COMPUTER AIDED DRAFTING 1 Pharos University Faculty of Engineering Architecture Department 3 rd semester 2010/2011 AE (151) Prof.Dr. Alaa Eldin Hassan Hamdy

 Drawing commands  Layers  Blocks  Hatching  Dimension  Inquiry  Printing and plotting  View ports

Lecture 1 Drawing Commands

Object Construction: Line - Using Line command with different coordinate systems 1- Absolute coordinate system 2- Polar coordinate system 3- Relative coordinate system 4- Ortho mode Erase - Using Erase commands with different options 1- Erase an object 2- Using Window option for erasing drawing set 3- Using crossing option for erasing drawing set Poly-line - Using Poly-line command 1- Arc function poly-line 2- Length function poly-line 3- Width function poly-line Multi-line - Using Multi-line command 1- Double line 2- Multi-line (creating a special mode)

Object Construction: Circle - Using Circle command 1- Center and Radius mode 2- Center and Diameter mode 3- Two point mode 4- Three-point mode 5- Tangent-Tangent Radius mode 6- Application for constructions different shapes Arc - Using Arc command 1- Three-point mode 2- Different options for Arc drawing Line type - Using different Line type 1- Creating line type 2- Controlling line type 3- Line-type Scale 4- Using Properties option for controlling line type 5- Using Match – Properties for line type

Drawing commands :pull down menu

Object Construction: Object Snap -Object Snap and drawing accuracy 1- Single point selection 2- Running mode Construction Shapes - Using special Construction Shapes 1- Rectangle 2- Spline Object Snap