The Parameters Manager
displays dimensional constraint parameters (both dynamic constraints
and annotational constraints), reference parameters, and user variables.
You
can easily create, modify, and delete parameters from the Parameters Manager.
The Parameters Manager
supports the following operations:
- Click the name of a dimensional constraint
parameter to highlight the constraint in the drawing.
- Double-click a name or expression to
edit it.
- Right-click and click Delete to remove
a dimensional constraint parameter or user variable.
- Click a column heading to sort the list
of parameters by name, expression, or value.
Use Operators in Expressions
Dimensional
constraint parameters and user variables support the following operators
within expressions:
| Operator |
Description |
| + |
Addition |
-
|
Subtraction or unary negation |
%
|
Floating point modulo |
| * |
Multiplication
|
| / |
Division |
| ^ |
Exponentiation |
| ( ) |
Parenthesis, expression delimiter |
.
|
Decimal separator |
NoteWith imperial units,
the Parameters Manager interprets a minus or a dash (-) as a unit
separator rather than a subtraction operation. To specify subtraction, include
at least one space before or after the minus sign. For example,
to subtract 9" from 5', enter 5' -9" rather
than 5'-9".
Understand Precedence in
Expressions
Expressions are evaluated
according to the following standard mathematical rules of precedence:
- Expressions in parentheses first, starting
with the innermost set
- Operators in standard order: (1) unary
negation, (2) exponents, (3) multiplication and division, and (4)
addition and subtraction
- Operators of equal precedence from left
to right
Functions Supported in
Expressions
The
following functions are available for use in expressions:
| Function |
Syntax |
| Cosine |
cos(expression)
|
| Sine |
sin(expression)
|
| Tangent |
tan(expression)
|
| Arc cosine |
acos(expression)
|
| Arc sine |
asin(expression)
|
| Arc tangent |
atan(expression)
|
| Hyperbolic cosine |
cosh(expression)
|
| Hyperbolic sine |
sinh(expression)
|
| Hyperbolic tangent |
tanh(expression)
|
| Arc hyperbolic cosine |
acosh(expression)
|
| Arc hyperbolic sine |
asinh(expression)
|
| Arc hyperbolic tangent |
atanh(expression)
|
| Square root |
sqrt(expression)
|
| Signum function (-1,0,1) |
sign(expression)
|
| Round to nearest integer |
round(expression)
|
| Truncate decimal |
trunc(expression)
|
| Round down |
floor(expression)
|
| Round up |
ceil(expression)
|
| Absolute value |
abs(expression)
|
| Largest element in array |
max(expression1;expression2)
|
| Smallest element in array |
min(expression1;expression2)
|
| Degrees to radians |
d2r(expression)
|
| Radians to degrees |
r2d(expression)
|
| Logarithm, base e |
ln(expression)
|
| Logarithm, base 10 |
log(expression)
|
| Exponent, base e |
exp(expression)
|
| Exponent, base 10 |
exp10(expression)
|
| Power function |
pow(expression1;expression2)
|
| Random decimal, 0-1 |
Random |
In addition to these
functions, the constants Pi and e are also available
for use in expressions.
To reference a variable
within an expression
- Click Parametric tab
Manage
panel Parameters
Manager. 
- Double-click the variable you want to
reference.
- Right-click the cell in the Name column,
and click Copy.
- Double-click the Expression column where
you want to include the referenced variable.
- Right-click the Expression column, and
click Paste.
To include a function in
an expression
- Click Parametric tab Manage
panel Parameters
Manager.
- Double-click the Expression column of
the variable to which you want to add the function.
- Right-click the Expression column, and
click Expressions.
- Select the function to insert it in the
Expression column.
To modify a user parameter
To select a constrained
object associated with a user parameter
- Click Parametric tab Manage
panel Parameters
Manager.
- Click the dimensional variable to view
the associated object in the drawing.
CommandsDIMCONSTRAINT
Applies dimensional
constraints to selected objects or points on objects, or converts
associative dimensions to dimensional constraints.
PARAMETERS
Controls the associative
parameters used in the drawing.
-PARAMETERS
Controls the associative
parameters used in the drawing.
