using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            this.Load += new EventHandler(Form1_Load);
        }
        const int cw = 400;
        const int ch = 400;
        Bitmap[] bmp = new Bitmap[2];
        int screen = 0;
        PictureBox pictureBox1 = new PictureBox();
        Timer timer1 = new Timer();

        GraphicsPath gp = new GraphicsPath();
        private void Form1_Load(object sender, EventArgs e)
        {
            this.ClientSize = new Size(cw, ch);
            this.Controls.Add(pictureBox1);
            pictureBox1.Dock = DockStyle.Fill;

            
            bmp[0] = new Bitmap(cw, ch, PixelFormat.Format32bppArgb);
            bmp[1] = new Bitmap(cw, ch, PixelFormat.Format32bppArgb);

            PointF[] tp = new PointF[]
            {
                new PointF(0.0f,10.0f),
                new PointF(10.0f,0.0f),
                new PointF(0.0f,-10.0f),
            };
            gp.AddLine(0.0f, 0.0f, 20.0f, 0.0f);
            gp.AddPolygon(tp);

            timer1.Interval = 1000 / 60;
            timer1.Tick += new EventHandler(timer1_Tick);
            timer1.Enabled = true;
        }
        const float vec = 5.0f;
        float vx;
        float vy;
        int phase = 0;
        Random rand = new Random();
        double baseangle;
        double angle = 0.0;
        int count = 0;
        PointF p = new PointF(200.0f, 200.0f);
        private void timer1_Tick(object sender, EventArgs e)
        {
            switch (phase)
            {
                //思考フェーズ
                case 0:
                    baseangle = rand.Next(0, 90)-45;
                    phase = 1;
                    break;
                //回転フェーズ
                case 1:
                    if (baseangle != 0)
                    {
                        if (baseangle > 0)
                        {
                            angle++;
                            baseangle--;
                        }
                        else
                        {
                            angle--;
                            baseangle++;
                        }
                    }
                    else
                    {
                        double subangle = angle / (180 / Math.PI);
                        vx = vec * (float)Math.Cos(subangle);
                        vy = vec * (float)Math.Sin(subangle);
                        phase = 2;
                    }
                    break;
                //移動フェーズ
                case 2:
                    if (count < 20)
                    {
                        p.X += vx;
                        p.Y += vy;
                        count++;
                        if (p.X < 20 || p.X >= cw-20 || p.Y < 20 || p.Y >= ch-20)
                        {
                            count = 0;
                            baseangle = 180;
                            phase = 1;
                        }
                    }
                    else
                    {
                        count = 0;
                        phase = 0;
                    }
                    break;
                default:
                    break;
            }
            this.Text = phase.ToString();
            //double angle = 45.0;// / (180.0 / Math.PI);
            using (Graphics g = Graphics.FromImage(bmp[screen]))
            {
                g.SmoothingMode = SmoothingMode.AntiAlias;
                g.FillRectangle(Brushes.White, 0, 0, cw, ch);

                Matrix m = new Matrix();
                m.Translate(p.X, p.Y);
                m.Rotate((float)angle);
                g.Transform = m;
                g.DrawPath(Pens.Blue, gp);
            }
            pictureBox1.Image = bmp[screen];
            screen ^= 1;
        }
    }
}