3D Visualization and Solid Primitive Conceptual Design in AutoCAD

3D Visualization and Solid Primitive Conceptual Modeling in AutoCAD®ConeA cone has a circular or ellipticalbase with edges that converge at asingle point. The cone may betruncated so the top is flat and thecone does not have an apex. Whenthe command is initiated, you are Figure 19. The CONE command on the 3D Make Control Panelprompted for the center point of thecone base or to enter an option. If you pick the center, you must then set the radius of the base.To specify a diameter, enter the Diameter option after specifying the center.The 3P, 2P, and Ttr options are used to define a circular base using either three points onthe circle, two points on the circle, or two points of tangency on the circle and a radius. TheElliptical option is used to create an elliptical base.If the Elliptical option is entered, you are prompted to pick both endpoints of one axis andthen one endpoint of the other axis. If the Center option is entered after the Ellipse option, youare asked to select the center of the ellipse and then pick an endpoint on each of the axes.After the base is defined, you are asked to specify a height. You can enter a height or enterthe 2point, Axis endpoint, or Top radius option. The 2point option is used to set the height bypicking two points on screen. The distance between the points is the height.The Axis endpoint option allows you to orient the cone at any angle, regardless of thecurrent UCS. For example, to place a tapered cutout in the end of a block, first create aconstruction line. Then, locate the cone base and give a coordinate location of the apex, or axisendpoint. You can then use editing commands to subtract the cone from the box to create thetapered hole.The Top radius option allows you to specify the radius of the top of the cone. If this optionis not used, the radius is zero, which creates a pointed cone. Setting the radius to a value otherthan zero produces a frustum cone, or a cone where the top is truncated and does not come toa point.SphereA sphere is a round, smooth object like a baseball or globe. Once the command is initiated,you are prompted for the center of the sphere or to enter an option. If you pick the center, you23