VS3D / VScad3 User's Guide

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Guided Tour

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VScad3 Geometric Entities

2.4.3 Polyline mode.

This mode is used for placing Polylines in the model. Polylines can be drawn by clicking the left mouse button in a geometry view. The exact creation sequence depends upon the type of polyline being created. When entering points, it is possible to switch to "View" mode and pan/zoom/rotate the view, and then go back to Polyline mode and complete the polyline in progress. For curved polylines ("Circle", "Arc", and "Spline"), the current attribute setting for "Facets" will determine the smoothness of the curve. The higher the number of facets, the smoother the curve. The "Facets" setting (as well as the default entity color) can be accessed via the main "Resources / Attributes..." menu.

"Type" : Use this list to select the type of polyline to create:
"Freehand" : Click the left mouse button in a point-to-point fashion to enter polyline segments. Click the right mouse button to finish. If the perimeter mode is "Closed", then the polyline perimeter will be closed automatically.
"Rectangle" : Click the left mouse button to enter the first corner position. Then click the left mouse button again to enter the opposite corner. The rectangle is then closed (and constructed) automatically.
"Circle (Diameter)" : Click the left mouse button to enter the first diameter position. Then click the left mouse button again to enter the opposite end of the circle diameter. The circle is then closed (and constructed) automatically.
"Circle (Radius)" : Click the left mouse button to enter the circle center point. Then click the left mouse button again to enter the radius end. The circle is then closed (and constructed) automatically.
"Circle (3 Point)" : Click the left mouse button three times to enter the points. A circle is then automatically constructed such that it passes through the three points. The three points can not be collinear (in a straight line).
"Arc (2 Radii)" : Click the left mouse button to enter the arc (circle) center point. Click the left mouse button to enter the first radius point (this will determine the radius of the arc). Click the left mouse button a third time to enter the second radius point (this will determine the sweep angle of the arc counter-clockwise).
"Arc (3 Point)" : Click the left mouse button three times to enter the points for an arc to pass through (in a counter-clockwise direction). The three points can not be collinear (in a straight line).
"Spline" : This is similar to "Freehand" mode, except that a smooth spline curve will be fitted to the points instead of straight line segments. The spline curve will replace the straight line segments when the right mouse button is clicked to finish the spline. If the "Closed" perimeter mode is set, then the resulting spline perimeter will be closed. Best results are obtained when the number of spline points is small, but greater than three.

"Z Plane" : This specifies the Z coordinate at which to place the polyline coordinates when the left mouse button is clicked in a view.

"Closed | Open" : This controls whether the polyline perimeter is automatically closed when the right mouse button is clicked to finish. This setting only applies to the "Freehand" and "Spline" polyline types.

2.4.3 A

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