Calculated Values. Autodesk AUTOSKETCH 8

3 Select a Field Name from the list.

4 Enter a value for the selected field that is applicable to the selected entities.

5 Click OK.

To assign one or more fields to a single entity

1 Select an entity to which you want to assign a field.

2 On the Database menu, click Edit Entity Fields. The Edit Entity Fields dialog box appears.

3 Click in the value text box for a field and enter a new value. Repeat this step to edit other values.

4 (optional) Click Edit Again, click another entity, and repeat step 3.

5 Click OK.

NOTE The Edit Entity Fields dialog box can be resized, in order to access or view the fields for an entity.

Calculated Values

Instead of entering a constant value in a field, you can assign it a calculated

value. AutoSketch updates the calculated value each time the drawing changes. For example, the calculated value “%Length” returns the length of a line, arc, circle, polyline, or polygon and stores the length in the field. If you change the length of that entity, AutoSketch instantly updates the calculated value assigned to that entity. If that field is visible, you can see the change.

You enter a calculated value just as you would any other value. AutoSketch returns the text or numbers to the field automatically. There are specific calculated values for the five different field types. AutoSketch ignores the calculated value if the field type is not correct, for example if %Length is used in a string field.

NOTE Dimensions and text entities cannot have fields assigned to them.

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String .

The following calculated values return a text string:

Value

%Layer

%Color

%Style

%Width

For entity type any any any any

Returns layer name color name style name width name

Number .

The following calculated values return a number formatted as a scalar value:

Value

%Length

%Height

%Width

%X

%X

%Y

Value

%Color

%Width

%SX

%SY

For entity type any any marker or symbol marker or symbol

Returns color index width index horizontal scaling ratio vertical scaling ratio

Length .

The following calculated values return a length in the current units of measurement:

For entity type Returns line, arc, circle, polyline, or polygon length any any marker or symbol height of extent width of extent x-coordinate of basepoint arc or circle marker or symbol x-coordinate of centerpoint y-coordinate of basepoint

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Assigning Fields and Values to Entities

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Value

%Y

%Radius

%xRadius

%yRadius

%xStart

%yStart

%xEnd

%yEnd

For entity type arc or circle arc or circle ellipse ellipse line line line line

Returns y-coordinate of centerpoint radius major radius minor radius x-coordinate of startpoint y-coordinate of startpoint x-coordinate of endpoint y-coordinate of endpoint

Angle .

The following calculated values return an angle in the current units of measurement:

Value

%Angle

%Alpha

%Delta

For entity type line, marker, or symbol arc arc

Returns associated angle angle from center to startpoint included angle

Area .

The %Area calculated value returns the area of a polyline or polygon formatted in the current units of measurement to a field with the area type.

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Chapter 27 Storing Data in a Drawing