static unsafe void RenderThread(Sample sample)
{
// initialize the renderer
Bgfx.Init(RendererBackend.Direct3D11);
Bgfx.Reset(sample.WindowWidth, sample.WindowHeight, ResetFlags.Vsync);
// enable debug text
Bgfx.SetDebugFeatures(DebugFeatures.DisplayText);
// load shaders
var programTextureLighting = ResourceLoader.LoadProgram("vs_stencil_texture_lighting", "fs_stencil_texture_lighting");
var programColorLighting = ResourceLoader.LoadProgram("vs_stencil_color_lighting", "fs_stencil_color_lighting");
var programColorTexture = ResourceLoader.LoadProgram("vs_stencil_color_texture", "fs_stencil_color_texture");
var programColorBlack = ResourceLoader.LoadProgram("vs_stencil_color", "fs_stencil_color_black");
var programTexture = ResourceLoader.LoadProgram("vs_stencil_texture", "fs_stencil_texture");
// load meshes
var bunnyMesh = ResourceLoader.LoadMesh("bunny.bin");
var columnMesh = ResourceLoader.LoadMesh("column.bin");
var hplaneMesh = new Mesh(MemoryBlock.FromArray(StaticMeshes.HorizontalPlane), PosNormalTexcoordVertex.Layout, StaticMeshes.PlaneIndices);
var vplaneMesh = new Mesh(MemoryBlock.FromArray(StaticMeshes.VerticalPlane), PosNormalTexcoordVertex.Layout, StaticMeshes.PlaneIndices);
// load textures
var figureTex = ResourceLoader.LoadTexture("figure-rgba.dds");
var flareTex = ResourceLoader.LoadTexture("flare.dds");
var fieldstoneTex = ResourceLoader.LoadTexture("fieldstone-rgba.dds");
// create uniforms
var colorTextureHandle = new Uniform("u_texColor", UniformType.Int1);
var uniforms = new Uniforms();
uniforms.SubmitConstUniforms();
// light colors
uniforms.LightColor = new[] {
new Vector4(1.0f, 0.7f, 0.2f, 0.0f), // yellow
new Vector4(0.7f, 0.2f, 1.0f, 0.0f), // purple
new Vector4(0.2f, 1.0f, 0.7f, 0.0f), // cyan
new Vector4(1.0f, 0.4f, 0.2f, 0.0f) // orange
};
// camera
var camera = new Camera(60.0f, sample.WindowWidth, sample.WindowHeight, 0.1f, 100.0f);
camera.Position = new Vector3(0.0f, 18.0f, -40.0f);
// start the frame clock
var clock = new Clock();
clock.Start();
// main loop
while (sample.ProcessEvents(ResetFlags.Vsync)) {
// 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/13-Stencil");
Bgfx.DebugTextWrite(0, 2, DebugColor.White, DebugColor.Cyan, "Description: Stencil reflections.");
Bgfx.DebugTextWrite(0, 3, DebugColor.White, DebugColor.Cyan, "Frame: {0:F3} ms", elapsed * 1000);
// clear the background
Bgfx.SetViewClear(BaseId, ClearTargets.Color | ClearTargets.Depth | ClearTargets.Stencil, 0x30303000);
Bgfx.SetViewRect(BaseId, 0, 0, sample.WindowWidth, sample.WindowHeight);
Bgfx.Touch(BaseId);
// set view params for each pass
var viewMtx = camera.GetViewMatrix();
var projMtx = camera.GetProjectionMatrix();
for (byte i = PassId0; i <= PassId4; i++) {
Bgfx.SetViewRect(i, 0, 0, sample.WindowWidth, sample.WindowHeight);
Bgfx.SetViewTransform(i, (float*)&viewMtx, (float*)&projMtx);
}
// first pass - draw ground plane
var floorMtx = FloorTransform;
hplaneMesh.Submit(PassId0, programColorBlack, &floorMtx, StateGroups[PrebuiltRenderState.StencilReflectionCraftStencil], uniforms);
// second pass - reflected objects
Bgfx.SetViewClear(PassId1, ClearTargets.Depth, 0);
uniforms.AmbientPass = true;
uniforms.LightingPass = true;
uniforms.Color = new Vector4(0.70f, 0.65f, 0.60f, 0.8f);
uniforms.LightCount = LightCount;
// light positions
var lightPositions = new Vector4[LightCount];
var reflectedLights = new Vector4[LightCount];
for (int i = 0; i < lightPositions.Length; i++) {
var v3 = new Vector3(
(float)Math.Sin(time * 1.1 + i * 0.03 + i * 1.07 * Math.PI / 2) * 20.0f,
8.0f + (1.0f - (float)Math.Cos(time * 1.5 + i * 0.29 + 1.49f * Math.PI / 2)) * 4.0f,
(float)Math.Cos(time * 1.3 + i * 0.13 + i * 1.79 * Math.PI / 2) * 20.0f
);
lightPositions[i] = new Vector4(v3, 15.0f);
reflectedLights[i] = new Vector4(Vector3.Transform(v3, ReflectionTransform), 15.0f);
}
uniforms.LightPosRadius = reflectedLights;
var bunnyMtx =
Matrix4x4.CreateScale(5) *
Matrix4x4.CreateRotationY(time - 1.56f) *
Matrix4x4.CreateTranslation(0.0f, 2.0f, 0.0f);
var reflectedBunnyMtx = bunnyMtx * ReflectionTransform;
bunnyMesh.Submit(PassId1, programColorLighting, &reflectedBunnyMtx, StateGroups[PrebuiltRenderState.StencilReflectionDrawReflected], uniforms);
for (int i = 0; i < 4; i++) {
var mtx = ColumnTransforms[i] * ReflectionTransform;
columnMesh.Submit(PassId1, programColorLighting, &mtx, StateGroups[PrebuiltRenderState.StencilReflectionDrawReflected], uniforms);
}
// third pass - blend the plane and reflections
uniforms.LightPosRadius = lightPositions;
hplaneMesh.Submit(PassId2, programTextureLighting, &floorMtx, StateGroups[PrebuiltRenderState.StencilReflectionBlendPlane], uniforms, fieldstoneTex, colorTextureHandle);
// fourth pass - draw the solid objects
bunnyMesh.Submit(PassId3, programColorLighting, &bunnyMtx, StateGroups[PrebuiltRenderState.StencilReflectionDrawScene], uniforms);
for (int i = 0; i < 4; i++) {
var mtx = ColumnTransforms[i];
columnMesh.Submit(PassId3, programColorLighting, &mtx, StateGroups[PrebuiltRenderState.StencilReflectionDrawScene], uniforms);
}
// fifth pass - draw the lights as objects
for (int i = 0; i < LightCount; i++) {
var c = uniforms.LightColor[i];
uniforms.Color = new Vector4(c.X, c.Y, c.Z, 0.8f);
var p = lightPositions[i];
var mtx = Matrix4x4.CreateScale(1.5f) * Matrix4x4.CreateBillboard(new Vector3(p.X, p.Y, p.Z), camera.Position, Vector3.UnitY, -Vector3.UnitZ);
vplaneMesh.Submit(PassId4, programColorTexture, &mtx, StateGroups[PrebuiltRenderState.CustomBlendLightTexture], uniforms, flareTex, colorTextureHandle);
}
// advance to the next frame. Rendering thread will be kicked to
// process submitted rendering primitives.
Bgfx.Frame();
}
// clean up
bunnyMesh.Dispose();
columnMesh.Dispose();
hplaneMesh.Dispose();
vplaneMesh.Dispose();
figureTex.Dispose();
fieldstoneTex.Dispose();
flareTex.Dispose();
programTextureLighting.Dispose();
programColorLighting.Dispose();
programColorTexture.Dispose();
programColorBlack.Dispose();
programTexture.Dispose();
colorTextureHandle.Dispose();
uniforms.Dispose();
Bgfx.Shutdown();
}
