修改mesh

2025-11-04 23:11:56 +08:00
parent 32f07eb14e
commit e8f6308580
93 changed files with 1587 additions and 491 deletions
--- a/Assets/Scripts/ThirdParty/Rope/Examples/00_Main/RopeBridgePlank.cs
+++ b/Assets/Scripts/ThirdParty/Rope/Examples/00_Main/RopeBridgePlank.cs
@@ -0,0 +1,123 @@
+using UnityEngine;
+using Unity.Mathematics;
+
+namespace NBF.Example
+{
+    [RequireComponent(typeof(Rigidbody))]
+    public class RopeBridgePlank : MonoBehaviour
+    {
+        public Rope ropeLeft;
+        public Rope ropeRight;
+        public float extentLeft = -0.5f;
+        public float extentRight = 0.5f;
+        public float extentPivot = 0.5f;
+
+        [Tooltip("A measure of the longitudal stiffness of the plank. That is, how quickly should the particles on the opposite ropes move to the correct distance between them.")]
+        [Range(0.0f, 1.0f)] public float longitudalStiffness = 0.25f;
+
+        public float restingRigidbodyMassMultiplier = 5.0f;
+
+        protected Rigidbody rb;
+        protected int particleLeft;
+        protected int particleRight;
+        protected int particlePivotLeft;
+        protected int particlePivotRight;
+        protected float distance;
+        protected float frameTotalMass;
+
+        public void Start()
+        {
+            rb = GetComponent<Rigidbody>();
+            if (rb != null)
+            {
+                rb.isKinematic = true;
+            }
+
+            var pointOnBodyLeft = transform.TransformPoint(Vector3.right * extentLeft);
+            var pointOnBodyRight = transform.TransformPoint(Vector3.right * extentRight);
+            var pointOnBodyPivot = transform.TransformPoint(Vector3.forward * extentPivot);
+
+            if (ropeLeft != null)
+            {
+                ropeLeft.GetClosestParticle(pointOnBodyLeft, out particleLeft, out float distance);
+                ropeLeft.GetClosestParticle(pointOnBodyPivot, out particlePivotLeft, out distance);
+            }
+            if (ropeRight != null)
+            {
+                ropeRight.GetClosestParticle(pointOnBodyRight, out particleRight, out float distance);
+                ropeRight.GetClosestParticle(pointOnBodyPivot, out particlePivotRight, out distance);
+            }
+
+            if (ropeLeft != null && ropeRight != null)
+            {
+                distance = math.distance(ropeLeft.GetPositionAt(particleLeft), ropeRight.GetPositionAt(particleRight));
+            }
+        }
+
+        public void FixedUpdate()
+        {
+            if (rb == null)
+            {
+                return;
+            }
+            if (ropeLeft == null || ropeRight == null)
+            {
+                rb.isKinematic = false;
+                return;
+            }
+
+            var left = ropeLeft.GetPositionAt(particleLeft);
+            var right = ropeRight.GetPositionAt(particleRight);
+            var pivot = (ropeLeft.GetPositionAt(particlePivotLeft) + ropeRight.GetPositionAt(particlePivotRight)) * 0.5f;
+
+            left.KeepAtDistance(ref right, distance, longitudalStiffness);
+
+            var middle = (left + right) * 0.5f;
+
+            rb.MoveRotation(Quaternion.LookRotation(pivot - middle, Vector3.Cross(pivot - middle, right - left)));
+            rb.MovePosition((Vector3)middle - transform.TransformVector(Vector3.right * (extentLeft + extentRight) * 0.5f));
+
+            ropeLeft.SetPositionAt(particleLeft, left);
+            ropeRight.SetPositionAt(particleRight, right);
+
+            var massMultiplier = 1.0f + frameTotalMass * restingRigidbodyMassMultiplier;
+            frameTotalMass = 0.0f;
+
+            if (ropeLeft.GetMassMultiplierAt(particleLeft) > 0.0f)
+            {
+                ropeLeft.SetMassMultiplierAt(particleLeft, massMultiplier);
+            }
+            if (ropeRight.GetMassMultiplierAt(particleRight) > 0.0f)
+            {
+                ropeRight.SetMassMultiplierAt(particleRight, massMultiplier);
+            }
+        }
+
+        public void OnCollisionStay(Collision collision)
+        {
+            if (collision.rigidbody != null)
+            {
+                frameTotalMass += collision.rigidbody.mass;
+            }
+        }
+
+#if UNITY_EDITOR
+        public void OnDrawGizmosSelected()
+        {
+            var pointOnBodyLeft = transform.TransformPoint(Vector3.right * extentLeft);
+            var pointOnBodyRight = transform.TransformPoint(Vector3.right * extentRight);
+            var pointOnBodyPivot = transform.TransformPoint(Vector3.forward * extentPivot);
+
+            Gizmos.color = Color.red;
+            Gizmos.DrawWireSphere(pointOnBodyLeft, 0.05f);
+            Gizmos.DrawWireSphere(pointOnBodyRight, 0.05f);
+            Gizmos.DrawLine(pointOnBodyLeft, pointOnBodyRight);
+
+            Gizmos.color = Color.blue;
+            Gizmos.DrawWireSphere(pointOnBodyPivot, 0.05f);
+            Gizmos.DrawLine(pointOnBodyLeft, pointOnBodyPivot);
+            Gizmos.DrawLine(pointOnBodyRight, pointOnBodyPivot);
+        }
+#endif
+    }
+}