1 In LibreCad Cartesian coordinates can be inserted considering two cases, that may give the same result: 1. The coordinates can also be defined as the positions of the perpendicular projections of the point onto the two axes, expressed as signed distances from the origin, the picture explains those concepts. Each reference line is called a coordinate axis or just axis of the system, and the point where they meet is its origin, usually at ordered pair (0,0). A Cartesian coordinate system it is a system that specifies each point uniquely in a plane by a pair of numerical coordinates (1), which are the signed distances from the point to two fixed orthogonal directed lines, measured in the same unit of length. If you are already into others cad system probably this little chapter is not necessary to be read. LibreCad User manual page 2ģ COORDINATES Before to start with the cad commands, it is really important to have clear the meaning of the word coordinate. THE VIEW BAR This bar is a bit more specific it allows to: Show the grid Turn on/off the draft mode Redraw the work Zoom in Zoom out Auto zoom Previous view Zoom a selected window Activate the pan. (*) (Please notice that LibreCad operates with.dxf file format) THE EDIT BAR This is another common bar that many other programs have, there is nothing specific considering the cad side, the icons' function are in order: Switch to selection pointer Undo the last operation Redo the last operation Cut Copy Past. 1 LibreCad User manual (version beta 1) LibreCad User manual page 1Ģ GENERAL BARS THE FILE BAR This bar is the basic bar that you may find in any other applications, is quite standard, looking at the picture under the title there are in order : New file Open a file Save file Print draw Print preview.
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