using AC2RE.Definitions;
using System.Numerics;

namespace LandblockExtraction.Tools {
    public static class MathOperations {
        public static uint GetXLandblock(uint landblock) {
            return (landblock & 0xFF000000) >> 24;
        }
        public static uint GetYLandblock(uint landblock) {
            return (landblock & 0x00FF0000) >> 16;
        }
        public static uint GetTerrainInCellInfo(uint cellInfo) {
            return (cellInfo >> 0) & (0x7f);
        }
        public static uint GetRoadInCellInfo(uint cellInfo) {
            return (cellInfo >> 24) & (0xff);
        }
        public static uint GetColorInCellInfo(uint cellInfo) {
            return (cellInfo >> 16) & (0xff);
        }
        public static uint GetSceneInCellInfo(uint cellInfo) {
            return (cellInfo >> 7) & (0x1f);
        }
        public static Vector4 RGBAColorToVector4(RGBAColor color) {
            return new Vector4(color.r, color.g, color.b, color.a);
        }
        // Calcule la normale d'un triangle à partir de trois points
        public static Vector3 CalculateTriangleNormal(Vector3 A, Vector3 B, Vector3 C) {
            Vector3 AB = B - A;
            Vector3 AC = C - A;
            Vector3 normal = Vector3.Cross(AB, AC);
            normal = Vector3.Normalize(normal);
            return normal;
        }

        // Calcule la normale moyenne d'un quadrilatère en utilisant deux de ses triangles
        public static Vector3 CalculateQuadNormal(Vector3 A, Vector3 B, Vector3 C, Vector3 D) {
            Vector3 normal1 = CalculateTriangleNormal(A, B, C);
            Vector3 normal2 = CalculateTriangleNormal(C, B, D);

            Vector3 averageNormal = (normal1 + normal2) / 2;
            return Vector3.Normalize(averageNormal);
        }
    }
}