/* ***************** MAIN FUNCTION ************************ */
func main() {
/* **************** OVR INIT CODE ***************** */
if err := glfw.Init(); err != nil {
log.Fatalln("failed to initialize glfw")
}
defer glfw.Terminate()
C.ovr_Initialize(nil)
//create an HMD for reference.
var hmd C.ovrHmd = nil
// find number of headsets
hmdCount := (int)(C.ovrHmd_Detect())
// print headset count
fmt.Println(hmdCount)
fmt.Printf("Found %d connected Rift device(s)\n\n", hmdCount)
// grab the first headset
if hmdCount > 0 {
for i := 0; i < 1; i++ {
hmd = C.ovrHmd_Create((C.int)(i))
//Print headset name
fmt.Println(C.GoString(hmd.ProductName))
}
}
//if there is no headset connected, create a new debug.
if hmd == nil {
fmt.Println("Unable to open rift device\n Creating debug device.\n")
hmd = C.ovrHmd_CreateDebug(C.ovrHmd_DK2)
}
//Starts the sensor device
if C.ovrHmd_ConfigureTracking(hmd, C.ovrTrackingCap_Orientation|C.ovrTrackingCap_Position, 0) == 0 {
fmt.Println("Unable to start Rift head tracker\n")
}
//extendedMode := C.ovrHmdCap_ExtendDesktop & hmd.HmdCaps
//positioning of window and size of window
var outposition mgl32.Vec2
outposition[0] = (float32)(hmd.WindowsPos.x)
outposition[1] = (float32)(hmd.WindowsPos.y)
//TODO: Change this to output at chosen resolution, not necessarily native pg. 76 Oculus Rift in action
var outsize mgl32.Vec2
outsize[0] = (float32)(hmd.Resolution.w)
outsize[1] = (float32)(hmd.Resolution.h)
//print position and sizes to console
fmt.Printf("Rift position:\t\t %f \t %f \nRift Size:\t\t %f \t %f \n\n", outposition.X(), outposition.Y(), outsize.X(), outsize.Y())
monitors := glfw.GetMonitors()
var riftIndex int
//loop over the monitors
for index, element := range monitors {
//print the monitor positions
posX, posY := element.GetPos()
fmt.Printf("Monitor Position:\t\t %d \t %d\n", posX, posY)
if float32(posX) == outposition.X() && float32(posY) == outposition.Y() {
riftIndex = index
}
}
//Get video mode of monitor
mode := monitors[riftIndex].GetVideoMode()
outsize[0] = float32(mode.Width)
outsize[1] = float32(mode.Height)
/* ***************************************************** */
// ************* OPENGL / GLFW INIT CODE ************** */
glfw.WindowHint(glfw.Decorated, 0)
glfw.WindowHint(glfw.Resizable, glfw.False)
glfw.WindowHint(glfw.ContextVersionMajor, 4)
glfw.WindowHint(glfw.ContextVersionMinor, 1)
glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)
window, err := glfw.CreateWindow(int(outsize.X()), int(outsize.Y()), "LinuxVR", nil, nil)
window.SetPos(int(outposition.X()), int(outposition.Y()))
if gl.Init(); err != nil {
panic(err)
}
window.MakeContextCurrent()
//Print OpenGL Version to console
version := gl.GoStr(gl.GetString(gl.VERSION))
fmt.Println("OpenGL Version", version, "\n\n")
//keyboard input callback
window.SetKeyCallback(onKey)
/* **************************************************** */
previousTime := glfw.GetTime()
totalTime := 0.0000
/* ******************* MAIN LOOP ******************** */
for !window.ShouldClose() {
glfw.PollEvents()
//Update
time := glfw.GetTime()
elapsed := time - previousTime
previousTime = time
totalTime = totalTime + elapsed
//get current head state
state := C.ovrHmd_GetTrackingState(hmd, 0)
orientation := state.HeadPose.ThePose.Orientation
//convert to go type float32
var q mgl32.Quat
q.W = (float32)(orientation.w)
q.V[0] = (float32)(orientation.x)
q.V[1] = (float32)(orientation.y)
q.V[2] = (float32)(orientation.z)
//publish tracking information once a second
if totalTime >= 1 {
fmt.Printf("w: %f X: %f Y: %f Z: %f\n", q.W, q.X(), q.Y(), q.Z())
totalTime = 0
}
//basic opengl things
draw(window)
//Swap buffers
window.SwapBuffers()
//Poll for events (keyboard, resize, etc)
}
/* ***************** OVR SHUTDOWN ******************** */
C.ovrHmd_Destroy(hmd)
C.ovr_Shutdown()
}
// SetGlQuat copies the values from one math library vector to another.
func SetGlQuat(dst *mgl.Quat, src *m.Quat) {
dst.W = float32(src[0])
dst.V[0] = float32(src[1])
dst.V[1] = float32(src[2])
dst.V[2] = float32(src[3])
}