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T-FLEX Parametric CAD. Fundamentals. 2D Design

T-FLEX Parametric CAD. Fundamentals. 2D Design

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<strong>Fundamentals</strong>. Two-Dimensional <strong>Design</strong><br />

Spline Parameters<br />

236<br />

The parameters of a spline created in a Cartesian coordinate system<br />

can be defined or modified via the option.<br />

Type. This parameter defines the spline type (“By polygon”,<br />

“Through nodes”). The type can only be selected at creation time.<br />

Next stands the spline option – “Open” or “Closed”.<br />

Number of segments defines the number of tessellation segments<br />

between two neighboring spline nodes on a plot. This parameter<br />

can be defined by a variable.<br />

Point weight. This item is used in creation of splines by control<br />

polygons. The weight parameter must be greater than zero.<br />

Level, layer and color are defined and used in the same way as in all<br />

the rest construction entities.<br />

A different set of parameters is used for splines defined in polar<br />

coordinates, as follows:<br />

Spiral. With this flag set, a spiral is constructed with the center in the<br />

first point, start in the second point, and the end in the third point.<br />

Without this option, the following two parameters are used:<br />

Tangency at start. Tangency at end. Define the angles from<br />

horizontal of the tangencies in the spline end points.<br />

Level, layer and color are defined and used in the same way as in all<br />

the rest construction entities.<br />

Editing Splines<br />

Editing splines includes changing spline shape, adding or deleting defining nodes and modifying various<br />

parameters.<br />

Spline editing is done in the command “EC: Edit Construction”.<br />

Once a particular spline is selected for editing (by pointing to with the cursor and<br />

clicking ), then the spline curve will be highlighted together with the defining<br />

nodes.<br />

The following options become available in the automenu:<br />

Select the nearest defining node of the spline to modify<br />

Set Spline parameters<br />

Create Name for selected Element (the spline)<br />

Selected Other Element<br />

Delete selected Element(s)<br />

Cancel selection

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