/// <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);
}
private void CacheChangeData(BulletParasChangeData changeData)
{
changeData.isCached = true;
float beginValue;
if (!_bullet.GetBulletPara(changeData.paraType, out beginValue))
{
changeData.isFinish = true;
Logger.LogWarn("ParasChange Warn :ParaType is not valid for bullet");
}
else
{
changeData.begin = beginValue;
float value = GetValueByChangeValue(changeData.changeValue);
switch (changeData.changeMode)
{
case ParaChangeMode.ChangeTo:
changeData.end = value;
break;
case ParaChangeMode.IncBy:
changeData.end = changeData.begin + value;
break;
case ParaChangeMode.DecBy:
changeData.end = changeData.begin - value;
break;
}
}
}
/// <summary>
/// 获取子弹的属性
/// <para>bullet</para>
/// <para>BulletParaType paraType</para>
/// </summary>
/// <param name="luaState"></param>
/// <returns></returns>
public static int GetBulletPara(ILuaState luaState)
{
EnemyBulletBase bullet = luaState.ToUserData(-2) as EnemyBulletBase;
BulletParaType paraType = (BulletParaType)luaState.ToInteger(-1);
luaState.Pop(2);
float value;
if (bullet.GetBulletPara(paraType, out value))
{
luaState.PushNumber(value);
return(1);
}
Logger.LogWarn("BulletPara " + paraType + " in " + bullet.Type + " is not exist!");
return(0);
}
