示例#1
0
        private static bool IsTriangleHidden(Vector3 v0, Vector3 v1, Vector3 v2, float maxDistance, List <Vector3> triMinCorners, List <Vector3> triMaxCorners, List <Vector3> hidingVs, List <int> hidingTs)
        {
            Vector3    normal = MeshExtensions.GetNormal(v0, v1, v2);
            List <int> trianglesWithinRange = MeshExtensions.GetTrianglesWithinRange(v0, v1, v2, maxDistance, triMinCorners, triMaxCorners);

            return(MeshExtensions.IsHidden((v0 + v1 + v2) / 3f, normal, maxDistance, hidingVs, hidingTs, trianglesWithinRange) && MeshExtensions.IsHidden(v0, normal, maxDistance, hidingVs, hidingTs, trianglesWithinRange) && MeshExtensions.IsHidden(v1, normal, maxDistance, hidingVs, hidingTs, trianglesWithinRange) && MeshExtensions.IsHidden(v2, normal, maxDistance, hidingVs, hidingTs, trianglesWithinRange));
        }
示例#2
0
 private static bool IsHidden(Vector3 v, Vector3 n, float maxDistance, List <Vector3> hidingVs, List <int> hidingTs, List <int> trianglesToCheck)
 {
     for (int i = 0; i < trianglesToCheck.Count; i++)
     {
         int     num     = trianglesToCheck[i] * 3;
         Vector3 vector  = hidingVs[hidingTs[num]];
         Vector3 vector2 = hidingVs[hidingTs[num + 1]];
         Vector3 vector3 = hidingVs[hidingTs[num + 2]];
         Vector3 normal  = MeshExtensions.GetNormal(vector, vector2, vector3);
         float   num2    = Vector3.Angle(n, normal);
         if (num2 < 60f)
         {
             float num3 = MeshExtensions.DistanceToPlane(v, n, vector, normal);
             if (num3 > 0f && num3 <= maxDistance)
             {
                 Vector3 p  = v + n * num3;
                 Vector2 v2 = p.Barycentric(vector, vector2, vector3);
                 if (v2.IsBarycentricInTriangle())
                 {
                     return(true);
                 }
             }
         }
     }
     return(false);
 }
示例#3
0
        public static Mesh CopyAndRemoveHiddenTriangles(this Mesh orig, int subMeshIdx, Matrix4x4 localToWorldMatrix, Mesh[] hidingMeshes, int[] hidingSubMeshes, Matrix4x4[] hidingLocalToWorldMatrices, float maxRemoveDistance = 0.01f)
        {
            if (subMeshIdx >= orig.subMeshCount)
            {
                return(null);
            }
            if (hidingMeshes.Length <= 0)
            {
                return(null);
            }
            if (hidingMeshes.Length != hidingSubMeshes.Length || hidingMeshes.Length != hidingLocalToWorldMatrices.Length)
            {
                return(null);
            }
            Mesh mesh = UnityEngine.Object.Instantiate <Mesh>(orig);
            List <List <int> > list  = new List <List <int> >(mesh.subMeshCount);
            List <Vector3>     list2 = new List <Vector3>(orig.vertices);
            List <Vector3>     list3 = new List <Vector3>(orig.vertexCount);
            List <Vector2>     list4 = new List <Vector2>(orig.vertexCount);
            List <Vector2>     list5 = new List <Vector2>();
            List <Vector2>     list6 = new List <Vector2>();
            List <Vector2>     list7 = new List <Vector2>();
            List <Color32>     list8 = new List <Color32>();
            List <BoneWeight>  list9 = new List <BoneWeight>();

            list3.AddRange(orig.normals);
            if (list3 == null || list3.Count <= 0)
            {
                orig.RecalculateNormals();
                list3.AddRange(orig.normals);
            }
            list4.AddRange(orig.uv);
            list5.AddRange(orig.uv2);
            list6.AddRange(orig.uv3);
            list7.AddRange(orig.uv4);
            list8.AddRange(orig.colors32);
            list9.AddRange(orig.boneWeights);
            for (int i = 0; i < orig.subMeshCount; i++)
            {
                List <int> list10 = new List <int>();
                list10.AddRange(orig.GetTriangles(i));
                list.Add(list10);
            }
            List <int>     list11 = list[subMeshIdx];
            List <Vector3> list12 = new List <Vector3>();
            List <int>     list13 = new List <int>();
            Mesh           x      = null;
            int            num    = 0;
            int            num2   = 0;

            for (int j = 0; j < hidingMeshes.Length; j++)
            {
                Mesh  mesh2     = hidingMeshes[j];
                int[] triangles = mesh2.GetTriangles(hidingSubMeshes[j]);
                if (x != mesh2)
                {
                    num += num2;
                }
                for (int k = 0; k < triangles.Length; k++)
                {
                    list13.Add(triangles[k] + num);
                }
                if (x != mesh2)
                {
                    Matrix4x4 matrix4x = hidingLocalToWorldMatrices[j];
                    Vector3[] vertices = mesh2.vertices;
                    for (int l = 0; l < vertices.Length; l++)
                    {
                        list12.Add(matrix4x.MultiplyPoint3x4(vertices[l]));
                    }
                    num2 = vertices.Length;
                    x    = mesh2;
                }
            }
            List <Vector3> list14 = new List <Vector3>();
            List <Vector3> list15 = new List <Vector3>();

            for (int m = 0; m < list13.Count; m += 3)
            {
                Vector3 vector  = list12[list13[m]];
                Vector3 vector2 = list12[list13[m + 1]];
                Vector3 vector3 = list12[list13[m + 2]];
                list14.Add(new Vector3(Mathf.Min(Mathf.Min(vector.x, vector2.x), vector3.x), Mathf.Min(Mathf.Min(vector.y, vector2.y), vector3.y), Mathf.Min(Mathf.Min(vector.z, vector2.z), vector3.z)));
                list15.Add(new Vector3(Mathf.Max(Mathf.Max(vector.x, vector2.x), vector3.x), Mathf.Max(Mathf.Max(vector.y, vector2.y), vector3.y), Mathf.Max(Mathf.Max(vector.z, vector2.z), vector3.z)));
            }
            List <int> list16 = new List <int>();

            for (int n = 0; n < list11.Count; n += 3)
            {
                Vector3 v  = localToWorldMatrix.MultiplyPoint3x4(list2[list11[n]]);
                Vector3 v2 = localToWorldMatrix.MultiplyPoint3x4(list2[list11[n + 1]]);
                Vector3 v3 = localToWorldMatrix.MultiplyPoint3x4(list2[list11[n + 2]]);
                if (!MeshExtensions.IsTriangleHidden(v, v2, v3, maxRemoveDistance, list14, list15, list12, list13))
                {
                    list16.Add(list11[n]);
                    list16.Add(list11[n + 1]);
                    list16.Add(list11[n + 2]);
                }
            }
            list[subMeshIdx] = list16;
            LODMaker.RemoveUnusedVertices(list2, list3, list4, list5, list6, list7, list8, list9, list);
            mesh.uv4         = null;
            mesh.uv3         = null;
            mesh.uv2         = null;
            mesh.uv2         = null;
            mesh.boneWeights = null;
            mesh.colors32    = null;
            mesh.normals     = null;
            mesh.tangents    = null;
            mesh.triangles   = null;
            mesh.vertices    = list2.ToArray();
            if (list3.Count > 0)
            {
                mesh.normals = list3.ToArray();
            }
            if (list4.Count > 0)
            {
                mesh.uv = list4.ToArray();
            }
            if (list5.Count > 0)
            {
                mesh.uv2 = list5.ToArray();
            }
            if (list6.Count > 0)
            {
                mesh.uv3 = list6.ToArray();
            }
            if (list7.Count > 0)
            {
                mesh.uv4 = list7.ToArray();
            }
            if (list8.Count > 0)
            {
                mesh.colors32 = list8.ToArray();
            }
            if (list9.Count > 0)
            {
                mesh.boneWeights = list9.ToArray();
            }
            mesh.subMeshCount = list.Count;
            for (int num3 = 0; num3 < list.Count; num3++)
            {
                if (num3 == subMeshIdx)
                {
                    mesh.SetTriangles(list16.ToArray(), num3);
                }
                else
                {
                    mesh.SetTriangles(list[num3].ToArray(), num3);
                }
            }
            if (list3 == null || list3.Count <= 0)
            {
                mesh.RecalculateNormals();
            }
            mesh.RecalculateTangents();
            mesh.RecalculateBounds();
            return(mesh);
        }