游戏人生Silverlight(5) - 星际竞技场[Silverlight 2.0(c#, Farseer Physics Engine)]
2009-06-22 08:33:08 来源:WEB开发网PlayerSprite.cs(玩家 Sprite 模拟器)
using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Collections.Generic;
using FarseerGames.FarseerPhysics.Mathematics;
using FarseerGames.FarseerPhysics;
using FarseerGames.FarseerPhysics.Collisions;
namespace YYArena.Core
{
/**//// <summary>
/// 玩家 Sprite
/// </summary>
public class PlayerSprite : Sprite, IFire
{
private List<Key> _upKeys { get; set; }
private List<Key> _downKeys { get; set; }
private List<Key> _leftKeys { get; set; }
private List<Key> _rightKeys { get; set; }
private List<Key> _fireKeys { get; set; }
private KeyboardHandler _keyHandler;
private IPhysicsControl _physicsControl;
/**//// <summary>
/// 构造函数
/// </summary>
/// <param name="physicsSimulator">PhysicsSimulator</param>
/// <param name="physicsControl">IPhysicsControl</param>
/// <param name="position">初始位置</param>
/// <param name="angle">初始转角</param>
/// <param name="originalVelocity">初始速度</param>
/// <param name="keyboardHandler">KeyboardHandler</param>
/// <param name="up">操作玩家向前移动的按键集合</param>
/// <param name="down">操作玩家向后移动的按键集合</param>
/// <param name="left">操作玩家向左转动的按键集合</param>
/// <param name="right">操作玩家向右转动的按键集合</param>
/// <param name="fire">操作玩家开火的按键集合</param>
public PlayerSprite(PhysicsSimulator physicsSimulator,
IPhysicsControl physicsControl, Vector2 position, float angle, float originalVelocity,
KeyboardHandler keyboardHandler,
List<Key> up, List<Key> down, List<Key> left, List<Key> right, List<Key> fire)
: base(physicsSimulator, physicsControl, position, angle, originalVelocity)
{
PrevFireDateTime = DateTime.MinValue;
MinFireInterval = 500d;
_upKeys = up;
_downKeys = down;
_leftKeys = left;
_rightKeys = right;
_fireKeys = fire;
_keyHandler = keyboardHandler;
_physicsControl = physicsControl;
CompositionTarget.Rendering += new EventHandler(CompositionTarget_Rendering);
}
void CompositionTarget_Rendering(object sender, EventArgs e)
{
if (Enabled)
{
// 如果按了开火键,是否可开火
if (_keyHandler.AnyKeyPressed(_fireKeys) && (DateTime.Now - PrevFireDateTime).TotalMilliseconds > MinFireInterval)
{
PrevFireDateTime = DateTime.Now;
if (Fire != null)
Fire(this, EventArgs.Empty);
}
}
}
public DateTime PrevFireDateTime { get; set; }
public double MinFireInterval { get; set; }
public event EventHandler<EventArgs> Fire;
protected override Vector2 GetForce()
{
Vector2 force = Vector2.Zero;
if (_keyHandler.AnyKeyPressed(_upKeys))
force += Helper.Convert2Vector(_physicsControl.ForceAmount, playerBox.Body.Rotation);
if (_keyHandler.AnyKeyPressed(_downKeys))
force += Helper.Convert2Vector(_physicsControl.ForceAmount, playerBox.Body.Rotation - Helper.Angle2Radian(180));
// 最大线性速度限制
if (playerBox.Body.LinearVelocity.Length() > _physicsControl.MaxLinearVelocity)
force = Vector2.Zero;
return force;
}
protected override float GetTorque()
{
float torque = 0;
if (_keyHandler.AnyKeyPressed(_leftKeys))
torque -= _physicsControl.TorqueAmount;
if (_keyHandler.AnyKeyPressed(_rightKeys))
torque += _physicsControl.TorqueAmount;
// 用于修正 RotationalDragCoefficient (在没有任何 Torque 的情况下,如果转速小于 1.3 则设其为 0)
// 如果不做此修正的话,转速小于 1.3 后还会转好长时间
if (!_keyHandler.AnyKeyPressed(_leftKeys) && !_keyHandler.AnyKeyPressed(_rightKeys) && Math.Abs(playerBox.Body.AngularVelocity) < 1.3)
playerBox.Body.AngularVelocity = 0;
// 最大转速限制
if (Math.Abs(playerBox.Body.AngularVelocity) > _physicsControl.MaxAngularVelocity)
torque = 0;
return torque;
}
}
}
Tags:游戏 人生 Silverlight
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