The Equation Driven Curve tool lets you create a curve by defining the equation for that curve.
To open this PropertyManager:
Select an existing equation driven curve or create a new one (for example,
by clicking Equation Driven Curve
tool (Sketch toolbar) or ).
When you create equation driven curves, the values you use must be in
radians.
You can use global variables for equation driven curves using double quotes
(not with
an
equal
sign).
Existing Relations
If you select an existing
curve:
 |
Displays relations inferenced automatically
during sketching or created manually with Add
Relations. When you select a relation in the
list, a callout is highlighted in the graphics.
|
 |
Displays the status of the selected sketch
entity (Fully Defined, Under Defined, and so on). |
Add Relations
If you select an existing curve, you can add relations to the selected
entity. The list includes only relations that are possible for the selected entity.
Options
If you select an existing curve, click For
construction to convert the entity to construction geometry.
Equation Type
| Explicit |
Lets you define X values for the start and
endpoints of the range. Y values are calculated along the range of X
values. |
| Parametric |
Lets you define T values for the start and
endpoints of the range. You can define an equation for X values and another
equation for Y values. Both equations are solved along the range of T values. Only parametric curves are available in 3D sketches.
|
Parameters
You can specify any appropriate combination of the following parameters to
define the curve if the curve is not constrained by
relations.
| Equation |
 (explicit equations) |
Define the curve equation, where
Y is a function of X. Or, define the curve equation, where X, Y, and Z are
functions of T. Z is for 3D sketches only. If you type an
equation that cannot be solved or has incorrect syntax, the equation appears in
red.
You can use any functions supported in the
Equations dialog box. For example, you
can build complex equations like this:
2*(x + 3*sin(x))
You can also use feature dimensions in equations. For
example:
x^3/"D1@Sketch5"
|
 ,
 , and
 (parametric equations) |
| Parameters |
 and
 (explicit
equations) |
Specify the range of values for
1, where 1 is the starting
point and 2 is the ending point (for example, X1 = 0 and X2 = 2*pi).Click
 to lock or
unlock the start or end point location on the curve:
- (locked):
The starting or ending point is fixed.
-
(unlocked): You can drag the starting or ending point along the curve.
|
 and
 (parametric equations) |