Settle down (bird)

Settling down for a bird: the legs fold under and the wings fold in and settle, the same whether it is landing on the ground, a perch or a ledge.

Use it in a cartoonOpen it in the block editorThe pack file (JSON)

What it is for

Settle down (bird) is the sit-down of the nine game cycles, written for the bird set: a bird settles down onto its folded legs and fluffs its wings, the same whether it is landing on the ground, a perch or a ledge at hip height. This body only has a ground version to settle onto, since the pose does not change by surface the way the upright sit-down's does.

The principle it shows: arcs

The same cosine geometry that keeps a two-bone leg's foot planted keeps this one-bone leg's foot planted too, worked out from the exact same formula with a much shorter leg length. Folding onto a short, single-bone leg bends further and faster than the long-legged sit, which is what makes this read as settling rather than sitting down the ordinary way.

The program, line by line

settings: h = 540, leg = 0.05, on = 0
when it starts
  show the side view
  at the same time:
    — 1:
      glide left leg 45, right leg 45, left foot -45, right foot -45, left arm -10, right arm 10, head -4, tail -14 over 0.7 s (smooth)
    — 2:
      set dx 0, dy 0
      for 0.7 s:
        dy follows (h*leg*(1 - cos(((0 + 45*smoothstep(min(local/0.7, 1))))*pi/180)))
        dx follows (-h*leg*sin(((0 + 45*smoothstep(min(local/0.7, 1))))*pi/180))
  set dx (-h*leg*sin((45)*pi/180)), dy (h*leg*(1 - cos((45)*pi/180)))
  glide left arm 0, right arm 0 over 0.2 s (smooth)

• show the side view — the move is drawn in profile.
• at the same time: — the whole settle in one motion: both legs fold to 45 degrees, both feet turn under, the wings pull in close, the head dips and the tail tucks, over 0.7 seconds, the body's own position kept in step with the fold so the feet do not slide.
• set dx …, dy … — locks the body to match the fully settled pose.
• glide left arm 0, right arm 0 over 0.2 s (smooth) — the wings fold in the rest of the way and settle, after the legs have already folded.

Written out in full, exactly as the engine prints them:

h*leg*(1 - cos(((0 + 45*smoothstep(min(local/0.7, 1))))*pi/180))

-h*leg*sin(((0 + 45*smoothstep(min(local/0.7, 1))))*pi/180)

-h*leg*sin((45)*pi/180)

h*leg*(1 - cos((45)*pi/180))

Try this

1. Take 1.1 seconds to settle instead of 0.7. The sit becomes a slow, careful fold instead of a quick one.

   In the program: ramp · over 0.7 → 1.1

2. Take half a second to fold the wings in instead of 0.2. The wings settle much more gradually after the legs have already folded.

   In the program: ramp · over 0.2 → 0.5

How it differs from Sit down and Sit (bird)

Sit down is the two-bone-leg version, where ground, chair and ledge genuinely bend the hips and knees differently. Sit (bird) is the held pose this move settles into once it finishes.

Works on

c4c:beh:sit_down_bird · version 1.0.0 · c4c-free · by Jabbertoon