CrossR / detray

Test library for detector surface intersection

detray

Detray is part of the ACTS project (R&D line for parallelization), the ACTS project can be found: https://github.com/acts-project/acts.

This is a C++17 header only library for detector surface intersections using different algebra plugin libraries. It follows the navigation and propagation concept of ACTS, however, with an attempt to create a geometry without polymorphic inheritance structure.

Requirements and dependencies

OS & compilers:

• The C++ compiler must support C++20
• The CUDA Toolkit version must be greater than major version 11

Dependency

• CMake

Getting started

The respository is meant to be possible to build "out of the box", with standard CMake build procedures.

git clone https://github.com/acts-project/detray.git
cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo -S detray -B detray-build
cmake --build detray-build

For tests and benchmarks with the inhomogeneous magnetic field, the ODD field in covfie format should be downloaded and the environment variable should be set.

cd detray/data
bash detray_data_get_files.sh
export DETRAY_BFIELD_FILE="${PWD}/odd-bfield_v0_9_0.cvf"

Build options

Option	Description	Default
DETRAY_BUILD_CUDA	Build the CUDA sources included in detray	ON (if available)
DETRAY_BUILD_SYCL	Build the SYCL sources included in detray	OFF
DETRAY_BUILD_TESTING	Build the (unit) tests of detray	ON
DETRAY_BUILD_TUTORIALS	Build the examples of detray	ON
DETRAY_CUSTOM_SCALARTYPE	Floating point precision	double
DETRAY_EIGEN_PLUGIN	Build Eigen math plugin	ON
DETRAY_SMATRIX_PLUGIN	Build ROOT/SMatrix math plugin	OFF
DETRAY_VC_PLUGIN	Build Vc based math plugin	ON
DETRAY_SVG_DISPLAY	Build ActSVG display module	OFF

Continuous benchmark

Monitoring the propagation speed with the toy geometry