https://github.com/fraya/dylan-nbody

N body problem written in Open dylan
https://github.com/fraya/dylan-nbody

Last synced: 3 months ago
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N body problem written in Open dylan

• Host: GitHub
• URL: https://github.com/fraya/dylan-nbody
• Owner: fraya
• License: gpl-3.0
• Created: 2023-07-12T20:56:44.000Z (almost 3 years ago)
• Default Branch: main
• Last Pushed: 2024-01-18T05:34:53.000Z (over 2 years ago)
• Last Synced: 2024-01-18T10:56:01.298Z (over 2 years ago)
• Language: Dylan
• Size: 38.1 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# dylan-nbody

N body problem written in Open dylan

This code is a test vehicle for my vector library

[v3d](http://github.com/fraya/v3d) and is **NOT performance driven**.

For a competitive example see

[shootout/n-body.dylan](https://github.com/dylan-lang/shootout/blob/master/n-body.dylan).

## Usage

Clone the repository:

    git clone http://github.com/fraya/dylan-nbody

Enter in the directory created and update dependencies:

    dylan update

Compile the program:

    dylan build dylan-nbody-app

Execute the program in directory `../_build/bin`, passing the

number of steps to simulate, for instance `1000000`:

    dylan-nbody-app --steps 1000000

The output is:

    -0.1690752d0

    -0.1690862d0

# Sequence diagram

The following sequence diagram shows the execution of the main

program.

```mermaid

sequenceDiagram

  participant User

  participant System

  User->>System: offset-momentum!(zero)

  User->>System: energy

  loop steps

    User->>System: advance!(delta)

  end

  User->>System: energy

```