China
Africa
Explore chapters and articles related to this topic
Drawing, Erasing and the Selection Set
Published in Bob McFarlane, Beginning AutoCAD 2005, 2012
The ERASE command can be activated:with the ERASE icon from the Modify toolbarfrom the menu bar with Modify-Eraseby entering ERASE <R> at the command line.
Drawing, erasing and the selection set
Published in Bob McFarlane, Beginning AutoCAD 2002, 2012
During the various exercises in the book, we will use all of these options but will only consider three at present. Erase all objects from the screen – individual selection or window optionRefer to Fig. 5.10(a) and draw some new lines and circles – the actual layout is not important, but try and draw some objects ‘inside’ othersRefer to Fig. 5.10(b), select the ERASE icon from the Modify toolbar and: The highlighted objects will be erased.Enter OOPS <R> to restore these erased objects. Menu bar with Modify-Erase and referring to Fig. 5.7(c): OOPS to restore the erased objects.a) activate the ERASE command enter CP <R> at command line – crossing polygon optionpick points in order as Fig. 5.10(d) then right-click and pick Enterright-click to erase the highlighted objects.The fence/window polygon/crossing polygon options of the selection set are very useful when the ‘shape’ to be modified does not permit the use of the normal rectangular window. The user can ‘make their own shape’ for selecting objects to be modified.
A computer aided drawing system evaluation with early and late blind users
Published in Assistive Technology, 2022
Sandra Fernando, James Ohene-Djan
The user inputs these commands using a keyboard (the currently presented input mode), one command at a time, whereupon the system executes either the appropriate screen navigation or produces 2D shapes/art at the selected location. The system gives voice feedback after every command to confirm the operation. There are system help commands such as description, help, route and erase, as part of the usability command language to help the user to request orientation information, ask for names of labels and shapes on the screen, and provide instructions to reverse a drawing or navigation. Users can save the image or get it printed using a raised line printer to verify the image. One of the future developments is to add a tactile layer on an external device to give real-time feedback and add a speech recognition API (Application Programming Interface) to input commands.