func (sys *RenderSystem) renderOne(timestep time.Duration) error {
gogre3d.MessagePump()
if sys.w.IsClosed() {
return errors.New("window closed")
}
if !sys.r.RenderOneFrameEx(float32(timestep.Nanoseconds()) / 1000000) {
return errors.New("error during render")
}
return nil
}
func main() {
// CONFIGURATION
root := gogre3d.NewRoot("", "", "ogre.log")
root.LoadPlugin("RenderSystem_GL")
rs := root.GetRenderSystemByName("OpenGL Rendering Subsystem")
rs.SetConfigOption("Full Screen", "No")
rs.SetConfigOption("VSync", "No")
rs.SetConfigOption("Video Mode", "800 x 600 @ 32-bit")
root.SetRenderSystem(rs)
// VIEW
window := root.Initialise(true, "gogre3d sample")
sm := root.CreateSceneManager("DefaultSceneManager", "The SceneManager")
cam := sm.CreateCamera("MyCamera")
cam.SetPosition(0, 0, 80)
cam.LookAt(0, 0, -300)
cam.SetNearClipDistance(5)
vp := window.AddViewport(cam)
vp.SetBackgroundColour(0.01, 0, 0, 0)
cam.SetAspectRatio(vp.GetActualWidth(), vp.GetActualHeight())
gogre3d.SetDefaultNumMipmaps(5)
// RESOURCES
rgm := gogre3d.GetResourceGroupManager()
rgm.AddResourceLocation("./media/fonts", "FileSystem", "Default")
rgm.AddResourceLocation("./media/models", "FileSystem", "Default")
rgm.AddResourceLocation("./media/materials/scripts", "FileSystem", "Default")
rgm.AddResourceLocation("./media/materials/programs", "FileSystem", "Default")
rgm.AddResourceLocation("./media/materials/textures", "FileSystem", "Default")
rgm.InitialiseAllResourceGroups()
// SCENE
sm.SetAmbientLight(0.5, 0.5, 0.5)
head := sm.CreateEntity("Head", "ogrehead.mesh", "Default")
headnode := sm.CreateChildSceneNode("Head")
headnode.Attach(head)
light := sm.CreateLight("MyLight")
light.SetPosition(20, 80, 50)
// INPUT
i := gogre3d.NewInput(window)
kb := i.NewKeyboard(false)
m := i.NewMouse(false)
m.DisplayArea(800, 600)
// LOOP
ticker := time.Tick(40 * time.Millisecond)
running := true
for running {
gogre3d.MessagePump()
if window.IsClosed() {
running = false
break
}
// KEYBOARD CONTROLS
kb.Capture()
if kb.KeyDown(gogre3d.KC_LEFT) {
headnode.Yaw(-0.1, gogre3d.TS_LOCAL)
}
if kb.KeyDown(gogre3d.KC_RIGHT) {
headnode.Yaw(0.1, gogre3d.TS_LOCAL)
}
if kb.KeyDown(gogre3d.KC_UP) {
headnode.Pitch(-0.1, gogre3d.TS_LOCAL)
}
if kb.KeyDown(gogre3d.KC_DOWN) {
headnode.Pitch(0.1, gogre3d.TS_LOCAL)
}
if kb.KeyDown(gogre3d.KC_ESCAPE) {
running = false
break
}
// MOUSE CONTROLS
m.Capture()
ms := m.State()
headnode.Yaw(0.01*float32(ms.X.Rel), gogre3d.TS_WORLD)
headnode.Pitch(0.01*float32(ms.Y.Rel), gogre3d.TS_WORLD)
if ms.ButtonPressed(gogre3d.MB_Left) {
headnode.ResetOrientation()
}
// RENDER SCENE
if error := root.RenderOneFrame(); error == false {
running = false
break
}
// THROTTLE FRAMERATE
<-ticker
}
// CLEANUP
root.Destroy()
return
}