Вступ

Force Fields offer a way to influence a simulation, in example to add extra movement. Particles, Soft Bodies, Rigid Bodies, and Cloth objects can all be affected by forces fields. Force Fields automatically affect everything. To remove a simulation or particle system from their influence, simply turn down the influence of that type of Force Field in its Field Weights panel.

  • Усі типи об’єктів та частинок можуть генерувати поля, але тільки об’єкт типу «крива» може володіти полем «Провідна Крива» – Curve Guide.
  • Force Fields can also be generated from particles. See Particle Physics.
  • The objects need to share at least one common layer to have an effect.

Ви можете лімітувати цей ефект для частинок групою об’єктів (дивіться детальніше тут – Particle Physics).

Створення Силового Поля

Орієнтир – Reference

Mode:Object Mode
Panel:Physics ‣ Fields

Для створення одиничного Силового Поля ви можете викликати меню «Додання > Силове Поле» – Add ‣ Force Field та вибрати бажаний тип силового поля. Цей метод створює об’єкт типу «Порожняк» – Empty з прикріпленим до нього силовим полем.

Examples of Empty with the force field attached.
../../../_images/physics_forces_force-fields_types_vortex_visualzation.png

Vortex force field.
../../../_images/physics_forces_force-fields_types_wind_visualzation.png

Wind force field.
../../../_images/physics_forces_force-fields_types_force_visualzation.png

Force force field.

Для створення поля з наявного об’єкта ви повинні виділити цей об’єкт та увімкнути фізику силового поля кнопкою Force Field у вкладці Physics Редактора Властивостей. Вибрати тип поля у списку опції «Тип» – Type на панелі Force Fields.

Примітка

After changing the fields Fields panel or deflection Collision panel settings, you have to recalculate the particle, soft body or cloth system by Free Cache, this is not done automatically.

Particles react to all kinds of Force Fields, soft bodies only to Force, Wind, Vortex (they react on Harmonic fields but not in a useful way).

Загальні устави полів

Більшість полів мають однакові устави, хоча вони і діють дуже по-різному. Унікальні устави для типів полів описуються окремо. Типи полів «Провідна Крива» та «Текстура» – Texture мають зовсім інші опції.

Форма – Shape

Sets the direction which is used to calculate the effector force. For force fields from an empty object only Point and Plane shapes are available, as for a field from a 3D object there are additional Surface and Every Point options, and Curve for a field from a curve.

Точка – Point
Point with omni-directional influence. Uses the object origin as the effector point.
Площина – Plane
Influence only in the local Z direction.
Поверхня – Surface
The force field acts on a 3D object’s surface. In this case, the Z axis is the surface normal.
Кожна Точка – Every Point
Uses every vertex in the mesh object as an effector point.
Curve
The force field acts along a curve object.
Сила – Strength
The strength of the field effect. This can be positive or negative to change the direction that the force operates in. A force field’s strength is scaled with the force object’s scale, allowing you to scale up and down the scene, keeping the same effects.
Потік – Flow
If non-zero, the effective force depends on the particle velocity. The value defines how quickly the effector force (acceleration) will be converted into the constant «air flow» velocity.
Noise Amount
Додає шум у силу поля.
Базис – Seed
Змінює базис випадкового шуму.
Affect Location
Influence the location of particles.
Affect Rotation
Influence the rotation of particles.
Absorption
Поле буде поглинатися об’єктами з властивістю зіткнення.

Спад – Falloff

Here you can specify the shape of the force field (if the falloff Power is greater than 0).

Форма – Shape
Сфера – Sphere
The falloff is uniform in all directions, as in a sphere.
Труба – Tube
The falloff results in a tube-shaped force field. The field’s Radial Power can be adjusted, as well as the Minimum and Maximum distances of the field.
Конус – Cone
The falloff results in a cone-shaped force field. Additional options are the same as those of Tube options.
Напрям Z – Z Direction
The force can be set to apply only in the direction of the positive Z axis, negative Z axis, or both.
Power
How the power of the force field changes with the distance from the force field. If r is the distance from the origin of the object, the force changes with 1/rpower. A falloff of 2 changes the force field with 1/r2, which is the falloff of gravitational pull.
Максимум відстані – Max Distance
Makes the force field affect other objects only within a specified maximum radius (shown by an additional circle around the object).
Мінімум відстані – Min Distance
The distance from the object’s origin, up to where the force field is effective with full strength. If you have a falloff of 0 this parameter will have no effect, because the field is effective with full strength up to Max Distance (or the infinity). Shown by an additional circle around the object.