int main()
{
////////////////////
// ionEngine Init //
////////////////////
Log::AddDefaultOutputs();
SingletonPointer<CGraphicsAPI> GraphicsAPI;
SingletonPointer<CWindowManager> WindowManager;
SingletonPointer<CTimeManager> TimeManager;
SingletonPointer<CSceneManager> SceneManager;
SingletonPointer<CAssetManager> AssetManager;
SingletonPointer<CGUIManager> GUIManager;
GraphicsAPI->Init(new Graphics::COpenGLImplementation());
WindowManager->Init(GraphicsAPI);
TimeManager->Init(WindowManager);
SceneManager->Init(GraphicsAPI);
AssetManager->Init(GraphicsAPI);
//CWindow * Window = WindowManager->CreateWindow(vec2i(1600, 900), "DemoApplication", EWindowType::Windowed);
CWindow * Window = WindowManager->CreateWindowOnMonitor(2, "SSAO");
GUIManager->Init(Window);
Window->AddListener(GUIManager);
AssetManager->AddAssetPath("Assets/");
AssetManager->SetShaderPath("Shaders/");
AssetManager->SetTexturePath("Images/");
SharedPointer<IGraphicsContext> Context = GraphicsAPI->GetWindowContext(Window);
SharedPointer<IRenderTarget> BackBuffer = Context->GetBackBuffer();
BackBuffer->SetClearColor(color3f(0.3f));
SharedPointer<IFrameBuffer> SceneFrameBuffer = Context->CreateFrameBuffer();
SharedPointer<ITexture2D> SceneColor = GraphicsAPI->CreateTexture2D(Window->GetSize(), ITexture::EMipMaps::False, ITexture::EFormatComponents::RGB, ITexture::EInternalFormatType::Fix8);
SceneColor->SetMinFilter(ITexture::EFilter::Nearest);
SceneColor->SetMagFilter(ITexture::EFilter::Nearest);
SceneColor->SetWrapMode(ITexture::EWrapMode::Clamp);
SharedPointer<ITexture2D> SceneNormal = GraphicsAPI->CreateTexture2D(Window->GetSize(), ITexture::EMipMaps::False, ITexture::EFormatComponents::RGB, ITexture::EInternalFormatType::Fix8);
SceneNormal->SetMinFilter(ITexture::EFilter::Nearest);
SceneNormal->SetMagFilter(ITexture::EFilter::Nearest);
SceneNormal->SetWrapMode(ITexture::EWrapMode::Clamp);
SharedPointer<ITexture2D> SceneDepth = GraphicsAPI->CreateTexture2D(Window->GetSize(), ITexture::EMipMaps::False, ITexture::EFormatComponents::R, ITexture::EInternalFormatType::Depth);
SceneFrameBuffer->AttachColorTexture(SceneColor, 0);
SceneFrameBuffer->AttachColorTexture(SceneNormal, 1);
SceneFrameBuffer->AttachDepthTexture(SceneDepth);
if (! SceneFrameBuffer->CheckCorrectness())
{
Log::Error("Frame buffer not valid!");
}
SharedPointer<IFrameBuffer> PingFrameBuffer = Context->CreateFrameBuffer();
SharedPointer<ITexture2D> PingColor = GraphicsAPI->CreateTexture2D(Window->GetSize(), ITexture::EMipMaps::False, ITexture::EFormatComponents::RGB, ITexture::EInternalFormatType::Fix8);
PingColor->SetMinFilter(ITexture::EFilter::Nearest);
PingColor->SetMagFilter(ITexture::EFilter::Nearest);
PingColor->SetWrapMode(ITexture::EWrapMode::Clamp);
PingFrameBuffer->AttachColorTexture(PingColor, 0);
if (! PingFrameBuffer->CheckCorrectness())
{
Log::Error("Frame buffer not valid!");
}
SharedPointer<IFrameBuffer> PongFrameBuffer = Context->CreateFrameBuffer();
SharedPointer<ITexture2D> PongColor = GraphicsAPI->CreateTexture2D(Window->GetSize(), ITexture::EMipMaps::False, ITexture::EFormatComponents::RGB, ITexture::EInternalFormatType::Fix8);
PongColor->SetMinFilter(ITexture::EFilter::Nearest);
PongColor->SetMagFilter(ITexture::EFilter::Nearest);
PongColor->SetWrapMode(ITexture::EWrapMode::Clamp);
PongFrameBuffer->AttachColorTexture(PongColor, 0);
if (! PongFrameBuffer->CheckCorrectness())
{
Log::Error("Frame buffer not valid!");
}
/////////////////
// Load Assets //
/////////////////
CSimpleMesh * SphereMesh = CGeometryCreator::CreateSphere();
CSimpleMesh * PlaneMesh = CGeometryCreator::CreatePlane(vec2f(100.f));
SharedPointer<IShader> GeometryShader = AssetManager->LoadShader("Geometry");
SharedPointer<IShader> SSAOShader = AssetManager->LoadShader("SSAO");
SharedPointer<IShader> BlurHShader = AssetManager->LoadShader("BlurH");
SharedPointer<IShader> BlurVShader = AssetManager->LoadShader("BlurV");
std::uniform_real_distribution<float> randomFloats(0.0, 1.0); // generates random floats between 0.0 and 1.0
std::default_random_engine generator;
// Sample kernel
int const numSamples = 64;
std::vector<vec3f> ssaoKernel;
for (uint i = 0; i < numSamples; ++i)
{
float const VerticalBias = 0.1f;
bool random = true;
int const sampleRegionWidth = (int) sqrt((float) numSamples);
float const a = random ? randomFloats(generator) : (float) (i / sampleRegionWidth) / (float) (sampleRegionWidth - 1);
float const b = random ? randomFloats(generator) : (float) (i % sampleRegionWidth) / (float) (sampleRegionWidth - 1);
float const c = random ? randomFloats(generator) : (float) (i % 3) / 2.f;
vec3f sample = vec3f(a * 2 - 1, b * 2 - 1, c * (1.f - VerticalBias) + VerticalBias);
sample.Normalize();
sample *= randomFloats(generator);
float scale = float(i) / numSamples;
// Scale samples s.t. they're more aligned to center of kernel
scale = lerp(0.1f, 1.0f, scale * scale);
sample *= scale;
ssaoKernel.push_back(sample);
}
// Noise texture
std::vector<float> NoiseData;
uint const NoiseTexSize = 4;
for (uint i = 0; i < NoiseTexSize * NoiseTexSize; i++)
{
NoiseData.push_back(randomFloats(generator) * 2 - 1);
NoiseData.push_back(randomFloats(generator) * 2 - 1);
NoiseData.push_back(0.0);
}
SharedPointer<ITexture2D> SSAONoise = GraphicsAPI->CreateTexture2D(vec2i(NoiseTexSize), ITexture::EMipMaps::False, ITexture::EFormatComponents::RGB, ITexture::EInternalFormatType::Float16);
SSAONoise->Upload(NoiseData.data(), vec2i(NoiseTexSize), ITexture::EFormatComponents::RGB, EScalarType::Float);
SSAONoise->SetMinFilter(ITexture::EFilter::Nearest);
SSAONoise->SetMagFilter(ITexture::EFilter::Nearest);
////////////////////
// ionScene Setup //
////////////////////
CRenderPass * RenderPass = new CRenderPass(Context);
RenderPass->SetRenderTarget(SceneFrameBuffer);
SceneManager->AddRenderPass(RenderPass);
CRenderPass * SSAOPass = new CRenderPass(Context);
SSAOPass->SetRenderTarget(PingFrameBuffer);
SceneManager->AddRenderPass(SSAOPass);
int const BlurPasses = 2;
CRenderPass * BlurHPasses[BlurPasses] = { nullptr };
CRenderPass * BlurVPasses[BlurPasses] = { nullptr };
for (int i = 0; i < BlurPasses; ++ i)
{
BlurHPasses[i] = new CRenderPass(Context);
BlurHPasses[i]->SetRenderTarget(PongFrameBuffer);
SceneManager->AddRenderPass(BlurHPasses[i]);
BlurVPasses[i] = new CRenderPass(Context);
BlurVPasses[i]->SetRenderTarget(i + 1 == BlurPasses ? BackBuffer : PingFrameBuffer);
SceneManager->AddRenderPass(BlurVPasses[i]);
}
CPerspectiveCamera * Camera = new CPerspectiveCamera(Window->GetAspectRatio());
Camera->SetPosition(vec3f(-1.7f, 2.8f, 3.4f));
Camera->SetFocalLength(0.4f);
Camera->SetNearPlane(0.1f);
Camera->SetFarPlane(50.f);
RenderPass->SetActiveCamera(Camera);
SSAOPass->SetActiveCamera(Camera);
CCameraController * Controller = new CCameraController(Camera);
Controller->SetTheta(-0.08f);
Controller->SetPhi(-0.26f);
Window->AddListener(Controller);
TimeManager->MakeUpdateTick(0.02)->AddListener(Controller);
/////////////////
// Add Objects //
/////////////////
CSimpleMeshSceneObject * Sphere1 = new CSimpleMeshSceneObject();
Sphere1->SetMesh(SphereMesh);
Sphere1->SetShader(GeometryShader);
Sphere1->SetPosition(vec3f(0, 0, 0));
Sphere1->SetScale(2.f);
Sphere1->GetMaterial().Diffuse *= color3f(1.0, 0.8f, 0.8f);
RenderPass->AddSceneObject(Sphere1);
CSimpleMeshSceneObject * Sphere2 = new CSimpleMeshSceneObject();
Sphere2->SetMesh(SphereMesh);
Sphere2->SetShader(GeometryShader);
Sphere2->SetPosition(vec3f(4, 0, 0));
Sphere2->SetScale(3.f);
Sphere2->GetMaterial().Diffuse *= color3f(0.8f, 1, 0.8f);
RenderPass->AddSceneObject(Sphere2);
CSimpleMeshSceneObject * Sphere3 = new CSimpleMeshSceneObject();
Sphere3->SetMesh(SphereMesh);
Sphere3->SetShader(GeometryShader);
Sphere3->SetPosition(vec3f(12, 0, 0));
Sphere3->SetScale(4.f);
Sphere3->GetMaterial().Diffuse *= color3f(0.8f, 0.9f, 1);
RenderPass->AddSceneObject(Sphere3);
CSimpleMeshSceneObject * Sphere4 = new CSimpleMeshSceneObject();
Sphere4->SetMesh(SphereMesh);
Sphere4->SetShader(GeometryShader);
Sphere4->SetPosition(vec3f(3, 0, 6));
Sphere4->GetMaterial().Diffuse *= color3f(0.9f, 1, 1);
RenderPass->AddSceneObject(Sphere4);
CSimpleMeshSceneObject * PlaneObject = new CSimpleMeshSceneObject();
PlaneObject->SetMesh(PlaneMesh);
PlaneObject->SetShader(GeometryShader);
RenderPass->AddSceneObject(PlaneObject);
CSimpleMesh * DragonMesh = AssetManager->LoadMeshMerged("dragon10k.obj");
CSimpleMeshSceneObject * DragonObject = new CSimpleMeshSceneObject();
DragonObject->SetMesh(DragonMesh);
DragonObject->SetShader(GeometryShader);
DragonObject->SetPosition(vec3f(6.f, 1.1f, 4.f));
DragonObject->SetScale(4.f);
RenderPass->AddSceneObject(DragonObject);
CSimpleMesh * StairMesh = AssetManager->LoadMeshMerged("SM_StairCase_02.obj");
CSimpleMeshSceneObject * StairObject = new CSimpleMeshSceneObject();
StairObject->SetMesh(StairMesh);
StairObject->SetShader(GeometryShader);
StairObject->SetPosition(vec3f(12.f, 0.f, 5.f));
StairObject->SetScale(1.f);
StairObject->SetRotation(vec3f(0.f, DegToRad(90.f), 0.f));
RenderPass->AddSceneObject(StairObject);
float SSAORadius = 1.0f;
CSimpleMeshSceneObject * PostProcessObject = new CSimpleMeshSceneObject();
PostProcessObject->SetMesh(CGeometryCreator::CreateScreenTriangle());
PostProcessObject->SetShader(SSAOShader);
PostProcessObject->SetTexture("tSceneNormals", SceneNormal);
PostProcessObject->SetTexture("tSceneDepth", SceneDepth);
PostProcessObject->SetTexture("texNoise", SSAONoise);
PostProcessObject->SetUniform("samples[0]", CUniform<vector<vec3f>>(ssaoKernel));
PostProcessObject->SetUniform("radius", std::make_shared<CUniformReference<float>>(&SSAORadius));
SSAOPass->AddSceneObject(PostProcessObject);
CUniform<bool> uDoBlur = true;
CUniform<bool> uUnconstrained = false;
CUniform<float> uNormalThreshold = 0.5f;
for (int i = 0; i < BlurPasses; ++ i)
{
CSimpleMeshSceneObject * BlurHObject = new CSimpleMeshSceneObject();
BlurHObject->SetMesh(CGeometryCreator::CreateScreenTriangle());
BlurHObject->SetShader(BlurHShader);
BlurHObject->SetTexture("uTexture", PingColor);
BlurHObject->SetTexture("tSceneNormals", SceneNormal);
BlurHObject->SetUniform("uDoBlur", uDoBlur);
BlurHObject->SetUniform("uUnconstrained", uUnconstrained);
BlurHObject->SetUniform("uNormalThreshold", uNormalThreshold);
BlurHPasses[i]->AddSceneObject(BlurHObject);
CSimpleMeshSceneObject * BlurVObject = new CSimpleMeshSceneObject();
BlurVObject->SetMesh(CGeometryCreator::CreateScreenTriangle());
BlurVObject->SetShader(BlurVShader);
BlurVObject->SetTexture("uTexture", PongColor);
BlurVObject->SetTexture("tSceneNormals", SceneNormal);
BlurVObject->SetUniform("uDoBlur", uDoBlur);
BlurVObject->SetUniform("uUnconstrained", uUnconstrained);
BlurVObject->SetUniform("uNormalThreshold", uNormalThreshold);
BlurVPasses[i]->AddSceneObject(BlurVObject);
}
CPointLight * Light1 = new CPointLight();
Light1->SetPosition(vec3f(0, 6, 0));
RenderPass->AddLight(Light1);
///////////////
// Main Loop //
///////////////
TimeManager->Init(WindowManager);
while (WindowManager->Run())
{
TimeManager->Update();
GUIManager->NewFrame();
ImGui::SetNextWindowPos(ImVec2(10, 10), ImGuiSetCond_Once);
if (ImGui::Begin("Settings"))
{
ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
ImGui::Text("Camera position: %.3f %.3f %.3f", Camera->GetPosition().X, Camera->GetPosition().Y, Camera->GetPosition().Z);
ImGui::Text("Camera rotation: %.3f %.3f", Controller->GetTheta(), Controller->GetPhi());
ImGui::Separator();
ImGui::SliderFloat("SSAO Radius", &SSAORadius, 0.1f, 20.f);
ImGui::Checkbox("Do Blur", &uDoBlur.Get());
ImGui::SameLine();
ImGui::Checkbox("Unconstrained", &uUnconstrained.Get());
ImGui::SliderFloat("Normal Threshold", &uNormalThreshold.Get(), -1.f, 1.f);
ImGui::End();
}
SceneFrameBuffer->ClearColorAndDepth();
BackBuffer->ClearColorAndDepth();
SceneManager->DrawAll();
GUIManager->Draw();
Window->SwapBuffers();
}
return 0;
}
int main()
{
////////////////////
// ionEngine Init //
////////////////////
Log::AddDefaultOutputs();
SingletonPointer<CGraphicsAPI> GraphicsAPI;
SingletonPointer<CWindowManager> WindowManager;
SingletonPointer<CTimeManager> TimeManager;
SingletonPointer<CSceneManager> SceneManager;
SingletonPointer<CAssetManager> AssetManager;
GraphicsAPI->Init(new Graphics::COpenGLImplementation());
WindowManager->Init(GraphicsAPI);
TimeManager->Init(WindowManager);
SceneManager->Init(GraphicsAPI);
AssetManager->Init(GraphicsAPI);
CWindow * Window = WindowManager->CreateWindow(vec2i(1600, 900), "DemoApplication", EWindowType::Windowed);
AssetManager->SetAssetPath("Assets/");
AssetManager->SetShaderPath("Shaders/");
AssetManager->SetTexturePath("Images/");
SharedPointer<IGraphicsContext> Context = GraphicsAPI->GetWindowContext(Window);
SharedPointer<IRenderTarget> RenderTarget = Context->GetBackBuffer();
RenderTarget->SetClearColor(color3f(0.3f));
/////////////////
// Load Assets //
/////////////////
CSimpleMesh * SphereMesh = CGeometryCreator::CreateSphere();
CSimpleMesh * SkySphereMesh = CGeometryCreator::CreateSkySphere();
CSimpleMesh * PlaneMesh = CGeometryCreator::CreatePlane(vec2f(100.f));
SharedPointer<IShaderProgram> DiffuseShader = AssetManager->LoadShader("Diffuse");
SharedPointer<IShaderProgram> SimpleShader = AssetManager->LoadShader("Simple");
SharedPointer<IShaderProgram> SpecularShader = AssetManager->LoadShader("Specular");
SharedPointer<IShaderProgram> SkySphereShader = AssetManager->LoadShader("SkySphere");
SharedPointer<ITexture2D> SkyMap = AssetManager->LoadTexture("SkyMap.jpg");
SkyMap->SetMagFilter(ITexture::EFilter::Nearest);
////////////////////
// ionScene Setup //
////////////////////
CRenderPass * RenderPass = new CRenderPass(Context);
RenderPass->SetRenderTarget(RenderTarget);
SceneManager->AddRenderPass(RenderPass);
CPerspectiveCamera * Camera = new CPerspectiveCamera(Window->GetAspectRatio());
Camera->SetPosition(vec3f(0, 3, -5));
Camera->SetFocalLength(0.4f);
RenderPass->SetActiveCamera(Camera);
CCameraController * Controller = new CCameraController(Camera);
Controller->SetTheta(15.f * Constants32::Pi / 48.f);
Controller->SetPhi(-Constants32::Pi / 16.f);
Window->AddListener(Controller);
TimeManager->MakeUpdateTick(0.02)->AddListener(Controller);
/////////////////
// Add Objects //
/////////////////
CSimpleMeshSceneObject * LightSphere1 = new CSimpleMeshSceneObject();
LightSphere1->SetMesh(SphereMesh);
LightSphere1->SetShader(SimpleShader);
LightSphere1->SetPosition(vec3f(0, 1, 0));
RenderPass->AddSceneObject(LightSphere1);
CSimpleMeshSceneObject * LightSphere2 = new CSimpleMeshSceneObject();
LightSphere2->SetMesh(SphereMesh);
LightSphere2->SetShader(SimpleShader);
LightSphere2->SetPosition(vec3f(4, 2, 0));
RenderPass->AddSceneObject(LightSphere2);
CSimpleMeshSceneObject * LightSphere3 = new CSimpleMeshSceneObject();
LightSphere3->SetMesh(SphereMesh);
LightSphere3->SetShader(SimpleShader);
LightSphere3->SetPosition(vec3f(12, 3, 0));
RenderPass->AddSceneObject(LightSphere3);
CSimpleMeshSceneObject * SpecularSphere = new CSimpleMeshSceneObject();
SpecularSphere->SetMesh(SphereMesh);
SpecularSphere->SetShader(SpecularShader);
SpecularSphere->SetPosition(vec3f(3, 3, 6));
SpecularSphere->GetMaterial().Ambient = vec3f(0.05f);
RenderPass->AddSceneObject(SpecularSphere);
CSimpleMeshSceneObject * PlaneObject = new CSimpleMeshSceneObject();
PlaneObject->SetMesh(PlaneMesh);
PlaneObject->SetShader(DiffuseShader);
PlaneObject->GetMaterial().Ambient = vec3f(0.05f);
RenderPass->AddSceneObject(PlaneObject);
CSimpleMeshSceneObject * SkySphereObject = new CSimpleMeshSceneObject();
SkySphereObject->SetMesh(SkySphereMesh);
SkySphereObject->SetShader(SkySphereShader);
SkySphereObject->SetTexture("uTexture", SkyMap);
RenderPass->AddSceneObject(SkySphereObject);
CPointLight * Light1 = new CPointLight();
Light1->SetPosition(vec3f(0, 1, 0));
Light1->SetColor(Colors::Red);
RenderPass->AddLight(Light1);
CPointLight * Light2 = new CPointLight();
Light2->SetPosition(vec3f(4, 2, 0));
Light2->SetColor(Colors::Green);
RenderPass->AddLight(Light2);
CPointLight * Light3 = new CPointLight();
Light3->SetPosition(vec3f(12, 3, 0));
Light3->SetColor(Colors::Blue);
RenderPass->AddLight(Light3);
///////////////
// Main Loop //
///////////////
TimeManager->Init(WindowManager);
while (WindowManager->Run())
{
TimeManager->Update();
float const MinimumBrightness = 0.2f;
float const MaximumBrightness = 1.f - MinimumBrightness;
float const Brightness = (Sin<float>((float) TimeManager->GetRunTime()) / 2.f + 0.5f) * MaximumBrightness + MinimumBrightness;
float const Radius = Brightness * 10.f;
Light1->SetRadius(Radius);
Light2->SetRadius(Radius);
Light3->SetRadius(Radius);
float const Bright = 1;
float const Dim = 0.5f;
LightSphere1->GetMaterial().Diffuse = color3f(Bright, Dim, Dim) * Brightness;
LightSphere2->GetMaterial().Diffuse = color3f(Dim, Bright, Dim) * Brightness;
LightSphere3->GetMaterial().Diffuse = color3f(Dim, Dim, Bright) * Brightness;
LightSphere1->SetScale(Brightness);
LightSphere2->SetScale(Brightness);
LightSphere3->SetScale(Brightness);
SkySphereObject->SetPosition(Camera->GetPosition());
RenderTarget->ClearColorAndDepth();
SceneManager->DrawAll();
Window->SwapBuffers();
}
return 0;
}
