Extensible 3D (X3D)
Part 1: Architecture and base components

Annex D


MPEG-4 interactive profile

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cube D.1 General

This annex defines the X3D components which comprise the MPEG-4 interactive profile. This includes not only the nodes which shall be supported but also which fields in the supported nodes may be ignored.

This profile is targeted towards:

cube D.2 Topics

Table D.1 provides links to the major topics in this annex.

Table D.1 — Topics

cube D.3 Component support

Table D.2 lists the components and their levels which shall be supported in the MPEG-4 interactive profile. Tables D.2 and D.3 describe limitations on required support for nodes and fields contained within these components.

Table D.2 — Components and levels

Component Level Reference
Core 1 7.5 Support levels
Time 1 8.5 Support levels
Networking 2 9.5 Support levels
Grouping 2 10.5 Support levels
Rendering 1 11.5 Support levels
Shape 1 12.5 Support levels
Geometry3D 2 13.4 Support levels
Lighting 2 17.5 Support levels
Texturing 1 18.5 Support levels
Interpolation 2 19.5 Support levels
Pointing device sensor 1 20.5 Support levels
Environmental sensor 1 22.5 Support levels
Navigation 1 23.4 Support levels
Environmental effects 1 24.5 Support levels

cube D.4 Conformance criteria

Conformance to this profile shall include conformance criteria defined by the specifications for those components and levels listed in Table D.2.

In Tables D.3 and D.4, the first column defines the item for which conformance is being defined. In some cases, general limits are defined but are later overridden in specific cases by more restrictive limits. The second column defines the requirements for a X3D file conforming to the MPEG-4 interactive profile; if a X3D file contains any items that exceed these limits, it may not be possible for a X3D browser conforming to the MPEG-4 interactive profile to successfully parse that X3D filD. The third column defines the minimum complexity for a X3D scene that a X3D browser conforming to the MPEG-4 interactive profile shall be able to present to the user. Fields flagged as "not supported" may be supported by browsers which conform to the MPEG-4 interactive profilD. The word "ignore" in the minimum browser support column refers only to the display of the item; in particular, set_ events to ignored inputOutput fields shall still generate corresponding _changed events.

cube D.5 Node set

Table D.3 lists the nodes that shall be supported in the MPEG-4 interactive profile and specifies any fields in these nodes for which this profile requires less than full support.

Table D.3 — Nodes for conforming to the MPEG-4 Interactive profile

Item File Limit Minimum Browser Support
Anchor No restrictions. addChildren optionally supported. removeChildren optionally supported. Ignore parameter. Ignore description.
Appearance No restrictions. textureTransform optionally supported.
lineProperties not supported. fillProperties not supported.
Background No restrictions. groundAngle and groundColor optionally supported. backURL, frontURL, leftURL, rightURL, topURL optionally supported. skyAngle optionally supported. One skyColor.
Box No restrictions. Full support.
Color 15,000 colours. 15,000 colours.
ColorInterpolator Restrictions as for all interpolators. Full support as for all interpolators.
ColorRGBA 15,000 colours. 15,000 colours. Alpha component optionally supported.
Cone No restrictions. Full support.
Coordinate 65,535 points 65,535 points.
CoordinateInterpolator 15,000 coordinates per keyValuD. Restrictions as for all interpolators. 15,000 coordinates per keyValue. Support as for all interpolators.
Cylinder No restrictions. Full support.
CylinderSensor No restrictions. Full support.
DirectionalLight No restrictions. Not scoped by parent Group or Transform.
ElevationGrid No restrictions. ccw optionally supported.
Group Restrictions as for all groups. Full support except as for all groups.
ImageTexture JPEG (2.[JPEG]) and PNG (2.[I15948]) format. JPEG (2.[JPEG]) and PNG (2.[I15948]) format.
IndexedFaceSet 10 vertices per facD. 5000 faces. Less than 65,535 indices. ccw optionally supported. set_colorIndex optionally supported. set_normalIndex optionally supported. normal optionally supported. Only convex indexed face sets supported. Hence, convex optionally supported. For creaseAngle, only 0 and π radians supported (or the equivalent if a different angle base unit has been specified). normalIndex optionally supported. 10 vertices per face. 5000 faces. 65,535 indices in any index field. Face list shall be well-defined as follows:
  1. Each face is terminated with −1, including the last face in the array.
  2. Each face contains at least three non-coincident vertices.
  3. A given coordIndex is not repeated in a face.
  4. The vertices of a face shall define a planar polygon.
  5. The vertices of a face shall not define a self-intersecting polygon.
IndexedLineSet 15,000 total vertices. 15,000 indices in any index field. 15,000 total vertices. 15,000 indices in any index field. set_colorIndex optionally supported. set_coordIndex optionally supported.
Inline No restrictions. All fields except load which is optionally supported.
LineSet 15,000 total vertices. 15,000 total vertices.
Material No restrictions. ambientIntensity optionally supported. shininess optionally supported. specularColor optionally supported. A Material with emissiveColor not equal to (0,0,0), diffuseColor equal to (0,0,0) is an unlit material. One-bit transparency; transparency values ≥ 0.5 transparent.
MetadataBoolean No restrictions. Full support.
MetadataDouble No restrictions. Full support.
MetadataFloat No restrictions. Full support.
MetadataInteger No restrictions. Full support.
MetadataSet No restrictions. Full support.
MetadataString No restrictions. Full support.
NavigationInfo No restrictions. avatarSize optionally supported. speed optionally supported. type optionally supported. visibilityLimit optionally supported.
NormalInterpolator Restrictions as for all interpolators. Full support except as for all interpolators.
OrientationInterpolator Restrictions as for all interpolators. Full support except as for all interpolators.
PixelTexture 512 width. 512 height. 512 width. 512 height. Display fully transparent and fully opaque pixels.
PlaneSensor No restrictions. Full support.
PointLight No restrictions. radius optionally supported. Linear attenuation.
PointSet 5000 points. 5000 points.
PositionInterpolator Restrictions as for all interpolators. Full support except as for all interpolators.
ProximitySensor No restrictions. position_changed optionally supported. orientation_changed optionally supported.
ScalarInterpolator Restrictions as for all interpolators. Full support except as for all interpolators.
Shape No restrictions. Full support.
Sphere No restrictions. Full support.
SphereSensor No restrictions. Full support.
SpotLight No restriction beamWidth optionally supported. radius optionally supported. Linear attenuation.
Switch No restrictions Full support.
TextureCoordinate 65,535 coordinates. 65,535 coordinates.
TextureTransform No restrictions. Full support.
TimeSensor No restrictions. pause optionally supported.
isPaused optionally supported. resumeTime optionally supported.
TouchSensor No restrictions. Full support.
Transform Restrictions as for all groups. Full support except as for all groups.
Viewpoint No restrictions. fieldOfView optionally supported.
description optionally supported.
WorldInfo No restrictions. Full support.

cube D.6 Other limitations

Table D.4 specifies other aspects of X3D functionality that are supported by this profile. Note that general items refer only to those specific nodes listed in Table D.3.

Table D.4 — Other limitations

Item X3D File Limit Minimum Browser Support
All groups 500 children. 500 children. Ignore bboxCenter and bboxSizD.
All interpolators 1000 key-value pairs. 1000 key-value pairs.
All lights 8 simultaneous lights. 8 simultaneous lights.
Names for DEF/field 50 utf8 octets. 50 utf8 octets.
All url fields 10 URLs. 10 URLs. URN's ignored.
Support `http', `file', and `ftp' protocols.
Support relative URLs where relevant.
SFBool No restrictions. Full support.
SFColor No restrictions. Full support.
SFColorRGBA No restrictions. Full support.
SFDouble Mp restrictions. Full support. Range ±1e±12. Precision 1e−7.
SFFloat No restrictions. Full support.
SFImage 256 width. 256 height. 256 width. 256 height.
SFInt32 No restrictions. Full support.
SFNode No restrictions. Full support.
SFRotation No restrictions. Full support.
SFString 30,000 utf8 octets. 30,000 utf8 octets.
SFTime No restrictions. Full support.
SFVec2d 15,000 values. 15,000 values.
SFVec2f 15,000 values. 15,000 values.
SFVec3d 15,000 values. 15,000 values.
SFVec3f 15,000 values. 15,000 values.
MFColor 15,000 values. 15,000 values.
MFColorRGBA 15,000 values. 15,000 values.
MFDouble 1000 values. 1000 values.
MFFloat 1,000 values. 1,000 values.
MFInt32 20,000 values. 20,000 values.
MFNode 500 values. 500 values.
MFRotation 1,000 values. 1,000 values.
MFString 30,000 utf8 octets per string, 10 strings. 30,000 utf8 octets per string, 10 strings.
MFTime 1,000 values. 1,000 values.
MFVec2d 15,000 values. 15,000 values.
MFVec2f 15,000 values. 15,000 values.
MFVec3d 15,000 values. 15,000 values.
MFVec3f 15,000 values. 15,000 values.
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