Touhou/client/Assets/Game/Scripts/Util/Shape/UtilShapeObject.cs

using System;
using UnityEngine;
using UnityEngine.Serialization;

namespace Game
{
    public enum EShapeType
    {
        Dot,
        Circle,
        Sector,
        Box,
    }

    public class Shape
    {
        public EShapeType Type;
        public Vector3 Offset;
        public float Height;
        public float SizeX;
        public float SizeY;
        public float Radius;
        public float Angle;

        public static Shape NewDot(Vector3 offset)
        {
            var shape = new Shape
            {
                Type = EShapeType.Dot,
                Offset = offset,
            };
            return shape;
        }

        public static Shape NewCircle(Vector3 offset, float height, float radius)
        {
            var shape = new Shape
            {
                Type = EShapeType.Circle,
                Offset = offset,
                Height = height,
                Radius = radius
            };
            return shape;
        }

        public static Shape NewSector(Vector3 offset, float height, float radius, float angle)
        {
            var shape = new Shape
            {
                Type = EShapeType.Sector,
                Offset = offset,
                Height = height,
                Radius = radius,
                Angle = angle
            };
            return shape;
        }

        public static Shape NewBox(Vector3 offset, float height, float sizeX, float sizeY)
        {
            Util.Print("offset", offset);
            var shape = new Shape
            {
                Type = EShapeType.Box,
                Offset = offset,
                Height = height,
                SizeX = sizeX,
                SizeY = sizeY
            };
            return shape;
        }

        public Vector4 GetAABB(Vector3 direction)
        {
            var aabb = Vector4.zero;
            switch (Type)
            {
                case EShapeType.Circle:
                case EShapeType.Sector:
                    aabb = new Vector4(-Radius, Radius, -Radius, Radius);
                    break;
                case EShapeType.Box:
                    ForeachVertices(direction, (vertex) =>
                    {
                        if (vertex.x < aabb.x) aabb.x = vertex.x;
                        if (vertex.x > aabb.y) aabb.y = vertex.x;
                        if (vertex.z < aabb.z) aabb.z = vertex.z;
                        if (vertex.z > aabb.w) aabb.w = vertex.z;
                    });
                    break;
            }

            return aabb;
        }

        public void ForeachVertices(Vector3 direction, Action<Vector3> action)
        {
            var (halfX, halfY) = (SizeX / 2, SizeY / 2);

            var up = new Vector3(direction.z, 0, direction.x);
            var right = new Vector3(direction.x, 0, -direction.z);

            var topLeft = right * halfX - up * halfY;
            var topRight = right * halfX + up * halfY;
            var bottomLeft = -right * halfX - up * halfY;
            var bottomRight = -right * halfX + up * halfY;

            action(topLeft);
            action(topRight);
            action(bottomLeft);
            action(bottomRight);
        }

        public void ForeachVerticesPair(Vector3 direction, Action<Vector3, Vector3> action)
        {
            var (halfX, halfY) = (SizeX / 2, SizeY / 2);

            var up = new Vector3(direction.z, 0, direction.x);
            var right = new Vector3(direction.x, 0, -direction.z);

            var topLeft = right * halfX - up * halfY;
            var topRight = right * halfX + up * halfY;
            var bottomLeft = -right * halfX - up * halfY;
            var bottomRight = -right * halfX + up * halfY;

            action(topLeft, topRight);
            action(topRight, bottomRight);
            action(bottomRight, bottomLeft);
            action(bottomLeft, topLeft);
        }
    }
}