static void Main(string[] args)
{
_useOculus = true;
if (!VRContext.IsOculusSupported())
{
_useOculus = false;
if (!VRContext.IsOpenVRSupported())
{
Console.WriteLine("This sample requires an Oculus or OpenVR-capable headset.");
return;
}
}
Sdl2Window window = VeldridStartup.CreateWindow(
new WindowCreateInfo(
Sdl2Native.SDL_WINDOWPOS_CENTERED, Sdl2Native.SDL_WINDOWPOS_CENTERED,
1280, 720,
WindowState.Normal,
"Veldrid.VirtualReality Sample"));
VRContextOptions options = new VRContextOptions
{
EyeFramebufferSampleCount = TextureSampleCount.Count4
};
VRContext vrContext = _useOculus ? VRContext.CreateOculus(options) : VRContext.CreateOpenVR(options);
GraphicsBackend backend = GraphicsBackend.Direct3D11;
bool debug = false;
#if DEBUG
debug = true;
#endif
GraphicsDeviceOptions gdo = new GraphicsDeviceOptions(debug, null, false, ResourceBindingModel.Improved, true, true, true);
if (backend == GraphicsBackend.Vulkan)
{
// Oculus runtime causes validation errors.
gdo.Debug = false;
}
(GraphicsDevice gd, Swapchain sc) = CreateDeviceAndSwapchain(window, vrContext, backend, gdo);
window.Resized += () => sc.Resize((uint)window.Width, (uint)window.Height);
vrContext.Initialize(gd);
ImGuiRenderer igr = new ImGuiRenderer(gd, sc.Framebuffer.OutputDescription, window.Width, window.Height, ColorSpaceHandling.Linear);
window.Resized += () => igr.WindowResized(window.Width, window.Height);
AssimpMesh mesh = new AssimpMesh(
gd,
vrContext.LeftEyeFramebuffer.OutputDescription,
Path.Combine(AppContext.BaseDirectory, "cat", "cat.obj"),
Path.Combine(AppContext.BaseDirectory, "cat", "cat_diff.png"));
Skybox skybox = new Skybox(
Image.Load <Rgba32>(Path.Combine(AppContext.BaseDirectory, "skybox", "miramar_ft.png")),
Image.Load <Rgba32>(Path.Combine(AppContext.BaseDirectory, "skybox", "miramar_bk.png")),
Image.Load <Rgba32>(Path.Combine(AppContext.BaseDirectory, "skybox", "miramar_lf.png")),
Image.Load <Rgba32>(Path.Combine(AppContext.BaseDirectory, "skybox", "miramar_rt.png")),
Image.Load <Rgba32>(Path.Combine(AppContext.BaseDirectory, "skybox", "miramar_up.png")),
Image.Load <Rgba32>(Path.Combine(AppContext.BaseDirectory, "skybox", "miramar_dn.png")));
skybox.CreateDeviceObjects(gd, vrContext.LeftEyeFramebuffer.OutputDescription);
CommandList windowCL = gd.ResourceFactory.CreateCommandList();
CommandList eyesCL = gd.ResourceFactory.CreateCommandList();
MirrorTextureEyeSource eyeSource = MirrorTextureEyeSource.BothEyes;
Stopwatch sw = Stopwatch.StartNew();
double lastFrameTime = sw.Elapsed.TotalSeconds;
while (window.Exists)
{
double newFrameTime = sw.Elapsed.TotalSeconds;
double deltaSeconds = newFrameTime - lastFrameTime;
lastFrameTime = newFrameTime;
InputSnapshot snapshot = window.PumpEvents();
if (!window.Exists)
{
break;
}
InputTracker.UpdateFrameInput(snapshot, window);
HandleInputs(deltaSeconds);
igr.Update(1f / 60f, snapshot);
if (ImGui.BeginMainMenuBar())
{
if (ImGui.BeginMenu("Settings"))
{
if (ImGui.BeginMenu("Mirror Texture"))
{
if (ImGui.MenuItem("Both Eyes", null, eyeSource == MirrorTextureEyeSource.BothEyes))
{
eyeSource = MirrorTextureEyeSource.BothEyes;
}
if (ImGui.MenuItem("Left Eye", null, eyeSource == MirrorTextureEyeSource.LeftEye))
{
eyeSource = MirrorTextureEyeSource.LeftEye;
}
if (ImGui.MenuItem("Right Eye", null, eyeSource == MirrorTextureEyeSource.RightEye))
{
eyeSource = MirrorTextureEyeSource.RightEye;
}
ImGui.EndMenu();
}
if (ImGui.BeginMenu("VR API"))
{
if (ImGui.MenuItem("Oculus", null, _useOculus) && !_useOculus)
{
_useOculus = true;
_switchVRContext = true;
}
if (ImGui.MenuItem("OpenVR", null, !_useOculus) && _useOculus)
{
_useOculus = false;
_switchVRContext = true;
}
ImGui.EndMenu();
}
ImGui.EndMenu();
}
ImGui.EndMainMenuBar();
}
windowCL.Begin();
windowCL.SetFramebuffer(sc.Framebuffer);
windowCL.ClearColorTarget(0, new RgbaFloat(0f, 0f, 0.2f, 1f));
vrContext.RenderMirrorTexture(windowCL, sc.Framebuffer, eyeSource);
igr.Render(gd, windowCL);
windowCL.End();
gd.SubmitCommands(windowCL);
gd.SwapBuffers(sc);
HmdPoseState poses = vrContext.WaitForPoses();
// Render Eyes
eyesCL.Begin();
eyesCL.PushDebugGroup("Left Eye");
Matrix4x4 leftView = poses.CreateView(VREye.Left, _userPosition, -Vector3.UnitZ, Vector3.UnitY);
RenderEye(eyesCL, vrContext.LeftEyeFramebuffer, mesh, skybox, poses.LeftEyeProjection, leftView);
eyesCL.PopDebugGroup();
eyesCL.PushDebugGroup("Right Eye");
Matrix4x4 rightView = poses.CreateView(VREye.Right, _userPosition, -Vector3.UnitZ, Vector3.UnitY);
RenderEye(eyesCL, vrContext.RightEyeFramebuffer, mesh, skybox, poses.RightEyeProjection, rightView);
eyesCL.PopDebugGroup();
eyesCL.End();
gd.SubmitCommands(eyesCL);
vrContext.SubmitFrame();
if (_switchVRContext)
{
_switchVRContext = false;
vrContext.Dispose();
vrContext = _useOculus ? VRContext.CreateOculus() : VRContext.CreateOpenVR();
vrContext.Initialize(gd);
}
}
vrContext.Dispose();
gd.Dispose();
}
private static void RenderEye(CommandList cl, Framebuffer fb, AssimpMesh mesh, Skybox skybox, Matrix4x4 proj, Matrix4x4 view)
{
cl.SetFramebuffer(fb);
cl.ClearDepthStencil(1f);
cl.ClearColorTarget(0, RgbaFloat.CornflowerBlue);
mesh.Render(cl, new UBO(
proj,
view,
Matrix4x4.CreateScale(1f) * Matrix4x4.CreateTranslation(0f, -1, -2f)));
mesh.Render(cl, new UBO(
proj,
view,
Matrix4x4.CreateScale(0.66f) * Matrix4x4.CreateTranslation(-0.5f, -1, -2f)));
mesh.Render(cl, new UBO(
proj,
view,
Matrix4x4.CreateScale(1.5f) * Matrix4x4.CreateTranslation(0.5f, -1, -2f)));
skybox.Render(cl, fb, proj, view);
}
