using System.Numerics;

namespace LandblockExtraction.LandBlockExtractor {
    public class VerticesStruct {
        public Vector3[] position { get; set; }
        public Vector3[] normal { get; set; }
        public Vector4[] color { get; set; }
        public Vector4[] farcolor { get; set; }
        public Vector2[] texturecoord { get; set; }
        public Vector4[] terraintype { get; set; }

        public VerticesStruct(int blockSize) {
            position = new Vector3[blockSize * blockSize];
            normal = new Vector3[blockSize * blockSize];
            color = new Vector4[blockSize * blockSize];
            farcolor = new Vector4[blockSize * blockSize];
            texturecoord = new Vector2[blockSize * blockSize];
            terraintype = new Vector4[blockSize * blockSize];
        }

        public float[] Vertices() {
            int length = position.Length;
            float[] vertices = new float[length * 20];
            for (int i = 0, vi = 0; i < length; i++, vi += 20) {
                vertices[vi] = position[i].X;
                vertices[vi + 1] = position[i].Y;
                vertices[vi + 2] = position[i].Z;
                vertices[vi + 3] = normal[i].X;
                vertices[vi + 4] = normal[i].Y;
                vertices[vi + 5] = normal[i].Z;
                vertices[vi + 6] = color[i].X;
                vertices[vi + 7] = color[i].Y;
                vertices[vi + 8] = color[i].Z;
                vertices[vi + 9] = color[i].W;
                vertices[vi + 10] = farcolor[i].X;
                vertices[vi + 11] = farcolor[i].Y;
                vertices[vi + 12] = farcolor[i].Z;
                vertices[vi + 13] = farcolor[i].W;
                vertices[vi + 14] = texturecoord[i].X;
                vertices[vi + 15] = texturecoord[i].Y;
                vertices[vi + 16] = terraintype[i].X;
                vertices[vi + 17] = terraintype[i].Y;
                vertices[vi + 18] = terraintype[i].Z;
                vertices[vi + 19] = terraintype[i].W;
            }
            return vertices;
        }
    }
}