Text align and arrows on small (value) dimenions are not right

[Jopie01]

I have some trouble with dimensions which have small values. I have created a DXF file which sets the dimension styles and use that as a template. When I add dimensions in paperspace and do a transform because of the scale of the view, I end up with a very strange dimension. I opened the exported DXF file in Bricscad.

When I select the dimension and change for example the layer, it will automatically update to the correct settings.

Below the function I'm using which adds the dimension. Previously I transformed the whole dimension, but rewrote it to only transform the needed points.

def add_dimension(self, layout, viewport, start, end, dim_type, offset=20, text=None):
    # get the scale and transformation matrix
    matrix = viewport.get_transformation_matrix()
    scale = viewport.get_scale()

    start_pos = matrix.transform(start)
    end_pos = matrix.transform(end)

    if dim_type == 'horizontal':
        base = (0, offset)
        angle = 0
    else:
        base = (offset, 0)
        angle = 90

    dim_place = matrix.transform(base)

    dim = layout.add_linear_dim(
        base=dim_place,
        angle=angle,
        p1=start_pos,
        p2=end_pos,
        dimstyle='ISO-25',
        override={
            'dimlfac': 1 / scale,
            'dimdec': 0,
        }
    )
    if text:
        dim.set_text_format(postfix=text)

    dim.render()

This works perfectly for placing the dimensions and for the larger dimensions. But the smaller ones needs some extra attention. Do I need an extra check myself for small values? Or is this something in ezdxf I can use?

[mozman]

The ezdxf dimension renderer will never be on par with CAD applications!

Here is a tutorial for overriding the default text location: https://ezdxf.mozman.at/docs/tutorials/linear_dimension.html#user-defined-text-locations

[Jopie01]

The ezdxf dimension renderer will never be on par with CAD applications!

That would be impossible and wasn't my question. I hoped if there was a kind of function to give me the result if the arrows and text were fitting between the lines. Then I could take action on that. For example to flip the arrows, I swap the two points. For shifting the text I'm using https://ezdxf.readthedocs.io/en/stable/tutorials/linear_dimension.html#location-relative-to-default-location