Golang gl.ActiveTexture函数代码示例

func (s *Shader) assign(ptr unsafe.Pointer, val reflect.Value, typ reflect.Type, name string) error {
	u := s.prog.GetUniformLocation(name)
	if u < 0 {
		return fmt.Errorf("gfx: unknown uniform variable '%s'", name)
	}
	if typ.Kind() == reflect.Ptr {
		if s.assignPrimitive(unsafe.Pointer(val.Pointer()), typ.Elem(), u) {
			return nil
		}
	} else if s.assignPrimitive(ptr, typ, u) {
		return nil
	}
	iface := val.Interface()
	switch iface.(type) {
	// special types
	case *Sampler2D:
		sampler := iface.(*Sampler2D)
		texunit := s.texunit(u)
		gl.ActiveTexture(gl.TEXTURE0 + gl.GLenum(texunit))
		sampler.bind()
		u.Uniform1i(texunit)
	default:
		return fmt.Errorf("gfx: invalid uniform type %v", typ)
	}
	return nil
}

func handleText(camera *PerspectiveCamera, text *Text) {
	// Material
	material := text.Material()
	program := material.Program()
	if program == nil {
		program = createTextProgram(text)
		material.SetProgram(program)
	}
	program.Use()
	defer program.Unuse()

	if c, ok := material.(Colored); ok {
		if c.Color() != nil {
			program.uniforms["diffuse"].apply(c.Color())
		}
	}

	if t, ok := material.(Textured); ok {
		texture := t.Texture()
		if texture != nil {
			gl.ActiveTexture(gl.TEXTURE0)
			texture.Bind()
			defer texture.Unbind()
			program.uniforms["texture"].apply(texture)
		}
	}

	for _, attribute := range program.attributes {
		attribute.enable()
		defer attribute.disable()
		attribute.bindBuffer()
		defer attribute.unbindBuffer()
		attribute.pointer()
		attribute.bindBuffer()
	}

	vertexAttrib := gl.AttribLocation(0)
	vertexAttrib.EnableArray()
	defer vertexAttrib.DisableArray()
	text.vertexBuffer.Bind(gl.ARRAY_BUFFER)
	defer text.vertexBuffer.Unbind(gl.ARRAY_BUFFER)
	vertexAttrib.AttribPointer(2, gl.FLOAT, false, 0, nil)

	if t, ok := material.(Wireframed); ok {
		if t.Wireframe() {
			gl.PolygonMode(gl.FRONT_AND_BACK, gl.LINE)
		} else {
			gl.PolygonMode(gl.FRONT_AND_BACK, gl.FILL)
		}
	}

	gl.Enable(gl.BLEND)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)

	gl.DrawArrays(gl.TRIANGLES, 0, len(text.Geometry().Vertices))
}

func (bank *TextureBank) Enter() {
	for key, value := range bank.Samplers {
		value.Parameters(&bank.SamplerParameters[key])
	}
	for key, value := range bank.Units {
		gl.ActiveTexture(gl.TEXTURE0 + gl.GLenum(key))
		value.Texture.Bind(value.Target)
		value.Sampler.Bind(gl.GLuint(key))
	}
}

func Tick() {
	timer = float32(glfw.Time())

	gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)

	program.Use()

	camera.Tick()

	modelViewMatrixUniform.UniformMatrix4fv(camera.modelViewMatrix[:])
	projectionMatrixUniform.UniformMatrix4fv(camera.projectionMatrix[:])
	timerUniform.Uniform1f(timer)

	positionAttrib.EnableArray()
	texcoordAttrib.EnableArray()

	gl.ActiveTexture(gl.TEXTURE0)
	textures[0].Bind(gl.TEXTURE_2D)
	textureUniforms[0].Uniform1i(0)

	gl.ActiveTexture(gl.TEXTURE1)
	textures[1].Bind(gl.TEXTURE_2D)
	textureUniforms[1].Uniform1i(1)

	sizeOfVertex := int(unsafe.Sizeof(Vertex{}))
	posoffset := uintptr(0)
	texoffset := unsafe.Offsetof(Vertex{}.texcoord)
	for _, renderObject := range renderObjects {
		renderObject.vertexBuffer.Bind(gl.ARRAY_BUFFER)
		positionAttrib.AttribPointer(3, gl.FLOAT, false, sizeOfVertex, posoffset)
		texcoordAttrib.AttribPointer(2, gl.FLOAT, false, sizeOfVertex, texoffset)

		gl.DrawArrays(gl.TRIANGLES, 0, renderObject.numVerticies)
	}

	positionAttrib.DisableArray()
	texcoordAttrib.DisableArray()
	gl.ProgramUnuse()

	glfw.SwapBuffers()
}

func (sp *Sprite) DrawScreen() {
	if sp.Texture != nil && sp.Render {

		camera := GetScene().SceneBase().Camera
		pos := sp.Transform().WorldPosition()
		scale := sp.Transform().WorldScale()

		TextureMaterial.Begin(sp.GameObject())

		mp := TextureMaterial.ProjMatrix
		mv := TextureMaterial.ViewMatrix
		mm := TextureMaterial.ModelMatrix
		tx := TextureMaterial.Texture
		ac := TextureMaterial.AddColor
		ti := TextureMaterial.Tiling
		of := TextureMaterial.Offset

		defaultBuffer.Bind(gl.ARRAY_BUFFER)
		TextureMaterial.Verts.EnableArray()
		TextureMaterial.Verts.AttribPointer(3, gl.FLOAT, false, 0, uintptr(0))
		TextureMaterial.UV.EnableArray()
		TextureMaterial.UV.AttribPointer(2, gl.FLOAT, false, 0, uintptr(12*4))

		currentUV := sp.UVs[int(sp.animation)]

		view := Identity()
		model := Identity()
		model.Scale(scale.X*currentUV.Ratio, scale.Y, 1)
		model.Translate((float32(Width)/2)+pos.X+0.75, (float32(Height)/2)+pos.Y+0.75, 1)

		mv.UniformMatrix4fv(false, view)
		mp.UniformMatrix4f(false, (*[16]float32)(camera.Projection))
		mm.UniformMatrix4fv(false, model)

		ti.Uniform2f((currentUV.U2-currentUV.U1)*sp.Tiling.X, (currentUV.V2-currentUV.V1)*sp.Tiling.Y)
		of.Uniform2f(currentUV.U1, currentUV.V1)

		sp.Bind()
		gl.ActiveTexture(gl.TEXTURE0)
		tx.Uniform1i(0)

		//ac.Uniform4f(1, 1, 1, 0)
		ac.Uniform4f(sp.Color.R, sp.Color.G, sp.Color.B, sp.Color.A)

		gl.DrawArrays(gl.QUADS, 0, 4)

		TextureMaterial.End(sp.GameObject())
	}
}

func (d *DrawImage) setUniforms() error {
	p := d.program
	gl.ActiveTexture(gl.TEXTURE0)
	d.Image.atlas.bind()
	panicGlError()

	loc := p.GetUniformLocation("mysample")
	loc.Uniform1i(0)
	panicGlError()

	worldMatrix := p.GetUniformLocation("MVP")
	worldMatrix.UniformMatrix4f(false, ptrForMatrix(d.mvp))
	panicGlError()
	return nil
}

func (self *OpenGLRenderer) renderOne(operation render.RenderOperation, renderState RenderState) {
	mesh := operation.Mesh
	material := operation.Material
	transform := operation.Transform

	// No attributes? no loaded or empty? Better way to handle this than spamming
	// the console?
	if mesh.VertexArrayObj == nil {
		log.Println("WARNING: Trying to render an invalid mesh", mesh)
		return
	}

	vertexArrayObj := mesh.VertexArrayObj.(gl.VertexArray)
	vertexArrayObj.Bind()

	material.Shader.Program.Use()
	material.Shader.Program.SetUniformMatrix(
		"modelViewProjection",
		renderState.ViewProjection.Times(transform),
	)

	if material.Texture != nil {
		glTexture := material.Texture.Id.(gl.Texture)
		gl.ActiveTexture(gl.TEXTURE0)

		if !material.IsCubeMap {
			glTexture.Bind(gl.TEXTURE_2D)
			defer glTexture.Unbind(gl.TEXTURE_2D)
			material.Shader.Program.SetUniformUnit("textureSampler", 0)
		} else {
			gl.Disable(gl.DEPTH_TEST)
			defer gl.Enable(gl.DEPTH_TEST)

			glTexture.Bind(gl.TEXTURE_CUBE_MAP)
			defer glTexture.Unbind(gl.TEXTURE_CUBE_MAP)
			material.Shader.Program.SetUniformUnit("cubeMap", 0)
		}
	}

	if len(mesh.IndexList) == 0 {
		gl.DrawArrays(gl.TRIANGLES, 0, len(mesh.VertexList)*3)
	} else {
		gl.DrawElements(gl.TRIANGLES, len(mesh.IndexList), gl.UNSIGNED_INT, nil)
	}
}

func (unif *UniformsLocInstanced) SetGl() {
	gl.ActiveTexture(gl.TEXTURE0)
	if err := CheckGlError(); err != nil {
		err.Description = "gl.ActiveTexture(gl.TEXTURE0)"
		panic(err)
	}

	globaltexture.Bind(gl.TEXTURE_CUBE_MAP)
	if err := CheckGlError(); err != nil {
		err.Description = "gl.Texture(1).Bind(gl.TEXTURE_CUBE_MAP)"
		panic(err)
	}

	unif.textureLoc.Uniform1i(0)
	if err := CheckGlError(); err != nil {
		err.Description = "unif.textureloc.Uniform1i(0)"
		panic(err)
	}
}

func (video *SDLVideo) initGL() {
	if gl.Init() != 0 {
		panic(sdl.GetError())
	}

	gl.ClearColor(0.0, 0.0, 0.0, 1.0)
	gl.Enable(gl.CULL_FACE)
	gl.Enable(gl.DEPTH_TEST)

	video.prog = createProgram(vertShaderSrcDef, fragShaderSrcDef)
	posAttrib := video.prog.GetAttribLocation("vPosition")
	texCoordAttr := video.prog.GetAttribLocation("vTexCoord")
	video.textureUni = video.prog.GetAttribLocation("texture")

	video.texture = gl.GenTexture()
	gl.ActiveTexture(gl.TEXTURE0)
	video.texture.Bind(gl.TEXTURE_2D)

	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST)

	video.prog.Use()
	posAttrib.EnableArray()
	texCoordAttr.EnableArray()

	vertVBO := gl.GenBuffer()
	vertVBO.Bind(gl.ARRAY_BUFFER)
	verts := []float32{-1.0, 1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, -1.0, 1.0}
	gl.BufferData(gl.ARRAY_BUFFER, len(verts)*int(unsafe.Sizeof(verts[0])), &verts[0], gl.STATIC_DRAW)

	textCoorBuf := gl.GenBuffer()
	textCoorBuf.Bind(gl.ARRAY_BUFFER)
	texVerts := []float32{0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 1.0, 0.0, 1.0, 1.0, 0.0, 1.0}
	gl.BufferData(gl.ARRAY_BUFFER, len(texVerts)*int(unsafe.Sizeof(texVerts[0])), &texVerts[0], gl.STATIC_DRAW)

	posAttrib.AttribPointer(2, gl.FLOAT, false, 0, uintptr(0))
	texCoordAttr.AttribPointer(2, gl.FLOAT, false, 0, uintptr(0))
}

func main() {
	if err := glfw.Init(); err != nil {
		fmt.Fprintf(os.Stderr, "%s\n", err.Error())
		return
	}

	defer glfw.Terminate()

	glfw.OpenWindowHint(glfw.FsaaSamples, 4)
	glfw.OpenWindowHint(glfw.OpenGLVersionMajor, 3)
	glfw.OpenWindowHint(glfw.OpenGLVersionMinor, 3)
	glfw.OpenWindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)

	if err := glfw.OpenWindow(1024, 768, 0, 0, 0, 0, 32, 0, glfw.Windowed); err != nil {
		fmt.Fprintf(os.Stderr, "%s\n", err.Error())
		return
	}

	glfw.SetSwapInterval(0)

	//gl.GlewExperimental(true)
	gl.Init()     // Can't find gl.GLEW_OK or any variation, not sure how to check if this worked
	gl.GetError() // ignore error, since we're telling it to use CoreProfile above, we get "invalid enumerant" (GLError 1280) which freaks the OpenGLSentinel out

	glfw.SetWindowTitle("Tutorial 07")

	glfw.Enable(glfw.StickyKeys)
	glfw.Disable(glfw.MouseCursor) // Not in the original tutorial, but IMO it SHOULD be there
	glfw.SetMousePos(1024.0/2.0, 768.0/2.0)

	gl.ClearColor(0., 0., 0.4, 0.)

	gl.Enable(gl.DEPTH_TEST)
	gl.DepthFunc(gl.LESS)

	gl.Enable(gl.CULL_FACE)

	camera := input.NewCamera()

	vertexArray := gl.GenVertexArray()
	defer vertexArray.Delete()
	vertexArray.Bind()

	prog := helper.MakeProgram("TransformVertexShader.vertexshader", "TextureFragmentShader.fragmentshader")
	defer prog.Delete()

	matrixID := prog.GetUniformLocation("MVP")

	texture := helper.MakeTextureFromTGA("uvmap.tga") // Had to convert to tga, go-gl is missing the texture method for DDS right now
	defer texture.Delete()
	texSampler := prog.GetUniformLocation("myTextureSampler")

	meshObj := objloader.LoadObject("cube.obj")
	vertices, uvs := meshObj.Vertices, meshObj.UVs

	vertexBuffer := gl.GenBuffer()
	defer vertexBuffer.Delete()
	vertexBuffer.Bind(gl.ARRAY_BUFFER)
	gl.BufferData(gl.ARRAY_BUFFER, len(vertices)*3*4, vertices, gl.STATIC_DRAW)

	uvBuffer := gl.GenBuffer()
	defer uvBuffer.Delete()
	uvBuffer.Bind(gl.ARRAY_BUFFER)
	// UV doesn't seem to care
	gl.BufferData(gl.ARRAY_BUFFER, len(uvs)*2*4, uvs, gl.STATIC_DRAW)

	// Equivalent to a do... while
	for ok := true; ok; ok = (glfw.Key(glfw.KeyEsc) != glfw.KeyPress && glfw.WindowParam(glfw.Opened) == gl.TRUE && glfw.Key('Q') != glfw.KeyPress) {
		func() {
			gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)

			prog.Use()
			defer gl.ProgramUnuse()

			view, proj := camera.ComputeViewPerspective()
			model := mathgl.Ident4f()

			MVP := proj.Mul4(view).Mul4(model)

			matrixID.UniformMatrix4fv(false, MVP)

			gl.ActiveTexture(gl.TEXTURE0)
			texture.Bind(gl.TEXTURE_2D)
			defer texture.Unbind(gl.TEXTURE_2D)
			texSampler.Uniform1i(0)

			vertexAttrib := gl.AttribLocation(0)
			vertexAttrib.EnableArray()
			defer vertexAttrib.DisableArray()
			vertexBuffer.Bind(gl.ARRAY_BUFFER)
			defer vertexBuffer.Unbind(gl.ARRAY_BUFFER)
			vertexAttrib.AttribPointer(3, gl.FLOAT, false, 0, nil)

			uvAttrib := gl.AttribLocation(1)
			uvAttrib.EnableArray()
			defer uvAttrib.DisableArray()
			uvBuffer.Bind(gl.ARRAY_BUFFER)
			defer uvBuffer.Unbind(gl.ARRAY_BUFFER)
			uvAttrib.AttribPointer(2, gl.FLOAT, false, 0, nil)

//.........这里部分代码省略.........

func LoadSkybox() {
	gl.ActiveTexture(gl.TEXTURE0)
	if err := CheckGlError(); err != nil {
		panic(err)
	}

	t := gl.GenTexture()
	if err := CheckGlError(); err != nil {
		panic(err)
	}

	t.Bind(gl.TEXTURE_CUBE_MAP)
	if err := CheckGlError(); err != nil {
		panic(err)
	}

	const filename = "Skybox_tut13_384x256.png"
	img, err := LoadImage(filename)
	if err != nil {
		panic(err)
	}

	size := img.Bounds().Size()
	w := size.X
	h := size.Y
	if w/3 != h/2 {
		panic("incorrect aspect ratio")
	}
	s := h / 2 // Size of one face of the cube.

	targets := [...]gl.GLenum{
		gl.TEXTURE_CUBE_MAP_NEGATIVE_X,
		gl.TEXTURE_CUBE_MAP_POSITIVE_X,
		gl.TEXTURE_CUBE_MAP_NEGATIVE_Y,
		gl.TEXTURE_CUBE_MAP_POSITIVE_Y,
		gl.TEXTURE_CUBE_MAP_NEGATIVE_Z,
		gl.TEXTURE_CUBE_MAP_POSITIVE_Z,
	}
	rs := []image.Rectangle{
		image.Rect(0*s, 0*s, 1*s, 1*s), // 0 side.
		image.Rect(1*s, 0*s, 2*s, 1*s), // 1 side.
		image.Rect(2*s, 0*s, 3*s, 1*s), // 2 side.
		image.Rect(0*s, 1*s, 1*s, 2*s), // 3 bottom.
		image.Rect(1*s, 1*s, 2*s, 2*s), // 4 top.
		image.Rect(2*s, 1*s, 3*s, 2*s), // 5 side.
	}
	// redirect must end with 3 and 4.  This places the floor at -z and the
	// sky at +z.
	// All the sides look properly oriented (grass down) on the +y side.
	// Considering that the sky is properly oriented the way it is, then
	// rectangle 5 contains the picture that matches it on the +y side.
	// Therefore, redirect must end with 5, 3, 4.
	// Problem now: all the other sides, and maybe the floor too, need to be
	// rotated in order to line up, that is having their sky on top.
	redirect := [...]int{0, 2, 1, 5, 3, 4}

	ID := matrix23{1, 0, 0, 1, 0, 0}
	ms := [...]matrix23{
		matrix23{0, -1, 1, 0, 0, s - 1},
		matrix23{0, 1, -1, 0, s - 1, 0},
		matrix23{-1, 0, 0, -1, s - 1, s - 1},
		ID,
		matrix23{-1, 0, 0, -1, s - 1, s - 1},
		ID,
	}

	rgba := forceRGBA(img)
	for i, target := range targets {
		subimage := rgba.SubImage(rs[redirect[i]])
		data := GlRgba(subimage, ms[i])
		gl.TexImage2D(
			target,
			0,                // Mipmap level.
			gl.SRGB8_ALPHA8,  // Format inside OpenGL.
			s,                // Width.
			s,                // Height.
			0,                // Border.  Doc says it must be 0.
			gl.RGBA,          // Format of the data that...
			gl.UNSIGNED_BYTE, // ... I give to OpenGL.
			data,             // And the data itself.
		)
		if err := CheckGlError(); err != nil {
			panic(err)
		}
	}

	const target = gl.TEXTURE_CUBE_MAP
	gl.GenerateMipmap(target)
	if err := CheckGlError(); err != nil {
		panic(err)
	}

	gl.TexParameteri(target, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR)
	if err := CheckGlError(); err != nil {
		panic(err)
	}
	gl.TexParameteri(target, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
	if err := CheckGlError(); err != nil {
		panic(err)
	}
//.........这里部分代码省略.........

func LoadTexture() {
	gl.ActiveTexture(gl.TEXTURE0)
	if err := CheckGlError(); err != nil {
		panic(err)
	}

	t := gl.GenTexture()
	if err := CheckGlError(); err != nil {
		panic(err)
	}

	const target = gl.TEXTURE_2D

	t.Bind(target)
	if err := CheckGlError(); err != nil {
		panic(err)
	}

	img, err := LoadImage("test.jpg")
	if err != nil {
		panic(err)
	}

	data := GlRgba(img, matrix23{1, 0, 0, 1, 0, 0})
	size := img.Bounds().Size()

	gl.TexImage2D(
		target,
		0,                // Mipmap level.
		gl.SRGB8_ALPHA8,  // Format inside OpenGL.
		size.X,           // Width.
		size.Y,           // Height.
		0,                // Border.  Doc says it must be 0.
		gl.RGBA,          // Format of the data that...
		gl.UNSIGNED_BYTE, // ... I give to OpenGL.
		data,             // And the data itself.
	)
	if err := CheckGlError(); err != nil {
		panic(err)
	}

	gl.GenerateMipmap(target)
	if err := CheckGlError(); err != nil {
		panic(err)
	}

	gl.TexParameteri(target, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR)
	if err := CheckGlError(); err != nil {
		panic(err)
	}
	gl.TexParameteri(target, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
	if err := CheckGlError(); err != nil {
		panic(err)
	}
	gl.TexParameteri(target, gl.TEXTURE_WRAP_R, gl.CLAMP_TO_EDGE)
	if err := CheckGlError(); err != nil {
		panic(err)
	}
	gl.TexParameteri(target, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE)
	if err := CheckGlError(); err != nil {
		panic(err)
	}

	t.Unbind(target)

	globaltexture = t
}

func handleElement(camera *PerspectiveCamera, element SceneObject) {
	// Material
	material := element.Material()
	program := material.Program()
	if program == nil {
		program = createProgram(element)
		material.SetProgram(program)
	}
	program.Use()
	defer program.Unuse()

	view := camera.Transform.modelMatrix().Inv()
	model := element.Transform().modelMatrix()
	projection := camera.projectionMatrix
	MVP := projection.Mul4(view).Mul4(model)

	// Set model view projection matrix
	program.uniforms["MVP"].apply(MVP)
	program.uniforms["M"].apply(model)
	program.uniforms["V"].apply(view)

	// Light position
	lightPos := mgl32.Vec3{4., 4., 4.}
	program.uniforms["LightPosition_worldspace"].apply(lightPos)

	if c, ok := material.(Colored); ok {
		if c.Color() != nil {
			program.uniforms["diffuse"].apply(c.Color())
		}
	}

	if t, ok := material.(Textured); ok {
		texture := t.Texture()
		if texture != nil {
			gl.ActiveTexture(gl.TEXTURE0)
			texture.Bind()
			defer texture.Unbind()
			program.uniforms["texture"].apply(texture)
			program.uniforms["repeat"].apply(texture.Repeat)
		}
	}

	for _, attribute := range program.attributes {
		attribute.enable()
		defer attribute.disable()
		attribute.bindBuffer()
		defer attribute.unbindBuffer()
		attribute.pointer()
		attribute.bindBuffer()
	}

	vertexAttrib := gl.AttribLocation(0)
	vertexAttrib.EnableArray()
	defer vertexAttrib.DisableArray()
	element.VertexBuffer().Bind(gl.ARRAY_BUFFER)
	defer element.VertexBuffer().Unbind(gl.ARRAY_BUFFER)
	vertexAttrib.AttribPointer(3, gl.FLOAT, false, 0, nil)

	if t, ok := material.(Wireframed); ok {
		if t.Wireframe() {
			gl.PolygonMode(gl.FRONT_AND_BACK, gl.LINE)
		} else {
			gl.PolygonMode(gl.FRONT_AND_BACK, gl.FILL)
		}
	}

	// If index available
	index := element.Index()
	if index != nil && index.count > 0 {
		index.enable()
		defer index.disable()

		gl.DrawElements(gl.TRIANGLES, index.count, gl.UNSIGNED_SHORT, nil)
	} else {
		gl.DrawArrays(element.Mode(), 0, element.Geometry().ArrayCount())
	}
}

func main() {
	runtime.LockOSThread()

	if !glfw.Init() {
		fmt.Fprintf(os.Stderr, "Can't open GLFW")
		return
	}
	defer glfw.Terminate()

	glfw.WindowHint(glfw.Samples, 4)
	glfw.WindowHint(glfw.ContextVersionMajor, 3)
	glfw.WindowHint(glfw.ContextVersionMinor, 3)
	glfw.WindowHint(glfw.OpenglProfile, glfw.OpenglCoreProfile)
	glfw.WindowHint(glfw.OpenglForwardCompatible, glfw.True) // needed for macs

	window, err := glfw.CreateWindow(1024, 768, "Tutorial 7", nil, nil)
	if err != nil {
		fmt.Fprintf(os.Stderr, "%v\n", err)
		return
	}

	window.MakeContextCurrent()

	gl.Init()
	gl.GetError() // Ignore error
	window.SetInputMode(glfw.StickyKeys, 1)
	window.SetCursorPosition(1024/2, 768/2)
	window.SetInputMode(glfw.Cursor, glfw.CursorHidden)

	gl.ClearColor(0., 0., 0.4, 0.)

	gl.Enable(gl.DEPTH_TEST)
	gl.DepthFunc(gl.LESS)

	gl.Enable(gl.CULL_FACE)

	camera := input.NewCamera(window)

	vertexArray := gl.GenVertexArray()
	defer vertexArray.Delete()
	vertexArray.Bind()

	prog := helper.MakeProgram("TransformVertexShader.vertexshader", "TextureFragmentShader.fragmentshader")
	defer prog.Delete()

	matrixID := prog.GetUniformLocation("MVP")

	texture, err := helper.TextureFromDDS("uvmap.DDS")
	if err != nil {
		fmt.Println("Couldn't load texture")
		return
	}
	defer texture.Delete()
	texSampler := prog.GetUniformLocation("myTextureSampler")

	meshObj := objloader.LoadObject("cube.obj", true)
	vertices, uvs := meshObj.Vertices, meshObj.UVs

	vertexBuffer := gl.GenBuffer()
	defer vertexBuffer.Delete()
	vertexBuffer.Bind(gl.ARRAY_BUFFER)
	gl.BufferData(gl.ARRAY_BUFFER, len(vertices)*3*4, vertices, gl.STATIC_DRAW)

	uvBuffer := gl.GenBuffer()
	defer uvBuffer.Delete()
	uvBuffer.Bind(gl.ARRAY_BUFFER)

	// UV doesn't seem to care
	gl.BufferData(gl.ARRAY_BUFFER, len(uvs)*2*4, uvs, gl.STATIC_DRAW)

	// Equivalent to a do... while
	for ok := true; ok; ok = (window.GetKey(glfw.KeyEscape) != glfw.Press && !window.ShouldClose()) {
		func() {
			gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)

			prog.Use()
			defer gl.ProgramUnuse()

			view, proj := camera.ComputeViewPerspective()
			model := mgl32.Ident4()

			MVP := proj.Mul4(view).Mul4(model)

			matrixID.UniformMatrix4fv(false, MVP)

			gl.ActiveTexture(gl.TEXTURE0)
			texture.Bind(gl.TEXTURE_2D)
			defer texture.Unbind(gl.TEXTURE_2D)
			texSampler.Uniform1i(0)

			vertexAttrib := gl.AttribLocation(0)
			vertexAttrib.EnableArray()
			defer vertexAttrib.DisableArray()
			vertexBuffer.Bind(gl.ARRAY_BUFFER)
			defer vertexBuffer.Unbind(gl.ARRAY_BUFFER)
			vertexAttrib.AttribPointer(3, gl.FLOAT, false, 0, nil)

			uvAttrib := gl.AttribLocation(1)
			uvAttrib.EnableArray()
			defer uvAttrib.DisableArray()
//.........这里部分代码省略.........

//.........这里部分代码省略.........
					}
				case sdl.K_F5:
					if e.Type == sdl.KEYDOWN {
						event = &LoadStateEvent{}
					}
				case sdl.K_F8:
					if e.Type == sdl.KEYDOWN {
						event = &FPSEvent{2.}
					}
				case sdl.K_F9:
					if e.Type == sdl.KEYDOWN {
						event = &FPSEvent{1.}
					}
				case sdl.K_F10:
					if e.Type == sdl.KEYDOWN {
						event = &FPSEvent{.75}
					}
				case sdl.K_F11:
					if e.Type == sdl.KEYDOWN {
						event = &FPSEvent{.5}
					}
				case sdl.K_F12:
					if e.Type == sdl.KEYDOWN {
						event = &FPSEvent{.25}
					}
				case sdl.K_KP0:
					if e.Type == sdl.KEYDOWN {
						event = &MuteEvent{}
					}
				case sdl.K_KP1:
					if e.Type == sdl.KEYDOWN {
						event = &MutePulse1Event{}
					}
				case sdl.K_KP2:
					if e.Type == sdl.KEYDOWN {
						event = &MutePulse2Event{}
					}
				case sdl.K_KP3:
					if e.Type == sdl.KEYDOWN {
						event = &MuteTriangleEvent{}
					}
				case sdl.K_KP4:
					if e.Type == sdl.KEYDOWN {
						event = &MuteNoiseEvent{}
					}
				case sdl.K_KP5:
					if e.Type == sdl.KEYDOWN {
						event = &MuteDMCEvent{}
					}
				}

				if event == nil && running {
					event = &ControllerEvent{
						Button: button(e),
						Down:   e.Type == sdl.KEYDOWN,
					}
				}
			}

			if event != nil {
				go func() { video.events <- event }()
			}
		case colors := <-video.input:
			index := 0
			x, y := 0, 0

			for _, c := range colors {
				if pixelInFrame(x, y, video.overscan) {
					frame[index] = video.palette[c]
					index++
				}

				switch x {
				case 255:
					x = 0
					y++
				default:
					x++
				}
			}
			video.framePool.Put(colors)

			gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)

			video.prog.Use()

			gl.ActiveTexture(gl.TEXTURE0)
			video.texture.Bind(gl.TEXTURE_2D)

			gl.TexImage2D(gl.TEXTURE_2D, 0, 3, video.frameWidth(), video.frameHeight(), 0, gl.RGBA,
				gl.UNSIGNED_INT_8_8_8_8, frame)

			gl.DrawArrays(gl.TRIANGLES, 0, 6)

			if video.screen != nil {
				sdl.GL_SwapBuffers()
			}
		}
	}
}