AutoCAD 2D Tutorial - 126 - Chapter 14 Advanced Display CommandsAutoCAD 2D Tutorial - 127 - Transparent Commands 14.1 Transparent commands are those started while another is in progress. Precede transparent commands with an apostrophe. 1. Type LINE at the command prompt. Command: LINE Specify first point: (pick point) Specify next point or [Undo]: 'zoom >>Specify corner of window, enter a scale factor (nX or nXP), or [All/Center/Dynamic/Extents/Previous/Scale/ Window] <real time>: (pick corner) >>>>Specify opposite corner: (pick other corner) Resuming LINE command. Specify next point or [Undo]: (pick point) TIP: Commands that do not select objects, create new objects, or end the drawing session usually can be used transparently.AutoCAD 2D Tutorial - 128 - Multiple Command 14.2 Multiple repeats the specified command until canceled If you want to repeat a command that you have just used, press ENTER or SPACEBAR, or right-click your pointing device at the Command prompt. You also can repeat a command by entering multiple, a space, and the command name, as shown in the following example: 1. Type MULTIPLE before each command Command: multiple circleAutoCAD 2D Tutorial - 129 - Advanced Calculator Function 14.3 Evaluates mathematical and geometric expressions 1. Type CAL at the command prompt. Command: cal (or ‘cal) Initializing...>> Expression: 1+1 2 Numeric operators ( ) Groups expressions ^ Indicates exponentiation * , / Multiplies, divides +, - Adds, subtracts Vector operators ( ) Groups expressions & Determines the vector product of vectors (as a vector) [a,b,c]&[x,y,z] = [ (b*z) - (c*y) , (c*x) - (a*z) , (a*y) - (b*x) ] * Determines the scalar product of vectors (as a real number) [a,b,c]*[x,y,z] = ax + by + cz *, / Multiplies, divides a vector by a real number a* [x,y,z] = [a*x,a*y,a*z] + , - Adds, subtracts vectors (points) [a,b,c] + [x,y,z] = [a+x,b+y,c+z]AutoCAD 2D Tutorial - 130 - Converts units of measure 1. Type CAL at the command prompt. Command: cal (or ‘cal) Initializing...>> Expression: cvunit(1,inch,cm) 2.54 Determines Angles 1. Type CAL at the command prompt. Command: cal (or ‘cal) Initializing...>> Expression: ang(end,end,end)
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