three_cpp | A port of three.js to C++ | Graphics library

by jdduke C Version: Current License: MIT

X-Ray Key Features Code Snippets Community Discussions(1)Vulnerabilities Install Support

kandi X-RAY | three_cpp Summary

three_cpp is a C library typically used in User Interface, Graphics, Three.js, WebGL applications. three_cpp has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

A port of three.js to C++

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Quality

Security

License

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Support

three_cpp has a low active ecosystem.

It has 398 star(s) with 51 fork(s). There are 53 watchers for this library.

It had no major release in the last 6 months.

There are 13 open issues and 5 have been closed. On average issues are closed in 5 days. There are 1 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of three_cpp is current.

Quality

three_cpp has no bugs reported.

Security

three_cpp has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

three_cpp is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

three_cpp releases are not available. You will need to build from source code and install.

Installation instructions, examples and code snippets are available.

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three_cpp Key Features

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three_cpp Examples and Code Snippets

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Community Discussions

Trending Discussions on three_cpp

Multiple definition error (collect2: error: ld returned 1 exit status)

QUESTION

Multiple definition error (collect2: error: ld returned 1 exit status)

Asked 2020-Sep-08 at 06:09

I was using https://github.com/jdduke/three_cpp as a header-only mode but faced some issues while compiling the same with my project.

The issue happens when I include the following matrix4.hpp header (only necessary part is included) in more than one C++ files

three/core/matrix4.hpp (removed unwanted parts)

...

ANSWER

Answered 2020-Sep-08 at 06:09

This is due to the restriction based on ODR.

Why multiple definition error has occurred even if the same header is included in different compilation units?

As mentioned in the comments this is due to restrictions in the One Definition Rule(ODR).

The One Definition Rule (ODR) is an important rule of the C++ programming language that prescribes that objects and non-inline functions cannot have more than one definition in the entire program and template and types cannot have more than one definition by translation unit. It is defined in the ISO C++ Standard (ISO/IEC 14882) 2003, at section 3.2.

So it also answers your second query.

What will be the significance of adding THREE_DECL for resolving these issues?

If you check pros of using inline functions it gives you significance for the usage of inline keyword.

By marking it as inline, you can put a function definition in a header file (i.e. it can be included in multiple compilation unit, without the linker complaining).

So if you change your functions to inline, multiple definitions will not occur.

Source https://stackoverflow.com/questions/63777173

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install three_cpp

git clone git://github.com/jdduke/three_cpp
cd three_cpp

Support

You’ll need a sufficiently modern C++11 compiler: * >= Clang 3.1 * >= GCC 4.6.3 * MSVC 2012. Implemented functionality tested via examples, and working on: * Mint 13 with GCC 4.6.3 * Win 7 with both MSVC 2012 and MinGW (GCC 4.8 and 4.7) * OSX with GCC 4.7.2 and Clang 3.1. Some examples might be a little flaky on any given platform. * MSVC 2012: This has been just a pain to support (no variadics, no initializer lists, no default/deleted functions, no constexpr etc…), and support may be dropped at some point in the future. Update: With the November 2012 CTP, things have improved a great deal; * OSX: VSync is on for all samples, I haven’t bothered to take a closer look.

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