93 lines
3.5 KiB
C#
93 lines
3.5 KiB
C#
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// Copyright (c) Pixel Crushers. All rights reserved.
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using UnityEngine;
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namespace PixelCrushers.DialogueSystem.SequencerCommands
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{
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/// <summary>
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/// Implements sequencer command: "LookAt(target, [, subject[, duration[, allAxes]]])", which rotates the
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/// subject to face the target.
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///
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/// Arguments:
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/// -# Target to look at. Can be speaker, listener, or the name of a game object. Default: listener.
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/// -# (Optional) The subject; can be speaker, listener, or the name of a game object. Default: speaker.
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/// -# (Optional) Duration in seconds.
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/// -# (Optional) allAxes to rotate on all axes, otherwise stays upright.
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/// </summary>
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[AddComponentMenu("")] // Hide from menu.
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public class SequencerCommandLookAt : SequencerCommand
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{
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private const float SmoothMoveCutoff = 0.05f;
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private Transform target;
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private Transform subject;
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private float duration;
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float startTime;
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float endTime;
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Quaternion originalRotation;
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Quaternion targetRotation;
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public void Start()
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{
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// Get the values of the parameters:
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target = GetSubject(0, sequencer.listener);
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subject = GetSubject(1);
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duration = GetParameterAsFloat(2, 0);
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bool yAxisOnly = !string.Equals(GetParameter(3), "allAxes", System.StringComparison.OrdinalIgnoreCase);
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if (DialogueDebug.logInfo) Debug.Log(string.Format(System.Globalization.CultureInfo.InvariantCulture, "{0}: Sequencer: LookAt({1}, {2}, {3})", new System.Object[] { DialogueDebug.Prefix, target, subject, duration }));
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if ((target == null) && DialogueDebug.logWarnings) Debug.LogWarning(string.Format("{0}: Sequencer: LookAt Target '{1}' wasn't found.", new System.Object[] { DialogueDebug.Prefix, GetParameter(0) }));
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if ((subject == null) && DialogueDebug.logWarnings) Debug.LogWarning(string.Format("{0}: Sequencer: LookAt Subject '{1}' wasn't found.", new System.Object[] { DialogueDebug.Prefix, GetParameter(1) }));
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// Set up the rotation:
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if ((subject != null) && (target != null) && (subject != target))
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{
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targetRotation = Quaternion.LookRotation(target.position - subject.position, Vector3.up);
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if (yAxisOnly) targetRotation = Quaternion.Euler(subject.rotation.eulerAngles.x, targetRotation.eulerAngles.y, subject.rotation.eulerAngles.z);
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if (duration > SmoothMoveCutoff)
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{
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startTime = DialogueTime.time;
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endTime = startTime + duration;
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originalRotation = subject.rotation;
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}
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else
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{
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Stop();
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}
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}
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else
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{
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Stop();
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}
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}
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public void Update()
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{
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// Keep smoothing for the specified duration:
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if (DialogueTime.time < endTime)
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{
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float elapsed = (DialogueTime.time - startTime) / duration;
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subject.rotation = Quaternion.Lerp(originalRotation, targetRotation, elapsed);
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}
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else
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{
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Stop();
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}
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}
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public void OnDestroy()
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{
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// Final rotation:
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if (subject != null && target != null)
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{
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subject.rotation = targetRotation;
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}
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}
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}
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}
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