Hi Stefan, thanks for the reply. My math just isn't up to this.
P5 is the Unknown and is needed.
Given: Points - Origin, P1, P2, and P8 is optional
Line 2 (Any length from P1)
Not needed but could be used:
Points - P3, P4, P8
Not needed:
Points - P6, P7
Lines - 1, 3, 4, 5
Lines 4 and 5 were only for "offset" construction and could be reference lines only.
I'm not sure if a Tangent Arc will work with a reference line or not.
Needed:
XY points - P1, P2, Origin
Line for Tangent Arc (line 2)
All lines are parallel with axes. No angles.
The arc radius will be determined by points 1 and 2 and tangent to line 2. Point 1 is the start point. Just like Alibre Design does it.
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For a script I would only be using numbers for coordinates and the formula for POINT 5.
If I'm still not clear, just ask more.
Thanks again.