"line2p"

[ "line2P", "label", [x1,y1], [x2,y2], "nlabel" ]

line with two draggable points, meant for Mohr's circle construction.

The object returns a list of scaled co-ordinates [ [x1,y1], [x2,y2] ] to the names input field.

• label label for the line
• [x1,y1], [x2,y2] initial locations of the control points (in scaled units)
• nlabel (optional, default: none) label for an optional perpendicular line through the first point. This argument earlier was a scaling factor, which is obsolete. The infobox uses the settings of the "grid" object.

Objects:

• p1, p2 (point) control points of the line
• g (line) line
• n (line) optional normal line

See also "circle2p" for draggable circle and "grid" and Dynamic display of coordinates for grid scaling.

Dynamic intersection of two "line2p" obbjects

Demo Questions

Demo Moodle Course

• TM2 03 T02 Interactive construction of Mohr's circle
• TM2 10 01 Interactive input of the zero stress line in a non-symmetric bending problem
• TM3 06 T06 Interactive construction of the center of rotation in a mechanism

Example

[
  [ "grid", "x","y", -2,3,-1,2, 50, [10,10], [0,0] ],
  ["line2p", "label", [10,5], [20,10] ]
]

[
  [ "grid", "x","y", -2,3,-1,2, 50, [10,10], [0,0] ],
  ["line2p", "g", [10,5], [20,10], "n" ]
]