Hi Rallaz,

sounds like I misunderstood this feature.

so snap perpendicular is the projected point of relative zero on the nearest entity.

if so, it's straight forward to implement it.

i still want to see some examples first.

thanks,

dongxu

On Mar 7, 2012 11:23 AM, "Rallaz [via LibreCAD]" <[hidden email]> wrote:

It may be a nonsense but...

A snapPerpendicular is a point from "relative zero" to entity in mouse.

line by 2 points case with a snapPerpendicular activated
click the first point, the relative zero are moved to the clicked point,
click the second point, RS_Snapper::snapPoint is called
snapPoint gets the "relative zero" coordinate and calculate the
perpendicular point in the entity over the mouse

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