ISO/IEC 18023-1:200x(E) — Table 6.254 DRM_Stamp

Table 6.254 — DRM_Stamp_Behaviour

Property

Description

Class

<DRM Stamp Behaviour>

Superclass

<DRM SEDRIS Abstract Base>

Subclass

None.

Definition

An instance of this DRM class indicates that the <DRM Geometry Hierarchy> instance of which the <DRM Stamp Behaviour> is a component rotates automatically with respect to the viewer's location, attempting to continually face the viewer.

The <DRM Geometry Hierarchy> rotates about the x, y and / or z axes, within the specified angular limits. The centre of rotation is specified by the component <DRM 3D Location>. The axes are positioned at the centre of rotation, aligned with the equivalent spatial reference frame axes. Geometry with <DRM Stamp Behaviour> is normally planar in nature and is considered to “face” along the normal of that plane.

If an axis' clockwise limit is set to SE_POSITIVE_INFINITY and its counter-clockwise limit is set to SE_NEGATIVE_INFINITY, then the aggregating <DRM Geometry Hierarchy> can rotate freely about that axis. If all axis limits are set in this way, then the <DRM Geometry Hierarchy> will rotate freely in any direction about the centre of rotation.

Class diagram

Figure 6.303 — DRM_Stamp_Behaviour

Inherited field elements

Field name	Range	Field data type
None

Field elements

Field name	Range	Field data type
x_axis_limits ¹		Rotation_Data
y_axis_limits ²		Rotation_Data
z_axis_limits ³		Rotation_Data

Associated to (one-way) (inherited)

None.

Associated to (one-way)

None.

Associated by (one-way) (inherited)

None.

Associated by (one-way)

None.

Associated with (two-way) (inherited)

None.

Associated with (two-way)

None.

Composed of (two-way) (inherited)

None.

Composed of (two-way)

one <DRM 3D Location> instance⁴

Composed of (two-way metadata) (inherited)

None.

Composed of (two-way metadata)

None.

Component of (two-way) (inherited)

None.

Component of (two-way)

zero or more <DRM Aggregate Geometry> instances
zero or more <DRM Geometry Model Instance> instances

Constraints

Publishable Object

Clarifications

¹ These are the angular limits, and are specified in degrees.

² These are the angular limits, and are specified in degrees.

³ These are the angular limits, and are specified in degrees.

⁴ This is the centre of rotation.

Example(s)

A <DRM Union Of Primitive Geometry>, containing a single textured <DRM Polygon>, rotating freely about the z axis to represent a tree.
The <DRM Union Of Primitive Geometry> would have a component <DRM Stamp Behaviour>. x_axis_limits and y_axis_limits would be set to 0,0 for both clockwise and counter-clockwise limits. z_axis_limits would be set to SE_POSITIVE_INFINITY for clockwise and SE_NEGATIVE_INFINITY for counter-clockwise. The <DRM Stamp Behaviour> would have a component <DRM 3D Location> located at the base of the tree so that the z axis runs up the centre of the tree.