MyGame.Terrain.genNormals C# (CSharp) Method

        private void genNormals()
        {
            // For each triangle
            for (int i = 0; i < nIndices; i += 3)
            {
                // Find the position of each corner of the triangle
                Vector3 v1 = vertices[indices[i]].Position;
                Vector3 v2 = vertices[indices[i + 1]].Position;
                Vector3 v3 = vertices[indices[i + 2]].Position;

                // Cross the vectors between the corners to get the normal
                Vector3 normal = Vector3.Cross(v1 - v2, v1 - v3);
                normal.Normalize();

                // Add the influence of the normal to each vertex in the triangle
                vertices[indices[i]].Normal += normal;
                vertices[indices[i + 1]].Normal += normal;
                vertices[indices[i + 2]].Normal += normal;
            }

            // Average the influences of the triangles touching each vertex
            for (int i = 0; i < nVertices; i++)
                vertices[i].Normal.Normalize();
        }