Watercraft parameters
Used for boats/ships and amphibious vehicles only.
| type | property | description | default |
|---|---|---|---|
| float4 | Cx | drag coefficients for model-space directions and angular damping mod coef x: sidewise drag coefficient y: forward drag coefficient z: vertical drag coefficient w: relative angular coefficient (adjusts the computed angular damping) |
(JS) {x:0.0,y:0.0,z:0.0} (C++) {0.f ,0.f ,0.f} |
| float | hydro_offset | distance from center of mass along z where hydrostatic force acts [m] | 1 |
| float | hydro_uplift | front uplift coefficient, N per m/s when submerged up to h1 | 0 |
| float | hydro_w | width of hydro volume (0 - use bbox, <0 shrink bbox values) | 0 |
| float |
hydro_wake (JS) hydro_wake_wmul(C++) |
wake width multiplier | 1 |
| float | hydro_l | length of hydro volume (0 - use bbox, <0 shrink bbox values) | 0 |
| float | hydro_h1 | height of the triangular prism part of the boat underwater [m] | 0 |
| float | hydro_h2 | height of the box part of the boat [m] | 0 |
| float | hydro_volcoef | closed volume coefficient (0..1) Tells how much of the volume is hollow |
0 |
Note: if hydro_volcoef is not specified or is 0, the hydrostatic forces are not computed, but the speed loss from drag still is.
Example drag coefficients in model-space dimensions:
- boats - x:1.2, y:0.1, z:1.2, w:0.9
- vehicles - x:1.2, y:0.4, z:1.2, w:0.9
You can find more about drag coefficients on http://en.wikipedia.org/wiki/Drag_coefficient
