/// <summary>
/// 根据ChangeValue的值获取对应的值并返回
/// </summary>
/// <param name="changeValue"></param>
/// <returns></returns>
private float GetValueByChangeValue(ParaChangeValue changeValue)
{
float value = 0;
if (changeValue.argType == 0)
{
value = changeValue.arg0;
}
else if (changeValue.argType == 1)
{
Vector2 playerPos = new Vector2(Global.PlayerPos.x, Global.PlayerPos.y);
Vector2 bulletPos = _bullet.GetPosition();
float angle = MathUtil.GetAngleBetweenXAxis(playerPos - bulletPos);
value = angle;
}
else if (changeValue.argType == 2)
{
Vector2 targetPos = new Vector2(changeValue.arg0, changeValue.arg1);
Vector2 bulletPos = _bullet.GetPosition();
float angle = MathUtil.GetAngleBetweenXAxis(targetPos - bulletPos);
value = angle;
}
if (changeValue.offset != 0)
{
value += MTRandom.GetNextFloat(-changeValue.offset, changeValue.offset);
}
return(value);
}
/// <summary>
/// 做加速运动(限制最大速度)
/// <para>bullet 敌机子弹</para>
/// <para>float acce 加速度</para>
/// <para>float angle 速度方向 or bool useVAngle使用速度方向</para>
/// <para>bool isAimToPlayer 是否朝向玩家</para>
/// <para>float maxVelocity 最大速度限制</para>
/// </summary>
/// <param name="luaState"></param>
/// <returns></returns>
public static int EnemyBulletDoAccelerationWithLimitation(ILuaState luaState)
{
EnemyBulletBase bullet = luaState.ToUserData(-5) as EnemyBulletBase;
float acce = (float)luaState.ToNumber(-4);
float angle;
if (luaState.Type(-3) == LuaType.LUA_TBOOLEAN)
{
bullet.GetBulletPara(BulletParaType.VAngel, out angle);
}
else
{
angle = (float)luaState.ToNumber(-3);
}
bool isAimToPlayer = luaState.ToBoolean(-2);
float maxVelocity = (float)luaState.ToNumber(-1);
luaState.Pop(5);
if (isAimToPlayer)
{
Vector2 playerPos = PlayerInterface.GetInstance().GetCharacter().GetPosition();
angle += MathUtil.GetAngleBetweenXAxis(playerPos - bullet.GetPosition());
}
bullet.DoAccelerationWithLimitation(acce, angle, maxVelocity);
return(0);
}
/// <summary>
/// 设置敌机子弹的直线运动参数
/// <para>bullet</para>
/// <para>v</para>
/// <para>vAngle</para>
/// <para>bool isAimToPlayer</para>
/// <para>acce</para>
/// <para>accAngle</para>
/// <para>maxV</para>
/// </summary>
/// <param name="luaState"></param>
/// <returns></returns>
public static int EnemyBulletSetStraightParas(ILuaState luaState)
{
EnemyBulletBase bullet = luaState.ToUserData(-6) as EnemyBulletBase;
float v = (float)luaState.ToNumber(-5);
float angle = (float)luaState.ToNumber(-4);
bool isAimToPlayer = luaState.ToBoolean(-3);
float acce = (float)luaState.ToNumber(-2);
float accAngle;
if (luaState.Type(-1) == LuaType.LUA_TBOOLEAN)
{
accAngle = angle;
}
else
{
accAngle = (float)luaState.ToNumber(-1);
}
if (isAimToPlayer)
{
Vector2 playerPos = PlayerInterface.GetInstance().GetCharacter().GetPosition();
float relAngle = MathUtil.GetAngleBetweenXAxis(playerPos - bullet.GetPosition());
angle += relAngle;
accAngle += relAngle;
}
bullet.SetStraightParas(v, angle, acce, accAngle);
return(0);
}
/// <summary>
/// 做直线运动
/// <para>bullet 敌机子弹</para>
/// <para>float v 速度</para>
/// <para>float angle 速度方向</para>
/// <para>bool isAimToPlayer 是否朝向玩家</para>
/// </summary>
/// <param name="luaState"></param>
/// <returns></returns>
public static int EnemyBulletDoStraightMove(ILuaState luaState)
{
EnemyBulletBase bullet = luaState.ToUserData(-4) as EnemyBulletBase;
float v = (float)luaState.ToNumber(-3);
float angle = (float)luaState.ToNumber(-2);
bool isAimToPlayer = luaState.ToBoolean(-1);
luaState.Pop(4);
if (isAimToPlayer)
{
Vector2 playerPos = PlayerInterface.GetInstance().GetCharacter().GetPosition();
angle += MathUtil.GetAngleBetweenXAxis(playerPos - bullet.GetPosition());
}
bullet.DoStraightMove(v, angle);
return(0);
}