Point Moved along Curve

This function creates a point by movement of another point along a curve. The base object, that means, the object defining the starting point, may be either a point itself or a curve. In the latter case, the starting point is defined by either of the end points of the curve. If the base object is a point, the point must rely on a curve in its definition. This means that only points of the following types are allowed:

• Point at the intersection between a curve and a plane

• Point at the intersection between two curves

• Another point moved along a curve

Any point or curve already selected will be used as a base object, which means that points can be moved along several curves in a single operation. If there are no valid base objects selected (curves or points of any of the abovementioned types), you will be asked to define or select one or more.

When the base objects have been defined, the following form is shown:

Figure 2:24. Form for creation and modification of a moved point.

Depending on whether the base object is a curve or a point, the form will look slightly different. If the base object is a curve, the form will look exactly as above. If the base object is a point, "From end" will be replaced by "Direction".

The Distance field: Distance to move from the starting point. This distance is measured along the curve. If a point has been selected as base object, the new point will be moved along the curve used in the definition of the base point. If the starting point is defined by the intersection between two curves, the new point will be moved along the first of the two curves, that means, the one that was picked first when the starting point once was created. Several distances may be specified at once with a repetition term on the form <first distance>(<spacing>)<last distance>. For example, entering "1000(2000)5000" (without quotes) in the Distance field will create new points at the distances 1000, 3000 and 5000 millimeters from the base point.

The From end/Direction field: If the base object is a curve, this field specifies which of the end points to start moving from. Otherwise, the field specifies in which direction the base point will be moved.

The Apply button: Create one or more points with the given input, but keep the form open. This is practical if several points are to be created at irregular distances. This button is displayed only when creating new points.

The Ok button: Accept the input and create new points or modify an existing one according to the input.

The Cancel button: Exit the function without creating or modifying any point.