sutherland

To run:

yarn
vite

... then point your web browser at http://localhost:5173/ (or whatever else vite tells you the URL is)

Controls for iPad + Apple Pencil:

• Drawing, etc.:
  • To draw lines, move the pencil around, tapping the LINE button each time you want a new segment
  • To draw an arc, point the pencil at the center of the arc and tap the ARC button; now move it to one of the ends of the arc and tap ARC again; then move it to the other end of the arc and tap ARC one last time
  • To move a point / line / arc, point at it with the pencil, then tap MOVE and move the pencil around; lifting the pencil terminates the move
  • To pan, move your finger on the background
  • To zoom in / out, do a pinch gesture
  • To delete a line / arc / instance, point at it with the pencil and tap DEL
  • To clear the current drawing / master, tap CLEAR
• Masters and instances:
  • To switch drawings, tap one of the number buttons (1 through 6)
  • To instantiate a drawing, tap one of the number buttons (1 through 6) while pointing at the desired location for that instance
  • To rotate or scale an instance, point at it with the pencil and do a pinch gesture (you can rotate your fingers like you're operating a pretend knob to rotate)
  • To dismember an instance, point at it with the pencil and tap DISM
• Constraints:
  • horizontal or vertical (HorV): point to a line and tap HORV
  • point on line: move a point to a line, drop it there
  • (this constraint is also added when you draw a line that terminates on another line)
  • To designate/undesignate a point as an attacher, point at it with the pencil and tap ATT
  • To make several lines have equal length, hard-press on them with the pencil while you hold down the EQ button
  • To add a fixed length constraint to a line, point at it with the pencil and tap FIX
  • To add a fixed position constraint to a point, point at it with the pencil and tap FIX
  • To constrain an instance to the master's full size, tap SIZE while pointing at it with the pencil
  • To attach a weight to a point, point at it with the pencil and tap WEIGHT
  • To run the solver, hold down the SOLVE button
  • To toggle auto-solve mode on/off, double-tap SOLVE

Controls for Desktop:

• Drawing, etc.:
  • To draw lines, click around while holding down the "meta" key (⌘ or ⊞)
  • To draw an arc, hold down the A key: 1st click is the center, 2nd and 3rd are the end points
  • To move a point / line / arc, just drag it
  • To pan, drag the background
  • To re-center the scope at the position of the cursor, press C
  • To zoom in / out, press + / -
  • To delete a line / arc / instance, point at it and press backspace
  • To toggle flicker on / off, press F
  • To copy the current drawing, press SHIFT + C
  • To paste the copied drawing, press P
• Masters and instances:
  • To switch drawings, press one of the digit keys
  • To instantiate a drawing, press SHIFT + one of the digit keys
  • To rotate an instance, press Q / W while pointing at it
  • To scale an instance, press + / - while pointing at it
  • To dismember an instance, press SHIFT + D while pointing at it
• Constraints:
  • horizontal or vertical (HorV): point to a line and press H
  • point on line: drag a point to a line, drop it there
  • (this constraint is also added when you draw a line that terminates on another line)
  • To designate/undesignate a point as an attacher, point at it and press SHIFT + A
  • To make several lines have equal length, click on them while pressing E
  • To add a fixed length constraint to a line, point at it and press .
  • To add a fixed position constraint to a point, point at it and press .
  • ...
  • To run the solver, hold down the SPACE key
  • To toggle auto-solve mode on/off, press SHIFT + S