HelixToolkit.Wpf.MeshBuilder.NoSharedVertices C# (CSharp) Method

        private void NoSharedVertices()
        {
            var p = new Point3DCollection();
            var ti = new Int32Collection();
            Vector3DCollection n = null;
            if (this.normals != null)
            {
                n = new Vector3DCollection();
            }

            PointCollection tc = null;
            if (this.textureCoordinates != null)
            {
                tc = new PointCollection();
            }

            for (int i = 0; i < this.triangleIndices.Count; i += 3)
            {
                int i0 = i;
                int i1 = i + 1;
                int i2 = i + 2;
                int index0 = this.triangleIndices[i0];
                int index1 = this.triangleIndices[i1];
                int index2 = this.triangleIndices[i2];
                var p0 = this.positions[index0];
                var p1 = this.positions[index1];
                var p2 = this.positions[index2];
                p.Add(p0);
                p.Add(p1);
                p.Add(p2);
                ti.Add(i0);
                ti.Add(i1);
                ti.Add(i2);
                if (n != null)
                {
                    n.Add(this.normals[index0]);
                    n.Add(this.normals[index1]);
                    n.Add(this.normals[index2]);
                }

                if (tc != null)
                {
                    tc.Add(this.textureCoordinates[index0]);
                    tc.Add(this.textureCoordinates[index1]);
                    tc.Add(this.textureCoordinates[index2]);
                }
            }

            this.positions = p;
            this.triangleIndices = ti;
            this.normals = n;
            this.textureCoordinates = tc;
        }