There is a problem drawing corners with code in Layout

path = 'C:\Users\admin\Desktop\无标题.layout'
doc = Layout::Document.open path
start_p = Geom::Point2d.new(20.mm, 20.mm)
r, a = 5.mm, 5.mm * Math.sqrt(2)
p1 =  start_p + Geom::Vector2d.new(a * 2, 0)
p2 =  start_p + Geom::Vector2d.new(a, -a)
new_path = Layout::Path.new(start_p, p2)
doc.add_entity new_path, doc.layers.first, doc.pages.first
new_path = Layout::Path.new(p1, p2)
doc.add_entity new_path, doc.layers.first, doc.pages.first
doc.save path

Use append_point and close.
Avoid closed point is the inflection point.

start_p = Geom::Point2d.new(20.mm, 20.mm)
r, a = 5.mm, 5.mm * Math.sqrt(2)
center = start_p + Geom::Vector2d.new(a, 0)
p1 = start_p + Geom::Vector2d.new(a, -a)
p2 = start_p + Geom::Vector2d.new(a * 2, 0)
new_path = Layout::Path.new(center, start_p)
new_path.append_point p1
new_path.append_point p2
new_path.append_point center
new_path.close
doc.add_entity new_path, doc.layers.first, doc.pages.first

You can also control the type of join and end caps for Layout::Path objects.
They are a subclass of Layout::Entity so they also have a style getter and style= setter.

The Layout::Style class has join type constants:
Layout::Style::JOIN_STYLE_MITER
Layout::Style::JOIN_STYLE_ROUND
Layout::Style::JOIN_STYLE_BEVEL
… also stroke pattern (stipple) style and end cap style constants.

For example …

path_style = new_path.style
path_style.stroke_join_style= Layout::Style::JOIN_STYLE_ROUND
path_style.stroke_cap_style= Layout::Style::CAP_STYLE_ROUND

# Might need to set the modified style back to the entity:
new_path.style= path_style

@tt_su Do mods to an Layout::Entity's style manifest immediately ?

Not sure, I need to check.

I asked internally. The response:

You must set the style on the entity. The style object received is a copy.
To be more technical than is necessary, the style object is created at the time of request and is never owned by the entity in the first place.

2 Likes

Thank you Thomas, this is as I had thought (and surmised in the above code comment.)

I drew two lines before. This situation of two lines should not be handled.