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

Annex H

(normative)

CADInterchange profile

# H.1 General

This annex defines the X3D components that comprise the CADInterchange profile. This annex includes not only the nodes that shall be supported but also which fields in the supported nodes may be ignored.

This profile is targeted towards:

- Distillation of computer-aided design (CAD) data to downstream applications.
- Appropriately supporting Geometry and Appearance capabilities data for CAD.

# H.2 Topics

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

Table H.1 — Topics

H.1 General H.2 Topics in this annex H.3 Component support H.4 Conformance criteria H.5 Node set H.6 Other limitations Table H.1 — Topics Table H.2 — Components and levels Table H.3 — Nodes for conforming to the CADInterchange profile Table H.4 — Other limitations Table H.5 — Node set

# H.3 Component support

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

Table H.2 — Components and levels

Component | Level | Reference
--- | --- | ---
Core | 1 | 7.5 Support levels
Networking | 2 | 9.5 Support levels
Grouping | 1 | 10.5 Support levels
Rendering | 4 | 11.5 Support levels
Shape | 2 | 12.5 Support levels
Lighting | 1 | 17.5 Support levels
Texturing | 2 | 18.5 Support levels
Navigation | 2 | 23.4 Support levels
Shaders | 1 | 31.5 Support levels
CADGeometry | 2 | 32.5 Support levels

# H.4 Conformance criteria

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

In Tables H.3 and H.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 an X3D file conforming to the CADInterchange profile; if an X3D file contains any items that exceed these limits, it may not be possible for an X3D browser conforming to the CADInterchange profile to successfully parse that X3D file. The third column defines the minimum complexity for an X3D scene that an X3D browser conforming to the CADInterchange profile shall be able to present to the user. Fields flagged as "not supported" may be supported by browsers which conform to the CADInterchange profile. 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.

# H.5 Node set

Table H.3 lists the nodes which shall be supported in the CADInterchange profile and specifies any fields in these nodes for which this profile requires less than full support.

Table H.3 — Nodes for conforming to the CADInterchange profile

Item | X3D File Limit | Minimum Browser Support
--- | --- | ---
Anchor | No restrictions. | Full support.
Appearance | No restrictions. | fillProperties not supported.
CADAssembly | No restrictions. | Full support.
CADFace | No restrictions. | Full support.
CADLayer | No restrictions. | Full Support
CADPart | No restrictions. | Full support.
Billboard | No restrictions. | Can treat as just a grouping node, no runtime requirements
Collision | No restrictions. | Can treat as just a grouping node, no runtime requirements
Color | 5,592,405 colours. | 5,592,405 colours.
ColorRGBA | 4,194,304 colours. | 4,194,304 colours
Coordinate | 16,777,216 points | 16,777,216 points.
DirectionalLight | No restrictions. | Full support.
FragmentShader | No restrictions. | Full support.
Group | Restrictions as for all groups. | addChildren not supported. removeChildren not supported. Otherwise as for all groups.
ImageTexture | JPEG ([JPEG]) and PNG ([I15948]) format. | JPEG ([JPEG]) and PNG ([I15948]) format.
IndexedLineSet | 5,592,405 total vertices. 5,592,405 indices in any index field. | 5,592,405 total vertices. 5,592,405 indices in any index field.
IndexedQuadSet | 5,592,405 total faces. 5,592,405 indices in any index field. | 5,592,405 total faces. 5,592,405 indices in any index field.
IndexedTriangleFanSet | 5,592,405 total faces. 5,592,405 indices in any index field. | 5,592,405 total faces. 5,592,405 indices in any index field.
IndexedTriangleSet | 5,592,405 total faces. 5,592,405 indices in any index field. | 5,592,405 total faces. 5,592,405 indices in any index field.
IndexedTriangleStripSet | 5,592,405 total faces. 5,592,405 indices in any index field. | 5,592,405 total faces. 5,592,405 indices in any index field.
Inline | No restrictions. | Optional support for load field. Other fields full support.
LineProperties | No restrictions. | Full support.
LineSet | 5,592,405 total vertices. | 5,592,405 total vertices.
LOD | No restrictions. | Runtime switching not required. An implementation can select one level and display
Material | No restrictions. | Full support.
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.
MultiShader | No restrictions. | Full support.
MultiTexture | No restrictions. | At least one texture displayed per node with any number specified. Full support.
MultiTextureCoordinate | 15,000 coordinates. | 15,000 coordinates.
MultiTextureTransform | No restrictions. | Full support.
NavigationInfo | No restrictions. | avatarSize optionally supported. speed optionally supported. type optionally supported. visibilityLimit optionally supported.
Normal | 5,592,405 normals | 5,592,405 normals.
PixelTexture | 512 width. 512 height. | 512 width. 512 height. Display fully transparent and fully opaque pixels.
PointSet | 5,592,405 points. | 5,592,405 points.
QuadSet | 5,592,405 total faces. 5,592,405 indices in any index field. | 5,592,405 total faces. 5,592,405 indices in any index field.
Shader | No restrictions. | Full support.
ShaderAppearance | No restrictions. | Full support.
Shape | No restrictions. | Full support.
TextureCoordinate | 5,592,405 coordinates. | 5,592,405 coordinates.
TextureCoordinateGenerator | No restrictions. | Full support.
TextureTransform | No restrictions. | Full support.
Transform | Restrictions as for all groups. | addChildren not supported. removeChildren not supported. Otherwise, full support except as for all groups.
TriangleFanSet | 5,592,405 triangles per fan. 5,592,405 total triangles. | 5,592,405 triangles per fan. 5,592,405 total triangles.
TriangleSet | 5,592,405 triangles | 5,592,405 triangles
TriangleStripSet | 5,592,405 triangles per strip. 5,592,405 total triangles | 5,592,405 triangles per strip. 5,592,405 total triangles.
Viewpoint | No restrictions. | Full support.
VertexShader | No restrictions. | Full support.
WorldInfo | No restrictions. | Full support.

# H.6 Other limitations

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

Table H.4 — Other limitations

Item | X3D File Limit | Minimum Browser Support
--- | --- | ---
All groups | 16777216 children. | 16777216 children.
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 | No restrictions. | Full support. Range ±1e±12. Precision 1e-7.
SFFloat | No restrictions. | Full support.
SFImage | 512 width. 512 height. | 512 width. 512 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.