89 lines
2.4 KiB
C#
89 lines
2.4 KiB
C#
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// UnityEngine.UI was moved to a package in 2019.2.0
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// Unfortunately no way to test for this across all Unity versions yet
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// You can set up the asmdef to reference the new package, but the package doesn't
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// existing in Unity 2017 etc, and it throws an error due to missing reference
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#define AVPRO_PACKAGE_UNITYUI
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#if (UNITY_2019_2_OR_NEWER && AVPRO_PACKAGE_UNITYUI) || (!UNITY_2019_2_OR_NEWER)
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using UnityEngine;
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using UnityEngine.UI;
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namespace RenderHeads.Media.AVProVideo.Demos.UI
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{
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/// Fill a rectangle region with horizontal segments along it
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[ExecuteInEditMode]
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public class HorizontalSegmentsPrimitive : Graphic
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{
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private float[] _segments = { 0f, 0f };
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public float[] Segments { get { return _segments; } set { SetSegments(value); } }
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private void SetSegments(float[] segments)
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{
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if (segments != null && segments.Length > 1)
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{
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_segments = segments;
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}
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else
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{
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_segments = new float[] { 0f, 0f };
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}
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// TODO: detect whether a change actually occured before setting to dirty
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SetVerticesDirty();
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}
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protected override void OnPopulateMesh(VertexHelper vh)
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{
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Vector2 corner1 = Vector2.zero;
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Vector2 corner2 = Vector2.zero;
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corner1.x = 0f;
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corner1.y = 0f;
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corner2.x = 1f;
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corner2.y = 1f;
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corner1.x -= rectTransform.pivot.x;
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corner1.y -= rectTransform.pivot.y;
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corner2.x -= rectTransform.pivot.x;
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corner2.y -= rectTransform.pivot.y;
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corner1.x *= rectTransform.rect.width;
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corner1.y *= rectTransform.rect.height;
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corner2.x *= rectTransform.rect.width;
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corner2.y *= rectTransform.rect.height;
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vh.Clear();
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int numQuads = _segments.Length / 2;
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UIVertex vert = UIVertex.simpleVert;
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int vi = 0;
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for (int i = 0; i < numQuads; i++)
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{
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float x1 = _segments[i * 2 + 0] * (corner2.x - corner1.x) + corner1.x;
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float x2 = _segments[i * 2 + 1] * (corner2.x - corner1.x) + corner1.x;
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vert.position = new Vector2(x1, corner1.y);
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vert.color = color;
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vh.AddVert(vert);
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vert.position = new Vector2(x1, corner2.y);
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vert.color = color;
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vh.AddVert(vert);
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vert.position = new Vector2(x2, corner2.y);
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vert.color = color;
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vh.AddVert(vert);
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vert.position = new Vector2(x2, corner1.y);
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vert.color = color;
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vh.AddVert(vert);
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vh.AddTriangle(0 + vi, 1 + vi, 2 + vi);
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vh.AddTriangle(2 + vi, 3 + vi, 0 + vi);
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vi += 4;
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}
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}
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}
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}
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#endif
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