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) gl.DrawArrays(gl.TRIANGLES, 0, len(vertices)) glfw.SwapBuffers() }() // Defers unbinds and disables to here, end of the loop } }
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 09") 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("StandardShading.vertexshader", "StandardShading.fragmentshader") defer prog.Delete() matrixID := prog.GetUniformLocation("MVP") viewMatrixID := prog.GetUniformLocation("V") modelMatrixID := prog.GetUniformLocation("M") 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("suzanne.obj") indices, indexedVertices, indexedUVs, indexedNormals := indexer.IndexVBO(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.Time() nbFrames := 0 // 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) { currTime := glfw.Time() 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 := mathgl.Ident4f() 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) glfw.SwapBuffers() }() // Defers unbinds and disables to here, end of the loop } }