# DDKalTest [](https://github.com/iLCSoft/DDKalTest/actions/workflows/linux.yml) [](https://scan.coverity.com/projects/ilcsoft-ddkaltest) interface between KalTest fitter and DD4hep based geometry DDKalTest is distributed under the [GPLv3 License](http://www.gnu.org/licenses/gpl-3.0.en.html) [](https://www.gnu.org/licenses/gpl-3.0.en.html) ## Description Re-implentation of some of the code in KalDet, now using the DDRec:Surface provided by a DD4hep based tracking geometry as input for the measurement surfaces needed in KalTest. Intersection calculation is currently done in aidaTT. Material effects use averaged material from the DDRec:Surface. Main classes: * cylindrical measurement layers (1D,2D): * DDCylinderMeasLayer * DDCylinderHit * planar measurement layers (1D,2D, along and orthogonal to z): * DDParallelPlanarMeasLayer * DDPlanarMeasLayer * DDDiskMeasLayer ( same as DDPlanarMeasLayer) * DDPlanarHit * generic detector set up from a DD4hep based tracking model * DDKalDetector * measurement layer base classes: handles material effects (E-loss and MSq) * DDVMeasLayer ## License and Copyright Copyright (C), DDKalTest Authors DDKalTest 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 3 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 long with this program. If not, see <http://www.gnu.org/licenses/>.