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Update to 5.1.6+use dll+update readme

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bloeys
2022-01-22 03:39:12 +04:00
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@ -34,8 +34,8 @@ Then simply clone and use `go run .`
> Note: that it might take a while to run the first time because of downloading/compiling dependencies.
`assimp-go` statically links AssImp using platform dependent libraries.
Currently only `Windows` libraries are available, but more should be easy to add by statically compiling assimp on the wanted platform. (Make a PR if you can help us get those binaries!)
`assimp-go` dynamically links (e.g. through a DLL) AssImp using platform dependent libraries, which are made available with the GitHub releases.
Currently only `Windows` libraries are available, but more should be easy to add by compiling AssImp on the wanted platform. (Make a PR if you can help us get those binaries!)
### Getting Started
@ -84,30 +84,28 @@ While `asig` functions should NOT be called on a Scene (or its objects) after th
## Developing assimp-go
We link against static assimp libraries that are built for each platform and added to the `asig/libs` package.
We link against assimp libraries that are built for each platform and the `*.a` files are added to the `asig/libs` package.
Depending on the platform we select one of them and link against it when doing `go build`.
The general steps are:
- Copy assimp includes into `asig/assimp`
- Copy `zlib.h`, `zconf.h` and `irrXML.h` into `asig/zlib` and `asig/irrxml` respectively.
- Copy static libraries into `asig/libs`
- Generate the wrappers using `swig -go -c++ -intgosize 64 asig/asig.i`
- Add `#cgo LDFLAGS: -L ./staticLibs -l zlibstatic -l IrrXML -l assimp` at the top of the 'C' import in `asig.go`
* Copy assimp includes into `asig/assimp`
* Copy `zlib.h`, `zconf.h` and `irrXML.h` into `asig/zlib` and `asig/irrxml` respectively.
* Copy static libraries and DLL import libraries into `asig/libs`
> Note: When dealing with static libraries the compiler will probably (e.g. MinGW does this) ignore `lib` suffixes and `.a`/`.lib` suffixes.
> Note: When dealing with libraries the compiler will probably (e.g. MinGW does this) ignore `lib` prefixes and `.a`/`.lib` suffixes.
So if your lib name is `libassimp.a` you need to pass it to CGO as `-l assimp`, otherwise you will get an error about library not found.
For platform specific steps:
**Windows**:
> Note: You must compile with the same C/C++ compiler you use with Go (e.g. if you use MinGW with Go, then compile assimp with MinGW by sepcifying the correct `-G` option)
> Note: You must compile with the same C/C++ compiler you use with Go (e.g. if you use MinGW with Go, then compile assimp with MinGW by specifying the correct `-G` option to cMake)
---
> Note: If you get compilation errors with things like `File too big` or `can't write 166 bytes to section` then cmake isn't detecting you are using MinGW, so add this flag `-D CMAKE_COMPILER_IS_MINGW=TRUE`
Now assuming you are using MinGW on windows:
- Clone wanted release of assimp and run `cmake CMakeLists.txt -D BUILD_SHARED_LIBS=OFF -D ASSIMP_BUILD_ZLIB=ON -D ASSIMP_BUILD_ASSIMP_TOOLS=OFF -D ASSIMP_BUILD_TESTS=OFF -G "MinGW Makefiles"` in the root folder
- Run `cmake --build . --parallel 6`
- Copy the generated `*.lib` (or `*.a`) files into `asig/lib`
* Clone wanted release of assimp and run `cmake CMakeLists.txt -D ASSIMP_BUILD_ASSIMP_TOOLS=OFF -G "MinGW Makefiles"` in the root folder
* Run `cmake --build . --parallel 6`
* Copy the generated `*.lib` (or `*.a`) files from the `lib` folder and into `asig/lib`, and copy the generated dll from AssImp `bin` folder into the root of `assimp-go`.