Using an end relation

You can use the End relation option both as a first and last method in the Pattern tab by adding a value specifying the first end relation and last end relation and by that creating a clipping relation where the first and last points of the hull lines are distributed evenly.

MRF first main relation
MRL last main relation
SRF first start relation
SRL last start relation
SPF first start position
SPL last start position
PLXF first point of hull line X
PLXL last point of hull line X
LX hull line X
ERF first end relation
ERL last end relation
EPF first end position
EPL last end position
CR1F clipping relation 1 for first relation
CR1L clipping relation 1 for last relation
CR2F clipping relation 2 for first relation
CR2L clipping relation 2 for last relation

How the system calculates with an end relation

To define first points (or last points) by using an end point, the user has to indicate:

  • An end point (EPF or EPL)
    This end point is defined in the same way as the start positions (SPF) or (SPL)
  • The distance from end-point (DEF ) or (DEL)

To compute the topological hull line points, based on the start distance from start-position and the end distance from end-point the system will generate internally clipping relations:

  1. Start-clipping relation (CR1F) = (SRF)
  2. End-clipping relation (CR2F) = (ERF)

This will define a line segment for first/ last points of the hull lines and will be used internally to generate the definitions of the topological points of the hull lines.

The first/ last points of the hull lines will be defined as percentage points along the line segment between the clipping relations, in the following way:

  1. The first point of the first hull line is a percentage point that is located at user-defined distance from start position.

  2. The first point of the last hull line is a percentage point that is located at user-defined distance from end position.

  3. The percentage values for the rest of the first points is calculated in a way, that all last and first hull line points are equidistant to each other.

Last points are calculated the same as first points by using data defined for last points.

Go to Using an increment and Using an end of main relation to learn about the two other methods in the 'Pattern' tab.