Straight Lines Only

Use this function to convert an arc (source) into 3D Polyline with a series of straight lines (more break points). The curvature of the converted 3D Polyline with the source can be controlled with the parameter 'Accuracy'.

• The source can be arc/circle/polyline/spiral.

• The line segments of the source will be intact (no additional break points).

• If a line is selected as the source it will be simply changed to 3D Polyline and additional breakpoints will be created depending on the given accuracy.

• The length of the sub-divided straight lines is determined by the radius/parameter (spiral) and accuracy.

• The elevation of the converted 3D Polyline will be the same as that of the source.

Run the function from:

MOUS_ICO Toolbar: Terrain design: {{}} Straight lines only

MOUS_ICO Menu:Terrain > Terrain Design > Straight lines only

This function is also available from the module Road Professional

Working Process

• Select the circle/arc/polyline you want to convert to straight lines. The program accepts only one entity

• Enter the accuracy number (a numeric value) that controls the closeness of the 3D Polyline with that of the source

Accuracy

The degree of accuracy determines the number of elemental straight lines, the source object is to be sub-divided.

0.1 Very low accuracy

0.5 Half accuracy

1.0 Default

2.0 Double accuracy

3.0 Very High accuracy

In most cases, an accuracy of 1.00 is more than sufficient.

• If an accuracy of 1.00 does not give sufficient detail, a higher accuracy level can be specified

• An accuracy of 2.00 subdivides arcs and transition curves into twice as many straight lines as an accuracy of 1.00

• If this value is increased, accuracy is increased and arcs/circles/spirals are subdivided into more straight lines with smaller lengths.

• Smaller accuracy values give less number of lines and the length of the line element will be more

• Large arcs require greater accuracy than small arcs

• The degree of accuracy must therefore be evaluated from case to case

Any value from 0.1 to 3.0 or higher can be used. The accuracy and the deviation from the source are mentioned below when a circle with a radius of 10.0m is converted to straight lines:

Accuracy Maximum Deviation between Radius and Line Segment Line Segment Length

0.5 12.4mm 0.997m

1.0 3.10mm 0.499m

2.0 0.78mm 0.249m

Next topic: Terrain Design