tangent
Appends arc to path, after appending line if needed. Arc is contained by tangent from last point to (x1, y1), and tangent from (x1, y1) to (x2, y2).
Return
this builder for chaining
Parameters
x1
x-axis value common to pair of tangents
y1
y-axis value common to pair of tangents
x2
x-axis value end of second tangent
y2
y-axis value end of second tangent
radius
distance from arc to circle center
Appends arc to path, after appending line if needed.
Return
this builder for chaining
Parameters
p1
point common to pair of tangents
p2
end of second tangent
radius
distance from arc to circle center