Added new RenderTechnique system

Former-commit-id: 6d65a4537232bc705333c696f2478d47f16e074a

include/Nazara/Graphics/AbstractRenderTechnique.hpp

@@ -9,7 +9,9 @@
 
 #include <Nazara/Prerequesites.hpp>
 #include <Nazara/Core/NonCopyable.hpp>
+#include <Nazara/Core/String.hpp>
 #include <Nazara/Graphics/AbstractRenderQueue.hpp>
+#include <Nazara/Graphics/Enums.hpp>
 
 class NzBackground;
 class NzScene;
@@ -21,11 +23,13 @@ class NAZARA_API NzAbstractRenderTechnique : NzNonCopyable
 		virtual ~NzAbstractRenderTechnique();
 
 		virtual void Clear(const NzScene* scene) = 0;
-		virtual void Draw(const NzScene* scene) = 0;
+		virtual bool Draw(const NzScene* scene) = 0;
 
 		virtual void EnableInstancing(bool instancing);
 
+		virtual NzString GetName() const;
 		virtual NzAbstractRenderQueue* GetRenderQueue() = 0;
+		virtual nzRenderTechniqueType GetType() const = 0;
 
 		virtual bool IsInstancingEnabled() const;
 

include/Nazara/Graphics/Enums.hpp

@@ -26,6 +26,17 @@ enum nzLightType
 	nzLightType_Max = nzLightType_Spot
 };
 
+enum nzRenderTechniqueType
+{
+	nzRenderTechniqueType_AdvancedForward, // NzAdvancedForwardRenderTechnique
+	nzRenderTechniqueType_BasicForward,    // NzBasicForwardRenderTechnique
+	nzRenderTechniqueType_DeferredShading, // NzDeferredRenderTechnique
+	nzRenderTechniqueType_LightPrePass,    // NzLightPrePassRenderTechnique
+	nzRenderTechniqueType_User,
+
+	nzRenderTechniqueType_Max = nzRenderTechniqueType_User
+};
+
 enum nzSceneNodeType
 {
 	nzSceneNodeType_Light,  // NzLight

include/Nazara/Graphics/ForwardRenderTechnique.hpp

@@ -21,10 +21,11 @@ class NAZARA_API NzForwardRenderTechnique : public NzAbstractRenderTechnique
 		~NzForwardRenderTechnique();
 
 		void Clear(const NzScene* scene);
-		void Draw(const NzScene* scene);
+		bool Draw(const NzScene* scene);
 
 		unsigned int GetMaxLightsPerObject() const;
 		NzAbstractRenderQueue* GetRenderQueue() override;
+		nzRenderTechniqueType GetType() const override;
 
 		void SetMaxLightsPerObject(unsigned int lightCount);
 

src/Nazara/Graphics/AbstractRenderTechnique.cpp

@@ -4,6 +4,7 @@
 
 #include <Nazara/Graphics/AbstractRenderTechnique.hpp>
 #include <Nazara/Core/Error.hpp>
+#include <Nazara/Graphics/RenderTechniques.hpp>
 #include <Nazara/Renderer/Renderer.hpp>
 #include <Nazara/Graphics/Debug.hpp>
 
@@ -30,6 +31,11 @@ void NzAbstractRenderTechnique::EnableInstancing(bool instancing)
 		NazaraError("NazaraRenderer does not support instancing");
 }
 
+NzString NzAbstractRenderTechnique::GetName() const
+{
+	return NzRenderTechniques::ToString(GetType());
+}
+
 bool NzAbstractRenderTechnique::IsInstancingEnabled() const
 {
 	return m_instancingEnabled;

src/Nazara/Graphics/ForwardRenderTechnique.cpp

@@ -74,7 +74,7 @@ void NzForwardRenderTechnique::Clear(const NzScene* scene)
 		background->Draw(scene);
 }
 
-void NzForwardRenderTechnique::Draw(const NzScene* scene)
+bool NzForwardRenderTechnique::Draw(const NzScene* scene)
 {
 	m_directionalLights.SetLights(&m_renderQueue.directionalLights[0], m_renderQueue.directionalLights.size());
 	m_lights.SetLights(&m_renderQueue.lights[0], m_renderQueue.lights.size());
@@ -93,6 +93,8 @@ void NzForwardRenderTechnique::Draw(const NzScene* scene)
 	for (const NzDrawable* drawable : m_renderQueue.otherDrawables)
 		drawable->Draw();
 
+	return true;
+
 	// Les billboards
 	/*if (!m_renderQueue.billboards.empty())
 	{
@@ -149,6 +151,11 @@ NzAbstractRenderQueue* NzForwardRenderTechnique::GetRenderQueue()
 	return &m_renderQueue;
 }
 
+nzRenderTechniqueType NzForwardRenderTechnique::GetType() const
+{
+	return nzRenderTechniqueType_BasicForward;
+}
+
 void NzForwardRenderTechnique::SetMaxLightsPerObject(unsigned int lightCount)
 {
 	#if NAZARA_GRAPHICS_SAFE

src/Nazara/Graphics/Graphics.cpp

@@ -6,6 +6,8 @@
 #include <Nazara/Core/Error.hpp>
 #include <Nazara/Core/Log.hpp>
 #include <Nazara/Graphics/Config.hpp>
+#include <Nazara/Graphics/ForwardRenderTechnique.hpp>
+#include <Nazara/Graphics/RenderTechniques.hpp>
 #include <Nazara/Graphics/Loaders/Mesh.hpp>
 #include <Nazara/Graphics/Loaders/OBJ.hpp>
 #include <Nazara/Renderer/Renderer.hpp>
@@ -33,6 +35,9 @@ bool NzGraphics::Initialize()
 	// Loader générique
 	NzLoaders_Mesh_Register();
 
+	// RenderTechniques
+	NzRenderTechniques::Register(NzRenderTechniques::ToString(nzRenderTechniqueType_BasicForward), 0, []() -> NzAbstractRenderTechnique* { return new NzForwardRenderTechnique; });
+
 	NazaraNotice("Initialized: Graphics module");
 
 	return true;

src/Nazara/Graphics/Scene.cpp

@@ -5,9 +5,10 @@
 #include <Nazara/Graphics/Scene.hpp>
 #include <Nazara/Core/Clock.hpp>
 #include <Nazara/Core/Error.hpp>
+#include <Nazara/Core/ErrorFlags.hpp>
 #include <Nazara/Graphics/Camera.hpp>
 #include <Nazara/Graphics/ColorBackground.hpp>
-#include <Nazara/Graphics/ForwardRenderTechnique.hpp>
+#include <Nazara/Graphics/RenderTechniques.hpp>
 #include <Nazara/Graphics/SceneRoot.hpp>
 #include <Nazara/Renderer/Config.hpp>
 #include <functional>
@@ -34,6 +35,7 @@ struct NzSceneImpl
 	bool update;
 	float frameTime;
 	float updateTime;
+	int renderTechniqueRanking;
 	unsigned int updatePerSecond = 60;
 };
 
@@ -41,7 +43,7 @@ NzScene::NzScene()
 {
 	m_impl = new NzSceneImpl(this);
 	m_impl->background.reset(new NzColorBackground);
-	m_impl->renderTechnique.reset(new NzForwardRenderTechnique);
+	m_impl->renderTechnique.reset(NzRenderTechniques::GetByRanking(-1, &m_impl->renderTechniqueRanking));
 }
 
 NzScene::~NzScene()
@@ -94,9 +96,21 @@ void NzScene::Draw()
 	}
 	#endif
 
-	m_impl->renderTechnique->Clear(this);
 	m_impl->viewer->ApplyView();
+
+	try
+	{
+		NzErrorFlags errFlags(nzErrorFlag_ThrowException);
+		m_impl->renderTechnique->Clear(this);
 		m_impl->renderTechnique->Draw(this);
+	}
+	catch (const std::exception& e)
+	{
+		NzString oldName = m_impl->renderTechnique->GetName();
+		m_impl->renderTechnique.reset(NzRenderTechniques::GetByRanking(m_impl->renderTechniqueRanking-1, &m_impl->renderTechniqueRanking));
+		NazaraError("Render technique \"" + oldName + "\" failed, switched to \"" + m_impl->renderTechnique->GetName() + '"');
+		return;
+	}
 }
 
 NzColor NzScene::GetAmbientColor() const

src/Nazara/Graphics/SkyboxBackground.cpp

@@ -223,7 +223,6 @@ void NzSkyboxBackground::Draw(const NzScene* scene) const
 	skyboxMatrix.SetTranslation(NzVector3f::Zero());
 
 	NzRenderer::SetIndexBuffer(m_indexBuffer);
-	NzRenderer::SetMatrix(nzMatrixType_Projection, viewer->GetProjectionMatrix());
 	NzRenderer::SetMatrix(nzMatrixType_View, skyboxMatrix);
 	NzRenderer::SetMatrix(nzMatrixType_World, NzMatrix4f::Scale(NzVector3f(viewer->GetZNear())));
 	NzRenderer::SetRenderStates(states);
@@ -233,6 +232,8 @@ void NzSkyboxBackground::Draw(const NzScene* scene) const
 	NzRenderer::SetVertexBuffer(m_vertexBuffer);
 
 	NzRenderer::DrawIndexedPrimitives(nzPrimitiveMode_TriangleList, 0, 36);
+
+	NzRenderer::SetMatrix(nzMatrixType_View, viewer->GetViewMatrix());
 }
 
 nzBackgroundType NzSkyboxBackground::GetBackgroundType() const