Ndk: Added CameraComponent (WIP)

Former-commit-id: ae7be5448a1150b7beba10e03916e94df51ea3a0
2015-05-05 18:39:47 +02:00
parent a494ce5cca
commit e55b4edd0c
4 changed files with 405 additions and 0 deletions
--- a/SDK/src/NDK/Components/CameraComponent.cpp
+++ b/SDK/src/NDK/Components/CameraComponent.cpp
@@ -0,0 +1,124 @@
+// Copyright (C) 2015 Jérôme Leclercq
+// This file is part of the "Nazara Development Kit"
+// For conditions of distribution and use, see copyright notice in Prerequesites.hpp
+
+#include <NDK/Components/CameraComponent.hpp>
+#include <NDK/Algorithm.hpp>
+#include <NDK/Components/NodeComponent.hpp>
+
+namespace Ndk
+{
+	/*void CameraComponent::InvalidateNode()
+	{
+		NzNode::InvalidateNode();
+
+		// Le frustum et la view matrix dépendent des paramètres du node, invalidons-les
+		m_frustumUpdated = false;
+		m_viewMatrixUpdated = false;
+	}*/
+
+	void CameraComponent::OnAttached()
+	{
+		InvalidateViewMatrix();
+	}
+
+	void CameraComponent::OnComponentAttached(BaseComponent& component)
+	{
+		if (IsComponent<NodeComponent>(component))
+			InvalidateViewMatrix();
+	}
+
+	void CameraComponent::OnComponentDetached(BaseComponent& component)
+	{
+		if (IsComponent<NodeComponent>(component))
+			InvalidateViewMatrix();
+	}
+
+	void CameraComponent::OnDetached()
+	{
+		InvalidateViewMatrix();
+	}
+
+	void CameraComponent::OnRenderTargetReleased(const NzRenderTarget* renderTarget, void* userdata)
+	{
+		NazaraUnused(userdata);
+
+		if (renderTarget == m_target)
+			m_target = nullptr;
+		else
+			NazaraInternalError("Not listening to " + NzString::Pointer(renderTarget));
+	}
+
+	bool CameraComponent::OnRenderTargetSizeChange(const NzRenderTarget* renderTarget, void* userdata)
+	{
+		NazaraUnused(userdata);
+
+		if (renderTarget == m_target)
+		{
+			InvalidateViewport();
+
+			return true;
+		}
+		else
+		{
+			NazaraInternalError("Not listening to " + NzString::Pointer(renderTarget));
+			return false;
+		}
+	}
+
+	void CameraComponent::UpdateFrustum() const
+	{
+		EnsureProjectionMatrixUpdate();
+		EnsureViewMatrixUpdate();
+
+		m_frustum.Extract(m_viewMatrix, m_projectionMatrix);
+		m_frustumUpdated = true;
+	}
+
+	void CameraComponent::UpdateProjectionMatrix() const
+	{
+		EnsureViewportUpdate(); // Peut affecter l'aspect ratio
+
+		m_projectionMatrix.MakePerspective(m_fov, m_aspectRatio, m_zNear, m_zFar);
+		m_projectionMatrixUpdated = true;
+	}
+
+	void CameraComponent::UpdateViewMatrix() const
+	{
+		NazaraAssert(m_entity && m_entity->HasComponent<NodeComponent>(), "CameraComponent requires NodeComponent");
+
+		NodeComponent& nodeComponent = m_entity->GetComponent<NodeComponent>();
+
+		m_viewMatrix.MakeViewMatrix(nodeComponent.GetPosition(nzCoordSys_Global), nodeComponent.GetRotation(nzCoordSys_Global));
+		m_viewMatrixUpdated = true;
+	}
+
+	void CameraComponent::UpdateViewport() const
+	{
+		NazaraAssert(m_target, "CameraComponent has no target");
+
+		unsigned int targetWidth = m_target->GetWidth();
+		unsigned int targetHeight = std::max(m_target->GetHeight(), 1U); // Pour éviter une division par zéro
+
+		// La zone visée est définie en "pourcentage" (0...1), on calcule les valeurs en pixel
+		NzRectf fViewport(m_targetRegion);
+		fViewport.x *= targetWidth;
+		fViewport.y *= targetHeight;
+		fViewport.width *= targetWidth;
+		fViewport.height *= targetHeight;
+
+		// On calcule le rapport largeur/hauteur, et s'il est différent on invalide
+		float aspectRatio = fViewport.width/fViewport.height;
+		if (!NzNumberEquals(m_aspectRatio, aspectRatio, 0.001f))
+		{
+			m_aspectRatio = aspectRatio;
+
+			InvalidateProjectionMatrix();
+		}
+
+		m_viewport.Set(fViewport);
+		m_viewportUpdated = true;
+	}
+
+	ComponentIndex CameraComponent::componentIndex;
+}