Rahul Rana

AutoCAD is a 2-D and 3-D computer-aided drafting software application used in architecture, construction, and manufacturing to assist in the preparation of blueprints and other engineering plans. Professionals who use AutoCAD are often referred to as drafters. Training in AutoCAD software and computer-aided drafting can be found at technical and community colleges, including certificate or associate degree programs in AutoCAD, drafting, or engineering technology. Most of these programs feature courses that focus on the hands-on use of the AutoCAD software package. Some programs may even prepare students for AutoCAD industry certification. Bachelor's degree programs in related fields, such as engineering, may also require students to take AutoCAD courses. Basic drawing tools Point Creates a symbol on the drawing that is tied to a specific point. It is defined by coordinates (x,y,z). It is not necessary to create points when you want to draw other geometric entities. Construction line tools Ray = A line with a defined starting point with infinite length at a specified slope. Xline = An infinite line with no start or end point at a specified slope. Base point can be snapped with middle point snap mode. Shortcut "xl" Polyline Polylines are the main business of most drawings. A polyline is made of numerous lines/arcs/or both segmented together into one selectable object. Polylines are quite versatile and the P (Polyline) command can be used to access & many of the features associated with them. Shortcut "pl" Polygon Polygons are regular, multisided shapes such as pentagons, hexagons etc. When this tool is employed, AutoCAD requests the number of sides desired and then asks whether the shape is to be defined as sitting on a circle of specified radius, or by the length of a side. The objects created from this command become "Closed Polylines" and can be ed using P . Rectangle This is a quick way of drawing a four-segment polyline with four right angles. Shortcut "rec". Arc An arc is a circle segment. When using this tool the user can define the arc by selecting three points through which AutoCAD will generate an arc, or alternatively the user can define a center point, a radius and a range of degrees to fill. Circle The only variables here are radius and centre point. Shortcut "c" Spline Splines are a particular form of curve generated by specific mathematical equations. The user can select as many vertices as they wish, and AutoCAD will generate a spline curve that incorporates all these points. Splines are generally used for cosmetic purposes, as their mathematical complexity makes them hard to define from a technical design perspective. Shortcut "spl" Ellipse Basically an oval. Similar to a circle, except ellipses require a radius to be defined for both their vertical and horizontal components. Shortcut "el" Hatch Hatches are area fills. They can be made up of a solid colour, a gradient (in later versions of AutoCAD) or more usually a specific pattern. Hatches can be applied to a particular object such as a looped polyline, or any enclosed area. They can be (and usually should be) defined as being "associative" which means that if the area in which they are contained is adjusted, the hatching will update automatically. Text Inserts a text string into the drawing. AutoCAD uses two forms of text entry, single line and multiline. These are known respectively as DTEXT and MTEXT. DTEXT is very much a leftover from AutoCAD's early years and there is no real justification for using it's very basic system when the MTEXT option has features similar to a conventional text or.you may also select command TEXT for undefined area.