Subject: Applying elevation and thickness



By default, the program creates new two-dimensional entities with a zero elevation and thickness. The easiest way to create a three-dimensional entity is to change the elevation or thickness property of an existing two-dimensional entity.        

The elevation of an entity is its z-coordinate position in relation to the xy plane in which the entity is drawn. An elevation of 0 indicates that the entity is drawn on the xy plane of the current UCS. Positive elevations are above this plane; negative eleva­tions are below it.    

The thickness of an entity is the distance it is extruded above or below its elevation. A positive thickness extrudes the entity upward in the positive z direction of the entity; a negative thickness extrudes it downward in the negative z direction. The thickness is applied uniformly to the entire entity. You can extrude any two-dimensional entity into a three-dimensional entity by changing the thickness of the entity to a nonzero value. For example, a circle becomes a cylinder, a line becomes a three-dimensional plane, and a rectangle becomes a box.     

 

Two-dimensional entities.

 

Two-dimensional entities with thickness added.

You can create three-dimensional entities using any of the following methods:

   Draw two-dimensional entities in three-dimensional space.    

   Convert two-dimensional planar entities into three-dimensional entities by apply­ing elevation and thickness.

   Convert two-dimensional planar entities into three-dimensional entities by revolv­ing or extruding.

   Create three-dimensional entities such as boxes, cylinders, cones, domes, spheres, and wedges.

Three-dimensional solids are drawn as true solids with versions of CADdirect that support three-dimensional ACIS solids.
Three-dimensional solids that you can create include: box, cone, cylinder, dish, dome, pyramid, sphere, torus, and wedge.

You can change the default elevation and thickness values to create new entities with an elevation and thickness already applied.

To set the current elevation    

   1   Do one of the following to choose Elevation ():

   On the ribbon, choose Draw > Elevation (in Settings).

   On the menu, choose Format > Elevation.

   On the Format toolbar, click the Elevation tool.

   Type elev and then press Enter.

   2   Specify the New Current Value For Elevation, and then press Enter.

To set the current thickness    

   1   Do one of the following to choose Thickness ():

   On the ribbon, choose Draw > Thickness (in Settings).

   On the menu, choose Format > Thickness.

   On the Format toolbar, click the Thickness tool.

   Type thickness and then press Enter.

   2   Specify the New Current Value For Thickness, and then press Enter.

To set the current elevation and thickness using a dialog box    

   1   Do one of the following to choose Drawing Settings ():

   On the ribbon, choose Application button > Drawing Utilities; Home > Drawing Settings (in Utilities); or Tools > Drawing Settings (in Manage).

   On the menu, choose Tools > Drawing Settings.

   On the Tools toolbar, click the Drawing Settings tool.

   Type dsettings and then press Enter.

   2   Click the 3D Settings tab.

   3   Click the Surfaces tab.

   4   To change the current thickness, in the Current 3D Thickness box, type a new thickness value or click the arrows to select a new thickness.

   5   To change the current elevation, in the Current 3D Elevation box, type a new ele­vation value or click the arrows to select a new elevation.

   6   Click OK.

To change the thickness and elevation of an existing entity    

   1   Do one of the following to choose Properties ():

   On the ribbon, choose the Application button then choose Options, or choose Tools > Options (in Manage).

   On the menu, choose Modify > Properties.

   On the Modify toolbar, click the Properties tool.

   Type entprop and then press Enter.

   2   Select the entity, and then press Enter.

CADdirect displays the Properties palette (its exact appearance depends on the type of entity you select).

   3   To change the thickness, in the Thickness box, type a new thickness value or click the arrows to select the new thickness.

   4   To change the elevation, in the Z coordinate box (or some entities have an Eleva­tion box), type a new elevation value or click the arrows to select the new eleva­tion.    

   5   Click OK.

When you change the thickness of an entity, you do not change the entity type.
If you want to extrude an entity and convert it to a three-dimensional solid, use the Extrude command. If you want to thicken a surface or mesh entity and convert it to a three-dimensional solid, use the Thicken command.    

Applying_elevation_and_thickness
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