生命在于折腾啊。生命不息,折腾不止。
嗯,准备写一个类似Mineccraft的游戏
基本设定已经弄好了
不过目测是个大坑
希望到时候别弃坑吧
求有经验的人帮忙啊……
下面是go-gl的example源码
顺便测试一下代码高亮
package mainimport ( "errors" "fmt" "github.com/go-gl/gl" glfw "github.com/go-gl/glfw3" "image" "image/png" "io" "os")const ( Title = "Spinning Gopher" Width = 640 Height = 480)var ( texture gl.Texture rotx, roty float32 ambient []float32 = []float32{0.5, 0.5, 0.5, 1} diffuse []float32 = []float32{1, 1, 1, 1} lightpos []float32 = []float32{-5, 5, 10, 0})func errorCallback(err glfw.ErrorCode, desc string) { fmt.Printf("%v: %v\n", err, desc)}func main() { glfw.SetErrorCallback(errorCallback) if !glfw.Init() { panic("Can't init glfw!") } defer glfw.Terminate() window, err := glfw.CreateWindow(Width, Height, Title, nil, nil) if err != nil { panic(err) } window.MakeContextCurrent() glfw.SwapInterval(1) gl.Init() if err := initScene(); err != nil { fmt.Fprintf(os.Stderr, "init: %s\n", err) return } defer destroyScene() for !window.ShouldClose() { drawScene() window.SwapBuffers() glfw.PollEvents() }}func createTexture(r io.Reader) (gl.Texture, error) { img, err := png.Decode(r) if err != nil { return gl.Texture(0), err } rgbaImg, ok := img.(*image.NRGBA) if !ok { return gl.Texture(0), errors.New("texture must be an NRGBA image") } textureId := gl.GenTexture() textureId.Bind(gl.TEXTURE_2D) gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR) gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR) // flip image: first pixel is lower left corner imgWidth, imgHeight := img.Bounds().Dx(), img.Bounds().Dy() data := make([]byte, imgWidth*imgHeight*4) lineLen := imgWidth * 4 dest := len(data) - lineLen for src := 0; src < len(rgbaImg.Pix); src += rgbaImg.Stride { copy(data[dest:dest+lineLen], rgbaImg.Pix[src:src+rgbaImg.Stride]) dest -= lineLen } gl.TexImage2D(gl.TEXTURE_2D, 0, 4, imgWidth, imgHeight, 0, gl.RGBA, gl.UNSIGNED_BYTE, data) return textureId, nil}func initScene() (err error) { gl.Enable(gl.TEXTURE_2D) gl.Enable(gl.DEPTH_TEST) gl.Enable(gl.LIGHTING) gl.ClearColor(0.5, 0.5, 0.5, 0.0) gl.ClearDepth(1) gl.DepthFunc(gl.LEQUAL) gl.Lightfv(gl.LIGHT0, gl.AMBIENT, ambient) gl.Lightfv(gl.LIGHT0, gl.DIFFUSE, diffuse) gl.Lightfv(gl.LIGHT0, gl.POSITION, lightpos) gl.Enable(gl.LIGHT0) gl.Viewport(0, 0, Width, Height) gl.MatrixMode(gl.PROJECTION) gl.LoadIdentity() gl.Frustum(-1, 1, -1, 1, 1.0, 10.0) gl.MatrixMode(gl.MODELVIEW) gl.LoadIdentity() goph, err := os.Open("gopher.png") if err != nil { panic(err) } defer goph.Close() texture, err = createTexture(goph) return}func destroyScene() { texture.Delete()}func drawScene() { gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT) gl.MatrixMode(gl.MODELVIEW) gl.LoadIdentity() gl.Translatef(0, 0, -3.0) gl.Rotatef(rotx, 1, 0, 0) gl.Rotatef(roty, 0, 1, 0) rotx += 0.5 roty += 0.1 texture.Bind(gl.TEXTURE_2D) gl.Color4f(1, 1, 1, 1) gl.Begin(gl.QUADS) gl.Normal3f(0, 0, 1) gl.TexCoord2f(0, 0) gl.Vertex3f(-1, -1, 1) gl.TexCoord2f(1, 0) gl.Vertex3f(1, -1, 1) gl.TexCoord2f(1, 1) gl.Vertex3f(1, 1, 1) gl.TexCoord2f(0, 1) gl.Vertex3f(-1, 1, 1) gl.Normal3f(0, 0, -1) gl.TexCoord2f(1, 0) gl.Vertex3f(-1, -1, -1) gl.TexCoord2f(1, 1) gl.Vertex3f(-1, 1, -1) gl.TexCoord2f(0, 1) gl.Vertex3f(1, 1, -1) gl.TexCoord2f(0, 0) gl.Vertex3f(1, -1, -1) gl.Normal3f(0, 1, 0) gl.TexCoord2f(0, 1) gl.Vertex3f(-1, 1, -1) gl.TexCoord2f(0, 0) gl.Vertex3f(-1, 1, 1) gl.TexCoord2f(1, 0) gl.Vertex3f(1, 1, 1) gl.TexCoord2f(1, 1) gl.Vertex3f(1, 1, -1) gl.Normal3f(0, -1, 0) gl.TexCoord2f(1, 1) gl.Vertex3f(-1, -1, -1) gl.TexCoord2f(0, 1) gl.Vertex3f(1, -1, -1) gl.TexCoord2f(0, 0) gl.Vertex3f(1, -1, 1) gl.TexCoord2f(1, 0) gl.Vertex3f(-1, -1, 1) gl.Normal3f(1, 0, 0) gl.TexCoord2f(1, 0) gl.Vertex3f(1, -1, -1) gl.TexCoord2f(1, 1) gl.Vertex3f(1, 1, -1) gl.TexCoord2f(0, 1) gl.Vertex3f(1, 1, 1) gl.TexCoord2f(0, 0) gl.Vertex3f(1, -1, 1) gl.Normal3f(-1, 0, 0) gl.TexCoord2f(0, 0) gl.Vertex3f(-1, -1, -1) gl.TexCoord2f(1, 0) gl.Vertex3f(-1, -1, 1) gl.TexCoord2f(1, 1) gl.Vertex3f(-1, 1, 1) gl.TexCoord2f(0, 1) gl.Vertex3f(-1, 1, -1) gl.End()}