Added new FIFO based UI Line Render when dynamic line rendering is needed (basic, no Beziers)
Resolves: https://github.com/Unity-UI-Extensions/com.unity.uiextensions/issues/324pull/413/head
Simon Jackson
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/// Credit Steve Westhoff, jack.sydorenko, firagon
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/// Sourced from - https://bitbucket.org/UnityUIExtensions/unity-ui-extensions/issues/324
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/// Refactored and updated for performance from UILineRenderer by Steve Westhoff
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using System.Collections.Generic;
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namespace UnityEngine.UI.Extensions
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{
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[AddComponentMenu("UI/Extensions/Primitives/UILineRendererFIFO")]
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[RequireComponent(typeof(RectTransform))]
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public class UILineRendererFIFO : UIPrimitiveBase
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{
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private static readonly Vector2[] middleUvs = new[] { new Vector2(0.5f, 0), new Vector2(0.5f, 1), new Vector2(0.5f, 1), new Vector2(0.5f, 0) };
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private List<Vector2> addedPoints = new List<Vector2>();
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private bool needsResize;
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[SerializeField, Tooltip("Thickness of the line")]
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private float lineThickness = 1;
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[SerializeField, Tooltip("Points to draw lines between\n Can be improved using the Resolution Option")]
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private List<Vector2> points = new List<Vector2>();
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[SerializeField, Tooltip("Segments to be drawn\n This is a list of arrays of points")]
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private List<UIVertex[]> segments = new List<UIVertex[]>();
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/// <summary>
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/// Thickness of the line
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/// </summary>
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public float LineThickness
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{
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get { return lineThickness; }
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set { lineThickness = value; SetAllDirty(); }
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}
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/// <summary>
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/// Points to be drawn in the line.
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/// </summary>
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/// <remarks>Don't add points to the list directly, use the add / remove functions</remarks>
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public List<Vector2> Points
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{
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get
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{
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return points;
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}
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set
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{
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if (points == value)
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return;
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points = value;
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SetAllDirty();
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}
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}
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/// <summary>
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/// Adds to head
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/// </summary>
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/// <param name="point"></param>
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public void AddPoint(Vector2 point) {
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points.Add(point);
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addedPoints.Add(point);
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}
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/// <summary>
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/// Removes from tail (FIFO)
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/// </summary>
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public void RemovePoint() {
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points.RemoveAt(0);
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needsResize = true;
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}
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/// <summary>
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/// Clear all the points from the LineRenderer
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/// </summary>
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public void ClearPoints()
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{
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segments.Clear();
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points.Clear();
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addedPoints.Clear();
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needsResize = false;
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}
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public void Resize() {
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needsResize = true;
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}
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protected override void OnPopulateMesh(VertexHelper vertexHelper) {
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vertexHelper.Clear();
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if(needsResize) {
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needsResize = false;
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segments.Clear();
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addedPoints = new List<Vector2>(points);
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}
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int count = addedPoints.Count;
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if(count > 1) {
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PopulateMesh(addedPoints, vertexHelper);
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if(count % 2 == 0) {
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addedPoints.Clear();
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} else {
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Vector2 extraPoint = addedPoints[count - 1];
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addedPoints.Clear();
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addedPoints.Add(extraPoint);
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}
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}
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}
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void PopulateMesh(List<Vector2> pointsToDraw, VertexHelper vertexHelper) {
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if(ImproveResolution != ResolutionMode.None) {
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pointsToDraw = IncreaseResolution(pointsToDraw);
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}
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float sizeX = rectTransform.rect.width;
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float sizeY = rectTransform.rect.height;
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float offsetX = -rectTransform.pivot.x * sizeX;
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float offsetY = -rectTransform.pivot.y * sizeY;
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for(int i = 1; i < pointsToDraw.Count; i += 2) {
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Vector2 start = pointsToDraw[i - 1];
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Vector2 end = pointsToDraw[i];
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start = new Vector2(start.x * sizeX + offsetX, start.y * sizeY + offsetY);
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end = new Vector2(end.x * sizeX + offsetX, end.y * sizeY + offsetY);
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UIVertex[] segment = CreateLineSegment(start, end, segments.Count > 1 ? segments[segments.Count - 2] : null);
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segments.Add(segment);
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}
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for(int i = 0; i < segments.Count; i++) {
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vertexHelper.AddUIVertexQuad(segments[i]);
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}
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if(vertexHelper.currentVertCount > 64000) {
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Debug.LogError("Max Verticies size is 64000, current mesh vertcies count is [" + vertexHelper.currentVertCount + "] - Cannot Draw");
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vertexHelper.Clear();
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}
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}
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UIVertex[] CreateLineSegment(Vector2 start, Vector2 end, UIVertex[] previousVert = null) {
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Vector2 offset = new Vector2(start.y - end.y, end.x - start.x).normalized * lineThickness * 0.5f;
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Vector2 v1;
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Vector2 v2;
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if(previousVert != null) {
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v1 = new Vector2(previousVert[3].position.x, previousVert[3].position.y);
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v2 = new Vector2(previousVert[2].position.x, previousVert[2].position.y);
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} else {
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v1 = start - offset;
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v2 = start + offset;
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}
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return SetVbo(new[] { v1, v2, end + offset, end - offset }, middleUvs);
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}
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}
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}
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@ -0,0 +1,11 @@
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fileFormatVersion: 2
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guid: a3a91607af301f241b9f0a860c720b21
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MonoImporter:
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externalObjects: {}
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serializedVersion: 2
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defaultReferences: []
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executionOrder: 0
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icon: {instanceID: 0}
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userData:
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assetBundleName:
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assetBundleVariant:
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@ -118,24 +118,6 @@ namespace UnityEngine.UI.Extensions
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}
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}
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// /// <summary>
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// /// List of Segments to be drawn.
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// /// </summary>
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// public List<Vector2[]> Segments
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//{
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// get
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// {
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// return m_segments;
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// }
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// set
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// {
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// m_segments = value;
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// SetAllDirty();
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// }
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//}
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public void AddPoint(Vector2 pointToAdd)
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{
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m_points.Add(pointToAdd);
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@ -298,15 +280,6 @@ namespace UnityEngine.UI.Extensions
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PopulateMesh (vh, m_points);
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}
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//else if (m_segments != null && m_segments.Count > 0) {
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// GeneratedUVs ();
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// vh.Clear ();
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// for (int s = 0; s < m_segments.Count; s++) {
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// Vector2[] pointsToDraw = m_segments [s];
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// PopulateMesh (vh, pointsToDraw);
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// }
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//}
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}
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private UIVertex[] CreateLineCap(Vector2 start, Vector2 end, SegmentType type)
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