增加卷边

2025-05-17 04:36:56 +08:00
parent 7b8c648f66
commit b8709a86e7
2 changed files with 225 additions and 119 deletions
@@ -9,14 +9,10 @@ public class GearFollower : MonoBehaviour
    public float detachDistance = 1.0f;
    public float tractionSpeed = 2f;

-    [Header("切割效果参数")]
-    public float cutEdgeExpandDuration = 0.5f;   // 卷边展开时间
-    public float cutEdgeCoolDuration = 3f;       // 冷却时间
-    public float cutEdgeMaxOffset = 0.05f;       // 卷边最大偏移量
-
-    public Gradient cutEdgeColorGradient;        // 颜色渐变（从高温到冷却）
-
-    public Material cutEdgeMaterial;              // 用于绘制卷边的材质
+    [Header("切割轨迹")]
+    public LineRenderer cutLineRenderer;
+    public float cutLineWidth = 0.1f;
+    public float noiseAmount = 0.05f;  // 毛刺偏移幅度

    private List<Vector2> edgePoints;
    private int currentEdgeIndex = 0;
@@ -27,19 +23,24 @@ public class GearFollower : MonoBehaviour

    private Camera mainCamera;

-    // 记录切割的边段及其动画状态
-    private class CutSegment
-    {
-        public int startIndex;
-        public float timeElapsed;  // 0~卷边展开+冷却总时长
-        public LineRenderer lineRenderer;
-    }
-    private List<CutSegment> cutSegments = new List<CutSegment>();
+    private List<Vector3> cutLinePoints = new List<Vector3>();
+    private bool isCutting = false;
+
+    private float directionSwitchCooldown = 0.2f;
+    private float directionSwitchTimer = 0f;

    void Start()
    {
        mainCamera = Camera.main;
        LoadEdgePointsFromSprite();
+
+        if (cutLineRenderer != null)
+        {
+            cutLineRenderer.positionCount = 0;
+            cutLineRenderer.widthCurve = AnimationCurve.Constant(0, 1, cutLineWidth);
+            cutLineRenderer.material = new Material(Shader.Find("Sprites/Default"));
+            cutLineRenderer.numCapVertices = 0; // 线头不圆滑，显锐利
+        }
    }

    void Update()
@@ -60,8 +61,6 @@ public class GearFollower : MonoBehaviour
                UpdateTractionState(mouseWorldPos);
                break;
        }
-
-        UpdateCutSegments();
    }

    private void LoadEdgePointsFromSprite()
@@ -82,7 +81,7 @@ public class GearFollower : MonoBehaviour
            return;
        }

-        float desiredSegmentLength = 0.1f; // 你可以根据需要调整这个值
+        float desiredSegmentLength = 0.1f;

        edgePoints.Clear();

@@ -102,7 +101,6 @@ public class GearFollower : MonoBehaviour
            }
        }

-        // 确保闭环
        if ((edgePoints[0] - edgePoints[edgePoints.Count - 1]).sqrMagnitude > 0.0001f)
        {
            edgePoints.Add(edgePoints[0]);
@@ -120,7 +118,6 @@ public class GearFollower : MonoBehaviour
        {
            currentEdgeIndex = nearestIndex;

-            // 判断应该向前还是向后吸附
            Vector2 prev = edgePoints[WrapIndex(currentEdgeIndex - 1)];
            Vector2 next = edgePoints[WrapIndex(currentEdgeIndex + 1)];

@@ -134,9 +131,6 @@ public class GearFollower : MonoBehaviour
        }
    }

-    private float directionSwitchCooldown = 0.2f;
-    private float directionSwitchTimer = 0f;
-
    private void UpdateTractionState(Vector2 mousePos)
    {
        Vector2 gearPos = transform.position;
@@ -144,25 +138,29 @@ public class GearFollower : MonoBehaviour
        if (Vector2.Distance(mousePos, gearPos) > detachDistance)
        {
            currentState = State.Follow;
+            EndCutting();
            return;
        }

        if (!Input.GetMouseButton(0))
        {
-            // 不按左键不移动
+            EndCutting();
            return;
        }

+        if (!isCutting)
+        {
+            StartCutting();
+        }
+
        int nextIndex = WrapIndex(currentEdgeIndex + tractionDirection);
        Vector2 from = edgePoints[currentEdgeIndex];
        Vector2 to = edgePoints[nextIndex];

-        // 方向判断优化：使用角度判断是否反方向
        Vector2 forward = (to - from).normalized;
        Vector2 toMouse = (mousePos - from).normalized;
-        float angle = Vector2.SignedAngle(forward, toMouse); // -180 ~ 180
+        float angle = Vector2.SignedAngle(forward, toMouse);

-        // 当角度大于120度，说明鼠标方向明显是反的
        if (Mathf.Abs(angle) > 120f)
        {
            directionSwitchTimer += Time.deltaTime;
@@ -171,7 +169,6 @@ public class GearFollower : MonoBehaviour
                tractionDirection *= -1;
                directionSwitchTimer = 0f;

-                // 更新前进段
                nextIndex = WrapIndex(currentEdgeIndex + tractionDirection);
                from = edgePoints[currentEdgeIndex];
                to = edgePoints[nextIndex];
@@ -193,12 +190,8 @@ public class GearFollower : MonoBehaviour
        {
            transform.position = targetPoint;

-            // 如果到达段末，前进一段
            if (Vector2.Distance(targetPoint, to) < 0.01f)
            {
-                // 记录切割痕迹
-                AddCutSegment(currentEdgeIndex);
-
                currentEdgeIndex = nextIndex;
            }
        }
@@ -206,85 +199,43 @@ public class GearFollower : MonoBehaviour
        {
            transform.position += (Vector3)(moveDir.normalized * maxStep);
        }
+
+        // 记录切割点（带噪声模拟毛糙）
+        Vector3 noisyPoint = transform.position;
+        noisyPoint.x += Random.Range(-noiseAmount, noiseAmount);
+        noisyPoint.y += Random.Range(-noiseAmount, noiseAmount);
+        AddCutPoint(noisyPoint);
    }

-    // 添加一个切割段，生成卷边视觉效果
-    private void AddCutSegment(int startIndex)
+    private void StartCutting()
    {
-        // 防止重复添加同一段（可选）
-        foreach (var seg in cutSegments)
+        isCutting = true;
+        //cutLinePoints.Clear();
+        if (cutLineRenderer != null)
        {
-            if (seg.startIndex == startIndex)
-                return;
+            cutLineRenderer.positionCount = 0;
        }
-
-        GameObject go = new GameObject($"CutSegment_{startIndex}");
-        go.transform.parent = transform.parent; // 放在GearFollower同级方便管理
-
-        LineRenderer lr = go.AddComponent<LineRenderer>();
-        lr.positionCount = 4; // 画一个四点的矩形条表示卷边
-        lr.material = cutEdgeMaterial != null ? cutEdgeMaterial : new Material(Shader.Find("Sprites/Default"));
-        lr.widthCurve = AnimationCurve.Constant(0, 1, 0.05f);
-        lr.numCapVertices = 4;
-        lr.useWorldSpace = true;
-
-        CutSegment newSeg = new CutSegment
-        {
-            startIndex = startIndex,
-            timeElapsed = 0f,
-            lineRenderer = lr
-        };
-
-        cutSegments.Add(newSeg);
    }

-    // 每帧更新所有切割段动画
-    private void UpdateCutSegments()
+    private void AddCutPoint(Vector3 point)
    {
-        for (int i = cutSegments.Count - 1; i >= 0; i--)
+        if (cutLinePoints.Count == 0 || Vector3.Distance(cutLinePoints[cutLinePoints.Count - 1], point) > 0.01f)
        {
-            var seg = cutSegments[i];
-            seg.timeElapsed += Time.deltaTime;
-
-            float expandT = Mathf.Clamp01(seg.timeElapsed / cutEdgeExpandDuration);
-            float coolT = Mathf.Clamp01((seg.timeElapsed - cutEdgeExpandDuration) / cutEdgeCoolDuration);
-
-            // 获取该段两个端点
-            int nextIndex = WrapIndex(seg.startIndex + 1);
-            Vector2 p1 = edgePoints[seg.startIndex];
-            Vector2 p2 = edgePoints[nextIndex];
-
-            Vector2 segmentDir = (p2 - p1).normalized;
-            Vector2 normal = new Vector2(-segmentDir.y, segmentDir.x);
-
-            float offset = cutEdgeMaxOffset * expandT;
-
-            // 四个点形成的卷边矩形
-            Vector3[] positions = new Vector3[4];
-            // 主边
-            positions[0] = p1;
-            positions[1] = p2;
-            // 卷边偏移边（沿法线方向偏移offset）
-            positions[2] = p2 + normal * offset;
-            positions[3] = p1 + normal * offset;
-
-            seg.lineRenderer.positionCount = 4;
-            seg.lineRenderer.SetPositions(positions);
-
-            // 颜色渐变
-            Color color = cutEdgeColorGradient.Evaluate(1f - coolT);
-            seg.lineRenderer.startColor = color;
-            seg.lineRenderer.endColor = color;
-
-            // 冷却结束删除该段
-            if (seg.timeElapsed > cutEdgeExpandDuration + cutEdgeCoolDuration)
+            cutLinePoints.Add(point);
+            if (cutLineRenderer != null)
            {
-                Destroy(seg.lineRenderer.gameObject);
-                cutSegments.RemoveAt(i);
+                cutLineRenderer.positionCount = cutLinePoints.Count;
+                cutLineRenderer.SetPositions(cutLinePoints.ToArray());
            }
        }
    }

+    private void EndCutting()
+    {
+        isCutting = false;
+        // 这里可以添加切割结束后的淡出效果等
+    }
+
    private int FindNearestEdgePointIndex(Vector2 pos, out float minDist)
    {
        int nearestIndex = 0;