MuHua-123
72 lines
2.0 KiB
C#
72 lines
2.0 KiB
C#
using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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using UnityEngine.Rendering;
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using UnityEngine.UIElements;
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public class CircularBar : VisualElement {
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public new class UxmlFactory : UxmlFactory<CircularBar, UxmlTraits> { }
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public new class UxmlTraits : VisualElement.UxmlTraits {
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private readonly UxmlFloatAttributeDescription Fill = new() { name = "fill", defaultValue = 0.1f };
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public override void Init(VisualElement ve, IUxmlAttributes bag, CreationContext cc) {
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base.Init(ve, bag, cc);
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var circularBar = ve as CircularBar;
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circularBar.Fill = Fill.GetValueFromBag(bag, cc);
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circularBar.UpdateValue();
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}
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}
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public readonly Material material;
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public readonly RenderTexture rt;
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public VisualElement visual;
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public float Fill { get; set; }
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public CircularBar() {
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visual = new VisualElement();
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visual.style.flexGrow = 1;
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hierarchy.Add(visual);
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var shader = Shader.Find("MuHua/UI/CircularBar");
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if (shader == null) {
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Debug.LogError("Failed to find Shader Graphs/CircularBar.");
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return;
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}
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material = new Material(shader);
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rt = new RenderTexture(128, 128, 0, RenderTextureFormat.ARGBFloat);
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Background background = Background.FromRenderTexture(rt);
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visual.style.backgroundImage = new StyleBackground(background);
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}
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public void UpdateValue(float fill) {
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Fill = fill;
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UpdateValue();
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}
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public void UpdateValue() {
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if (material == null) { return; }
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Texture2D texture = resolvedStyle.backgroundImage.texture;
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if (texture == null) { return; }
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material.SetFloat("_fill", Fill);
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CommandBuffer command = CommandBufferPool.Get();
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// 设置渲染目标为tempRTHandle
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CoreUtils.SetRenderTarget(command, rt);
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// 清除纹理内容
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CoreUtils.ClearRenderTarget(command, ClearFlag.All, Color.clear);
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// 渲染
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command.Blit(texture, rt, material, 0);
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Graphics.ExecuteCommandBuffer(command);
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CommandBufferPool.Release(command);
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Background background = Background.FromRenderTexture(rt);
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visual.style.backgroundImage = new StyleBackground(background);
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}
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}
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