Created
November 6, 2023 22:00
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using System.Collections; | |
using System.Collections.Generic; | |
using UnityEngine; | |
[RequireComponent(typeof(MeshFilter))] | |
public class PointTracker : MonoBehaviour | |
{ | |
private MeshFilter meshFilter; | |
private Transform[] markers; | |
void Start() | |
{ | |
meshFilter = gameObject.GetComponent<MeshFilter>(); | |
markers = new Transform[meshFilter.mesh.vertexCount]; | |
Debug.Log(string.Format( | |
"Tracking {0} vertices in \"{1}\"", | |
meshFilter.mesh.vertexCount, | |
transform.name)); | |
for (int i = 0; i < meshFilter.mesh.vertexCount; i++) | |
{ | |
markers[i] = ObjectPool.Instance.GetObject().transform; | |
markers[i].name = string.Format("{0} marker{1}", transform.name, i); | |
} | |
} | |
void Update() | |
{ | |
// make a locally scoped copy of mesh vertices -- if we directly access | |
// vertices using meshFilter.mesh.vertices[i] inside of the for() loop | |
// we create a tremendous amount of GC cleanup (~113MB...) | |
Vector3[] vertices = meshFilter.mesh.vertices; | |
for (int i = 0; i < meshFilter.mesh.vertexCount; i++) | |
markers[i].position = TransformVertex(vertices[i], transform); | |
} | |
private Vector3 TransformVertex(Vector3 vertex, Transform parent) | |
{ | |
return parent.localToWorldMatrix.MultiplyPoint3x4(vertex); | |
} | |
} |
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