© 2009 bentley systems, incorporated thomas taylor, bentley civil ew-14 exploring template...
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Thomas Taylor, Bentley Civil
EW-14 Exploring Template Constraints and Display Rules
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• Template Point Constraints– Constraint definition– Types of constraints– Constraint behavior– Constraint Variables– Constraint Labels
• Component Display Rules– Display Rule Definition– Template creation with CDR– Application of CDR
Topics covered
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Point Constraint Definition
– Used to manage the behavior of template points
• How points move with respect to one another
– A single point can have up to 2 constraints **there is an exception
– Fully constrained points are red (two constraints)
– Partially constrained points are yellow (one constraint)
– Unconstrained points are green (no constraints)
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Point Constraint DefinitionA
B
A
B
•Parent Child point relationship• Point B is the Child of Parent
point A
•Horizontal Constraint• Child is horizontally constrained to parent
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Point Constraint Definition
•Vertical Constraint• Child is vertically constrained
to Parent
•Horizontal and Vertical Constraint• Child is horizontally and
Vertically constrained to Parent
•Slope Constraint• Child is constrained to parent by slope
AB
AB
AB
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Other Point Constraints Defined
•Vector Offset constraint• Child C is constrained to
parents A & B with a 2.0 offset.
•Horizontal Minimum and Maximum Constraint
• Child C is constrained to parents A & B
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Other Point Constraints Defined
•Vertical Minimum and Maximum Constraint• Child C is constrained to
parents A & B
•Angle Distance • Child C (and D) is constrained to parents A & B by an angle and distance. (rigid body rotation)
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Point Constraint Value Equation
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Point Constraint Label
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Component Display Rules
1. The individual Rule (stored in the template)
HorizontalAbsolute HorizontalVerticalAbsolute VerticalSlopeAbsolute SlopeComponent is Displayed
2. The conditional expression (stored on the component)
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Component Display Rules
The Conditional ExpressionContains the Rule name and operational expressions
with parenthetical hierarchical structure.Rule1 OR (Rule2 AND Rule3)
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Topics covered
This workshop has taken you through some steps involved in defining, creating, and testing Component Point Constraints and Component Display Rules.
The following items were covered:
Reviewed the types of point constraints Created components with various constraint types
Edited a template to include a median retaining wall to accommodate vertical grade separation.
Established a set of Component Display Rules to apply to the retaining wall when the vertical difference is exceeded.
Updated the Roadway Design with the new template containing Component Display Rules and reviewed the results.