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 6", 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("uvtemplate.DDS") if err != nil { fmt.Printf("Couldn't make texture: %v\n", err) return } defer texture.Delete() texSampler := prog.GetUniformLocation("myTextureSampler") vBufferData := [...]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, -1.0, -1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, -1.0, -1.0, -1.0, -1.0, -1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, -1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, 1.0, } uvBufferData := [...]float32{ 0.000059, 1.0 - 0.000004, 0.000103, 1.0 - 0.336048, 0.335973, 1.0 - 0.335903, 1.000023, 1.0 - 0.000013, 0.667979, 1.0 - 0.335851, 0.999958, 1.0 - 0.336064, 0.667979, 1.0 - 0.335851, 0.336024, 1.0 - 0.671877, 0.667969, 1.0 - 0.671889, 1.000023, 1.0 - 0.000013, 0.668104, 1.0 - 0.000013, 0.667979, 1.0 - 0.335851, 0.000059, 1.0 - 0.000004, 0.335973, 1.0 - 0.335903, 0.336098, 1.0 - 0.000071, 0.667979, 1.0 - 0.335851, 0.335973, 1.0 - 0.335903, 0.336024, 1.0 - 0.671877, 1.000004, 1.0 - 0.671847, 0.999958, 1.0 - 0.336064, 0.667979, 1.0 - 0.335851, 0.668104, 1.0 - 0.000013, 0.335973, 1.0 - 0.335903, 0.667979, 1.0 - 0.335851, 0.335973, 1.0 - 0.335903, 0.668104, 1.0 - 0.000013, 0.336098, 1.0 - 0.000071, 0.000103, 1.0 - 0.336048, 0.000004, 1.0 - 0.671870, 0.336024, 1.0 - 0.671877, 0.000103, 1.0 - 0.336048, 0.336024, 1.0 - 0.671877, 0.335973, 1.0 - 0.335903, 0.667969, 1.0 - 0.671889, 1.000004, 1.0 - 0.671847, 0.667979, 1.0 - 0.335851, } // Invert V because we're using a compressed texture for i := 1; i < len(uvBufferData); i += 2 { uvBufferData[i] = 1.0 - uvBufferData[i] } vertexBuffer := gl.GenBuffer() defer vertexBuffer.Delete() vertexBuffer.Bind(gl.ARRAY_BUFFER) gl.BufferData(gl.ARRAY_BUFFER, len(vBufferData)*4, &vBufferData, gl.STATIC_DRAW) uvBuffer := gl.GenBuffer() defer uvBuffer.Delete() uvBuffer.Bind(gl.ARRAY_BUFFER) gl.BufferData(gl.ARRAY_BUFFER, len(uvBufferData)*4, &uvBufferData, 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) //mvpArray := mvp.AsCMOArray(mathgl.FLOAT32).([16]float32) 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) gl.DrawArrays(gl.TRIANGLES, 0, 12*3) window.SwapBuffers() glfw.PollEvents() }() // Defers unbinds and disables to here, end of the loop } }
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() uvBuffer.Bind(gl.ARRAY_BUFFER) defer uvBuffer.Unbind(gl.ARRAY_BUFFER) uvAttrib.AttribPointer(2, gl.FLOAT, false, 0, nil) gl.DrawArrays(gl.TRIANGLES, 0, len(vertices)) window.SwapBuffers() glfw.PollEvents() }() // Defers unbinds and disables to here, end of the loop } }
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 2", 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) gl.ClearColor(0., 0., 0.4, 0.) vBufferData := [...]float32{ -1., -1., 0., 1., -1., 0., 0., 1., 0.} vertexArray := gl.GenVertexArray() vertexArray.Bind() prog := helper.MakeProgram("SimpleVertexShader.vertexshader", "SimpleFragmentShader.fragmentshader") buffer := gl.GenBuffer() buffer.Bind(gl.ARRAY_BUFFER) gl.BufferData(gl.ARRAY_BUFFER, len(vBufferData)*4, &vBufferData[0], gl.STATIC_DRAW) // Equivalent to a do... while for ok := true; ok; ok = (window.GetKey(glfw.KeyEscape) != glfw.Press && !window.ShouldClose()) { gl.Clear(gl.COLOR_BUFFER_BIT) prog.Use() attribLoc := gl.AttribLocation(0) attribLoc.EnableArray() buffer.Bind(gl.ARRAY_BUFFER) attribLoc.AttribPointer(3, gl.FLOAT, false, 0, nil) gl.DrawArrays(gl.TRIANGLES, 0, 3) attribLoc.DisableArray() window.SwapBuffers() glfw.PollEvents() } }
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 3", 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) gl.ClearColor(0., 0., 0.4, 0.) vertexArray := gl.GenVertexArray() defer vertexArray.Delete() vertexArray.Bind() prog := helper.MakeProgram("SimpleTransform.vertexshader", "SingleColor.fragmentshader") defer prog.Delete() matrixID := prog.GetUniformLocation("MVP") Projection := mgl32.Perspective(45.0, 4.0/3.0, 0.1, 100.0) //Projection := mathgl.Identity(4,mathgl.FLOAT64) //Projection := mathgl.Ortho2D(-5,5,-5,5) View := mgl32.LookAt(4.0, 3.0, 3.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0) //View := mathgl.Identity(4,mathgl.FLOAT64) Model := mgl32.Ident4() //Model := mathgl.Scale3D(2.,2.,2.).Mul(mathgl.HomogRotate3DX(25.0)).Mul(mathgl.Translate3D(.5,.2,-.7)) MVP := Projection.Mul4(View).Mul4(Model) // Remember, transform multiplication order is "backwards" vBufferData := [...]float32{ -1., -1., 0., 1., -1., 0., 0., 1., 0.} //elBufferData := [...]uint8{0, 1, 2} // Not sure why this is here buffer := gl.GenBuffer() defer buffer.Delete() buffer.Bind(gl.ARRAY_BUFFER) gl.BufferData(gl.ARRAY_BUFFER, len(vBufferData)*4, &vBufferData, gl.STATIC_DRAW) // Equivalent to a do... while for ok := true; ok; ok = (window.GetKey(glfw.KeyEscape) != glfw.Press && !window.ShouldClose()) { gl.Clear(gl.COLOR_BUFFER_BIT) prog.Use() matrixID.UniformMatrix4fv(false, MVP) attribLoc := gl.AttribLocation(0) attribLoc.EnableArray() buffer.Bind(gl.ARRAY_BUFFER) attribLoc.AttribPointer(3, gl.FLOAT, false, 0, nil) gl.DrawArrays(gl.TRIANGLES, 0, 3) attribLoc.DisableArray() window.SwapBuffers() glfw.PollEvents() } }
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 4", 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) gl.ClearColor(0., 0., 0.4, 0.) gl.Enable(gl.DEPTH_TEST) gl.DepthFunc(gl.LESS) vertexArray := gl.GenVertexArray() defer vertexArray.Delete() vertexArray.Bind() prog := helper.MakeProgram("TransformVertexShader.vertexshader", "ColorFragmentShader.fragmentshader") defer prog.Delete() matrixID := prog.GetUniformLocation("MVP") Projection := mgl32.Perspective(45.0, 4.0/3.0, 0.1, 100.0) View := mgl32.LookAt(4.0, 3.0, -3.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0) Model := mgl32.Ident4() MVP := Projection.Mul4(View).Mul4(Model) // Remember, transform multiplication order is "backwards" vBufferData := [...]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, -1.0, -1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, -1.0, -1.0, -1.0, -1.0, -1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, -1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, 1.0} colorBufferData := [...]float32{ 0.583, 0.771, 0.014, 0.609, 0.115, 0.436, 0.327, 0.483, 0.844, 0.822, 0.569, 0.201, 0.435, 0.602, 0.223, 0.310, 0.747, 0.185, 0.597, 0.770, 0.761, 0.559, 0.436, 0.730, 0.359, 0.583, 0.152, 0.483, 0.596, 0.789, 0.559, 0.861, 0.639, 0.195, 0.548, 0.859, 0.014, 0.184, 0.576, 0.771, 0.328, 0.970, 0.406, 0.615, 0.116, 0.676, 0.977, 0.133, 0.971, 0.572, 0.833, 0.140, 0.616, 0.489, 0.997, 0.513, 0.064, 0.945, 0.719, 0.592, 0.543, 0.021, 0.978, 0.279, 0.317, 0.505, 0.167, 0.620, 0.077, 0.347, 0.857, 0.137, 0.055, 0.953, 0.042, 0.714, 0.505, 0.345, 0.783, 0.290, 0.734, 0.722, 0.645, 0.174, 0.302, 0.455, 0.848, 0.225, 0.587, 0.040, 0.517, 0.713, 0.338, 0.053, 0.959, 0.120, 0.393, 0.621, 0.362, 0.673, 0.211, 0.457, 0.820, 0.883, 0.371, 0.982, 0.099, 0.879} //elBufferData := [...]uint8{0, 1, 2} // Not sure why this is here vertexBuffer := gl.GenBuffer() defer vertexBuffer.Delete() vertexBuffer.Bind(gl.ARRAY_BUFFER) gl.BufferData(gl.ARRAY_BUFFER, len(vBufferData)*4, &vBufferData, gl.STATIC_DRAW) colorBuffer := gl.GenBuffer() defer colorBuffer.Delete() colorBuffer.Bind(gl.ARRAY_BUFFER) gl.BufferData(gl.ARRAY_BUFFER, len(colorBufferData)*4, &colorBufferData, gl.STATIC_DRAW) // Equivalent to a do... while for ok := true; ok; ok = (window.GetKey(glfw.KeyEscape) != glfw.Press && !window.ShouldClose()) { gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT) prog.Use() matrixID.UniformMatrix4fv(false, MVP) vertexAttrib := gl.AttribLocation(0) vertexAttrib.EnableArray() vertexBuffer.Bind(gl.ARRAY_BUFFER) vertexAttrib.AttribPointer(3, gl.FLOAT, false, 0, nil) colorAttrib := gl.AttribLocation(1) colorAttrib.EnableArray() colorBuffer.Bind(gl.ARRAY_BUFFER) colorAttrib.AttribPointer(3, gl.FLOAT, false, 0, nil) gl.DrawArrays(gl.TRIANGLES, 0, 12*3) vertexAttrib.DisableArray() colorAttrib.DisableArray() window.SwapBuffers() glfw.PollEvents() } }
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 8", 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("StandardShading.vertexshader", "StandardShading.fragmentshader") defer prog.Delete() matrixID := prog.GetUniformLocation("MVP") viewMatrixID := prog.GetUniformLocation("V") modelMatrixID := prog.GetUniformLocation("M") texture, err := helper.TextureFromDDS("uvmap.DDS") if err != nil { fmt.Printf("Could not load texture: %v\n", err) } defer texture.Delete() texSampler := prog.GetUniformLocation("myTextureSampler") meshObj := objloader.LoadObject("suzanne.obj", true) indices, indexedVertices, indexedUVs, indexedNormals := indexer.IndexVBOSlow(meshObj.Vertices, meshObj.UVs, meshObj.Normals) vertexBuffer := gl.GenBuffer() defer vertexBuffer.Delete() vertexBuffer.Bind(gl.ARRAY_BUFFER) gl.BufferData(gl.ARRAY_BUFFER, len(indexedVertices)*3*4, indexedVertices, gl.STATIC_DRAW) uvBuffer := gl.GenBuffer() defer uvBuffer.Delete() uvBuffer.Bind(gl.ARRAY_BUFFER) // And yet, the weird length stuff doesn't seem to matter for UV or normal gl.BufferData(gl.ARRAY_BUFFER, len(indexedUVs)*2*4, indexedUVs, gl.STATIC_DRAW) normBuffer := gl.GenBuffer() defer normBuffer.Delete() normBuffer.Bind(gl.ARRAY_BUFFER) gl.BufferData(gl.ARRAY_BUFFER, len(indexedNormals)*3*4, indexedNormals, gl.STATIC_DRAW) elementBuffer := gl.GenBuffer() defer elementBuffer.Delete() elementBuffer.Bind(gl.ELEMENT_ARRAY_BUFFER) gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, len(indices)*2, indices, gl.STATIC_DRAW) // NOTE: a GL_UNSIGNED_SHORT is 16-bits lightID := prog.GetUniformLocation("LightPosition_worldspace") lastTime := glfw.GetTime() nbFrames := 0 // Equivalent to a do... while for ok := true; ok; ok = (window.GetKey(glfw.KeyEscape) != glfw.Press && !window.ShouldClose()) { currTime := glfw.GetTime() nbFrames++ if currTime-lastTime >= 1.0 { fmt.Printf("%f ms/frame\n", 1000.0/float64(nbFrames)) nbFrames = 0 lastTime += 1.0 } 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) //mvpArray := mvp.AsCMOArray(mathgl.FLOAT32).([16]float32) //vArray := view.AsCMOArray(mathgl.FLOAT32).([16]float32) //mArray := model.AsCMOArray(mathgl.FLOAT32).([16]float32) matrixID.UniformMatrix4fv(false, MVP) viewMatrixID.UniformMatrix4fv(false, view) modelMatrixID.UniformMatrix4fv(false, model) lightID.Uniform3f(4., 4., 4.) 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) normAttrib := gl.AttribLocation(2) normAttrib.EnableArray() defer normAttrib.DisableArray() normBuffer.Bind(gl.ARRAY_BUFFER) defer normBuffer.Unbind(gl.ARRAY_BUFFER) normAttrib.AttribPointer(3, gl.FLOAT, false, 0, nil) elementBuffer.Bind(gl.ELEMENT_ARRAY_BUFFER) defer elementBuffer.Unbind(gl.ELEMENT_ARRAY_BUFFER) gl.DrawElements(gl.TRIANGLES, len(indices), gl.UNSIGNED_SHORT, nil) window.SwapBuffers() glfw.PollEvents() }() // Defers unbinds and disables to here, end of the loop } }