Royce  Reinger

Royce Reinger


Chrono: High-performance C++ Library for Multiphysics


The structure of the Chrono git repository was changed as follows:

  • The main development branch is now called main (previously develop)
  • The master branch, now obsolete, was deleted
  • Releases are located in branches named release/*.* and have tags of the form *.*.*

Project CHRONO

Distributed under a permissive BSD license, Chrono is an open-source multi-physics package used to model and simulate:

  • dynamics of large systems of connected rigid bodies governed by differential-algebraic equations (DAE)
  • dynamics of deformable bodies governed by partial differential equations (PDE)
  • granular dynamics using either a non-smooth contact formulation resulting in differential variational inequality (DVI) problems or a smooth contact formulation resulting in DAEs
  • fluid-solid interaction problems whose dynamics is governed by coupled DAEs and PDEs
  • first-order dynamic systems governed by ordinary differential equations (ODE)

Chrono provides a mature and stable code base that continues to be augmented with new features and modules. The core functionality of Chrono provides support for the modeling, simulation, and visualization of rigid and flexible multibody systems with additional capabilities offered through optional modules. These modules provide support for additional classes of problems (e.g., granular dynamics and fluid-solid interaction), modeling and simulation of specialized systems (such as ground vehicles), co-simulation, run-time visualization, post-processing, interfaces to external linear solvers, or specialized parallel computing algorithms (multi-core, GPU, and distributed) for large-scale simulations.

Used in many different scientific and engineering problems by researchers from academia, industry, and government, Chrono has mature and sophisticated support for multibody dynamics, finite element analysis, granular dynamics, fluid-solid interaction, ground vehicle simulation and vehicle-terrain interaction.

Implemented almost entirely in C++, Chrono also provides Python and C# APIs. The build system is based on CMake. Chrono is platform-independent and is actively tested on Linux, Windows, and MacOS using a variety of compilers.



Download Details:

Author: Projectchrono
Source Code: 
License: BSD-3-Clause license

#machinelearning #cpluplus #robotics #model #physics #engine 

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Chrono: High-performance C++ Library for Multiphysics
Tamale  Moses

Tamale Moses


How to Run C/C++ in Sublime Text?

C and C++ are the most powerful programming language in the world. Most of the super fast and complex libraries and algorithms are written in C or C++. Most powerful Kernel programs are also written in C. So, there is no way to skip it.

In programming competitions, most programmers prefer to write code in C or C++. Tourist is considered the worlds top programming contestant of all ages who write code in C++.

During programming competitions, programmers prefer to use a lightweight editor to focus on coding and algorithm designing. VimSublime Text, and Notepad++ are the most common editors for us. Apart from the competition, many software developers and professionals love to use Sublime Text just because of its flexibility.

I have discussed the steps we need to complete in this blog post before running a C/C++ code in Sublime Text. We will take the inputs from an input file and print outputs to an output file without using freopen file related functions in C/C++.

#cpp #c #c-programming #sublimetext #c++ #c/c++

Dicey Issues in C/C++

If you are familiar with C/C++then you must have come across some unusual things and if you haven’t, then you are about to. The below codes are checked twice before adding, so feel free to share this article with your friends. The following displays some of the issues:

  1. Using multiple variables in the print function
  2. Comparing Signed integer with unsigned integer
  3. Putting a semicolon at the end of the loop statement
  4. C preprocessor doesn’t need a semicolon
  5. Size of the string matters
  6. Macros and equations aren’t good friends
  7. Never compare Floating data type with double data type
  8. Arrays have a boundary
  9. Character constants are different from string literals
  10. Difference between single(=) and double(==) equal signs.

The below code generates no error since a print function can take any number of inputs but creates a mismatch with the variables. The print function is used to display characters, strings, integers, float, octal, and hexadecimal values onto the output screen. The format specifier is used to display the value of a variable.

  1. %d indicates Integer Format Specifier
  2. %f indicates Float Format Specifier
  3. %c indicates Character Format Specifier
  4. %s indicates String Format Specifier
  5. %u indicates Unsigned Integer Format Specifier
  6. %ld indicates Long Int Format Specifier

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A signed integer is a 32-bit datum that encodes an integer in the range [-2147483648 to 2147483647]. An unsigned integer is a 32-bit datum that encodes a non-negative integer in the range [0 to 4294967295]. The signed integer is represented in twos-complement notation. In the below code the signed integer will be converted to the maximum unsigned integer then compared with the unsigned integer.

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#problems-with-c #dicey-issues-in-c #c-programming #c++ #c #cplusplus

Shaylee  Lemke

Shaylee Lemke


C# Performance tips and tricks

Given the vast amount of C# and the explosive growth in data we’re dealing with, some optimization work has been needed at various times. Most of the big gains come from really re-thinking a problem and approaching it from a whole new angle.

Today however, I wanted to share some C# performance tips that have helped in my recent work. Some of these are fairly micro so don’t just charge out and employ everything here.

#c #c# #c++ #programming-c

Shaylee  Lemke

Shaylee Lemke


How to solve the implicitly declaring library function warning in C

Learn how to solve the implicitly declaring library function warning in C

#c #c# #c++ #programming-c

Shaylee  Lemke

Shaylee Lemke


C# Source Generators to boost performance in .NET 5

A new C# compiler feature that inspects code and generates additional source files promises to improve performance in a number of scenarios.

Microsoft has introduced a preview of a C# compiler capability called Source Generators that can inspect a program and generate source files that can be added to a compilation. Microsoft says Source Generators can improve performance in a number of scenarios.

Introduced April 29, a Source Generator is a piece of code (a .NET Standard 2.0 assembly) that runs during compilation and can inspect a program to produce additional files that are compiled together with the rest of the code.

#c #c# #c++ #programming-c