Class Name: Reference Vector Control Link

Superclass - Control Link

Definition

The specialized Control Link used to provide the connection between an ordered aggregation of Expressions and the target fields of a Reference Vector.

The v0_expr_index field is a 1-based index into the ordered aggregation of Expressions, and is used to select the specific Expression that controls the unit_vector.vector[0] field of the Reference Vector.

The v1_expr_index field is a 1-based index into the ordered aggregation of Expressions, and is used to select the specific Expression that controls the unit_vector.vector[1] field of the Reference Vector.

The v2_expr_index field is a 1-based index into the ordered aggregation of Expressions, and is used to select the specific Expression that controls the unit_vector.vector[2] field of the Reference Vector.

Primary Page in DRM Diagram:

• 17

Secondary Pages in DRM Diagram:

• 5

Example

1. For the Reference Vector component of a Polygon the Reference Vector is its normal, so the Expressions would compute the 3 fields of the normal of a Polygon.

2. A Model of a lighthouse has a Geometry Model with a Union of Geometry Hierarchy, to which is attached a Spot Light representing the lighthouse's light. The Spot Light has a Lobe Data describing the shape of the light code, in which a Reference Vector specifies the light direction. The SE_LIGHT_DIRECTION Reference Vector has a Reference Vector Control Link to change the direction vector of the light so that the lighthouse light sweeps over an area rather than holding stationary.

FAQs

Constraints

Composed of (two-way)(inherited)

• one or more {ordered} Expressions

Component of (two-way)

• one or more Base Reference Vectors

Inherited Field Elements

Field Elements

Notes

Fields Notes

description

 A text description of what the Control_Link is for

expr_index_v0

 index of the expression whose value controls
 the unit_vector.vector[0] field of the affected <Reference_Vector>.
 If 0, this field is not controlled.

expr_index_v1

 index of the expression whose value controls
 the unit_vector.vector[1] field of the affected <Reference_Vector>.
 If 0, this field is not controlled.

expr_index_v2

 index of the expression whose value controls
 the unit_vector.vector[2] field of the affected <Reference_Vector>.
 If 0, this field is not controlled.