点击在plane上消除该mesh

资源大湿 发表于 2018-8-1 10:29

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
/// <summary>
/// Cutting hole in AM esh. made by u3dchina.com
/// </summary>
public class CuttingHoleInAMesh : MonoBehaviour
{

// Use this for initialization
void Start()
{

}

// Update is called once per frame
void Update()
{
   if (Input.GetMouseButtonDown(0))
   {
         RaycastHit hit;
         Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
         if (Physics.Raycast(ray, out hit, 1000f))
         {
            deleteSquare(hit);
            Debug.Log("triangleIndex:" + hit.triangleIndex);
         }
   }
}
/// <summary>
/// Finds the vertex.
/// </summary>
/// <returns>The vertex.</returns>
/// <param name="v">V.</param>
int findVertexIdx(Vector3 v)
{
   Vector3[] vertices = transform.GetComponent<MeshFilter>().mesh.vertices;
   for (int i = 0; i < vertices.Length; i++)
   {
         if (vertices == v)
         {
            return i;
         }
   }
   return -1;
}
/// <summary>
/// Deletes the square.
/// </summary>
/// <param name="index1">Index1.delete triangle idx1</param>
/// <param name="index2">Index2.delete triangle idx2</param>
void deleteSquare(int index1, int index2)
{
   Destroy(this.gameObject.GetComponent<MeshCollider>());
   Mesh mesh = transform.GetComponent<MeshFilter>().mesh;
   int[] oldTriangles = mesh.triangles;
   int[] newTriangles = new int;
   int i = 0;
   int j = 0;
   while (j < mesh.triangles.Length)
   {
         if (j != index1 * 3 && j != index2 * 3)
         {
            newTriangles = oldTriangles;
            newTriangles = oldTriangles;
            newTriangles = oldTriangles;
         }
         else
         {
            j += 3;
         }
   }
   transform.GetComponent<MeshFilter>().mesh.triangles = newTriangles;
   Debug.Log("newTriangles len:" + newTriangles.Length);
   this.gameObject.AddComponent<MeshCollider>();

}
/// <summary>
/// Finds the triangle.
/// </summary>
/// <returns>The triangle.</returns>
/// <param name="v1">V1.</param>
/// <param name="v2">V2.</param>
/// <param name="notTriIndex">Not tri index.</param>
int findTriangle(Vector3 v1, Vector3 v2, int notTriIndex)
{
   int[] triangles = transform.GetComponent<MeshFilter>().mesh.triangles;
   Vector3[] vertices = transform.GetComponent<MeshFilter>().mesh.vertices;
   int j = 0;
   while (j < triangles.Length)
   {
         if (j / 3 != notTriIndex)
         {
            if (vertices] == v1 && (vertices] == v2 || vertices] == v2))
            {
               return j / 3;
            }
            else if (vertices] == v2 && (vertices] == v1 || vertices] == v1))
            {
               return j / 3;
            }
            else if (vertices] == v2 && (vertices] == v1 || vertices] == v1))
            {
               return j / 3;
            }
            else if (vertices] == v1 && (vertices] == v2 || vertices] == v2))
            {
               return j / 3;
            }
         }
         j += 3;
   }
   return -1;
}
/// <summary>
/// Deletes the square.
/// </summary>
/// <param name="hit">Hit.</param>
void deleteSquare(RaycastHit hit)
{
   int hitTriIdx = hit.triangleIndex;
   Destroy(this.gameObject.GetComponent<MeshCollider>());
   Mesh mesh = transform.GetComponent<MeshFilter>().mesh;
   Vector3[] vertices = mesh.vertices;

   int[] oldTriangles = mesh.triangles;
   int i = 0;
   while (i < oldTriangles.Length)
   {
         Debug.Log("oldTriangles i:" + oldTriangles);
         i++;
   }
   i = 0;
   while (i < vertices.Length)
   {
         Debug.Log("vertices i:" + vertices);
         i++;
   }
   Vector3 p0 = vertices];
   Vector3 p1 = vertices];
   Vector3 p2 = vertices];

   float edge1 = Vector3.Distance(p0, p1);
   float edge2 = Vector3.Distance(p0, p2);
   float edge3 = Vector3.Distance(p1, p2);

   //find adjacent edge of triangle
   Vector3 shared1;
   Vector3 shared2;
   if (edge1 > edge2 && edge1 > edge3)
   {
         shared1 = p0;
         shared2 = p1;
   }
   else if (edge2 > edge1 && edge2 > edge3)
   {
         shared1 = p0;
         shared2 = p2;
   }
   else
   {
         shared1 = p1;
         shared2 = p2;
   }
   int v1 = findVertexIdx(shared1);
   int v2 = findVertexIdx(shared2);
   deleteSquare(hitTriIdx, findTriangle(vertices, vertices, hitTriIdx));
}
/// <summary>
/// Deletes the tri.
/// </summary>
/// <param name="hit">Hit.</param>
void deleteTri(RaycastHit hit)
{
   int index = hit.triangleIndex;
   Destroy(this.gameObject.GetComponent<MeshCollider>());
   Mesh mesh = transform.GetComponent<MeshFilter>().mesh;
   Vector3[] vertices = mesh.vertices;

   int[] oldTriangles = mesh.triangles;

   Vector3 p0 = vertices];
   Vector3 p1 = vertices];
   Vector3 p2 = vertices];

   float edge1 = Vector3.Distance(p0, p1);
   float edge2 = Vector3.Distance(p0, p2);
   float edge3 = Vector3.Distance(p1, p2);

   Debug.Log("vertices1:" + p0);
   Debug.Log("vertices2:" + p1);
   Debug.Log("vertices3:" + p2);

   Debug.Log("edge1:" + edge1);
   Debug.Log("edge2:" + edge2);
   Debug.Log("edge3:" + edge3);

   int[] newTriangles = new int;
   int i = 0, j = 0;
   while (j < mesh.triangles.Length)
   {
         if (j != index * 3)
         {
            newTriangles = oldTriangles;
            newTriangles = oldTriangles;
            newTriangles = oldTriangles;
         }
         else
         {
            j += 3;
         }
   }
   transform.GetComponent<MeshFilter>().mesh.triangles = newTriangles;
   this.gameObject.AddComponent<MeshCollider>();
}

}

宗智发表于 2018-8-21 16:51

你真的叼，逆天就是指的你

pengtaida 发表于 2018-9-17 11:12

很不错

Geshi 发表于 2018-9-17 11:23

楼主是超人

lrz0913 发表于 2018-9-17 10:57

好帖就是要顶

Atree 发表于 2018-9-17 10:52

顶顶多好

drrfly 发表于 2018-9-17 11:15

LZ真是人才

lvcoc 发表于 2019-1-9 13:48

不错不错不错

250020695 发表于 2020-5-19 07:03

楼主是超人

362514sc 发表于 2020-5-19 07:10

难得一见的好帖

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点击在plane上消除该mesh