/// ------------------------------------------------ //
/// [4/18/2014 jianglei.kinly]
/// 扇形
/// ------------------------------------------------ //
xObjectSet XGameMap::CaptureObjectBySector( const XVector3& vCenter, const XVector3& vDir, xgc_uint32 dwRadius, xgc_uint16 wAngle, const std::function< xgc_bool( xObject ) > &fnFilter/* = xgc_nullptr*/ )
{
// 计算旋转向量
XVector3 vRotate = vDir.RotateZ( DEG2RAD( wAngle / 2 ) );
xgc_real32 fDotValue = vDir.DotProduct( vRotate );
auto fn = [&]( xObject hObject )->xgc_bool {
if( xgc_nullptr == fnFilter || fnFilter( hObject ) )
{
XGameObject* pObj = ObjectCast<XGameObject>( hObject );
XGC_ASSERT_RETURN( pObj, false );
XVector3 vDistance = pObj->GetPosition() - vCenter;
if( vDistance.SqurLength() > dwRadius * dwRadius * 1.0f )
return false;
if( vDir.DotProduct( vDistance ) < fDotValue )
return false;
return true;
}
return false;
};
iRect rc(
WorldToArea( vCenter.x - dwRadius, vCenter.y - dwRadius ),
WorldToArea( vCenter.x + dwRadius, vCenter.y + dwRadius ) );
return FetchObject( rc, fn );
}
