Add Calculations - Polygon

This command allows you to create polygons filled with points for which illuminance values will be calculated. Using the Polygon to place calculation points eliminates the need to remove points from a rectangular grid. Polygons must be specified in Plan view.

Calculation Polygons are used when an irregular calculation grid is desired. Polygons are always horizontal and may be located at any elevation.

To measure Exitance, Diffuse Luminance or Daylight Factor, use the Automatic Placement command to select the surfaces (object or room) for which calculations are desired.

1. From the Add menu choose Calculations - Polygon. or from the Calculations Toolkit select .
2. Specify a unique label up to 32 characters. The default label will be CalcPts_1. Unless changed, subsequent labels will be CalcPts_2, CalcPts_3, etc. If a number is used for the label, subsequent labels will be incremented accordingly.
3. An optional description may be entered up to 80 characters. Meaningful descriptions that include size and color information will be useful when generating schedules.
4. Specify the point spacing from left to right and top to bottom. By default, a point spacing of 10 by 10 is used. As the point spacing changes, the text size adjusts, automatically. You may override the text size, if desired.
5. You may center the measurement points within the grid boundary, if desired, by clicking in the selection box adjacent to Center Points Relative to Grid Boundaries.
6. Select the light meter type. By default, the horizontal meter and grid is selected.
7. Specify the Summary options to calculate. By default, average, maximum and minimum illuminance are displayed along with uniformity ratios (Max/Avg ratio is not selected by default). If Number of Points is selected, the number of points that are in the calculation (not including points that have been removed) are shown.
8. Select the display options, including precision, text color, polygon lines, point markers,meter direction indicators, and labeling.
9. Specify the Z coordinate of the polygon. You will have the option to change this value, if desired, before specifying the first point. By default, this value is set to zero.
10. If desired, specify Isoline contouring and Highlight Values by clicking on the appropriate buttons.
11. Creation Method: Choose whether to manually create boundary lines of polygon or choose an existing line, room or object as the boundary line.
• If manually specifying polygon, the Z coordinate can be prespecified in the dialog.
• If a tilted line, object or room is selected, polygon will be projected down to and created at lowest Z coordinate elevation.
12. Click OK to create the polygon. Follow the steps below depending on the selected creation method:

Specify a Polygon Manually

Create Polygon from Drawing Entity, Room or Object

Locate the first point of the polygon and click the left mouse button. Move the cursor to the second vertex on the polygon and left click again. Continue in this fashion until the polygon is complete. Right click to close the polygon shape. The Polygon grid will be created. To change the polygon elevation, move the cursor into the Z-Coord text box and enter a new value or use the up and down arrow keys on the keyboard, before clicking the first point. Locate the first point of the grid and click the left mouse button.

Locate the pickbox on the drawing entity line, object or room boundary you wish to use and left click. If a valid polygon is found (see Notes below), it will be displayed as a bold line, and the Polygon Search results dialog will appear: Accept Polygon and Repeat - Select another polygon line as a template for another grid with the same properties. Use pickbox to select another closed polygon. Accept Polygon - Create grid using selected entity as polygon boundary. Reselect Entities - Choose this option if invalid polygon was found or if incorrect line was chosen. Use pickbox to select another closed polygon. Manually Specify Polygon - Select vertices manually to specify polygon boundary, right clicking once all vertices are specified. This option is necessary if no valid polygon is found. Cancel - Do not create calculation entity. Notes: Drawing Entity line segments do not need to be joined, just need to be within tolerances (2 decimals of precision - .05) Line segments do not need to make a closed polygon - AGi32 will automatically close boundary line AGi32 filters related lines by color. Caveats: Disconnected line segments or line segments disconnected by gap larger than tolerance level will not form valid polygon. Polygons with intersecting lines will not form valid polygon. Incomplete polygons are not valid, may close in an unacceptable manner.

 

NOTES:

• The meter indicators are "off" by default. They may be turned on by unchecking the appropriate box in the dialog.
• Compatibility with earlier versions: If selected, meter indicators will be displayed in older versions of AGi32 until the calc points are edited.