12.1.2. Point Cloud Command

To create multiple points, select Insert > Location > Point Cloud. You can create uniform vector plots independent of the mesh by using the point cloud object. You can also create streamlines that use a point cloud as the locator.

The following characteristics of point clouds will be discussed:


Note:  There are two ways to insert a point cloud:

  • From the menu bar, select Insert > Location > Point Cloud.

  • From the toolbar, select Location > Point Cloud.


12.1.2.1. Point Cloud: Geometry Tab

12.1.2.1.1. Domains

For details, see Domains.

12.1.2.1.2. Method

The options are:

12.1.2.1.3. Definition

The Definition settings apply only when Method is set to From Locations.

12.1.2.1.3.1. Locations

The Locations setting selects the location or locations in which the point cloud is created.


Tip:  Click Location Editor   to open the Location Selector dialog box, which displays the complete list of available locations.


12.1.2.1.3.2. Sampling

The Sampling setting has the following options:

OptionDescription

Equally Spaced

Generates points with roughly the same distance between them.

Rectangular Grid

Generates a rectangular grid of points on the surface. This option should be used only on flat surfaces.

Vertex

Generates the points on the vertices of the mesh. The maximum number of points is the total number of vertices in the mesh.

Face Center

Generates the points at the center of the mesh faces. The maximum number of points is the total number of faces in the mesh.

Free Edge

Generates the points on the outer edge at the center of the edge segments.

Random

Generates the points randomly. If the seed is positive, the point distribution can be reproduced.

12.1.2.1.3.3. # of Points

# of Points is available only when either the Equally Spaced or Random option is selected. The # of Points setting specifies the number of equally spaced points you want generated on the surface of the mesh.

For the Equally Spaced option, the actual number of points generated is guided by the provided # of Points but may not be exactly equal to this.

12.1.2.1.3.4. Spacing

Spacing is available only when the Rectangular Grid option is selected. The Spacing setting specifies a value that represents a fraction of the maximum domain extent. For example, if your domain has a maximum extent of 1 [m] and a Spacing of 0.1 was used, a rectangular grid with 0.1 [m] spacing would be created.

12.1.2.1.3.5. Aspect Ratio

Aspect Ratio is available only when the Rectangular Grid option is selected. The Aspect Ratio setting stretches the rectangle in a direction parallel to the grid axes. If a value less than one is entered, the grid will be stretched in one direction. If a value greater than one is entered, the grid will be stretched in the direction perpendicular to the previous direction.

12.1.2.1.3.6. Grid Angle

Grid Angle is available only when the Rectangular Grid option is selected. The Grid Angle setting specifies the magnitude and direction of grid rotation.

12.1.2.1.3.7. Reduction

Reduction is available only when the Vertex, Face Center, or Free Edge options are selected. The Reduction setting has the following options:

OptionDescription

Max Number of Points

Enables the option to specify the maximum number of points allowed to be plotted.

Reduction Factor

Enables the option to specify a reduction factor from the full number of points.
12.1.2.1.3.8. Max Points

Max Points is available only if the Max Number of Points option is selected. The Max Points setting specifies a value for the maximum number of points allowed. If the maximum number of vertices is greater than that of the specified value, then the points taken will be randomly selected.

12.1.2.1.3.9. Factor

Factor is available only if the Reduction Factor option is selected. The Factor setting specifies a value by which to decrease the total number of points in the Point Cloud object. The final number of vectors is total/n, where total is the total number of seeds, and n is the reduction value entered into the box.

12.1.2.1.3.10. Seed

Seed is available only if the Random option is selected. The Seed setting generates a different set of random points for each value entered. The distribution cannot be replicated or reproduced for negative seed values. For negative seed values, the random series is based on the system time. Different compilers may generate different distributions for the same positive seed value.


Note:  Similar sampling options are also available directly on Vector and Streamline objects.


12.1.2.2. Point Cloud: Color Tab

The color settings can be changed on the Color tab. For details, see Color Tab.

12.1.2.3. Point Cloud: Symbol Tab

For details, see Point: Symbol Tab.

12.1.2.4. Point Cloud: Render Tab

The rendering settings can be changed by clicking the Render tab. For details, see Render Tab.

12.1.2.5. Point Cloud: View Tab

The View tab is used for creating or applying predefined Instance Transforms for a wide variety of objects.

For details on changing the view settings, see View Tab.