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CreateEquationSpline2 Method (ISketchManager)

Creates an equation-driven 2D explicit or parametric curve or a 3D parametric curve.

.NET Syntax

Visual Basic (Declaration) 
Function CreateEquationSpline2( _
   ByVal XExpression As String, _
   ByVal YExpression As String, _
   ByVal ZExpression As String, _
   ByVal RangeStart As String, _
   ByVal RangeEnd As String, _
   ByVal IsAngleRange As Boolean, _
   ByVal RotationAngle As Double, _
   ByVal XOffset As Double, _
   ByVal YOffset As Double, _
   ByVal LockStart As Boolean, _
   ByVal LockEnd As Boolean _
) As SketchSpline
Visual Basic (Usage) 
Dim instance As ISketchManager
Dim XExpression As String
Dim YExpression As String
Dim ZExpression As String
Dim RangeStart As String
Dim RangeEnd As String
Dim IsAngleRange As Boolean
Dim RotationAngle As Double
Dim XOffset As Double
Dim YOffset As Double
Dim LockStart As Boolean
Dim LockEnd As Boolean
Dim value As SketchSpline
 
value = instance.CreateEquationSpline2(XExpression, YExpression, ZExpression, RangeStart, RangeEnd, IsAngleRange, RotationAngle, XOffset, YOffset, LockStart, LockEnd)
C# 
SketchSpline CreateEquationSpline2( 
   string XExpression,
   string YExpression,
   string ZExpression,
   string RangeStart,
   string RangeEnd,
   bool IsAngleRange,
   double RotationAngle,
   double XOffset,
   double YOffset,
   bool LockStart,
   bool LockEnd
)
C++/CLI 
SketchSpline^ CreateEquationSpline2( 
&   String^ XExpression,
&   String^ YExpression,
&   String^ ZExpression,
&   String^ RangeStart,
&   String^ RangeEnd,
&   bool IsAngleRange,
&   double RotationAngle,
&   double XOffset,
&   double YOffset,
&   bool LockStart,
&   bool LockEnd
) 

Parameters

XExpression
For a parametric curve, equation for x in terms of t; for an explicit curve, an empty string (see Remarks)
YExpression
For a parametric curve, equation for y in terms of t; for an explicit curve, equation for y in terms of x (see Remarks)
ZExpression
Equation for z in terms of t (see Remarks)
RangeStart
Start value for x, if explicit; start value for t, if parametric (see Remarks)
RangeEnd
End value for x, if explicit; start value for t, if parametric (see Remarks)
IsAngleRange
True if the range and x value represent an angle (in radians), false if not (see Remarks)
RotationAngle
Rotation angle (in radians) for the curve (see Remarks)
XOffset
Translation in the x direction of the curve  (see Remarks)
YOffset
Translation in the y direction of the curve (see Remarks)
LockStart
True to lock the start point (RangeStart) of the curve, false to not
LockEnd
True to lock the end point (RangeEnd) of the curve, false to not

Return Value

Equation-driven curve

Example

2D explicit curve:

     A parabola    y = x^2

     CreateEquationSpline2("", "x^2", "", "-5", "5", False, 0, 0, 0, True, True)

 

2D parametric curve:

     A spiral   x = t*sin(t); y = t*cos(t)

     CreateEquationSpline2("t*sin(t)", "t*cos(t)", "", "0", "4*pi", False, 0, 0, 0, True, True)

 

3D parametric curve:

     A helix   x = sin(t); y = cos(t); z = t/5

     CreateEquationSpline2("sin(t), "cos(t)", "t/5", "0", "30", False, 0, 0, 0, True, True)

Example

Remarks

XExpression

If you want:

  • an explicit curve (only in 2D) of the form y=f(x), then this input should be "".
  • a parametric curve given in terms of the parameter t, then this input is the value of x given in terms of the parameter. For example:

    x=sin(t)

YExpression

If you want:

  • an explicit curve (only in 2D) of the form y=f(x), then this input should be a function in terms of x to use to compute the value of y. For example:

    y=exp(x)
  • a parametric curve given in terms of the parameter t, then this input is the value of y given in terms of the parameter. For example:

    y=cos(t)

ZExpression

For 3D parametric curves, this input is the value of z given in terms of parameter t. For example:

z = t


RangeStart and RangeEnd

Strings so that you can input dimension names or pi; for example, "10* width_dimension1" or "-pi/2".

 

XOffset, YOffset, IsAngleRange, and RotationAngle

In general, these parameters are not needed. They are for legacy support only. There are no equivalent 3D variables for positioning in 3D.

 

See Also

Availability

SolidWorks 2010 FCS, Revision Number 18.0


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