func NewGmat4RotationZ(amount gl.Float) Gmat4 {
var c, s = gl.Float(math.Cos(float64(amount))), gl.Float(math.Sin(float64(amount)))
return Gmat4{
c, -s, 0, 0,
s, c, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1,
}
}
func NewGmat4Rotation(angle gl.Float, vec Gvec3) Gmat4 {
var c, s = gl.Float(math.Cos(float64(angle))), gl.Float(math.Sin(float64(angle)))
return Gmat4{
c, -s, 0, 0,
s, c, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1,
}
}
func NewGmat4Perspective(yFov, aspect, zNear, zFar gl.Float) Gmat4 {
var f = gl.Float(math.Tan((math.Pi / 2) - float64(yFov)))
return Gmat4{
f / aspect, 0, 0, 0,
0, f, 0, 0,
0, 0, (zFar + zNear) / (zNear - zFar), (2 * zFar * zNear) / (zNear - zFar),
0, 0, -1, 0,
}
}
func MakeTextureFromImageFloatsFile(filePath string, w, h int) gl.Uint {
var file, err = os.Open(filePath)
var tex gl.Uint
var pix = make([]gl.Float, w*h*3)
var fVal float32
var raw []uint8
var buf *bytes.Buffer
var i int
if err != nil {
panic(err)
}
defer file.Close()
raw, err = ioutil.ReadAll(file)
if err != nil {
panic(err)
}
buf = bytes.NewBuffer(raw)
for i = 0; (err == nil) && (i < len(pix)); i++ {
if err = binary.Read(buf, binary.LittleEndian, &fVal); err == io.EOF {
err = nil
break
} else if err == nil {
pix[i] = gl.Float(fVal)
}
}
if err != nil {
panic(err)
}
sw, sh := gl.Sizei(w), gl.Sizei(h)
gl.GenTextures(1, &tex)
gl.BindTexture(gl.TEXTURE_2D, tex)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT)
gl.TexStorage2D(gl.TEXTURE_2D, 1, gl.RGB16F, sw, sh)
gl.TexSubImage2D(gl.TEXTURE_2D, 0, 0, 0, sw, sh, gl.RGB, gl.FLOAT, gl.Pointer(&pix[0]))
gl.BindTexture(gl.TEXTURE_2D, 0)
PanicIfErrors("MakeTextureFromImageFloatsFile(%v)", filePath)
return tex
}
func Loop(onKeyDown, onKeyUp func(*sdl.KeyboardEvent)) {
var nowTime = time.Now()
var lastSecond, lastTime = nowTime, nowTime
var nowNano int64 = 0
var durSec time.Duration
var sdlEvt sdl.Event
var winw, winh int
var retro int = int(Canvas0.RetroFactor)
var canvas0RetroFactor = 1 / Canvas0.RetroFactor
gl.Enable(gl.FRAMEBUFFER_SRGB)
for Looping {
nowTime = time.Now()
pipeline.TimeLast, pipeline.TimeNow = lastTime, nowTime
pipeline.TimeSecsElapsed = nowTime.Sub(lastTime).Seconds()
lastTime = nowTime
nowNano = nowTime.UnixNano()
Canvas0.TimeElapsed = nowNano - StartTime
durSec = nowTime.Sub(lastSecond)
if sdlEvt = sdl.PollEvent(); sdlEvt != nil {
switch event := sdlEvt.(type) {
case *sdl.ResizeEvent:
winw, winh = int(event.W), int(event.H)
if retro > 0 {
for (winw % retro) != 0 {
winw--
}
for (winh % retro) != 0 {
winh--
}
if (winw / retro) < 32 {
winw = 32 * retro
}
if (winh / retro) < 32 {
winh = 32 * retro
}
}
ReinitVideo(winw, winh, true, true)
RefreshWindowCaption()
case *sdl.QuitEvent:
Looping = false
return
case *sdl.KeyboardEvent:
if event.Type == sdl.KEYUP {
KeysPressed[event.Keysym.Sym] = false
if event.Keysym.Sym == KeySymTmpTexUp {
LoadTmpTex(TmpTexIndex + 1)
}
if event.Keysym.Sym == KeySymTmpTexDn {
LoadTmpTex(TmpTexIndex - 1)
}
// if event.Keysym.Sym == KeySymOctreeLevelUp { softpipeline.OctreeMaxLevel++ }
// if event.Keysym.Sym == KeySymOctreeLevelDown { softpipeline.OctreeMaxLevel-- }
onKeyUp(event)
} else if event.Type == sdl.KEYDOWN {
KeysPressed[event.Keysym.Sym] = true
onKeyDown(event)
}
case *sdl.MouseMotionEvent:
MouseX, MouseY = float64(event.X)*canvas0RetroFactor, float64(event.Y)*canvas0RetroFactor
Canvas0.MouseX, Canvas0.MouseY = gl.Float(MouseX*Canvas0.InvWidth), gl.Float(MouseY*Canvas0.InvHeight)
}
}
pipeline.CamMove, pipeline.CamTurn = false, false
if KeysPressed[sdl.K_UP] {
pipeline.CamMove, pipeline.CamMoveFwd = true, 1
} else {
pipeline.CamMoveFwd = 0
}
if KeysPressed[sdl.K_DOWN] {
pipeline.CamMove, pipeline.CamMoveBack = true, 1
} else {
pipeline.CamMoveBack = 0
}
if KeysPressed[sdl.K_LEFT] {
pipeline.CamTurn, pipeline.CamTurnLeft = true, 1
} else {
pipeline.CamTurnLeft = 0
}
if KeysPressed[sdl.K_RIGHT] {
pipeline.CamTurn, pipeline.CamTurnRight = true, 1
} else {
pipeline.CamTurnRight = 0
}
if KeysPressed[sdl.K_PAGEUP] {
pipeline.CamTurn, pipeline.CamTurnUp = true, 1
} else {
pipeline.CamTurnUp = 0
}
if KeysPressed[sdl.K_PAGEDOWN] {
pipeline.CamTurn, pipeline.CamTurnDown = true, 1
} else {
pipeline.CamTurnDown = 0
}
// if KeysPressed[sdl.K_RSHIFT] { pipeline.SpeedUp = 10 } else { pipeline.SpeedUp = 1 }
if KeysPressed[sdl.K_a] {
pipeline.CamMove, pipeline.CamMoveLeft = true, 1
} else {
pipeline.CamMoveLeft = 0
}
if KeysPressed[sdl.K_d] {
pipeline.CamMove, pipeline.CamMoveRight = true, 1
} else {
pipeline.CamMoveRight = 0
}
if KeysPressed[sdl.K_w] {
pipeline.CamMove, pipeline.CamMoveUp = true, 1
} else {
pipeline.CamMoveUp = 0
}
if KeysPressed[sdl.K_s] {
pipeline.CamMove, pipeline.CamMoveDown = true, 1
} else {
pipeline.CamMoveDown = 0
}
if durSec.Seconds() < 1 {
Fps++
} else {
RefreshWindowCaption()
Fps = 0
lastSecond = nowTime
}
pipeline.PreRender()
// gl.Disable(gl.FRAMEBUFFER_SRGB)
Canvas0.RenderContent()
// Canvas0.RenderPostFx()
// gl.BindFramebuffer(gl.FRAMEBUFFER, 0)
// gl.Viewport(0, 0, gl.Sizei(Screen.W), gl.Sizei(Screen.H))
// Canvas0.RenderSelf()
sdl.GL_SwapBuffers()
glutil.PanicIfErrors("Post Render Loop")
}
}
func WriteFloatsVec4(vec num.Vec3, vecW float64, index int, glFloats []gl.Float) {
glFloats[index+0], glFloats[index+1], glFloats[index+2], glFloats[index+3] = gl.Float(vec.X), gl.Float(vec.Y), gl.Float(vec.Z), gl.Float(vecW)
}
func WriteFloatsVec3(vec num.Vec3, index int, glFloats []gl.Float) {
glFloats[index+0], glFloats[index+1], glFloats[index+2] = gl.Float(vec.X), gl.Float(vec.Y), gl.Float(vec.Z)
}
func WriteFloats4(vecX, vecY, vecZ, vecW float64, index int, glFloats []gl.Float) {
glFloats[index+0], glFloats[index+1], glFloats[index+2], glFloats[index+3] = gl.Float(vecX), gl.Float(vecY), gl.Float(vecZ), gl.Float(vecW)
}
func (me Gvec3) Magnitude() gl.Float {
return gl.Float(math.Sqrt(float64(me.LenSqrt())))
}