【golang/g3n】3D游戏引擎G3N的windows安装与测试

说在前面

操作系统：win 11
go version：go1.21.5 windows/amd64
g3n版本：github.com/g3n/engine v0.2.0
其他：找了下golang 3d相关的库，目前好像就这个比较活跃

安装

按照官方教程所说，需要mingw环境，首先按照教程去下载

We tested the Windows build using the mingw-w64 toolchain (you can download this file in particular).
下载后将文件解压，并添加环境变量(主要是bin、include、lib)

然后下载g3n源代码

git clone https://github.com/g3n/engine g3n-engine

同样添加下环境变量

重启
然后可以开始install了
```
cd g3n-engine
go install ./...
```

测试

创建一个空文件加，创建一个main.go 文件

package mainimport ("time""github.com/g3n/engine/app""github.com/g3n/engine/camera""github.com/g3n/engine/core""github.com/g3n/engine/geometry""github.com/g3n/engine/gls""github.com/g3n/engine/graphic""github.com/g3n/engine/gui""github.com/g3n/engine/light""github.com/g3n/engine/material""github.com/g3n/engine/math32""github.com/g3n/engine/renderer""github.com/g3n/engine/util/helper""github.com/g3n/engine/window"
)func main() {// 创建appa := app.App()// 创建scenescene := core.NewNode()// 设置gui控制器gui.Manager().Set(scene)// 创建相机cam := camera.New(1)cam.SetPosition(0, 0, 3)scene.Add(cam)// 初始化相机控制器camera.NewOrbitControl(cam)// 设置窗口回调onResize := func(evname string, ev interface{}) {// Get framebuffer size and update viewport accordinglywidth, height := a.GetSize()a.Gls().Viewport(0, 0, int32(width), int32(height))// Update the camera's aspect ratiocam.SetAspect(float32(width) / float32(height))}a.Subscribe(window.OnWindowSize, onResize)onResize("", nil)// 添加一个蓝色甜甜圈geom := geometry.NewTorus(1, .4, 12, 32, math32.Pi*2)mat := material.NewStandard(math32.NewColor("DarkBlue"))mesh := graphic.NewMesh(geom, mat)scene.Add(mesh)// 添加一个改变甜甜圈颜色的按钮btn := gui.NewButton("Make Red")btn.SetPosition(100, 40)btn.SetSize(40, 40)btn.Subscribe(gui.OnClick, func(name string, ev interface{}) {mat.SetColor(math32.NewColor("DarkRed"))})scene.Add(btn)// 添加光照scene.Add(light.NewAmbient(&math32.Color{1.0, 1.0, 1.0}, 0.8))pointLight := light.NewPoint(&math32.Color{1, 1, 1}, 5.0)pointLight.SetPosition(1, 0, 2)scene.Add(pointLight)// 添加坐标系显示scene.Add(helper.NewAxes(0.5))// 设置灰色背景色a.Gls().ClearColor(0.5, 0.5, 0.5, 1.0)// 运行应用a.Run(func(renderer *renderer.Renderer, deltaTime time.Duration) {a.Gls().Clear(gls.DEPTH_BUFFER_BIT | gls.STENCIL_BUFFER_BIT | gls.COLOR_BUFFER_BIT)renderer.Render(scene, cam)})
}