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CADD-1 Lesson 5
Unit 7-9 (Methods of Drawing, Help, & Object Snaps)
Command | Definition |
---|---|
Absolute Method | Uses an x,y coordinate pair measured from the origin. |
Relative Method | Uses an x,y coordinate pair measured from the last point selected. |
Polar Method | Uses an exact distance at a specific angle (or direction) based on a 360 degree circle. |
Polar Tracking | Recurring angles that provide a temporary alignment path for angles. |
OSNAP modes | Allow you to snap (or grab) predefined points on an existing object. |
X axis | Horizontal |
Y axis | Vertical |
Origin | Where the x and y axis meet, value is 0,0. |
Specifying points with keyboard | Advantage is that is more accurate |
Specifying points with mouse | Advantage is that it is faster. |
Running Object Snaps | Allows you to lock on one or more of the OSNAP modes so that they are automatically available to you. |
Apperture Box | Also known as the target box, controls the size of the target box. |
Center | snaps to the center of an arc or circle. |
Endpoint | snaps to the endpoint of a line or an arc. |
Intersection | snaps to the intersection of any entities that meet or cross each other. |
Midpoint | snaps to the exact middle of a line or arc. |
Nearest | sanps to the point on any entity that is closest to the crosshairs. |
Perpendicular | snaps to a point on any entity that forms a 90 degree angle. |
Quadrant | snaps to the closest quadrant point on an arc or circle. |
Snap From | allows the operator to position the crosshairs from a specific point without drawing construction lines. |
Extended Intersection | snaps to the apparent intersection of two lines if they were extended. |
Tangent | snaps to the point on an arc or circle that is tangent to the previous point. |
AUDIT command | checks the validity of the drawing and fixes any errors |
RECOVER command | runs an audit of the drawing and attempts to open a damaged drawing file. |
AutoCAD's Preview Feature | allows you to locate files by looking at them prior to opening the file. |
Help commands | provides for help on Autocad commands. |
Context Sensitive Help | takes you directly to help on an active command. |
F1 function key | Access AutoCAD help. |
F2 function key | Access AutoCAD Text window |
F3 function Key | Toggles running OSNAPS on/off |
Drawing recovery Manager | Allows you to see which files are recoverable or have backup files. |
Dynamic Input | Allows you to view command line & input information at the crosshairs. |
Cartesian Coordinate System | coordinate system where the values for x,y are both positive. (World Coordinate System in AutoCAD) |