What is a Line? Kind, Types and working, command for a Line, Polyline, construction line, Xline, Ray, Spline, Contour and Multiline....

What is a Line? Kind, Types and working of line in AutoCAD...Use of Line Command... What is the command for a Line, Polyline, construction line, Xline, Ray, Spline, Contour and Multiline?

A Line (Definition):

A line may be called as the connection of two points directly in displacement direction. A line consists of minimum two points and maximum any number. If other points are in displacement direction then it will be called as a single line made by multiple number of points while the points are not in displacement direction and angle is changing somewhere then it would be called as combination of lines. A connection between two points linearly is called as a line segment. 

Kind of Lines:-

Straight Line: A straight line is the connection between two points with no angle deformation. A line between a single first point to the end point is called a Straight Line. Only two points are not indispensable for making a straight line but more than two points between first and end point can make a line straight if they are the roots of that particular line. If we draw four lines each perpendicular to other then a Rectangle formation will be formed. To draw a straight line the commands for using is L and then press enter. The difference between a rectangle and the rectangle made by line is that rectangle shape is a single object while four different lines are used to make a rectangle and these are editable separately. 

Continuous line: A line starting from the end point of previously drawn last line is called as Continuous Line. As continuous word indicates its continuity, so a continuous line will not stop to be until the press of “Esc” button or say that until we come out from the command. Continuous line draws the combination of lines with stops in its path. If we click on any element in the drawn structure that particular line segment will select and if we want to change in any line or any part of this continuous line, it is possible. No command is for it and this is not a type of line but a quality of line in AutoCAD. If you are come out from line command and want to continue the drawn line press L again and come in line command and specify the first point of the line be the end point of last drawn line. Then the line will continue from there and hence this quality of line is called as a property of Continuity of a line. Therefore line is a continuous line in AutoCAD.

PolylineIt is a line that draws the combination of different straight lines element in a single object formation and if we click on any element of this structure the entire Polyline object will select. And if we want to change the format of any single element then it is not possible until the explosion. Polyline is used to draw a single poly object directly means to an object combination of straight lines and arcs etc... To draw Polyline type in command window box PL and press enter or use Space Button. Specify the first and other next points and if you wanna start an arc press A enter and its first point would be the end point of recently drawn line segment and other parameters are used to draw now the desired output.

Construction Line:It is also called as X line and use for reference to draft any other structure. Construction line doesn’t have any starting point nor have any end point. To draw X line press XL and enter. X line requires only a single point anywhere on the Drawing Canvas. And when this point is appointed the direction, horizontal, vertical, angle or offsets are selected out as per requirement. The length of construction line is not measurable and having co-ordinates from negative infinity to positive infinity. As a graph shows the light color lines same in AutoCAD Construction Lines are used.

Ray Line: This line is almost similar to construction lines but the difference is that construction line has no starting and no ending point while Ray lines has starting point but no ending point. These Ray lines are also used as reference line and most usable in the drafting where many lines are to be drawn from a single point. As Sun rays come from Sun similarly taking Sun as origin point and rays as ray lines structures are drawn. To draw Ray line press RAY in Command window and enter. Same, in Ray lines a point of origin is appointed first and then the required direction is draft out. The extra part out of the structure can be trimmed out by using Trim Command i.e. TR and then double enter.

Multiline: Multiline is an assembly of multiple parallel lines, such as two parallel lines are going to make the design of a road. To draw multiline press ML and then press enter. It will ask the first point and the other next points where the path is to be drawn. Multiline is also a single object that can be explosive. MLSTYLE is used to change the number and other styles of Multiline. It firstly asks about the first point of the multiline. But the confusion that now if we have four parallel line segments in multiline then on that point which one line would start from it. So justification is used for it. Press J enter for change it after coming in the multiline command. Justification asks you about the Top, Zero and Bottom. For going into the command type the first character for entering in it like enter T for Top, etc... Here top means that the top line in multiple parallel lines would be upon the specified first point. Similarly for zero and bottom the Zero line and the bottom line of the multiline would be upon the specified first point and the element will start from it to design the structure.

Spline: Spline means spherical line or curvic line. A line that connects different points with rounded or sinusoidal corners is called Spline. To draw Spline type SPL and press enter. A spline object is a single object and it will be selected entirely if click on anywhere on the drawn element. So Spline is used to draw a curvic line. A sinusoidal wave can be drawn by Spline. Curves on Roads, Spillways etc...can be shown by Spline. Type otherwise CON and press enter. This command is to make a Contour. Contour is also called as a Spline. So by it to draw a contour over some high or little elevation for showing Spline is also useful.