func main() { var winTitle string = "Go-SDL2 + Go-GL" var winWidth, winHeight int = 800, 600 var window *sdl.Window var context sdl.GLContext var event sdl.Event var running bool if 0 != sdl.Init(sdl.INIT_EVERYTHING) { panic(sdl.GetError()) } window = sdl.CreateWindow(winTitle, sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED, winWidth, winHeight, sdl.WINDOW_OPENGL) if window == nil { panic(sdl.GetError()) } context = sdl.GL_CreateContext(window) if context == nil { panic(sdl.GetError()) } gl.Enable(gl.DEPTH_TEST) gl.ClearColor(0.2, 0.2, 0.3, 1.0) gl.ClearDepth(1) gl.DepthFunc(gl.LEQUAL) gl.Viewport(0, 0, int32(winWidth), int32(winHeight)) running = true for running { for event = sdl.PollEvent(); event != nil; event = sdl.PollEvent() { switch t := event.(type) { case *sdl.QuitEvent: running = false case *sdl.MouseMotionEvent: fmt.Printf("[%d ms] MouseMotion\tid:%d\tx:%d\ty:%d\txrel:%d\tyrel:%d\n", t.Timestamp, t.Which, t.X, t.Y, t.XRel, t.YRel) } } drawgl() sdl.GL_SwapWindow(window) } sdl.GL_DeleteContext(context) window.Destroy() sdl.Quit() }
func main() { var window *sdl.Window var context sdl.GLContext var event sdl.Event var running bool runtime.LockOSThread() if 0 != sdl.Init(sdl.INIT_EVERYTHING) { panic(sdl.GetError()) } window = sdl.CreateWindow(winTitle, sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED, winWidth, winHeight, sdl.WINDOW_OPENGL) if window == nil { panic(sdl.GetError()) } context = sdl.GL_CreateContext(window) if context == nil { panic(sdl.GetError()) } gl.Init() gl.Viewport(0, 0, gl.Sizei(winWidth), gl.Sizei(winHeight)) // OPENGL FLAGS gl.ClearColor(0.0, 0.1, 0.0, 1.0) gl.Enable(gl.DEPTH_TEST) gl.DepthFunc(gl.LESS) gl.Enable(gl.BLEND) gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA) // VERTEX BUFFER var vertexbuffer gl.Uint gl.GenBuffers(1, &vertexbuffer) gl.BindBuffer(gl.ARRAY_BUFFER, vertexbuffer) gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(len(triangle_vertices)*4), gl.Pointer(&triangle_vertices[0]), gl.STATIC_DRAW) // COLOUR BUFFER var colourbuffer gl.Uint gl.GenBuffers(1, &colourbuffer) gl.BindBuffer(gl.ARRAY_BUFFER, colourbuffer) gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(len(triangle_colours)*4), gl.Pointer(&triangle_colours[0]), gl.STATIC_DRAW) // GUESS WHAT program := createprogram() // VERTEX ARRAY var VertexArrayID gl.Uint gl.GenVertexArrays(1, &VertexArrayID) gl.BindVertexArray(VertexArrayID) gl.EnableVertexAttribArray(0) gl.BindBuffer(gl.ARRAY_BUFFER, vertexbuffer) gl.VertexAttribPointer(0, 3, gl.FLOAT, gl.FALSE, 0, nil) // VERTEX ARRAY HOOK COLOURS gl.EnableVertexAttribArray(1) gl.BindBuffer(gl.ARRAY_BUFFER, colourbuffer) gl.VertexAttribPointer(1, 3, gl.FLOAT, gl.FALSE, 0, nil) //UNIFORM HOOK unistring := gl.GLString("scaleMove") UniScale = gl.GetUniformLocation(program, unistring) fmt.Printf("Uniform Link: %v\n", UniScale+1) gl.UseProgram(program) running = true for running { for event = sdl.PollEvent(); event != nil; event = sdl.PollEvent() { switch t := event.(type) { case *sdl.QuitEvent: running = false case *sdl.MouseMotionEvent: xrot = float32(t.Y) / 2 yrot = float32(t.X) / 2 fmt.Printf("[%dms]MouseMotion\tid:%d\tx:%d\ty:%d\txrel:%d\tyrel:%d\n", t.Timestamp, t.Which, t.X, t.Y, t.XRel, t.YRel) } } drawgl() sdl.GL_SwapWindow(window) } sdl.GL_DeleteContext(context) window.Destroy() sdl.Quit() }