Relocation of origin
Posted: Sat Sep 26, 2015 8:59 am
In many CAD systems there is a facility to drag and re-locate the origin i.e. the 0,0 co-ordinate.
This is usually temporary and does not affect the co-ordinates of any of the displayed points, it just adds an offset to them before putting them on the screen.
This facility would be useful when designing symetrical glyphs or glyphs where you want to know where things are relative to a point somewhere within the glyph.
For instance I put a the 'White Rose of Yorkshire' into Kelvinch, this is a very complicated glyph and started out as a pentagon. But I was constantly measuring things from each of the five corners and doing lots of sums on a calculator. I got around the problem by writing down the numbers and rotating the glyph by 72° about it's centre.
It would have been useful to locate the origin at each of the corners in turn and in the centre during this process.
Usually relocation of the origin is achieved by dragging the origin, i.e. dragging from the intersection of the horizontal and vertical rulers to the point where you want 0,0 to be. But also on some systems you can just type in the offsets. On some systems you can do either.
I don't know how easy this would be to implement or if it is possible but it is something to consider.
This is usually temporary and does not affect the co-ordinates of any of the displayed points, it just adds an offset to them before putting them on the screen.
This facility would be useful when designing symetrical glyphs or glyphs where you want to know where things are relative to a point somewhere within the glyph.
For instance I put a the 'White Rose of Yorkshire' into Kelvinch, this is a very complicated glyph and started out as a pentagon. But I was constantly measuring things from each of the five corners and doing lots of sums on a calculator. I got around the problem by writing down the numbers and rotating the glyph by 72° about it's centre.
It would have been useful to locate the origin at each of the corners in turn and in the centre during this process.
Usually relocation of the origin is achieved by dragging the origin, i.e. dragging from the intersection of the horizontal and vertical rulers to the point where you want 0,0 to be. But also on some systems you can just type in the offsets. On some systems you can do either.
I don't know how easy this would be to implement or if it is possible but it is something to consider.