Hi,
The rendering of Dimensions under QCAD is nothing more than a collection of well placed drawing objects.
Some sort of grouped shapes in QCAD.
I know that for example an arrow is a Solid shape in QCAD, the only solid you can create in QCAD.
Based on a triangle shape by
RTriangle::createArrow(...)
The same is true for a simple Tick mark ... It is nothing more than a short line piece.
RDimStyleProxyBasic::getArrow
Using Tick marks or arrows is a QCAD (limited) Dimension property.
It is the target application that renders them just like QCAD renders Dimensions entities in its own way.
There is also something like cached Dimension Blocks by other applications.
But it is said that QCAD disregard those and renders a Dimension directly from properties.
If disregarded ... It would be strange that QCAD creates those.
But if created, it can off-course be that the line type of the Tick mark is not well stored in the DXF/DWG.
The other target applications then don't re-render and take the stored shapes for granted.
And no, arrowheads don't necessarily look the same ... QCAD tip angle = 2 * 0.165rads or 18.9076° or about a 3:1 ratio.
There are several other drawing standards but in QCAD it will always be 0.33rads.
Regards,
CVH
