Ellipses are also non-uniform curves, but they have a regular shape.
They are actually splines created in a regular closed shape. In AutoCAD
2020, you can draw an ellipse in three different ways by using the tools
available in the Ellipse drop-down of the Draw panel. The three
different ways to draw ellipses are explained in this AutoCAD 2020
tutorial video.
splinedit command Modifies the data that defines a spline, such as a
number and weight of control vertices, the fit tolerance, and the
starting and ending tangents.
Note: SPLINEDIT automatically
converts spline-fit polylines to splines even if you immediately exit
SPLINEDIT after selecting the spline-fit polyline.
The data that
defines a spline is represented in one of two formats: as a control
frame or as fit points. The format can change depending on how the
spline was originally created, the options selected from the grip menus,
or the options used in SPLINEDIT.
You can change any of following data:
-
Control frame data consists of control vertices, the polynomial degree
of the spline, and the weights assigned to each control vertex.
- Fit data consists of fit points, knot parameterization, the fit tolerance, and the tangents at the endpoints of the spline.
Note:
Switching from displaying control vertices to fit points automatically
changes the selected spline to degree 3. Splines originally created
using higher-degree equations will likely change shape as a result. In
addition, if the spline was created using a positive tolerance value,
the fit points will be relocated to the knots on the spline, and the
tolerance value is reset to 0.
Splines are non-uniform curves, which are used to create irregular
shapes. In AutoCAD, you can create splines by using two methods: Spline
Fit and Spline CV. These methods are explained in this AutoCAD 2018
tutorial.
A spline is a smooth curve that passes through or near a set of points that influence the shape of the curve.
By
default, a spline is a series of blended curve segments of degree 3
(also called cubic) polynomials. These curves are technically called
nonuniform rational B-splines (NURBS) but are referred to as splines for
simplicity. Cubic splines are the most common and mimic the splines
that are created manually using flexible strips that are shaped by
weights at data points. SPLINE creates curves called nonuniform rational B-splines (NURBS), referred to as splines for simplicity.
Splines
are defined either with fit points or with control vertices. By
default, fit points coincide with the spline, while control vertices
define a control frame. Control frames provide a convenient method to
shape the spline. Each method has its advantages. To display or hide
the control vertices and control frame, select or deselect the spline,
or use CVSHOW and CVHIDE. However, for splines created with control
vertices in AutoCAD LT, you can display the control frame only by
selecting the spline.
The prompts differ, depending on whether you choose Fit or CV (control vertices) as the creation method (Method option).
• Understand Control Vertices (spline cv) and Fit Points (spline fit):
You
can create or edit splines using either control vertices, or fit
points. The spline on the left displays control vertices along a control
polygon, and the spline on the right displays fit points. Use the
triangular grip on a selected spline to switch between displaying
control vertices and displaying fit points. You can use the round and
square grips to modify a selected spline.
A Polygon is a single object having many sides ranging from 3 to 1024.
In AutoCAD, you can create regular polygons having sides with equal
length. There are two methods to create a polygon. These methods are
explained in the video.
Topic covered in the video are as follows: 1) create a polygon by specifying the number of sides, and then specifying the length of one side. 2)
create a polygon by specifying the number of sides, and drawing an
imaginary circle (inscribed circle). The polygon will be created with
its corners located on the imaginary circle. You can also create a
polygon with the circumscribed circle. A circumscribed circle is an
imaginary circle which is tangent to all the sides of a polygon.
I have drawn one triangle, rectangle and pentagonal to explain in this video.
if you want to learn how to draw a rectangle in AutoCAD 2018 then you
came to the right place because this video will show you how to use
rectangle command in autocad.
A rectangle is a four sided single
object. You can create a rectangle by just specifying its two diagonal
corners. However, there are various methods to create a rectangle.
covered topics are as follows: - how to find an area in Autocad drawing - Draw Rectangle by Area - draw a rectangle in AutoCAD with dimensions. - how to use AutoCAD fillet radius for Rectangle. - chamfer command in AutoCAD for Rectangle. - draw a rectangle in AutoCAD with an angle. (rectangle rotation formula) - change the width of a rectangle in AutoCAD.
if you want to Modify and Edit Polylines in AutoCAD then you came to right place because this video will show you how to edit polyline in autocad by using polyline edit command in autocad.
covered topics in this video are as follows: - join polylines autocad by using autocad join command - create closed polyline in autocad - edit polyline width - autocad polyline edit vertex - convert polyline to arc in autocad - convert polyline to spline - autocad convert arc to straight lines with autocad decurve polyline command - break a polyline in autocad - move polyline
if you are looking for autocad polyline tutorial and polyline autocad
shortcut then you came to right place because in this video, you will
learn all about polyline autocad command.
A Polyline is a single
object that consists of line segments and arcs. It is more versatile
than a line as you can assign a width to it.
if you want to learn how to use arc command in autocad 2018 then you
came to the right place because in this video shown how to draw arcs in
autocad 2018.
you can
Create arcs by specifying various combinations of center, endpoint,
start point, radius, angle, chord length, and direction values.
Arcs are drawn in a counterclockwise direction by default. Hold down the Ctrl key as you drag to draw in a clockwise direction.
"Methods to create arcs in autocad" :-
Draw Arcs by Specifying Three Points: You can create an arc by specifying three points.
Draw Arcs by Specifying Start, Center, End: You can create an arc using a start point, center, and a third point that determines the endpoint.
The
distance between the start point and the center determines the radius.
The endpoint is determined by a line from the center that passes through
the third point.
Draw Arcs by Specifying Start, Center, Angle: You can create an arc using a start point, center, and an included angle.
The
distance between the start point and the center determines the radius.
The other end of the arc is determined by specifying an included angle
that uses the center of the arc as the vertex.
Using different options, you can specify either the start point first or the center point first.
The
included angle determines the endpoint of the arc. Use the Start, End,
Angle method when you know both endpoints but cannot snap to a center
point.
Draw Arcs by Specifying Start, Center, Length: You can create an arc using a start point, center, and the length of a chord.
The
distance between the start point and the center determines the radius.
The other end of the arc is determined by specifying the length of a
chord between the start point and the endpoint of the arc.
Using different options, you can specify either the start point first or the center point first.
The length of the chord of the arc determines the included angle.
Draw Arcs by Specifying Start, End, Angle: You can create an arc using a start point, end point, and an included angle.
The included angle between the endpoints of the arc determines the center and the radius of the arc.
Draw Arcs by Specifying Start, End, Direction: You can create an arc using a start point, end point, and a tangent direction at the start point.
The
tangent direction can be specified either by locating a point on the
desired tangent line or by entering an angle. You can determine which
endpoint controls the tangent by changing the order in which you specify
the two endpoints.
Draw Arcs by Specifying Start, End, Radius: You can create an arc using a start point, end point, and a radius.
The
direction of the bulge of the arc is determined by the order in which
you specify its endpoints. You can specify the radius either by entering
it or by specifying a point at the desired radius distance.
if you want to learn how to use circle command in autocad then you came to right place because In this Autocad 2018 circle command tutorial we are going to learn and start drawing circles in AutoCAD. Time has come to move forward and learn more, I believe it is the right time to learn and see how to use AutoCAD to draw circles. The CIRCLE command is an important and a frequently used command, you can judge by its location and its size. Drawing a circle in AutoCAD is one of the most fundamentals while learning how to use the software. In AutoCAD there are many ways to draw circles, and all these ways depend on your inputs and the feature you want your future circle to have. there are six different types of circle in autocad to draw. 1) autocad circle radius: first select the center radius circle drawing option. Then select the center of the circle and then put the numerical value of circle radius and press enter button. 2) Center, Diameter: first select the center radius circle drawing option. Then select the center of the circle and then put the numerical value of circle diameter and press enter button. 3) 2 Point: This option is used if want to draw a circle that passing through any two points. 4) 3 Point: This option is used if want to draw a circle that passing through or toughing any three points. 5) autocad circle tan tan radius / autocad circle ttr: When there is needed to draw a circle at which two already drawn lines are tangent and also needed the value of circle radius, then we use this option. After selecting this option first we select the first line and then select second line. After that put the value of circle radius by using numerical buttons on keyboard and at the end press enter button. 6) Tan, Tan, Tan: When there is needed to draw a circle at which three already drawn lines are tangent, then we use this option. After selecting this option first we select the first, second and third line respectively which you want to make tangent on circle. Just after selecting the third line required circle will appear.
if you want to learn "how to draw a line using Direct distance entry in autocad 2018 with an example" then you came to right place because here you will find "AutoCAD line command tutorial with example".
there are basically 4 methods to draw line in autocad and i have already shown three methods in previous tutorial, and i this video i have shown one method to "draw draw line in autocad 2018". which is:
1) Direct distance entry in autocad : In the direct distance entry method, you draw a line by entering its distance and angle values. You use the Dynamic Input mode in this method. so you can also use this method to draw a line with angle in autocad.
A simplified method of entering coordinates when the distance and direction from the last point are known is called Direct Distance Entry. In a nutshell, Direct Distance Entry eliminates the need for most keyboard entry of coordinates. Direct Distance Entry can be used anytime a command prompts for a point.
Introduction
Direct distance entry is one of those AutoCAD features that is often overlooked. This is rather unfortunate because it can be extremely useful and an amazing time-saver. Basically, direct distance entry enables you to draw an object, such as a line, by pointing in a particular direction with the cursor and entering a distance at the command line.
Note: The direct distance entry method is not available while you are using temporary override keys for Ortho, object snap tracking, or polar tracking.
• Overview of line command of autocad which i have explained in previous tutorial of autocad 2018
Command/Shortcut: LINE / L Location: Draw - Line
Specify first point: Specify a point
Specify next point: Move the cursor in the desired direction and follow steps as shown in video.
if you want to learn "how to draw a line at angle to another line using Polar Coordinate system in autocad 2018 with an example" then you came to right place because here you will find "AutoCAD line command tutorial with example".
there are basically 4 methods to draw line in autocad and i have already shown two methods in previous tutorial, and i this video i have shown one method to "draw angled line in autocad 2018". which is:
1) polar coordinate system in autocad
In the polar coordinate system, you define the location of a point by entering two values: distance from the previous point and angle from the zero degrees. You enter the distance value along with the @ symbol and angle value with the "Greater than"symbol. You have to make a note that AutoCAD measures the angle in anti-clockwise direction.
and in this video you will also learn to measure angle between two lines in autocad 2018.
• Overview of line command of autocad which i have explained in previous tutorial of autocad 2018
Command/Shortcut: LINE / L Location: Draw - Line
The Line command draws a straight line from one point to another. When you pick the start point of the line, you need to specify the endpoint of the line segment on screen. You can either continue to specify additional line segments or end the line there. If you want to undo a previous line, enter U at the prompt. To end the command, you can press Enter or ESC, or enter C to close a series of line segments.
You can choose to pick the position of your lines by using your mouse to click on the screen. If you want to be more precise, you can use coordinates instead. When you type LINE or L into the command window and press Enter, you’ll be prompted to specify a point location by using coordinates.
if you want to learn "how to draw a line in autocad with coordinates" then you came to right place because here you will find "AutoCAD line command tutorial with example".
there are basically 4 methods to draw line in autocad and i have shown two methods, which are:
1. absolute coordinate system in autocad
2. relative coordinate system in autocad
i will tech you remaining mehod in next upcoming videos.
in this video, i shown you relative coordinates example and absolute coordinate example, so you can understand basic difference between absolute and relative coordinates in autocad.
• Overview of line command of autocad
Command/Shortcut: LINE / L
Location: Draw > Line
The Line command draws a straight line from one point to another. When you pick the start point of the line, you need to specify the endpoint of the line segment on screen. You can either continue to specify additional line segments or end the line there. If you want to undo a previous line, enter U at the prompt. To end the command, you can press Enter or ESC, or enter C to close a series of line segments.
You can choose to pick the position of your lines by using your mouse to click on the screen. If you want to be more precise, you can use coordinates instead. When you type LINE or L into the command window and press Enter, you’ll be prompted to specify a point location by using coordinates.
AutoCAD 2018 has been released I’ve been waiting impatiently for the release of AutoCAD 2018
Introduction of AutoCAD 2018:
CAD is an abbreviation for Computer-Aided Design. It is the process used to design and draft components on your computer. This process includes creating designs and drawings of the product or system. AutoCAD is a CAD software package developed and marketed by Autodesk Inc. It can be used to create two-dimensional (2D) and three-dimensional (3D) models of products. These models can be transferred to other computer programs for further analysis and testing. In addition, you can convert these computer models into numerical data. This numerical data can be used in manufacturing equipment such as machining centers, lathes, mills, or rapid prototyping machines to manufacture the product.
AutoCAD is one of the first CAD software packages. It was introduced in the year 1982. Since that time, it has become the industry leader among all CAD products. It is the most widely used CAD software. The commands and concepts introduced by AutoCAD are utilized by other systems. As a student, learning AutoCAD provides you with a greater advantage as compared to any other CAD software.
If you are a new user of this software, then the time you spend on learning this software will be a wise investment. If you have used previous versions of AutoCAD, you will be able to learn the new enhancements. I welcome you to learn AutoCAD by watching autocad 2018 video tutorials to learn various commands and techniques.
AutoCAD user interface:
When you open AutoCAD 2018, the AutoCAD 2018 initial screen will appear.
On the Initial Screen, click Start Drawing to open a new drawing file. The drawing file consists of a graphics window, ribbon, menu bar, toolbars, command line, and other screen components, depending on the workspace that you have selected.
Introduction Learning to use a AUTOCAD software is similar to learning a new language. It is necessary to begin with the basic alphabet and learn how to use it correctly and effectively through practice. This will require learning some new concepts and skills as well as learning a different vocabulary. Today, the majority of the Mechanical CAD systems are capable of creating three-dimensional solid models. Nonetheless, all CAD systems create designs using basic geometric entities and many of the constructions used in technical designs are based upon two-dimensional planar geometry. The method and number of operations that are required to accomplish the basic planar constructions are different from one system to another.
In order to become effective and efficient in using a CAD system, we must learn to create geometric entities quickly and accurately
