Current Help System: PC-DMIS Laser (View Core Help)

### Cross Section COPOPER

Pointcloud Operator dialog box - Cross Section Operator

This operation generates a subset of polylines determined by the defined intersection of a set of parallel planes with the cloud of points. The set of planes is defined by the start point, the direction vector, the step distance between the planes and the length.

Note: The Cross Section operator can be evaluated by the profile dimension.

Applying the Cross Section operation to a Pointcloud can be done by clicking the Cross Section Pointcloud button from the Pointcloud toolbar or by selecting the Insert | Pointcloud | Cross Section menu item.

The Cross Section operator uses the following options:

- Start Point - Indicates the coordinates of a point belonging to the first plane cutting the pointcloud. It can be defined by the first and second clicks on the graphics window. In the actual Edit window command, the start point value is held in the START PT parameter.

- Direction - This value indicates the direction of the normal vector. It can be defined by the first click on the graphics window. In the actual Edit window command, the Direction value is held in the NORMAL parameter.

- Step - This value indicates the distance between the planes. In the actual Edit window command, the step value is held in the INCREMENT parameter.

Note: If the Step value is greater than the Length value, then only one section cut will be created at the start point.

- Length - This value indicates the maximum distance between the first and last plane, the length value is held in the LENGTH parameter.

- Delta - This value indicates the maximum distance from the plane for a point to be considered part of the cross section. In the actual Edit window command, the Delta value is held in the TOLERANCE parameter.

- View - Click View to display the points that PC-DMIS will use to generate the cross sections before generating the polyline. Points in the point cloud that will not be used will be hidden. The usable points are displayed within the Graphics Display window.

You may also define some of the Cross Section COPOPER parameters by clicking in the Graphics Display window. This is done simply by clicking and dragging a line that defines the Start Point, Direction vector and Length of the line.

Clicking Create inserts a COPOPER/CROSS SECTION command into the Edit Window like the following example:

COPOPER2 =COPOPER/CROSS SECTION, INCREMENT=10.0, TOLERANCE=0.05, LENGTH = 100

START PT = 0, 0, 0, NORMAL = 1,1,1

REF, COP1,

The Pointcloud Operator dialog box also lets you set these. For INCREMENT, specify the value in the Step box. For LENGTH, specify the value in the Length box. For TOLERANCE, specify the value in the Delta box. For START PT specify the point using START POINT boxes. For NORMAL, specify the vector using the Direction boxes.