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Thursday, 30 May 2013

Any location in a drawing has its unique coordinates (Cartesian or Polar System) and can be described in X, Y and Z coordinate values. Those values are shown at the left side of the drawing status bar.

Cartesian & Polar System

Cartesian co-ordinate system is the standard system that it is used in AutoCAD. In 2 dimension drawings the first value is expressed as the X co-ordinate measured along the horizontal axis, the second value is expressed as the Y co-ordinate measured along the vertical axis, while the third value, Z will always be zero. It has to be mentioned that the origin is always 0, 0.
2D Line
Polar co-ordinate system is used to express the position of point in drawing space. The main difference between Cartesian & Polar is that the second one uses one distance and one angle in order to describe the position of a point. Both the distance and the angle are measured from the origin (0,0) as shown below. The angles in AutoCAD starts at X axis (0 or <360 degrees) going anticlockwise. In the positive Y axis the angle is 90 degrees, in the negative X axis is < 270 degrees and finally c

Polar System

Co-ordinate system in 3D drawings:

In 3 dimension drawings the points are expressed in X, Y, Z coordinate values and there are always separated by a comma.

3D Lines

Sunday, 26 May 2013

The days of pen & paper belongs to the past. Nowdays designing by hand is replaced by the use of CAD programs (CAD stands for Computer Aided Programs). Mouse & keyboard are the tools in order to create new drawings.

At this point I will demonstrate the mouse functions.
  • Left click is used for selection purposes as for example we can select to draw a line from the toolbar.
  • By right clicking the following menu will appear on the screen. We can pan, zoom, repeat a previous command, options etc.

  • Select an object and then by right clicking a different menu is availiable. The options are related to the selected object that gives us the ability to make alterations. We can move, rotate, erase it, etc.

  • Hold left click + drag the mouse to the right: Every object that is inside this window is selected. It has to be noted that the whole object must be included in the window.

  • Hold left click + drag the mouse to the left: Creates a crossing window. Every object that it is crossed by this window is selected even if the whole object is not included.

Crossing Window

Saturday, 25 May 2013

Hello everyone, my name is Constantinos and I am a Civil Engineer. I love design, so I have decided to create this blog in order to share my passion & knowledge. This is my 1st post and I hope that you will enjoy and learn staff about design. If you have any comments, suggestions or anything else do not hesitate to contact me. So, with no further delay I welcome you to the amazing design world.


video source: Autodesk

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