95 lines
3.9 KiB
C#
95 lines
3.9 KiB
C#
using System;
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using System.Collections.Generic;
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using SLSUtilities.General;
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using UI_Spline_Renderer;
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using Unity.Mathematics;
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using UnityEngine;
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using UnityEngine.Splines;
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using UnityEngine.UI;
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namespace Continentis.MainGame.UI
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{
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public class PointerArrow : MonoBehaviour
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{
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[Tooltip("箭头起点的Transform（例如：正在拖拽的卡牌）")]
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public RectTransform startPoint;
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[Tooltip("箭头线条")]
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public SplineContainer splineContainer;
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public UISplineRenderer arrowBody;
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[Tooltip("箭头头部的图片")]
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public Image endImage;
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[Header("曲线设置")]
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[Tooltip("曲线的弯曲程度，数值越大越弯曲")]
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public float curveOffset = 150f;
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[Tooltip("曲线的平滑度，点越多越平滑，性能开销也越大")]
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[Range(1, 100)]
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public int lineSegments = 50;
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private void Awake()
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{
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GetComponent<Canvas>().sortingLayerName = "UI";
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}
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public void SetArrow(Vector3 start, Vector3 end)
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{
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startPoint.position = start;
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Camera uiCamera = CombatUIManager.Instance.uiCamera;
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Camera worldCamera = CombatUIManager.Instance.combatCamera;
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RectTransform pageTransform = CombatUIManager.Instance.arrowsPage.rectTransform;
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Vector2 uiStart = SpaceConverter.WorldPointToUILocalPoint(pageTransform, start, uiCamera, worldCamera);
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Vector2 uiEnd = SpaceConverter.WorldPointToUILocalPoint(pageTransform, end, uiCamera, worldCamera);
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bool isEndOnLeftSide = uiEnd.x < uiStart.x;
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// 控制点在起点和终点的中点，并根据朝向进行偏移，使曲线更自然
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Vector2 midPoint = (uiStart + uiEnd) / 2f;
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Vector2 direction = (uiEnd - uiStart).normalized;
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Vector2 perpendicular = new Vector2(-direction.y, direction.x); // 计算垂直向量
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Vector2 controlPoint = midPoint + perpendicular * (isEndOnLeftSide ? -curveOffset : curveOffset);
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controlPoint += new Vector2(0, Mathf.Abs(uiEnd.y - uiStart.y)); //增加一些垂直偏移
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//controlPoint += new Vector2(0f, 500f);
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splineContainer.Spline.Clear();
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// 2. 计算贝塞尔曲线上所有的点
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List<BezierKnot> knots = new List<BezierKnot>();
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for (int i = 0; i < lineSegments; i++)
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{
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float t = (float)i / (lineSegments - 1);
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// 二次贝塞尔曲线公式: B(t) = (1-t)² * P₀ + 2(1-t)t * P₁ + t² * P₂
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float3 point = math.pow(1 - t, 2) * new float3(uiStart.x, uiStart.y, 0) +
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2 * (1 - t) * t * new float3(controlPoint.x, controlPoint.y, 0) +
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math.pow(t, 2) * new float3(uiEnd.x, uiEnd.y, 0);
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knots.Add(new BezierKnot(point));
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}
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splineContainer.Spline.Knots = knots;
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arrowBody.SetAllDirty(); // 通知UI系统重绘
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}
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public void SetColor(Color color)
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{
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if (color == Color.clear)
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{
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endImage.material.SetFloat("_SineGlowFade", 0);
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arrowBody.material.SetFloat("_SineGlowFade", 0);
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endImage.material.SetColor("_SineGlowColor", Color.white);
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arrowBody.material.SetColor("_SineGlowColor", Color.white);
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}
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else
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{
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float emissionIntensity = 1.5f;
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endImage.material.SetFloat("_SineGlowFade", 1);
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arrowBody.material.SetFloat("_SineGlowFade", 1);
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endImage.material.SetColor("_SineGlowColor", color * Mathf.Pow(2, emissionIntensity));
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arrowBody.material.SetColor("_SineGlowColor", color * Mathf.Pow(2, emissionIntensity));
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}
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}
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}
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}
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