Add Calculations - Grid: 2 Point Input

The 2-point input system can be used when the illuminance grid can be positioned parallel to the Cartesian axis - orthogonal grid (facing N, S, E or W). Point grids sloping in the North-South direction (or S-N) and vertical grids created in Elevation view can also utilize the 2-point input.

In Plan View, the grid must be placed from right to left or left to right. The second input point must have different X and Y coordinates than the first.

From the Add menu choose Calculations -Grid-2 Pt. Input, or from the CalculationsToolkit select $image\calc_button-add_grid.jpg$ .
Specify a unique label up to 24 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.
An optional description may be entered up to 80 characters. Meaningful descriptions that include size and color information will be useful when generating schedules.
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. A different text size may be specified, if desired.
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.
Select the light meter type by clicking on the appropriate radio button (and entering the desired values, if necessary). By default, the horizontal meter and grid is selected.
Specify the Summary options to calculate. By default, average, maximum and minimum illuminance are calculated and 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.
Select the display options, including precision, text color, perimeter lines, point markers, meter direction indicators, and labeling.
Specify the Z coordinates of the first and second input points. You will have the option to change these values, if desired, when creating the grid. By default, both values are set to zero.
If desired, specify Isoline contouring and Highlight Values by clicking on the appropriate buttons.
Click OK.
To change the grid 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.
Drag the cursor to the second point on the grid and left click again. By default, the Z coordinate will echo the first corner's elevation. To change the elevation for the second point, before clicking 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.

NOTES:

When placing a 2-pt grid in a vertical plane (Normal meter selected), the order in which the two points are specified will determine the direction the light meter points. As pointed out in the pop-up Hint, if the lower-left corner is clicked first, followed by the upper-right, the meter will be pointing out of the screen, toward the user. If the upper-left corner is clicked first, followed by the lower-right, then the meter will be pointed into the screen, away from the user. After clicking the first point, there will be a tip on the screen as to which way the meter is facing. Pressing F5 on the keyboard will flip the meter to the opposite direction. If the meter is facing into the screen (away from the user) when the second point is clicked, the grid will be created with upside-down question marks in this view, indicating that the meter is facing away from the viewer.
If Meter Indicator is selected (default condition: not selected), there will be a little line extending from the point showing the direction that the light meter is facing to "collect" light.
- 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.