75 lines
3.0 KiB
C#
75 lines
3.0 KiB
C#
using SoulliesFramework.General;
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using UnityEngine;
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using UnityEngine.UI;
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using UnityEngine.UI.Extensions;
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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 Image startPoint;
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[Tooltip("箭头线条")]
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public UILineRenderer arrowBody;
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[Tooltip("箭头头部的RectTransform")]
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public Image endPoint;
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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(20, 100)]
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public int lineSegments = 50;
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public void SetArrow(Vector3 start, Vector3 end)
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{
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startPoint.rectTransform.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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// 2. 计算贝塞尔曲线上所有的点
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Vector2[] points = new Vector2[lineSegments];
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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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points[i] = Mathf.Pow(1 - t, 2) * uiStart +
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2 * (1 - t) * t * controlPoint +
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Mathf.Pow(t, 2) * uiEnd;
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}
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arrowBody.Points = points;
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arrowBody.SetAllDirty(); // 通知UI系统重绘
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endPoint.rectTransform.localPosition = uiEnd;
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Vector2 headDirection = (uiEnd - points[lineSegments - 2]).normalized;
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float angle = Vector2.SignedAngle(Vector2.up, headDirection);
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endPoint.rectTransform.localRotation = Quaternion.Euler(0, 0, angle);
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}
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public void SetColor(Color color)
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{
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startPoint.color = color;
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endPoint.color = color;
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arrowBody.color = color;
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}
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}
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}
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