How a plant moves in the look’s wind, each at the reference wind of
10 m/s. The engine’s breeze of 3 m/s moves a plant 0.53 of each, and a
storm at most 1.6 times. Each sway runs near its period with a phase
that wanders, so it never repeats, and swings further in a gust than
in a lull.
| Property |
Type |
Description |
bend? |
number |
Metres, in the model’s own size, a bough’s tip moves at most, downwind and toward the ground, by the asset’s _WIND bough weight or the engine’s from the distance to the plant’s axis. Left out, 0.05 times the square root of the model’s height over 20 m, that root at least 0.35. |
flutter? |
number |
Metres, in the model’s own size, a leaf’s free edge shakes along its card, about 3 times a second, by the asset’s _WIND flutter weight; a model with no _WIND does not flutter. A gust’s heart shakes it all; under a look’s gust of 0.5 or more a lull shakes it a tenth, and a steady wind evenly. Left out, 0.004 times the square root of the model’s height over 20 m, that root at least 0.35. |
swayRadians? |
number |
Radians the plant’s top reaches downwind about its foot, from 0 to below 1, the plant below it less by the square of its height share: 0.65 of it a held lean, the rest a sway about it, with a smaller sway across the wind. Left out, 0.02 for a model 20 m tall or more, and more for a smaller one, by the square root of 20 m over its height, up to 0.06 for one of 2.2 m or less. |
swaySeconds? |
number |
Seconds of one sway, above 0; a bough’s is 0.45 of it. Left out, 1.15 times the square root of the copy’s height in metres, at least 1.6 s: 5.3 s for a 21 m spruce, 1.6 s for a 1 m fern, and a bough’s 0.45 of that from 1.2 to 3 s. |