Player.cs :  » Game » SDL » SdlDotNetExamples » SmallDemos » C# / CSharp Open Source

#region LICENSE
/* This file is part of BombRun
 * (c) 2003 Sijmen Mulder
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#endregion LICENSE

using System;
using System.Drawing;

using SdlDotNet.Graphics;
using SdlDotNet.Core;
using SdlDotNet.Graphics.Sprites;
using SdlDotNet.Input;

namespace SdlDotNetExamples.SmallDemos{
    /// <summary>
    /// 
    /// </summary>
    public class Player : Sprite
    {
        bool left;
        bool right;
        bool jump;
        bool fire;

        // the tick of the last fire action
        int lastfire;

        int jumpstart;
        bool falling;

        /// <summary>
        /// 
        /// </summary>
        /// <param name="location"></param>
        /// <param name="playerSurface"></param>
        public Player(Surface playerSurface, Point location)
            :
            base(playerSurface, location)
        {
            jumpstart = location.Y;
            base.Surface.TransparentColor = Color.White;
            base.Surface.Transparent = true;
            //base.Size = base.Surface.Size;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="args"></param>
        public override void Update(TickEventArgs args)
        {
            if (args == null)
            {
                throw new ArgumentNullException("args");
            }
            float change = 5f;
            float jumpspeed = 10f;

            if (jump || falling)
            {
                change = change / 2;
            }

            if (left)
            {
                this.X -= (int)change;
            }
            if (right)
            {
                this.X += (int)change;
            }

            if (jump)
            {
                if (this.Y < jumpstart - Video.Screen.Height / 3)
                {
                    jump = false;
                    falling = true;
                }
                else
                {
                    this.Y -= (int)(jumpspeed * 1.5f);
                }
            }
            else if (falling)
            {
                this.Y += (int)jumpspeed;

                if (this.Y > jumpstart)
                {
                    this.Y = jumpstart;
                    falling = false;
                }
            }

            if (this.X < 0)
            {
                this.X = 0;
            }

            if (this.X + this.Surface.Size.Width > Video.Screen.Width)
            {
                this.X = Video.Screen.Width - this.Surface.Width;
            }

            // fire if needed. the 250 stands for the delay between two shots
            if (fire && lastfire + 250 < Timer.TicksElapsed)
            {
                if (WeaponFired != null)
                {
                    WeaponFired(this, new FireEventArgs(this.Position));
                }

                // dont forget this
                lastfire = Timer.TicksElapsed;
            }
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="args"></param>
        public override void Update(KeyboardEventArgs args)
        {
            if (args == null)
            {
                throw new ArgumentNullException("args");
            }
            switch (args.Key)
            {
                // the =Down trick works quite well
                case Key.LeftArrow:
                    left = args.Down;
                    break;

                case Key.RightArrow:
                    right = args.Down;
                    break;

                case Key.UpArrow:
                    if (args.Down && !falling)
                    {
                        jump = true;
                    }
                    else if (!args.Down)
                    {
                        jump = false;
                        falling = true;
                    }
                    break;
                case Key.Space:
                    fire = args.Down;
                    break;
            }
        }
        /// <summary>
        /// 
        /// </summary>
        public event EventHandler<FireEventArgs> WeaponFired;

        private bool disposed;

        /// <summary>
        /// Destroys the surface object and frees its memory
        /// </summary>
        /// <param name="disposing">If ture, dispose unmanaged resources</param>
        protected override void Dispose(bool disposing)
        {
            try
            {
                if (!this.disposed)
                {
                    if (disposing)
                    {
                    }
                    this.disposed = true;
                }
            }
            finally
            {
                base.Dispose(disposing);
            }
        }
    }
}