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70 行
3.2 KiB
70 行
3.2 KiB
using UnityEngine;
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using UnityEngine.Serialization;
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namespace Cinemachine
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{
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/// <summary>
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/// This is a very simple behaviour that constrains its transform to a CinemachinePath.
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/// It can be used to animate any objects along a path, or as a Follow target for
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/// Cinemachine Virtual Cameras.
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/// </summary>
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[DocumentationSorting(21f, DocumentationSortingAttribute.Level.UserRef)]
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[ExecuteInEditMode]
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public class CinemachineDollyCart : MonoBehaviour
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{
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/// <summary>The path to follow</summary>
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[Tooltip("The path to follow")]
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public CinemachinePathBase m_Path;
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/// <summary>This enum defines the options available for the update method.</summary>
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public enum UpdateMethod
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{
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/// <summary>Updated in normal MonoBehaviour Update.</summary>
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Update,
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/// <summary>Updated in sync with the Physics module, in FixedUpdate</summary>
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FixedUpdate
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};
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/// <summary>When to move the cart, if Velocity is non-zero</summary>
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[Tooltip("When to move the cart, if Velocity is non-zero")]
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public UpdateMethod m_UpdateMethod = UpdateMethod.Update;
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/// <summary>How to interpret the Path Position</summary>
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[Tooltip("How to interpret the Path Position. If set to Path Units, values are as follows: 0 represents the first waypoint on the path, 1 is the second, and so on. Values in-between are points on the path in between the waypoints. If set to Distance, then Path Position represents distance along the path.")]
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public CinemachinePathBase.PositionUnits m_PositionUnits = CinemachinePathBase.PositionUnits.Distance;
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/// <summary>Move the cart with this speed</summary>
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[Tooltip("Move the cart with this speed along the path. The value is interpreted according to the Position Units setting.")]
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[FormerlySerializedAs("m_Velocity")]
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public float m_Speed;
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/// <summary>The cart's current position on the path, in distance units</summary>
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[Tooltip("The position along the path at which the cart will be placed. This can be animated directly or, if the velocity is non-zero, will be updated automatically. The value is interpreted according to the Position Units setting.")]
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[FormerlySerializedAs("m_CurrentDistance")]
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public float m_Position;
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void FixedUpdate()
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{
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if (m_UpdateMethod == UpdateMethod.FixedUpdate)
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SetCartPosition(m_Position += m_Speed * Time.deltaTime);
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}
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void Update()
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{
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if (!Application.isPlaying)
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SetCartPosition(m_Position);
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else if (m_UpdateMethod == UpdateMethod.Update)
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SetCartPosition(m_Position += m_Speed * Time.deltaTime);
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}
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void SetCartPosition(float distanceAlongPath)
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{
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if (m_Path != null)
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{
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m_Position = m_Path.NormalizeUnit(distanceAlongPath, m_PositionUnits);
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transform.position = m_Path.EvaluatePositionAtUnit(m_Position, m_PositionUnits);
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transform.rotation = m_Path.EvaluateOrientationAtUnit(m_Position, m_PositionUnits);
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}
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}
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}
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}
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