unsigned int | n | ) | [virtual] |
Return a handle on the i
th field of the node or a "unknown" typed handle if there is no such node. Here is how i
is related to fields:
Implements Node.
bool isSetToDefaultValue | ( | unsigned int | i | ) | const [virtual] |
Implements Node.
unsigned int nbEventsIn | ( | ) | const [inline, virtual] |
Returns the number of events in for this node type.
Implements Node.
wrl::Node::EventInHandle eventIn | ( | const std::string & | n | ) | [virtual] |
Return a handle on the event in named n
of the node or a "unknown" typed handle if there is no such event. Valid names are:
Implements Node.
wrl::Node::EventInHandle eventIn | ( | unsigned int | n | ) | [virtual] |
Return a handle on the i
th event in of the node or a "unknown" typed handle if there is no such node. emarks This class has no eventIn. This function is useful, with nbEventsIn() if you want to traverse all events in of a Node.
Implements Node.
unsigned int nbEventsOut | ( | ) | const [inline, virtual] |
Returns the number of events out for this node type.
Implements Node.
wrl::Node::EventOutHandle eventOut | ( | const std::string & | n | ) | [virtual] |
Return a handle on the event out named n
of the node or a "unknown" typed handle if there is no such event. Valid names are:
Implements Node.
wrl::Node::EventOutHandle eventOut | ( | unsigned int | n | ) | [virtual] |
Return a handle on the i
th event out of the node or a "unknown" typed handle if there is no such node. Here is how i
is related to fields:
Implements Node.
const char * typeName | ( | ) | const [inline, virtual] |
Returns "MovieTexture"
. Useful for printing.
Implements Node.
wrl::Node * duplicate | ( | ) | const [virtual] |
Returns a deep copy of this node, that is a fully independant node with all children (if any) also copied. This is mainly useful for instanciating protos.
Implements Node.
See Detailed Description for meaning of this field. Default value is set to
loop = false;
See Detailed Description for meaning of this field. Default value is set to
speed = 1.0f;
See Detailed Description for meaning of this field. Default value is set to
startTime.setNbSeconds(0);
See Detailed Description for meaning of this field. Default value is set to
stopTime.setNbSeconds(0);
See Detailed Description for meaning of this field. Default value is set to MFString default value
See Detailed Description for meaning of this field. Default value is set to
repeatS = true;
See Detailed Description for meaning of this field. Default value is set to
repeatT = true;
Set event associated to exposedField startTime
Set event associated to exposedField stopTime
See Detailed Description for meaning of this event.
See Detailed Description for meaning of this event.
Changed event associated to exposedField loop
Changed event associated to exposedField speed
Changed event associated to exposedField startTime
Changed event associated to exposedField stopTime
Changed event associated to exposedField url
Generated on 5 Jan 2007 with
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