VisualAnalysis Tutorials: Using Multiple Grids
In this Tutorial we will display features of using multiple grids and Auto-Cut planes to draw the silo model shown on the right.
To draw the body of the structure, we will first modify our default grid.
- Click on the "Grids" Tab.
- Change the X-Spacing to 10ft and the Y-Spacing to 30ft.
- Change the Number of X-Grid Points to 32, and the Y-Grid Points to 2 under the Extents area.
Now we will create a polar grid to match the top of our modified default grid.
- Click on the "Grids" Tab.
- Double Click the "Add or Remove" ellipsis button next to open Grid Manager dialog.
- Click on the Add New Grid drop down arrow and select "Polar" for the new grid type.
- Click Close and you will be returned to the Model View.
- Under the "Grids" Tab of the Project Manager, Polar Grid 1 should now appear. Change the Visibility to "Shown" and the new polar grid will appear.
The grid needs to be adjusted and moved to the top of our other grid.
- In the Location menu of the Grids Tab, change the Y-Location value to 30 ft.
- In the Spacing area of the Grids Tab, change the "R-Spacing" to 10 ft.
- In the Extents area of the Grids Tab, change the "R-Points" value to 1, and the "Sectors" value to 24.
Drawing the Model Skeleton
- Draw the boundary members located along the grid periphery so your Model View looks like the picture below.
- Both Grids may now be turned off to avoid accidentally drawing unwanted members. This is performed by clicking the "Visible" boxes to No under the Grids Tab.
- Hold down the Shift key and click on one of the members to select them all.
- Go to Model | Generate Copies.
- Select "Using a circular pattern" and click Next.
- Enter in (0,0,0) point for the center of rotation.
- Choose The Y axis for the "Rotate parallel to:" option and click Next.
- Choose to make 10 copies. For the spacing between copies, input 18 deg.
- Click Finish. The model should now look like the picture below.
Using Auto-Cut Views to Finish the Model
- Click on the Cut Views Tab of the Project Manager.
- Open up the Y Auto-Cut Planes menu and click the box adjacent to "Y Plane = 39.74 ft."
- In the showing ring of the structure, the top ring may now be sketched.
- Open up the Y Auto-Cut Planes menu and click the box adjacent to "Y Plane = -30.24 ft."
- In the showing ring of the structure, the bottom ring may now be sketched.
Hold down the Shift key and click on one of the bottom ring members to select them all.
Now under the Cut Views Tab, click on the "Show All" box to make the entire model visible.
Go to Model | Generate Copies.
Choose "Using a rectangular pattern" and click Next.
Fill in the dialog box so that we will make 3 copies in the Y, spaced at 20 ft.
The model is now complete.