Added multithreading and Scene Toggling

project/src/Renderer.cpp

@@ -5,6 +5,7 @@
 //Project includes
 #include "Renderer.h"
 
+#include <execution>
 #include <iostream>
 
 #include "Maths.h"
@@ -24,7 +25,11 @@ Renderer::Renderer(SDL_Window * pWindow) :
 	m_AspectRatio = (m_Width / float(m_Height)) ;
 	m_pBufferPixels = static_cast<uint32_t*>(m_pBuffer->pixels);
 
+	m_HorizontalIterator.resize(m_Width);
+	m_VerticalIterator.resize(m_Height);
 
+	for (uint32_t i = 0; i < m_Width; i++) m_HorizontalIterator[i] = i;
+	for (uint32_t i = 0; i < m_Height; i++) m_VerticalIterator[i] = i;
 }
 
 void Renderer::Render(Scene* pScene) const
@@ -35,16 +40,18 @@ void Renderer::Render(Scene* pScene) const
 
 	const Matrix cameraToWorld = camera.CalculateCameraToWorld();
 	 
-	for (int px{}; px < m_Width; ++px)
-	{
-		for (int py{}; py < m_Height; ++py)
-		{
 
+	if (m_IsMultiThreadingEnabled)
+	{
+		std::for_each(std::execution::par ,m_HorizontalIterator.begin(), m_HorizontalIterator.end(), [this, camera, cameraToWorld, materials, lights, pScene](uint32_t px)
+			{
+				std::for_each(std::execution::par,m_VerticalIterator.begin(), m_VerticalIterator.end(), [this, px, camera, cameraToWorld, materials, lights, pScene](uint32_t py)
+					{
 						//Sets screen to black
 						ColorRGB finalColor{ };
 
 						//creates a vector that holds a coordinate in 3D space dependent on which pixel the loop is on
-			Vector3 rayDirection{ float((2 * ((px + 0.5) / m_Width) - 1) * m_AspectRatio * camera.FOV),float((1 - 2 * ((py + 0.5) / m_Height)) * camera.FOV),1};
+						Vector3 rayDirection{ float((2 * ((px + 0.5) / m_Width) - 1) * m_AspectRatio * camera.FOV),float((1 - 2 * ((py + 0.5) / m_Height)) * camera.FOV),1 };
 						rayDirection.Normalize();
 						rayDirection = cameraToWorld.TransformVector(rayDirection);
 
@@ -87,7 +94,7 @@ void Renderer::Render(Scene* pScene) const
 
 										if (m_CurrentLightingMode == LightingMode::Combined)
 										{
-								ColorRGB ObservedArea = ColorRGB{ observedArea, observedArea,observedArea};
+											ColorRGB ObservedArea = ColorRGB{ observedArea, observedArea,observedArea };
 
 											ColorRGB Radiance = LightUtils::GetRadiance(lights[idx], closestHit.origin);
 
@@ -115,6 +122,90 @@ void Renderer::Render(Scene* pScene) const
 							static_cast<uint8_t>(finalColor.r * 255),
 							static_cast<uint8_t>(finalColor.g * 255),
 							static_cast<uint8_t>(finalColor.b * 255));
+					});
+			});
+	}
+
+	else
+	{
+		for (int px{}; px < m_Width; ++px)
+		{
+			for (int py{}; py < m_Height; ++py)
+			{
+				//Sets screen to black
+				ColorRGB finalColor{ };
+
+				//creates a vector that holds a coordinate in 3D space dependent on which pixel the loop is on
+				Vector3 rayDirection{ float((2 * ((px + 0.5) / m_Width) - 1) * m_AspectRatio * camera.FOV),float((1 - 2 * ((py + 0.5) / m_Height)) * camera.FOV),1 };
+				rayDirection.Normalize();
+				rayDirection = cameraToWorld.TransformVector(rayDirection);
+
+				//Creates a Ray from origin to the point where the current pixel in loop is
+				Ray viewRay{ camera.origin,rayDirection };
+
+				HitRecord closestHit{};
+				pScene->GetClosestHit(viewRay, closestHit);
+
+				if (closestHit.didHit)
+				{
+
+					for (int idx{ 0 }; idx < lights.size(); idx++)
+					{
+						Vector3 lightVec = LightUtils::GetDirectionToLight(lights[idx], closestHit.origin);
+						float maxRayLenght = lightVec.Normalize();
+						Ray shadowRay(closestHit.origin + closestHit.normal * 0.0001f, lightVec, 0.0001f, maxRayLenght);
+						bool shadowDoesHit = pScene->DoesHit(shadowRay);
+						float observedArea = Vector3::Dot(closestHit.normal, lightVec);
+
+						if (observedArea > 0.f)
+						{
+
+							if (!m_ShadowsEnabled or (m_ShadowsEnabled && !shadowDoesHit))
+							{
+								if (m_CurrentLightingMode == LightingMode::ObservedArea)
+								{
+									finalColor += ColorRGB{ observedArea,observedArea,observedArea };
+								}
+
+								if (m_CurrentLightingMode == LightingMode::Radiance)
+								{
+									finalColor += LightUtils::GetRadiance(lights[idx], closestHit.origin);
+								}
+
+								if (m_CurrentLightingMode == LightingMode::BRDF)
+								{
+									finalColor += materials[closestHit.materialIndex]->Shade(closestHit, lightVec, viewRay.direction);
+								}
+
+								if (m_CurrentLightingMode == LightingMode::Combined)
+								{
+									ColorRGB ObservedArea = ColorRGB{ observedArea, observedArea,observedArea };
+
+									ColorRGB Radiance = LightUtils::GetRadiance(lights[idx], closestHit.origin);
+
+									ColorRGB BRDF = materials[closestHit.materialIndex]->Shade(closestHit, lightVec, viewRay.direction);
+
+									finalColor += Radiance * BRDF * ObservedArea;
+								}
+
+							}
+						}
+
+					}
+					//const float scaled_t = (closestHit.t - 50.f) / 40.f; //shades spheres based on proximity
+					//finalColor = { scaled_t,scaled_t,scaled_t };
+
+					//const float scaled_t = (closestHit.t) / 500.f;    //shades planes based on proximity
+					//finalColor = { scaled_t,scaled_t,scaled_t };
+				}
+				//Update Color in Buffer
+				finalColor.MaxToOne();
+
+				m_pBufferPixels[px + (py * m_Width)] = SDL_MapRGB(m_pBuffer->format,
+					static_cast<uint8_t>(finalColor.r * 255),
+					static_cast<uint8_t>(finalColor.g * 255),
+					static_cast<uint8_t>(finalColor.b * 255));
+			}
 		}
 	}
 

project/src/Renderer.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <cstdint>
+#include <vector>
 
 struct SDL_Window;
 struct SDL_Surface;
@@ -39,6 +40,8 @@ namespace dae
 			
 		};
 		void ToggleShadows() { m_ShadowsEnabled = !m_ShadowsEnabled; }
+		void ToggleMultiThreading() { m_IsMultiThreadingEnabled = !m_IsMultiThreadingEnabled; }
+
 
 	private:
 
@@ -52,6 +55,7 @@ namespace dae
 
 		LightingMode m_CurrentLightingMode{LightingMode::Combined};
 		bool m_ShadowsEnabled{true};
+		bool m_IsMultiThreadingEnabled{ true };
 		SDL_Window* m_pWindow{};
 
 		SDL_Surface* m_pBuffer{};
@@ -60,5 +64,7 @@ namespace dae
 		int m_Width{};
 		int m_Height{};
 		float m_AspectRatio{};
+
+		std::vector<uint32_t> m_HorizontalIterator, m_VerticalIterator;
 	};
 }

project/src/Scene.cpp

@@ -325,7 +325,7 @@ namespace dae {
 	}
 
 
-	void Scene_W4::Initialize()
+	void Scene_W4_Bunny::Initialize()
 	{
 		m_Camera.origin = { 0.f, 1.f, -5.f };
 		m_Camera.fovAngle = 45.f;
@@ -366,7 +366,7 @@ namespace dae {
 
 
 		pMesh = AddTriangleMesh(TriangleCullMode::BackFaceCulling, matLambert_White);
-		Utils::ParseOBJ("Resources/Warlock.obj", 
+		Utils::ParseOBJ("Resources/lowpoly_bunny.obj", 
 						pMesh->positions,
 						pMesh->normals,
 						pMesh->indices);
@@ -382,18 +382,18 @@ namespace dae {
 
 		//pMesh->CalculateNormals();
 		//pMesh->Translate({ 0.f,1.5f,0.f });
-		pMesh->RotateY(90);
+		pMesh->RotateY(60);
 		pMesh->UpdateTransforms();
 
 
 
 		// Light
 		AddPointLight({ 0.f, 5.f, 5.f }, 50.f, ColorRGB{ 1.f, .61f, .45f });  // Backlight
-		//AddPointLight({ -2.5f, 5.f, -5.f }, 70.f, ColorRGB{ 1.f, .8f, .45f }); // Front Light Left
+		AddPointLight({ -2.5f, 5.f, -5.f }, 70.f, ColorRGB{ 1.f, .8f, .45f }); // Front Light Left
-		//AddPointLight({ 2.5f, 5.f, -5.f }, 50.f, ColorRGB{ .34f, .47f, .68f }); // Front Light Right
+		AddPointLight({ 2.5f, 5.f, -5.f }, 50.f, ColorRGB{ .34f, .47f, .68f }); // Front Light Right
 	}
 
-	void Scene_W4::Update(dae::Timer* pTimer)
+	void Scene_W4_Bunny::Update(dae::Timer* pTimer)
 	{
 		Scene::Update(pTimer);
 	}

project/src/Scene.h

@@ -112,17 +112,17 @@ namespace dae
 		void Initialize() override;
 	};
 
-	//WEEK 4 Test Scene
+	//WEEK 4 Bunny Scene
-	class Scene_W4 final : public Scene
+	class Scene_W4_Bunny final : public Scene
 	{
 	public:
-		Scene_W4() = default;
+		Scene_W4_Bunny() = default;
-		~Scene_W4() override = default;
+		~Scene_W4_Bunny() override = default;
 
-		Scene_W4(const Scene_W4&) = delete;
+		Scene_W4_Bunny(const Scene_W4_Bunny&) = delete;
-		Scene_W4(Scene_W4&&) noexcept = delete;
+		Scene_W4_Bunny(Scene_W4_Bunny&&) noexcept = delete;
-		Scene_W4& operator=(const Scene_W4&) = delete;
+		Scene_W4_Bunny& operator=(const Scene_W4_Bunny&) = delete;
-		Scene_W4& operator=(Scene_W4&&) noexcept = delete;
+		Scene_W4_Bunny& operator=(Scene_W4_Bunny&&) noexcept = delete;
 
 		void Initialize() override;
 		void Update(dae::Timer* pTimer) override;
@@ -132,7 +132,7 @@ namespace dae
 	};
 
 
-	//WEEK 4 Test Scene
+	//WEEK 4 Reference Scene
 	class Scene_W4_ReferenceScene final : public Scene
 	{
 	public:

project/src/main.cpp

@@ -48,7 +48,9 @@ int main(int argc, char* args[])
 	const auto pRenderer = new Renderer(pWindow);
 
 	const auto pScene = new Scene_W4_ReferenceScene();
+	const auto pScene2 = new Scene_W4_Bunny();
 	pScene->Initialize();
+	pScene2->Initialize();
 
 
 	//Start loop
@@ -60,6 +62,7 @@ int main(int argc, char* args[])
 	float printTimer = 0.f;
 	bool isLooping = true;
 	bool takeScreenshot = false;
+	bool isBunnyScene = false;
 	while (isLooping)
 	{
 		//--------- Get input events ---------
@@ -82,6 +85,14 @@ int main(int argc, char* args[])
 				{
 					pRenderer->CycleLightingMode();
 				}
+				if (e.key.keysym.scancode == SDL_SCANCODE_F4)
+				{
+					pRenderer->ToggleMultiThreading();
+				}
+				if (e.key.keysym.scancode == SDL_SCANCODE_F5)
+				{
+					isBunnyScene = !isBunnyScene;
+				}
 				break;
 			}
 
@@ -91,10 +102,26 @@ int main(int argc, char* args[])
 
 
 		//--------- Update ---------
+		if (isBunnyScene)
+		{
+			pScene2->Update(pTimer);
+		}
+		else
+		{
 			pScene->Update(pTimer);
+		}
+	
 
 		//--------- Render ---------
+		if (isBunnyScene)
+		{
+			pRenderer->Render(pScene2);
+		}
+		else
+		{
 			pRenderer->Render(pScene);
+		}
+		
 
 		//--------- Timer ---------
 		pTimer->Update();
@@ -119,6 +146,7 @@ int main(int argc, char* args[])
 
 	//Shutdown "framework"
 	delete pScene;
+	delete pScene2;
 	delete pRenderer;
 	delete pTimer;