// GetShaderInfoLog returns the information log for a shader.
//
// http://www.khronos.org/opengles/sdk/docs/man3/html/glGetShaderInfoLog.xhtml
func GetShaderInfoLog(s Shader) string {
var logLength int32
gl.GetShaderiv(s.Value, gl.INFO_LOG_LENGTH, &logLength)
if logLength == 0 {
return ""
}
logBuffer := make([]uint8, logLength)
gl.GetShaderInfoLog(s.Value, logLength, nil, &logBuffer[0])
return gl.GoStr(&logBuffer[0])
}
// GetProgramInfoLog returns the information log for a program.
//
// http://www.khronos.org/opengles/sdk/docs/man3/html/glGetProgramInfoLog.xhtml
func GetProgramInfoLog(p Program) string {
var logLength int32
gl.GetProgramiv(p.Value, gl.INFO_LOG_LENGTH, &logLength)
if logLength == 0 {
return ""
}
logBuffer := make([]uint8, logLength)
gl.GetProgramInfoLog(p.Value, logLength, nil, &logBuffer[0])
return gl.GoStr(&logBuffer[0])
}
// GetString reports current GL state.
//
// Valid name values:
// EXTENSIONS
// RENDERER
// SHADING_LANGUAGE_VERSION
// VENDOR
// VERSION
//
// http://www.khronos.org/opengles/sdk/docs/man3/html/glGetString.xhtml
func GetString(pname Enum) string {
return gl.GoStr(gl.GetString(uint32(pname)))
}
func main() {
fmt.Printf(`WolfenGo v%s, Copyright (C) 2016 gdm85
https://github.com/gdm85/wolfengo
WolfenGo comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to redistribute it
under GNU/GPLv2 license.`+"\n", version)
if err := glfw.Init(); err != nil {
fatalError(err)
}
defer glfw.Terminate()
// create a context and activate it
glfw.WindowHint(glfw.ContextVersionMajor, 2)
glfw.WindowHint(glfw.ContextVersionMinor, 1)
glfw.WindowHint(glfw.Resizable, glfw.False)
glfw.WindowHint(glfw.DoubleBuffer, glfw.True)
var err error
Window, err = glfw.CreateWindow(800, 600, "WolfenGo", nil, nil)
if err != nil {
fatalError(err)
}
Window.MakeContextCurrent()
// gl.Init() should be called after context is current
if err := gl.Init(); err != nil {
fatalError(err)
}
glfw.SwapInterval(1) // enable vertical refresh
fmt.Println(gl.GoStr(gl.GetString(gl.VERSION)))
if debugGL {
gl.DebugMessageCallback(debugCb, unsafe.Pointer(nil))
gl.Enable(gl.DEBUG_OUTPUT)
}
// init graphics
gl.ClearColor(0.0, 0.0, 0.0, 0.0)
gl.FrontFace(gl.CW)
gl.CullFace(gl.BACK)
gl.Enable(gl.CULL_FACE)
gl.Enable(gl.DEPTH_TEST)
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.Enable(gl.DEPTH_CLAMP)
gl.Enable(gl.TEXTURE_2D)
isRunning := false
// load all assets
_, err = getBasicShader()
if err != nil {
fatalError(err)
}
err = _defaultMedkit.initMedkit()
if err != nil {
fatalError(err)
}
err = _defaultMonster.initMonster()
if err != nil {
fatalError(err)
}
getDoorMesh()
initPlayer()
err = initGun()
if err != nil {
fatalError(err)
}
G, err = NewGame()
if err != nil {
fatalError(err)
}
// GAME STARTS
isRunning = true
var frames uint64
var frameCounter time.Duration
frameTime := time.Duration(1000/frameCap) * time.Millisecond
lastTime := time.Now()
var unprocessedTime time.Duration
for isRunning {
var render bool
startTime := time.Now()
passedTime := startTime.Sub(lastTime)
lastTime = startTime
unprocessedTime += passedTime
frameCounter += passedTime
for unprocessedTime > frameTime {
render = true
unprocessedTime -= frameTime
if Window.ShouldClose() {
isRunning = false
}
G.timeDelta = frameTime.Seconds()
glfw.PollEvents()
err := G.input()
if err != nil {
fatalError(err)
}
err = G.update()
if err != nil {
fatalError(err)
}
if frameCounter >= time.Second {
if printFPS {
fmt.Printf("%d FPS\n", frames)
}
frames = 0
frameCounter -= time.Second
}
}
if render {
//TODO: Stencil Buffer
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
G.render()
frames++
Window.SwapBuffers()
} else {
time.Sleep(time.Millisecond)
}
}
Window.Destroy()
}
// GoStr takes a null-terminated string returned by OpenGL and constructs a
// corresponding Go string.
func (c *Context) GoStr(cstr *uint8) string {
return gl.GoStr(cstr)
}
func (w *Window) Show() {
if err := glfw.Init(); err != nil {
log.Fatalln("failed to initialize glfw:", err)
}
defer glfw.Terminate()
glfw.WindowHint(glfw.Resizable, glfw.False)
glfw.WindowHint(glfw.Resizable, glfw.True)
window, err := glfw.CreateWindow(w.W, w.H, w.Title, nil, nil)
if err != nil {
panic(err)
}
if err := gl.Init(); err != nil {
panic(err)
}
window.MakeContextCurrent()
if len(w.Icon) == 1 {
window.SetIcon(w.Icon)
}
if w.RestrictionsEnabled {
window.SetSizeLimits(w.MinW, w.MinH, w.MaxW, w.MaxH)
}
if w.Blend {
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
} else if w.Smooth {
gl.Enable(gl.SMOOTH)
gl.Enable(gl.POINT_SMOOTH)
gl.Enable(gl.LINE_SMOOTH)
gl.Enable(gl.POLYGON_SMOOTH)
gl.Enable(gl.RELATIVE_SMOOTH_CUBIC_CURVE_TO_NV)
gl.Enable(gl.RELATIVE_SMOOTH_QUADRATIC_CURVE_TO_NV)
} else if w.Multisample {
gl.Enable(gl.MULTISAMPLE)
}
reshape(w.W, w.H)
window.SetRefreshCallback(func(g *glfw.Window) { reshape(w.W, w.H) })
window.SetSizeCallback(func(g *glfw.Window, width int, height int) {
reshape(width, height)
w.W = width
w.H = height
})
version := gl.GoStr(gl.GetString(gl.VERSION))
if !silentMode {
fmt.Println("OpenGL version", version)
}
for !window.ShouldClose() {
//Reset?
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
if w.DrawFunc != nil {
w.DrawFunc()
}
// Maintenance
gl.Flush()
window.SwapBuffers()
glfw.PollEvents()
}
}
