static unsafe void RenderThread(Sample sample)
{
// initialize the renderer
Bgfx.Init();
Bgfx.Reset(sample.WindowWidth, sample.WindowHeight, ResetFlags.Vsync);
// enable debug text
Bgfx.SetDebugFeatures(DebugFeatures.DisplayText);
// set view 0 clear state
Bgfx.SetViewClear(0, ClearTargets.Color | ClearTargets.Depth, 0x303030ff);
// create vertex and index buffers
var vbh = Cube.CreateVertexBuffer();
var ibh = Cube.CreateIndexBuffer();
// load shaders
var program = ResourceLoader.LoadProgram("vs_cubes", "fs_cubes");
// start the frame clock
var clock = new Clock();
clock.Start();
var imguiController = new ImGuiController(1);
var image = imguiController.AddTexture(ResourceLoader.LoadTexture("fieldstone-rgba.dds"));
// main loop
while (sample.ProcessEvents(ResetFlags.Vsync))
{
// set view 0 viewport
Bgfx.SetViewRect(0, 0, 0, sample.WindowWidth, sample.WindowHeight);
// view transforms
var viewMatrix = Matrix4x4.CreateLookAt(new Vector3(0.0f, 0.0f, -35.0f), Vector3.Zero, Vector3.UnitY);
var projMatrix = Matrix4x4.CreatePerspectiveFieldOfView((float)Math.PI / 3, (float)sample.WindowWidth / sample.WindowHeight, 0.1f, 100.0f);
Bgfx.SetViewTransform(0, &viewMatrix.M11, &projMatrix.M11);
// make sure view 0 is cleared if no other draw calls are submitted
Bgfx.Touch(0);
// tick the clock
var elapsed = clock.Frame();
var time = clock.TotalTime();
// write some debug text
Bgfx.DebugTextClear();
Bgfx.DebugTextWrite(0, 1, DebugColor.White, DebugColor.Blue, "SharpBgfx/Samples/ImGui");
Bgfx.DebugTextWrite(0, 2, DebugColor.White, DebugColor.Cyan, "Description: Rendering simple static mesh.");
Bgfx.DebugTextWrite(0, 3, DebugColor.White, DebugColor.Cyan, "Frame: {0:F3} ms", elapsed * 1000);
// submit 11x11 cubes
for (int y = 0; y < 11; y++)
{
for (int x = 0; x < 11; x++)
{
// model matrix
var transform = Matrix4x4.CreateFromYawPitchRoll(time + x * 0.21f, time + y * 0.37f, 0.0f);
transform.M41 = -15.0f + x * 3.0f;
transform.M42 = -15.0f + y * 3.0f;
transform.M43 = 0.0f;
Bgfx.SetTransform(&transform.M11);
// set pipeline states
Bgfx.SetVertexBuffer(0, vbh);
Bgfx.SetIndexBuffer(ibh);
Bgfx.SetRenderState(RenderState.Default);
// submit primitives
Bgfx.Submit(0, program);
}
}
imguiController.StartFrame();
ImGui.ShowDemoWindow();
ImGui.SetNextWindowPos(new Vector2(100, 100));
ImGui.SetNextWindowSize(new Vector2(400, 400));
ImGui.Begin("Drawing an image");
ImGui.Image(image, new Vector2(((float)Math.Sin(clock.TotalTime()) + 1) * 200, ((float)Math.Sin(clock.TotalTime()) + 1) * 200));
ImGui.End();
imguiController.EndFrame(elapsed, new Vector2(sample.WindowWidth, sample.WindowHeight));
// advance to the next frame. Rendering thread will be kicked to
// process submitted rendering primitives.
Bgfx.Frame();
}
// clean up
ibh.Dispose();
vbh.Dispose();
program.Dispose();
Bgfx.Shutdown();
}
