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Setting the function for coordinates of a curve point |
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To set the function for a curve point, use the Law by <coordinate name> group of controls on the Parameter Panel. The set of coordinates (X,Y,Z, R,A,Z or R,A,B) depends on the selected type of coordinates. For example, if you plot a curve using a cylindrical coordinate system, you need to define the functions for R, A, Z coordinates.
Set the function type and the corresponding parameters for the selected coordinate. To do this, click the corresponding button in the Function Type group, , see the table.
Setting function parameters for coordinates of a curve point
Function Type |
Setting function parameters for coordinates of a curve point |
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By expression |
The coordinate function is defined by a parametric equation. Enter the function expression to determine the coordinate in the Expression field. More details on Entering the Expression... For an interval parameter, set the name in the Parameter field, and the variation interval in the Spacing field. More details on setting interval parameter... |
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Constant |
The coordinate is defined by a constant value. Enter the coordinate value in the Value field. |
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Linear |
The coordinate function is defined by a linear equation. Set the start and the end values of the coordinate in the corresponding fields on the Parameter Toolbar. |
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Cubic |
The coordinate function is defined by a cubic equation. Set the start and the end values of the coordinate in the corresponding fields on the Parameter Toolbar. |
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You can use constants to set the coordinates of a point (See Table Constants Add-Ons Operators, functions and constants). For Constant, Linear, and Cubic functions, after you enter the constant and press the <Enter> key, the designation of the constant in the coordinate field will be replaced with its value. For the By expression function, the value of the entered constant is used for calculating the coordinate using the specified function expression. |
To complete the command, the software remembers the data entered for each function type. You can toggle between these function types without losing these data.
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A curve cannot be plotted if all the coordinates of the curve points have the Constant type. In this case, a warning is displayed, saying that at least one coordinate function should not be constant. |
