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;
SingletonPointer<CGUIManager> GUIManager;
GraphicsAPI->Init(new COpenGLImplementation());
WindowManager->Init(GraphicsAPI);
TimeManager->Init(WindowManager);
SceneManager->Init(GraphicsAPI);
AssetManager->Init(GraphicsAPI);
CWindow * Window = WindowManager->CreateWindow(vec2i(1920, 1080), "Shadow Maps", EWindowType::Windowed);
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> ShadowBuffer = Context->CreateFrameBuffer();
SharedPointer<ITexture2D> ShadowTexture = GraphicsAPI->CreateTexture2D(vec2i(4096), ITexture::EMipMaps::False, ITexture::EFormatComponents::RGBA, ITexture::EInternalFormatType::Fix8);
SharedPointer<ITexture2D> ShadowDepth = GraphicsAPI->CreateTexture2D(vec2i(4096), ITexture::EMipMaps::False, ITexture::EFormatComponents::R, ITexture::EInternalFormatType::Depth);
ShadowBuffer->AttachColorTexture(ShadowTexture, 0);
ShadowBuffer->AttachDepthTexture(ShadowDepth);
if (! ShadowBuffer->CheckCorrectness())
{
Log::Error("Frame buffer not valid!");
}
/////////////////
// Load Assets //
/////////////////
CSimpleMesh * SphereMesh = CGeometryCreator::CreateSphere();
CSimpleMesh * PlaneMesh = CGeometryCreator::CreatePlane(vec2f(100.f));
CSimpleMesh * CubeMesh = CGeometryCreator::CreateCube();
SharedPointer<IShader> DiffuseShader = AssetManager->LoadShader("Diffuse");
SharedPointer<IShader> ColorShader = AssetManager->LoadShader("Color");
SharedPointer<IShader> QuadCopyShader = AssetManager->LoadShader("QuadCopy");
////////////////////
// ionScene Setup //
////////////////////
CRenderPass * ShadowPass = new CRenderPass(Context);
ShadowPass->SetRenderTarget(ShadowBuffer);
SceneManager->AddRenderPass(ShadowPass);
CRenderPass * ColorPass = new CRenderPass(Context);
ColorPass->SetRenderTarget(BackBuffer);
SceneManager->AddRenderPass(ColorPass);
CRenderPass * PostProcess = new CRenderPass(Context);
PostProcess->SetRenderTarget(BackBuffer);
SceneManager->AddRenderPass(PostProcess);
CPerspectiveCamera * Camera = new CPerspectiveCamera(Window->GetAspectRatio());
Camera->SetPosition(vec3f(15.25f, 7.3f, -11.85f));
Camera->SetFocalLength(0.4f);
Camera->SetFarPlane(1000.f);
ColorPass->SetActiveCamera(Camera);
CCameraController * Controller = new CCameraController(Camera);
Controller->SetTheta(2.347f);
Controller->SetPhi(-0.326f);
Window->AddListener(Controller);
TimeManager->MakeUpdateTick(0.02)->AddListener(Controller);
COrthographicCamera * LightCamera = new COrthographicCamera(-1, 1, -1, 1);
ShadowPass->SetActiveCamera(LightCamera);
/////////////////
// Add Objects //
/////////////////
CSimpleMeshSceneObject * Sphere1 = new CSimpleMeshSceneObject();
Sphere1->SetMesh(SphereMesh);
Sphere1->SetShader(DiffuseShader);
Sphere1->SetPosition(vec3f(0, 1, 0));
Sphere1->SetScale(2.f);
ColorPass->AddSceneObject(Sphere1);
ShadowPass->AddSceneObject(Sphere1);
CSimpleMeshSceneObject * Sphere2 = new CSimpleMeshSceneObject();
Sphere2->SetMesh(SphereMesh);
Sphere2->SetShader(DiffuseShader);
Sphere2->SetPosition(vec3f(4, 4, 0));
Sphere2->SetScale(3.f);
Sphere2->GetMaterial().Ambient *= Color::Basic::Yellow;
Sphere2->GetMaterial().Diffuse *= Color::Basic::Yellow;
ColorPass->AddSceneObject(Sphere2);
ShadowPass->AddSceneObject(Sphere2);
CSimpleMeshSceneObject * Sphere3 = new CSimpleMeshSceneObject();
Sphere3->SetMesh(SphereMesh);
Sphere3->SetShader(DiffuseShader);
Sphere3->SetPosition(vec3f(12, 2, 0));
Sphere3->SetScale(4.f);
ColorPass->AddSceneObject(Sphere3);
ShadowPass->AddSceneObject(Sphere3);
CSimpleMeshSceneObject * Sphere4 = new CSimpleMeshSceneObject();
Sphere4->SetMesh(SphereMesh);
Sphere4->SetShader(DiffuseShader);
Sphere4->SetPosition(vec3f(3, 4, 6));
Sphere4->GetMaterial().Ambient *= Color::Basic::Red;
Sphere4->GetMaterial().Diffuse *= Color::Basic::Red;
ColorPass->AddSceneObject(Sphere4);
ShadowPass->AddSceneObject(Sphere4);
CSimpleMeshSceneObject * Cube1 = new CSimpleMeshSceneObject();
Cube1->SetMesh(CubeMesh);
Cube1->SetShader(DiffuseShader);
Cube1->SetPosition(vec3f(-4, 4, 0));
Cube1->SetScale(3.f);
Cube1->GetMaterial().Ambient *= Color::Basic::Cyan;
Cube1->GetMaterial().Diffuse *= Color::Basic::Cyan;
ColorPass->AddSceneObject(Cube1);
ShadowPass->AddSceneObject(Cube1);
CSimpleMeshSceneObject * Cube2 = new CSimpleMeshSceneObject();
Cube2->SetMesh(CubeMesh);
Cube2->SetShader(DiffuseShader);
Cube2->SetPosition(vec3f(-12, 2, 0));
Cube2->SetScale(4.f);
Cube2->GetMaterial().Ambient *= Color::Basic::Blue;
Cube2->GetMaterial().Diffuse *= Color::Basic::Blue;
ColorPass->AddSceneObject(Cube2);
ShadowPass->AddSceneObject(Cube2);
CSimpleMeshSceneObject * Plane = new CSimpleMeshSceneObject();
Plane->SetMesh(PlaneMesh);
Plane->SetShader(DiffuseShader);
Plane->GetMaterial().Ambient *= Color::Basic::Green;
Plane->GetMaterial().Diffuse *= Color::Basic::Green;
ColorPass->AddSceneObject(Plane);
ShadowPass->AddSceneObject(Plane);
vector<CSimpleMesh *> Meshes = CGeometryCreator::LoadOBJFile("bunny.obj");
for (auto Mesh : Meshes)
{
CSimpleMeshSceneObject * PlaneObject = new CSimpleMeshSceneObject();
PlaneObject->SetMesh(Mesh);
PlaneObject->SetShader(DiffuseShader);
PlaneObject->SetPosition(vec3f(3, -1.f, -6));
PlaneObject->SetScale(vec3f(2.5f));
PlaneObject->SetRotation(vec3f(0, 3.14f / 4.f, 0));
ColorPass->AddSceneObject(PlaneObject);
ShadowPass->AddSceneObject(PlaneObject);
}
CLineSceneObject * Lines = new CLineSceneObject();
Lines->SetShader(ColorShader);
ColorPass->AddSceneObject(Lines);
CSimpleMeshSceneObject * PostProcessObject = new CSimpleMeshSceneObject();
PostProcessObject->SetMesh(CreateScreenQuad());
PostProcessObject->SetShader(QuadCopyShader);
PostProcessObject->SetTexture("uTexture", ShadowDepth);
PostProcess->AddSceneObject(PostProcessObject);
CDirectionalLight * Light1 = new CDirectionalLight();
ColorPass->AddLight(Light1);
ShadowPass->AddLight(Light1);
CSimpleMeshSceneObject * LightSphere = new CSimpleMeshSceneObject();
LightSphere->SetMesh(SphereMesh);
LightSphere->SetShader(DiffuseShader);
LightSphere->SetScale(0.4f);
LightSphere->GetMaterial().Ambient = 1.f / 0.75f;
LightSphere->GetMaterial().Diffuse = 0;
ColorPass->AddSceneObject(LightSphere);
CUniform<bool> uDebugShadows = false;
CUniform<float> uShadowBias = 0.005f;
CUniform<glm::mat4> uLightMatrix;
ColorPass->SetUniform("uLightMatrix", uLightMatrix);
ColorPass->SetUniform("uDebugShadows", uDebugShadows);
ColorPass->SetUniform("uShadowBias", uShadowBias);
ColorPass->SetTexture("uShadowMap", ShadowDepth);
// Obviously the shadow pass does not need these, but this will suppress warnings
// An object that supports different shaders for different passes is needed
ShadowPass->SetUniform("uLightMatrix", uLightMatrix);
ShadowPass->SetUniform("uDebugShadows", uDebugShadows);
ShadowPass->SetUniform("uShadowBias", uShadowBias);
ShadowPass->SetTexture("uShadowMap", ShadowDepth);
///////////////
// Main Loop //
///////////////
vec3f LightDirection = Normalize( vec3f(2, -12, 2) );
float LightViewSize = 20.f;
float LightNear = 1.f;
float LightFar = 30.f;
float LightDistance = 15.f;
TimeManager->Init(WindowManager);
while (WindowManager->Run())
{
TimeManager->Update();
PostProcessObject->SetVisible(Window->IsKeyDown(EKey::F1));
GUIManager->NewFrame();
ImGui::SetNextWindowPos(ImVec2(10, 10), ImGuiSetCond_Once);
ImGui::SetNextWindowSize(ImVec2(400, 300), 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("Light Camera Size", &LightViewSize, 1.f, 200.f);
ImGui::SliderFloat("Light Near Plane", &LightNear, 1.f, 300.f);
ImGui::SliderFloat("Light Far Plane", &LightFar, 1.f, 600.f);
ImGui::SliderFloat("Light Camera Distance", &LightDistance, 1.f, 200.f);
ImGui::Text("Light Position: %.3f %.3f %.3f", LightCamera->GetPosition().X, LightCamera->GetPosition().Y, LightCamera->GetPosition().Z);
ImGui::Separator();
ImGui::Checkbox("Debug Shadows", &uDebugShadows.Get());
ImGui::SliderFloat("Shadow Bias", &uShadowBias.Get(), 0.0f, 0.5f, "%.6f", 2.f);
}
ImGui::End();
ImGui::SetNextWindowPos(vec2f(600, 10), ImGuiSetCond_Once);
ImGui::SetNextWindowSize(vec2f(300), ImGuiSetCond_Once);
if (ImGui::Begin("Shadow Map"))
{
vec2f const AvailableSpace = ImGui::GetContentRegionAvail();
ImGui::Image(GUIManager->GetTextureID(ShadowDepth), AvailableSpace);
}
ImGui::End();
Light1->SetDirection(LightDirection);
LightSphere->SetPosition(LightDirection * LightDistance);
LightCamera->SetLeft(-LightViewSize);
LightCamera->SetRight(LightViewSize);
LightCamera->SetBottom(-LightViewSize);
LightCamera->SetTop(LightViewSize);
LightCamera->SetPosition(-LightDirection * LightDistance);
LightCamera->SetLookDirection(LightDirection);
LightCamera->SetNearPlane(LightNear);
LightCamera->SetFarPlane(LightFar);
LightCamera->Update();
uLightMatrix = LightCamera->GetProjectionMatrix() * LightCamera->GetViewMatrix();
vec3f const W = - Normalize(LightCamera->GetLookDirecton());
vec3f const U = Normalize(Cross(LightCamera->GetUpVector(), W));
vec3f const V = Cross(W, U);
vec3f const P = LightCamera->GetPosition();
vec3f Box[8];
float const BoxSize = LightViewSize;
Box[0] = P - U * BoxSize - V * BoxSize - W * LightNear;
Box[1] = P + U * BoxSize - V * BoxSize - W * LightNear;
Box[2] = P - U * BoxSize + V * BoxSize - W * LightNear;
Box[3] = P + U * BoxSize + V * BoxSize - W * LightNear;
Box[4] = P - U * BoxSize - V * BoxSize - W * LightFar;
Box[5] = P + U * BoxSize - V * BoxSize - W * LightFar;
Box[6] = P - U * BoxSize + V * BoxSize - W * LightFar;
Box[7] = P + U * BoxSize + V * BoxSize - W * LightFar;
Lines->ResetLines();
Lines->AddLine(vec3f(0, 0, 0), P, Color::Basic::Cyan);
Lines->AddLine(P, P + U, Color::Basic::Red);
Lines->AddLine(P, P + V, Color::Basic::Green);
Lines->AddLine(P, P + W, Color::Basic::Blue);
Lines->AddLine(Box[0], Box[1], Color::Basic::White);
Lines->AddLine(Box[0], Box[2], Color::Basic::White);
Lines->AddLine(Box[1], Box[3], Color::Basic::White);
Lines->AddLine(Box[2], Box[3], Color::Basic::White);
Lines->AddLine(Box[4], Box[5], Color::Basic::White);
Lines->AddLine(Box[4], Box[6], Color::Basic::White);
Lines->AddLine(Box[5], Box[7], Color::Basic::White);
Lines->AddLine(Box[6], Box[7], Color::Basic::White);
Lines->AddLine(Box[0], Box[4], Color::Basic::White);
Lines->AddLine(Box[1], Box[5], Color::Basic::White);
Lines->AddLine(Box[2], Box[6], Color::Basic::White);
Lines->AddLine(Box[3], Box[7], Color::Basic::White);
//Lines->AddLine(vec3f(0, 0, 0), vec3f(0, 10, 0), Color::Basic::Blue);
ShadowBuffer->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;
SingletonPointer<CGUIManager> GUIManager;
GraphicsAPI->Init(new COpenGLImplementation());
WindowManager->Init(GraphicsAPI);
TimeManager->Init(WindowManager);
SceneManager->Init(GraphicsAPI);
AssetManager->Init(GraphicsAPI);
CWindow * Window = WindowManager->CreateWindow(vec2i(1600, 900), "Shadow Maps", EWindowType::Windowed);
GUIManager->Init(Window);
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> ShadowBuffer = Context->CreateFrameBuffer();
SharedPointer<ITexture2D> ShadowTexture = GraphicsAPI->CreateTexture2D(vec2u(4096), ITexture::EMipMaps::False, ITexture::EFormatComponents::RGBA, ITexture::EInternalFormatType::Fix8);
SharedPointer<ITexture2D> ShadowDepth = GraphicsAPI->CreateTexture2D(vec2u(4096), ITexture::EMipMaps::False, ITexture::EFormatComponents::R, ITexture::EInternalFormatType::Depth);
ShadowBuffer->AttachColorTexture(ShadowTexture, 0);
ShadowBuffer->AttachDepthTexture(ShadowDepth);
if (! ShadowBuffer->CheckCorrectness())
{
Log::Error("Frame buffer not valid!");
}
/////////////////
// Load Assets //
/////////////////
CSimpleMesh * SphereMesh = CGeometryCreator::CreateSphere();
CSimpleMesh * PlaneMesh = CGeometryCreator::CreatePlane(vec2f(100.f));
CSimpleMesh * CubeMesh = CGeometryCreator::CreateCube();
SharedPointer<IShaderProgram> DiffuseShader = AssetManager->LoadShader("Diffuse");
SharedPointer<IShaderProgram> QuadCopyShader = AssetManager->LoadShader("QuadCopy");
////////////////////
// ionScene Setup //
////////////////////
CRenderPass * ShadowPass = new CRenderPass(Context);
ShadowPass->SetRenderTarget(ShadowBuffer);
SceneManager->AddRenderPass(ShadowPass);
CRenderPass * ColorPass = new CRenderPass(Context);
ColorPass->SetRenderTarget(BackBuffer);
SceneManager->AddRenderPass(ColorPass);
CRenderPass * PostProcess = new CRenderPass(Context);
PostProcess->SetRenderTarget(BackBuffer);
SceneManager->AddRenderPass(PostProcess);
CPerspectiveCamera * Camera = new CPerspectiveCamera(Window->GetAspectRatio());
Camera->SetPosition(vec3f(0, 3, -5));
Camera->SetFocalLength(0.4f);
ColorPass->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);
vec3f LightDirection = vec3f(2, -12, 2);
float LightViewSize = 20.f;
float LightNear = 50.f;
float LightFar = 200.f;
COrthographicCamera * LightCamera = new COrthographicCamera(-LightViewSize, LightViewSize, -LightViewSize, LightViewSize);
LightCamera->SetPosition(-LightDirection * 10.f);
LightCamera->SetLookDirection(LightDirection);
LightCamera->SetNearPlane(LightNear);
LightCamera->SetFarPlane(LightFar);
ShadowPass->SetActiveCamera(LightCamera);
/////////////////
// Add Objects //
/////////////////
CSimpleMeshSceneObject * Sphere1 = new CSimpleMeshSceneObject();
Sphere1->SetMesh(SphereMesh);
Sphere1->SetShader(DiffuseShader);
Sphere1->SetPosition(vec3f(0, 1, 0));
Sphere1->SetScale(2.f);
ColorPass->AddSceneObject(Sphere1);
ShadowPass->AddSceneObject(Sphere1);
CSimpleMeshSceneObject * Sphere2 = new CSimpleMeshSceneObject();
Sphere2->SetMesh(SphereMesh);
Sphere2->SetShader(DiffuseShader);
Sphere2->SetPosition(vec3f(4, 4, 0));
Sphere2->SetScale(3.f);
ColorPass->AddSceneObject(Sphere2);
ShadowPass->AddSceneObject(Sphere2);
CSimpleMeshSceneObject * Sphere3 = new CSimpleMeshSceneObject();
Sphere3->SetMesh(SphereMesh);
Sphere3->SetShader(DiffuseShader);
Sphere3->SetPosition(vec3f(12, 2, 0));
Sphere3->SetScale(4.f);
ColorPass->AddSceneObject(Sphere3);
ShadowPass->AddSceneObject(Sphere3);
CSimpleMeshSceneObject * Sphere4 = new CSimpleMeshSceneObject();
Sphere4->SetMesh(SphereMesh);
Sphere4->SetShader(DiffuseShader);
Sphere4->SetPosition(vec3f(3, 4, 6));
ColorPass->AddSceneObject(Sphere4);
ShadowPass->AddSceneObject(Sphere4);
CSimpleMeshSceneObject * Cube1 = new CSimpleMeshSceneObject();
Cube1->SetMesh(CubeMesh);
Cube1->SetShader(DiffuseShader);
Cube1->SetPosition(vec3f(-4, 4, 0));
Cube1->SetScale(3.f);
ColorPass->AddSceneObject(Cube1);
ShadowPass->AddSceneObject(Cube1);
CSimpleMeshSceneObject * Cube2 = new CSimpleMeshSceneObject();
Cube2->SetMesh(CubeMesh);
Cube2->SetShader(DiffuseShader);
Cube2->SetPosition(vec3f(-12, 2, 0));
Cube2->SetScale(4.f);
ColorPass->AddSceneObject(Cube2);
ShadowPass->AddSceneObject(Cube2);
CSimpleMeshSceneObject * Plane = new CSimpleMeshSceneObject();
Plane->SetMesh(PlaneMesh);
Plane->SetShader(DiffuseShader);
Plane->GetMaterial().Ambient *= Colors::Green;
Plane->GetMaterial().Diffuse *= Colors::Green;
ColorPass->AddSceneObject(Plane);
ShadowPass->AddSceneObject(Plane);
//vector<CSimpleMesh *> Meshes = CGeometryCreator::LoadOBJFile("terrain.obj");
//for (auto Mesh : Meshes)
//{
// CSimpleMeshSceneObject * PlaneObject = new CSimpleMeshSceneObject();
// PlaneObject->SetMesh(Mesh);
// PlaneObject->SetShader(DiffuseShader);
// ColorPass->AddSceneObject(PlaneObject);
// ShadowPass->AddSceneObject(PlaneObject);
//}
CSimpleMeshSceneObject * PostProcessObject = new CSimpleMeshSceneObject();
PostProcessObject->SetMesh(CGeometryCreator::CreateScreenTriangle());
PostProcessObject->SetShader(QuadCopyShader);
PostProcessObject->SetTexture("uTexture", ShadowDepth);
PostProcess->AddSceneObject(PostProcessObject);
CDirectionalLight * Light1 = new CDirectionalLight();
Light1->SetDirection(LightDirection);
ColorPass->AddLight(Light1);
ShadowPass->AddLight(Light1);
CUniform<glm::mat4> uLightMatrix;
ColorPass->SetUniform("uLightMatrix", uLightMatrix);
ColorPass->SetTexture("uShadowMap", ShadowDepth);
///////////////
// Main Loop //
///////////////
TimeManager->Init(WindowManager);
while (WindowManager->Run())
{
TimeManager->Update();
PostProcessObject->SetVisible(Window->IsKeyDown(EKey::F1));
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("Light Camera Size", &LightViewSize, 1.f, 200.f);
ImGui::SliderFloat("Light Near Plane", &LightNear, 1.f, 300.f);
ImGui::SliderFloat("Light Far Plane", &LightFar, 1.f, 600.f);
ImGui::SliderFloat3("Light Direction", LightDirection.Values, -30.f, 30.f);
ImGui::Text("Light Position: %.3f %.3f %.3f", LightCamera->GetPosition().X, LightCamera->GetPosition().Y, LightCamera->GetPosition().Z);
ImGui::End();
}
LightCamera->SetLeft(-LightViewSize);
LightCamera->SetRight(LightViewSize);
LightCamera->SetBottom(-LightViewSize);
LightCamera->SetTop(LightViewSize);
LightCamera->SetPosition(-LightDirection * 10.f);
LightCamera->SetLookDirection(LightDirection);
LightCamera->SetNearPlane(LightNear);
LightCamera->SetFarPlane(LightFar);
uLightMatrix = LightCamera->GetProjectionMatrix() * LightCamera->GetViewMatrix();
ShadowBuffer->ClearColorAndDepth();
BackBuffer->ClearColorAndDepth();
SceneManager->DrawAll();
GUIManager->Draw();
Window->SwapBuffers();
}
return 0;
}