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200 lines
7.4 KiB
200 lines
7.4 KiB
using System;
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using UnityEngine;
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namespace BansheeGz.BGSpline.Components
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{
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/// <summary>
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/// Visualize curve in Play mode with standard LineRenderer Component.
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/// This component updates LineRenderer vertex count & positions only
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/// </summary>
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[HelpURL("http://www.bansheegz.com/BGCurve/Cc/BGCcVisualizationLineRenderer")]
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[RequireComponent(typeof(LineRenderer))]
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[DisallowMultipleComponent]
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[
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CcDescriptor(
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Description = "Visualize curve with standard LineRenderer Unity component.",
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Name = "Cc Line Renderer",
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Image = "Assets/BansheeGz/BGCurve/Icons/Components/BGCcVisualizationLineRenderer123.png")
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]
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[AddComponentMenu("BansheeGz/BGCurve/Components/BGCcLineRenderer")]
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public class BGCcVisualizationLineRenderer : BGCcSplitterPolyline
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{
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//===============================================================================================
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// Events
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//===============================================================================================
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/// <summary>ui updated</summary>
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public event EventHandler ChangedVisualization;
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//===============================================================================================
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// Fields (Persistent)
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//===============================================================================================
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[SerializeField] [Tooltip("Update LineRenderer at Start method.")] private bool updateAtStart;
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/// <summary>If LineRenderer should be updated then Start is called </summary>
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public bool UpdateAtStart
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{
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get { return updateAtStart; }
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set { updateAtStart = value; }
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}
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//===============================================================================================
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// Editor stuff
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//===============================================================================================
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public override string Error
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{
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get { return ChoseMessage(base.Error, () => (LineRenderer == null) ? "LineRenderer is null" : null); }
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}
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public override string Warning
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{
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get
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{
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var warning = base.Warning;
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var lineRenderer = LineRenderer;
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if (lineRenderer == null) return warning;
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if (!lineRenderer.useWorldSpace)
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warning += "\r\nLineRenderer uses local space (LineRenderer.useWorldSpace=false)! " +
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"This is not optimal, especially if you plan to update a curve at runtime. Try to set LineRenderer.useWorldSpace to true";
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return warning.Length == 0 ? null : warning;
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}
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}
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public override string Info
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{
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get { return lineRenderer != null ? "LineRenderer uses " + PointsCount + " points" : "LineRenderer is null"; }
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}
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public override bool SupportHandles
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{
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get { return false; }
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}
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//===============================================================================================
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// Fields (Not persistent)
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//===============================================================================================
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//linerenderer cached
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private LineRenderer lineRenderer;
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/// <summary>Get Unity's LineRenderer component </summary>
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public LineRenderer LineRenderer
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{
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get
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{
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//do not replace with ??
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if (lineRenderer == null) lineRenderer = GetComponent<LineRenderer>();
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return lineRenderer;
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}
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}
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//===============================================================================================
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// Unity Callbacks
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//===============================================================================================
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// Use this for initialization
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public override void Start()
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{
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base.Start();
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if (updateAtStart) UpdateUI();
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else Math.EnsureMathIsCreated();
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}
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//===============================================================================================
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// Public functions
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//===============================================================================================
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//see parent for comments
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public override void AddedInEditor()
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{
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UpdateUI();
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}
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/// <summary>Update underlying Unity's LineRenderer component </summary>
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public void UpdateUI()
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{
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try
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{
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//have no idea how to cope with UndoRedo
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if (Math == null) return;
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}
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catch (MissingReferenceException)
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{
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return;
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}
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var math = Math.Math;
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if (math == null) return;
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LineRenderer lineRenderer;
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try
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{
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//have no idea how to cope with UndoRedo
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lineRenderer = LineRenderer;
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}
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catch (MissingReferenceException)
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{
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return;
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}
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if (lineRenderer == null) return;
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var curve = Curve;
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if (curve == null) return;
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if (math.SectionsCount == 0)
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{
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//not enough points
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#if UNITY_5_5 || UNITY_5_6
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lineRenderer.positionCount = 0;
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#else
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lineRenderer.SetVertexCount(0);
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#endif
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if (positions != null && positions.Count > 0 && ChangedVisualization != null) ChangedVisualization(this, null);
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positions.Clear();
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}
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else
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{
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//============== ok
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useLocal = !lineRenderer.useWorldSpace;
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var newPositions = Positions;
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//update LineRenderer
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var count = newPositions.Count;
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if (count > 0)
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{
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#if UNITY_5_5 || UNITY_5_6
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lineRenderer.positionCount = count;
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#else
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lineRenderer.SetVertexCount(count);
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#endif
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//the only way to get rid of GC is to use slow one-by-one setter unfortunately
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for (var i = 0; i < count; i++) lineRenderer.SetPosition(i, newPositions[i]);
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}
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else
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{
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#if UNITY_5_5 || UNITY_5_6
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lineRenderer.positionCount = 0;
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#else
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lineRenderer.SetVertexCount(0);
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#endif
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}
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if (ChangedVisualization != null) ChangedVisualization(this, null);
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}
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}
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//===============================================================================================
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// Private functions
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//===============================================================================================
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//math/curve is changed
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protected override void UpdateRequested(object sender, EventArgs e)
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{
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base.UpdateRequested(sender, e);
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UpdateUI();
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}
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}
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}
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