In AutoCAD, point coordinates can be represented by Cartesian coordinates, polar coordinates, spherical coordinates and cylindrical coordinates, and each coordinate has two coordinate input methods: absolute coordinates and relative coordinates. Among them, rectangular coordinates and polar coordinates are the most
commonly used.
1. Cartesian coordinate method:
The coordinates represented by the X,Y coordinate values of the point. Entering the coordinates of a point "100, 100" in the command line
means that a point whose X and Y coordinates are 100 and 100 respectively is entered. This is the absolute coordinate input method, which means that the
coordinates of this point are relative to the current coordinates The coordinate value of the origin, as shown in the figure. If "@100,0" is input, it is relative coordinate
input mode, which means that the coordinate of this point is relative to the coordinate value of the previous point.
1.1 dash l command
After input l, 100,100
1.2 Relative to the previous point (relative coordinates) @100,0 [Move 100 in the horizontal direction relative to the previous point, and 0 in the vertical direction]
1.3 After drawing, it will look like the following.
2. Polar coordinate method:
The coordinates represented by length and angle can only be used to represent the coordinates of two-dimensional points. In the absolute coordinate input
mode, it is expressed as: "length<angle", such as "100<45", where the length represents the distance from the point to the coordinate origin, and the angle
represents origin and the positive direction of the X axis. angle, as shown in the figure.
In the relative coordinate input mode, it is expressed as: "@length<angle", such as "@100<45", where the length is the distance from this point to the previous
point Positive included angle, as shown in Figure 2-6d.
3. Dynamic data input:
Press the "Dynamic Input" button in the status bar, the system will open the dynamic input function, and
some parameter data can be dynamically input in the drawing area.
For example, when drawing a straight line, " specify the first corner point or" and the following coordinate frame will be displayed dynamically near the cursor . The current coordinate box shows the current position of the cursor, and
data can be input, and the two data are separated by commas, as shown in the figure. After specifying the first point, the system dynamically displays the angle of the line, and
at the same time requires the input of the length of the line segment, as shown in the figure, the input effect is the same as that of "@length<angle".
3.1 If there is no such button, just find the place with a horizontal line in the lower right corner
