Firstly, the workspace view is changed to three-dimensional view, such as southeast isometric view, and the concept of visual style display is selected, and the desktop with the length and width of 1200mm and the height of 40mm is drawn by box command.
Then use the box command to draw a foot 60mm long, 60mm wide and -800mm high (downward) from the top left corner of the desktop (near the origin of coordinates).
Third, the ar command, press the Enter key, and the object clicks on the leg of the newly drawn table. The array type is the default polar axis, and then press enter. The center of the array is the center of the desktop. For details, please hold down shift+ right mouse button, select "midpoint between two points" and click on two diagonal points on the desktop respectively. At this time, the following array modification table screen will pop up.
Change the number of items from the default of 6 to 4, and then press enter.
In order to strengthen the firmness of the table, four horizontal bars were added under the table to fix it.
Click the icon of the coordinate axis with the mouse, pause at the coordinate origin, and select "Move Origin Only" in the pop-up menu to move the coordinate origin to the vertex of the left front corner of the desktop.
Rec command, starting from the coordinate origin and ending at the diagonal point of the origin, draw a square the size of a desktop on the desktop. Then use the O offset command to shift the square inward by 60 to get the square ring below.
Hide the three-dimensional desktop and legs (specifically, select the three-dimensional entity of the desktop and legs, right click/isolate the object/hide the object), and get the following figure (only keep the square circle).
Ur command (or presspull), put the mouse in any narrow area between the two white lines of the circle, click the left mouse button when the circle becomes a dotted line, then enter -60 (minus sign means downward stretching), and press Enter to get four horizontal bar entities.
Select the horizontal bar entity and a mobile control will appear. Click the selected vertical moving axis with the mouse, pull it down for a certain distance, enter 200, and press enter.
Enter unh command (or unhide) and press Enter to get all entity drawings.
Then use the X command to explode the table leg array, use the uni command to merge all the entities into a whole, and delete the square ring line on the desktop to get the following figure.
Change the visual style to Wireframe and the model view to Parallel (you can click the view control and visual style control in the upper left corner of the workspace).
Click Visual Style Control/Visual Style Manager (or directly enter the vis command). In the visual style manager that appears, click "Wireframe" (the penultimate one), and then change the color and line type under the occlusion edge to magenta and dot respectively to get the following figure.
The above is a wireframe diagram of a three-dimensional square table. If you want to turn a three-dimensional diagram into a plane, you can use fl command (full name flat) or fsh command (full name flatshot) to complete it.
The fl command gets the white wireframe plane in the southeast isometric view.
Fsh can also be obtained by setting the dark line color to red and the line type to dotted line (both scales are 1 and the rotation angle is 45 degrees).
The same is true for the three-dimensional or plane wireframe of tables with other shapes.