Update to 5.1.6+use dll+update readme

README.md

@@ -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.
+`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 statically compiling assimp on the wanted platform. (Make a PR if you can help us get those binaries!)
+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 assimp includes into `asig/assimp`
-- Copy `zlib.h`, `zconf.h` and `irrXML.h` into `asig/zlib` and `asig/irrxml` respectively.
+* Copy `zlib.h`, `zconf.h` and `irrXML.h` into `asig/zlib` and `asig/irrxml` respectively.
-- Copy static libraries into `asig/libs`
+* Copy static libraries and DLL import 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`
 
-> 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
+* 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`
+* Run `cmake --build . --parallel 6`
-- Copy the generated `*.lib` (or `*.a`) files into `asig/lib`
+* 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`.

asig/asig.go

@@ -4,15 +4,8 @@ package asig
 #cgo CFLAGS: -I .
 #cgo LDFLAGS: -L ./libs -l assimp_windows_amd64 -l IrrXML_windows_amd64 -l zlib_windows_amd64
 
+#include <wrap.cxx>
 #include <stdlib.h> //Needed for C.free
-
-#include <assimp/scene.h>
-
-//Functions
-struct aiScene* aiImportFile(const char* pFile, unsigned int pFlags);
-void aiReleaseImport(const struct aiScene* pScene);
-const char* aiGetErrorString();
-unsigned int aiGetMaterialTextureCount(const struct aiMaterial* pMat, enum aiTextureType type);
 */
 import "C"
 import (

go.mod

@@ -2,4 +2,4 @@ module github.com/bloeys/assimp-go
 
 go 1.17
 
-require github.com/bloeys/gglm v0.2.6
+require github.com/bloeys/gglm v0.3.1

go.sum

@@ -1,2 +1,4 @@
 github.com/bloeys/gglm v0.2.6 h1:+6m+GZuabU9GRhtEfqz7NS3fewO1xMcjJEenKVPRosM=
 github.com/bloeys/gglm v0.2.6/go.mod h1:qwJQ0WzV191wAMwlGicbfbChbKoSedMk7gFFX6GnyOk=
+github.com/bloeys/gglm v0.3.1 h1:Sy9upW7SBsBfDXrSmEhid3aQ+7J7itej+upwcxOnPMQ=
+github.com/bloeys/gglm v0.3.1/go.mod h1:qwJQ0WzV191wAMwlGicbfbChbKoSedMk7gFFX6GnyOk=

main.go

@@ -10,7 +10,7 @@ import (
 
 func main() {
 
-	scene, release, err := asig.ImportFile("obj2.fbx", asig.PostProcessTriangulate|asig.PostProcessJoinIdenticalVertices)
+	scene, release, err := asig.ImportFile("obj.obj", asig.PostProcessTriangulate|asig.PostProcessJoinIdenticalVertices)
 	if err != nil {
 		panic(err)
 	}