Lines and Polygons

The Line and Polygon drop-downs (Create tab > Draw group) provide tools for drawing lines and shapes in the project, by different methods.

A line consists of one or more straight line segments between selected points.

Polygons are closed lines or loops used to define boundaries, consisting of three or more straight line segments between selected points. Use polygons to define areas of interest for modelling, filtering, and cropping data. You can draw irregular polygons, rectangles, or circles.

PointStudio saves the resultant lines and polygons in the cad container.

Line and Polygon

Draw lines or polygons in 3D space with either the Line tool (F9) or the Polygon tool (F10). Expand below for instructions.

2D Line and 2D Polygon

The 2D Line and 2D Polygon tools enable you to draw lines and shapes on the action plane. The action plane assists in determining line placement in 3D space. Expand below for instructions.

Smart Line and Polygon

The Smart Line (F8) and Smart Polygon tools enable you to create lines and shapes that track along edges of data.

The smart line and polygon tools to behave differently with different data types. For example:

  • When tracking along triangulations, the line tracks along physical edges in the surface. This is useful when extracting toes and crests.

  • For coloured scan data, the line tracks coloured edges and extracts geological boundaries.

Tip:  Colour the scan non-uniformly before creating smart lines to improve edge selection.

Note:  On scans with photographic data , you can use the photographic data to create smart lines with greater detail. See Create an image-tracking smart line or polygon below for instructions.

Primitive-tracking smart lines (left) and an image-tracking smart line (right)

Primitive-tracking smart polygon (left) and an image-tracking smart polygon (right)

Freehand Line and Polygon

The Freehand Line and Freehand Polygon tools enable you to draw lines and shapes anywhere in 3D space along the path of the moving mouse.

Note:  Where the mouse moves over an object, the freehand line or polygon is drawn on the object. Where it moves over empty space, the line or polygon is drawn on the action plane.

Rectangle

The Rectangle tool (Alt+[) enables you to draw a rectangle anywhere on the action plane.

To draw a rectangle , follow these steps:

  1. On the Create tab, in the Draw group, select Rectangle from the Polygon drop-down list.

    The Create Rectangle tool panel will appear. The panel allows manual input of corner coordinates.

  2. From the Creation mode drop-down list, select from the following and draw the rectangle:

    • Opposite points on plane: Select two points as opposite corners. The rectangle will be drawn between these, with its sides aligned with the axes.

    • Three points: Select two points to define adjacent corners and a third to define the length of the perpendicular sides. The fourth side is added automatically.

    • Opposite points and direction: Select points as opposite corners. Move the mouse around and click to set the rectangle's orientation.

    Note:  Opposite points on plane always creates rectangles on the action plane. Set up the action plane in the required position and orientation before drawing the rectangle.

  3. Click Apply to continue creating rectangles or OK to accept and exit the tool.

Note:  After you finish the rectangle and exit the tool, the rectangle is detached from the action plane. You can move it as required anywhere in 3D space.

Circle

The Circle tool (Alt+0) enables you to draw a circle anywhere on the action plane.

To draw a circle , follow these steps:

  1. On the Create tab, in the Draw group, select Circle from the Polygon drop-down list..

    The Create Circle tool panel appears.

  2. From the drop-down list, select a Creation mode, and proceed accordingly:

    • Centre and radius points: Select two points. The first will be the centre, the second will set the radius.

    • Opposite diameter points: Select two points on the circumference. The mid-point between them will be the centre.

    • Three radius points: Select three points. The circle will be drawn through all three.

    • Two points and radius: Select two points on the circumference and the enter the radius. You can use the mouse to set the radius.

    • Within triangle: Select three points to define a triangle. The circle is drawn inside the triangle, touching all three sides.

    • Within square: Select two points to define the size and orientation of a square. The circle will be drawn inside the triangle, touching all four sides.

    • Within rectangle: Select two points to define the size and orientation of a rectangle. The circle will be drawn inside the rectangle, touching the middle of the two longer sides.

    Note:  Centre and radius points and Opposite diameter points always create circles on the action plane. Set up the action plane in the required position and orientation before drawing the circle.

  3. Click Apply to continue creating circles or OK to accept and exit the tool.

Note:  After you finish the circle and exit the tool, the circle is detached from the action plane. You can move it as required anywhere in 3D space.

Tip:  Create circles while in action plane top view , or use snap modes to ensure the circles are created in the intended locations. See Snap Modes.