Script interface for Particle System Force Fields.
Particle System Force Fields can be used to influence groups of particles that enter each field's zone of influence.
The shape of the Force Field can be set to a variety of shapes, and how the particles are affected is controlled by various properties in the Force Field.
As part of choosing the shape, you may define a start and end range. The end range describes the maximum extent of the shape, and the start range can be used to create a hollow shape.
A number of forces can be applied to particles that are within this volume: directional, gravitational, rotational, drag, and a vector field.
The settings for each type of force make use of the MinMaxCurve type, which is also used in the Particle System. This type allows you to set simple uniform values, or more complicated values that vary per-particle, and vary over the lifetime of each particle.
using System; using System.Collections; using System.Collections.Generic; using System.Linq; using UnityEngine;
[RequireComponent(typeof(ParticleSystem))] public class ExampleClass : MonoBehaviour { public ParticleSystemForceFieldShape m_Shape = ParticleSystemForceFieldShape.Sphere; public float m_StartRange = 0.0f; public float m_EndRange = 3.0f; public Vector3 m_Direction = Vector3.zero; public float m_Gravity = 0.0f; public float m_GravityFocus = 0.0f; public float m_RotationSpeed = 0.0f; public float m_RotationAttraction = 0.0f; public Vector2 m_RotationRandomness = Vector2.zero; public float m_Drag = 0.0f; public bool m_MultiplyDragByParticleSize = false; public bool m_MultiplyDragByParticleVelocity = false;
private ParticleSystemForceField m_ForceField;
void Start() { // Create a Force Field var go = new GameObject("ForceField", typeof(ParticleSystemForceField)); go.transform.position = new Vector3(0, 2, 0); go.transform.rotation = Quaternion.Euler(new Vector3(90.0f, 0.0f, 0.0f));
m_ForceField = go.GetComponent<ParticleSystemForceField>();
// Configure Particle System transform.position = new Vector3(0, -4, 0); transform.rotation = Quaternion.identity; var ps = GetComponent<ParticleSystem>();
var main = ps.main; main.startSize = new ParticleSystem.MinMaxCurve(0.05f, 0.2f); main.startSpeed = new ParticleSystem.MinMaxCurve(1.5f, 2.5f); main.maxParticles = 100000;
var emission = ps.emission; emission.rateOverTime = 0.0f; emission.burstCount = 1; emission.SetBurst(0, new ParticleSystem.Burst(0.0f, 200, 200, -1, 0.1f));
var shape = ps.shape; shape.shapeType = ParticleSystemShapeType.SingleSidedEdge; shape.radius = 5.0f; shape.radiusMode = ParticleSystemShapeMultiModeValue.BurstSpread; shape.randomPositionAmount = 0.1f; shape.randomDirectionAmount = 0.05f;
var forces = ps.externalForces; forces.enabled = true; }
void Update() { m_ForceField.shape = m_Shape; m_ForceField.startRange = m_StartRange; m_ForceField.endRange = m_EndRange; m_ForceField.directionX = m_Direction.x; m_ForceField.directionY = m_Direction.y; m_ForceField.directionZ = m_Direction.z; m_ForceField.gravity = m_Gravity; m_ForceField.gravityFocus = m_GravityFocus; m_ForceField.rotationSpeed = m_RotationSpeed; m_ForceField.rotationAttraction = m_RotationAttraction; m_ForceField.rotationRandomness = m_RotationRandomness; m_ForceField.drag = m_Drag; m_ForceField.multiplyDragByParticleSize = m_MultiplyDragByParticleSize; m_ForceField.multiplyDragByParticleVelocity = m_MultiplyDragByParticleVelocity; }
void OnGUI() { GUIContent[] shapeLabels = Enum.GetNames(typeof(ParticleSystemForceFieldShape)).Select(n => new GUIContent(n)).ToArray(); m_Shape = (ParticleSystemForceFieldShape)GUI.SelectionGrid(new Rect(25, 25, 400, 25), (int)m_Shape, shapeLabels, 4);
float y = 80.0f; float spacing = 40.0f;
GUI.Label(new Rect(25, y, 140, 30), "Start Range"); m_StartRange = GUI.HorizontalSlider(new Rect(165, y + 5, 100, 30), m_StartRange, 0.0f, 2.0f); y += spacing;
GUI.Label(new Rect(25, y, 140, 30), "End Range"); m_EndRange = GUI.HorizontalSlider(new Rect(165, y + 5, 100, 30), m_EndRange, 2.0f, 3.0f); y += spacing;
GUI.Label(new Rect(25, y, 140, 30), "Direction"); m_Direction.x = GUI.HorizontalSlider(new Rect(165, y + 5, 40, 30), m_Direction.x, -1.0f, 1.0f); m_Direction.y = GUI.HorizontalSlider(new Rect(210, y + 5, 40, 30), m_Direction.y, -1.0f, 1.0f); m_Direction.z = GUI.HorizontalSlider(new Rect(255, y + 5, 40, 30), m_Direction.z, -1.0f, 1.0f); y += spacing;
GUI.Label(new Rect(25, y, 140, 30), "Gravity"); m_Gravity = GUI.HorizontalSlider(new Rect(165, y + 5, 100, 30), m_Gravity, -0.05f, 0.05f); y += spacing;
GUI.Label(new Rect(25, y, 140, 30), "Gravity Focus"); m_GravityFocus = GUI.HorizontalSlider(new Rect(165, y + 5, 100, 30), m_GravityFocus, 0.0f, 1.0f); y += spacing;
GUI.Label(new Rect(25, y, 140, 30), "Rotation Speed"); m_RotationSpeed = GUI.HorizontalSlider(new Rect(165, y + 5, 100, 30), m_RotationSpeed, -10.0f, 10.0f); y += spacing;
GUI.Label(new Rect(25, y, 140, 30), "Rotation Attraction"); m_RotationAttraction = GUI.HorizontalSlider(new Rect(165, y + 5, 100, 30), m_RotationAttraction, 0.0f, 0.01f); y += spacing;
GUI.Label(new Rect(25, y, 140, 30), "Rotation Randomness"); m_RotationRandomness.x = GUI.HorizontalSlider(new Rect(165, y + 5, 60, 30), m_RotationRandomness.x, 0.0f, 1.0f); m_RotationRandomness.y = GUI.HorizontalSlider(new Rect(230, y + 5, 60, 30), m_RotationRandomness.y, 0.0f, 1.0f); y += spacing;
GUI.Label(new Rect(25, y, 140, 30), "Drag"); m_Drag = GUI.HorizontalSlider(new Rect(165, y + 5, 100, 30), m_Drag, 0.0f, 20.0f); y += spacing;
m_MultiplyDragByParticleSize = GUI.Toggle(new Rect(25, y, 220, 30), m_MultiplyDragByParticleSize, "Multiply Drag by Particle Size"); y += spacing;
m_MultiplyDragByParticleVelocity = GUI.Toggle(new Rect(25, y, 220, 30), m_MultiplyDragByParticleVelocity, "Multiply Drag by Particle Velocity"); y += spacing; } }
directionX | Apply a linear force along the local X axis to particles within the volume of the Force Field. |
directionY | Apply a linear force along the local Y axis to particles within the volume of the Force Field. |
directionZ | Apply a linear force along the local Z axis to particles within the volume of the Force Field. |
drag | Apply drag to particles within the volume of the Force Field. |
endRange | Determines the size of the shape used for influencing particles. |
gravity | Apply gravity to particles within the volume of the Force Field. |
gravityFocus | When using the gravity force, set this value between 0 and 1 to control the focal point of the gravity effect. |
length | Describes the length of the Cylinder when using the Cylinder Force Field shape to influence particles. |
multiplyDragByParticleSize | When using Drag, the drag strength will be multiplied by the size of the particles if this toggle is enabled. |
multiplyDragByParticleVelocity | When using Drag, the drag strength will be multiplied by the speed of the particles if this toggle is enabled. |
rotationAttraction | Controls how strongly particles are dragged into the vortex motion. |
rotationRandomness | Apply randomness to the Force Field axis that particles will travel around. |
rotationSpeed | The speed at which particles are propelled around a vortex. |
shape | Selects the type of shape used for influencing particles. |
startRange | Setting a value greater than 0 creates a hollow Force Field shape. This will cause particles to not be affected by the Force Field when closer to the center of the volume than the startRange property. |
vectorField | Apply forces to particles within the volume of the Force Field, by using a 3D texture containing vector field data. |
vectorFieldAttraction | Controls how strongly particles are dragged into the vector field motion. |
vectorFieldSpeed | The speed at which particles are propelled through the vector field. |
enabled | 有効であれば更新され、無効であれば更新されません。 |
isActiveAndEnabled | Reports whether a GameObject and its associated Behaviour is active and enabled. |
gameObject | このコンポーネントはゲームオブジェクトにアタッチされます。コンポーネントはいつもゲームオブジェクトにアタッチされています。 |
tag | ゲームオブジェクトのタグ |
transform | The Transform attached to this GameObject. |
hideFlags | Should the object be hidden, saved with the Scene or modifiable by the user? |
name | オブジェクト名 |
BroadcastMessage | ゲームオブジェクトまたは子オブジェクトにあるすべての MonoBehaviour を継承したクラスにある methodName 名のメソッドを呼び出します。 |
CompareTag | Checks the GameObject's tag against the defined tag. |
GetComponent | Returns the component of type if the GameObject has one attached. |
GetComponentInChildren | Returns the Component of type in the GameObject or any of its children using depth first search. |
GetComponentInParent | Returns the Component of type in the GameObject or any of its parents. |
GetComponents | GameObject から type のタイプのコンポーネントを「すべて」取得します。 |
GetComponentsInChildren | Returns all components of Type type in the GameObject or any of its children. Works recursively. |
GetComponentsInParent | GameObject や深さ優先探索を活用して、親子関係にある親オブジェクトから type のタイプのコンポーネントを「すべて」取得します。 |
SendMessage | ゲームオブジェクトにアタッチされているすべての MonoBehaviour にある methodName と名付けたメソッドを呼び出します |
SendMessageUpwards | ゲームオブジェクトと親(の親、さらに親 ... )にアタッチされているすべての MonoBehaviour にある methodName と名付けたメソッドを呼び出します |
TryGetComponent | Gets the component of the specified type, if it exists. |
GetInstanceID | Gets the instance ID of the object. |
ToString | Returns the name of the object. |
Destroy | Removes a GameObject, component or asset. |
DestroyImmediate | Destroys the object obj immediately. You are strongly recommended to use Destroy instead. |
DontDestroyOnLoad | Do not destroy the target Object when loading a new Scene. |
FindObjectOfType | タイプ type から最初に見つけたアクティブのオブジェクトを返します |
FindObjectsOfType | Gets a list of all loaded objects of Type type. |
Instantiate | original のオブジェクトをクローンします |
bool | オブジェクトが存在するかどうか |
operator != | 二つのオブジェクトが異なるオブジェクトを参照しているか比較します |
operator == | 2つのオブジェクト参照が同じオブジェクトを参照しているか比較します。 |