301 lines
12 KiB
C#
301 lines
12 KiB
C#
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#if !UNITY_2019_1_OR_NEWER
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#define CINEMACHINE_TIMELINE
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#endif
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#if CINEMACHINE_TIMELINE
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using UnityEngine;
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using UnityEngine.Playables;
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using Cinemachine;
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using System.Collections.Generic;
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//namespace Cinemachine.Timeline
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//{
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internal sealed class CinemachineMixer : PlayableBehaviour
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{
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public delegate PlayableDirector MasterDirectorDelegate();
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static public MasterDirectorDelegate GetMasterPlayableDirector;
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// The brain that this track controls
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private CinemachineBrain mBrain;
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private int mBrainOverrideId = -1;
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private bool mPreviewPlay;
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#if UNITY_EDITOR && UNITY_2019_2_OR_NEWER
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class ScrubbingCacheHelper
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{
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// Remember the active clips of the previous frame so we can track camera cuts
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public int ActivePlayableA;
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public int ActivePlayableB;
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struct ClipObjects
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{
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public List<List<CinemachineVirtualCameraBase>> Cameras;
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public float MaxDampTime;
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}
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List<ClipObjects> CachedObjects;
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static List<CinemachineVirtualCameraBase> scratch = new List<CinemachineVirtualCameraBase>();
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public void Init(Playable playable)
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{
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// Build our vcam registry for scrubbing updates
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CachedObjects = new List<ClipObjects>(playable.GetInputCount());
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for (int i = 0; i < playable.GetInputCount(); ++i)
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{
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var cs = new ClipObjects
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{
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Cameras = new List<List<CinemachineVirtualCameraBase>>(),
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};
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var clip = (ScriptPlayable<CinemachineShotPlayable>)playable.GetInput(i);
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CinemachineShotPlayable shot = clip.GetBehaviour();
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if (shot != null && shot.IsValid)
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{
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var mainVcam = shot.VirtualCamera;
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cs.Cameras.Add(new List<CinemachineVirtualCameraBase>());
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// Add all child cameras
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scratch.Clear();
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mainVcam.GetComponentsInChildren(scratch);
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for (int j = 0; j < scratch.Count; ++j)
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{
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var vcam = scratch[j];
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int nestLevel = 0;
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for (ICinemachineCamera p = vcam.ParentCamera;
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p != null && p != (ICinemachineCamera)mainVcam; p = p.ParentCamera)
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{
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++nestLevel;
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}
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while (cs.Cameras.Count <= nestLevel)
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cs.Cameras.Add(new List<CinemachineVirtualCameraBase>());
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cs.Cameras[nestLevel].Add(vcam);
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cs.MaxDampTime = Mathf.Max(cs.MaxDampTime, vcam.GetMaxDampTime());
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}
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}
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CachedObjects.Add(cs);
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}
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}
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public void ScrubToHere(float currentTime, int playableIndex, bool isCut, float timeInClip, Vector3 up)
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{
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TargetPositionCache.CurrentTime = currentTime;
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if (TargetPositionCache.CacheMode == TargetPositionCache.Mode.Record)
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{
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// If the clip is newly activated, force the time to clip start,
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// in case timeline skipped some frames. This will avoid target lerps between shots.
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if (Time.frameCount != TargetPositionCache.CurrentFrame)
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TargetPositionCache.IsCameraCut = false;
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TargetPositionCache.CurrentFrame = Time.frameCount;
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if (isCut)
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TargetPositionCache.IsCameraCut = true;
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return;
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}
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if (!TargetPositionCache.HasCurrentTime)
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return;
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var cs = CachedObjects[playableIndex];
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float stepSize = TargetPositionCache.CacheStepSize;
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// Impose upper limit on damping time, to avoid simulating too many frames
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float maxDampTime = Mathf.Max(0, timeInClip - stepSize);
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maxDampTime = Mathf.Min(cs.MaxDampTime, Mathf.Min(maxDampTime, 4.0f));
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var endTime = TargetPositionCache.CurrentTime;
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var startTime = Mathf.Max(
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TargetPositionCache.CacheTimeRange.Start + stepSize, endTime - maxDampTime);
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var numSteps = Mathf.FloorToInt((endTime - startTime) / stepSize);
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for (int step = numSteps; step >= 0; --step)
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{
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var t = Mathf.Max(startTime, endTime - step * stepSize);
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TargetPositionCache.CurrentTime = t;
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var deltaTime = (step == numSteps) ? -1
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: (t - startTime < stepSize ? t - startTime : stepSize);
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// Update all relevant vcams, leaf-most first
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for (int i = cs.Cameras.Count - 1; i >= 0; --i)
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{
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var sublist = cs.Cameras[i];
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for (int j = sublist.Count - 1; j >= 0; --j)
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{
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var vcam = sublist[j];
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if (deltaTime < 0)
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vcam.ForceCameraPosition(
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TargetPositionCache.GetTargetPosition(vcam.transform),
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TargetPositionCache.GetTargetRotation(vcam.transform));
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vcam.InternalUpdateCameraState(up, deltaTime);
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}
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}
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}
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}
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}
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ScrubbingCacheHelper m_ScrubbingCacheHelper;
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#endif
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#if UNITY_EDITOR && UNITY_2019_2_OR_NEWER
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public override void OnGraphStart(Playable playable)
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{
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base.OnGraphStart(playable);
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m_ScrubbingCacheHelper = null;
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}
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#endif
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public override void OnPlayableDestroy(Playable playable)
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{
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if (mBrain != null)
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mBrain.ReleaseCameraOverride(mBrainOverrideId); // clean up
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mBrainOverrideId = -1;
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#if UNITY_EDITOR && UNITY_2019_2_OR_NEWER
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m_ScrubbingCacheHelper = null;
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#endif
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}
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public override void PrepareFrame(Playable playable, FrameData info)
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{
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mPreviewPlay = false;
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#if UNITY_EDITOR && UNITY_2019_2_OR_NEWER
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var cacheMode = TargetPositionCache.Mode.Disabled;
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if (!Application.isPlaying)
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{
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if (GetMasterPlayableDirector != null)
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{
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var d = GetMasterPlayableDirector();
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if (d != null && d.playableGraph.IsValid())
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mPreviewPlay = GetMasterPlayableDirector().playableGraph.IsPlaying();
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}
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if (TargetPositionCache.UseCache)
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{
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cacheMode = mPreviewPlay ? TargetPositionCache.Mode.Record : TargetPositionCache.Mode.Playback;
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if (m_ScrubbingCacheHelper == null)
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{
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m_ScrubbingCacheHelper = new ScrubbingCacheHelper();
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m_ScrubbingCacheHelper.Init(playable);
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}
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}
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}
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TargetPositionCache.CacheMode = cacheMode;
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#endif
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}
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public override void ProcessFrame(Playable playable, FrameData info, object playerData)
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{
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base.ProcessFrame(playable, info, playerData);
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// Get the brain that this track controls.
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// Older versions of timeline sent the gameObject by mistake.
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GameObject go = playerData as GameObject;
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if (go == null)
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mBrain = (CinemachineBrain)playerData;
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else
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mBrain = go.GetComponent<CinemachineBrain>();
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if (mBrain == null)
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return;
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// Find which clips are active. We can process a maximum of 2.
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// In the case that the weights don't add up to 1, the outgoing weight
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// will be calculated as the inverse of the incoming weight.
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int activeInputs = 0;
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int clipIndexA = -1;
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int clipIndexB = -1;
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bool incomingIsA = false; // Assume that incoming clip is clip B
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float weightB = 1;
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for (int i = 0; i < playable.GetInputCount(); ++i)
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{
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float weight = playable.GetInputWeight(i);
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var clip = (ScriptPlayable<CinemachineShotPlayable>)playable.GetInput(i);
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CinemachineShotPlayable shot = clip.GetBehaviour();
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if (shot != null && shot.IsValid
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&& playable.GetPlayState() == PlayState.Playing
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&& weight > 0)
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{
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clipIndexA = clipIndexB;
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clipIndexB = i;
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weightB = weight;
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if (++activeInputs == 2)
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{
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// Deduce which clip is incoming (timeline doesn't know)
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var clipA = playable.GetInput(clipIndexA);
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// Incoming has later start time (therefore earlier current time)
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incomingIsA = clip.GetTime() >= clipA.GetTime();
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// If same start time, longer clip is incoming
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if (clip.GetTime() == clipA.GetTime())
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incomingIsA = clip.GetDuration() < clipA.GetDuration();
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break;
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}
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}
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}
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// Special case: check for only one clip that's fading out - it must be outgoing
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if (activeInputs == 1 && weightB < 1
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&& playable.GetInput(clipIndexB).GetTime() > playable.GetInput(clipIndexB).GetDuration() / 2)
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{
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incomingIsA = true;
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}
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if (incomingIsA)
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{
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(clipIndexA, clipIndexB) = (clipIndexB, clipIndexA);
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weightB = 1 - weightB;
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}
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ICinemachineCamera camA = null;
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if (clipIndexA >= 0)
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{
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CinemachineShotPlayable shot
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= ((ScriptPlayable<CinemachineShotPlayable>)playable.GetInput(clipIndexA)).GetBehaviour();
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camA = shot.VirtualCamera;
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}
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ICinemachineCamera camB = null;
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if (clipIndexB >= 0)
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{
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CinemachineShotPlayable shot
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= ((ScriptPlayable<CinemachineShotPlayable>)playable.GetInput(clipIndexB)).GetBehaviour();
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camB = shot.VirtualCamera;
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}
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// Override the Cinemachine brain with our results
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mBrainOverrideId = mBrain.SetCameraOverride(
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mBrainOverrideId, camA, camB, weightB, GetDeltaTime(info.deltaTime));
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#if UNITY_EDITOR && UNITY_2019_2_OR_NEWER
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if (m_ScrubbingCacheHelper != null && TargetPositionCache.CacheMode != TargetPositionCache.Mode.Disabled)
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{
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bool isNewB = (m_ScrubbingCacheHelper.ActivePlayableA != clipIndexB
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&& m_ScrubbingCacheHelper.ActivePlayableB != clipIndexB);
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m_ScrubbingCacheHelper.ActivePlayableA = clipIndexA;
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m_ScrubbingCacheHelper.ActivePlayableB = clipIndexB;
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if (clipIndexA >= 0)
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m_ScrubbingCacheHelper.ScrubToHere(
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(float)GetMasterPlayableDirector().time, clipIndexA, false,
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(float)playable.GetInput(clipIndexA).GetTime(), mBrain.DefaultWorldUp);
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if (clipIndexB >= 0)
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m_ScrubbingCacheHelper.ScrubToHere(
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(float)GetMasterPlayableDirector().time, clipIndexB, isNewB && weightB > 0.99f,
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(float)playable.GetInput(clipIndexB).GetTime(), mBrain.DefaultWorldUp);
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}
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#endif
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}
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float GetDeltaTime(float deltaTime)
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{
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if (mPreviewPlay || Application.isPlaying)
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return deltaTime;
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// We're scrubbing or paused
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if (TargetPositionCache.CacheMode == TargetPositionCache.Mode.Playback
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&& TargetPositionCache.HasCurrentTime)
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{
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return 0;
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}
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return -1;
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}
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}
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//}
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#endif
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