Initial structure

src/game/Transform/TransformSystem.cpp

@@ -0,0 +1,105 @@
+/*
+	This file is part of Daydream Engine.
+	Copyright 2014 Adam Byléhn, Tobias Dahl, Simon Holmberg, Viktor Ljung
+	
+	Daydream Engine is free software: you can redistribute it and/or modify
+	it under the terms of the GNU Lesser General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+	
+	Daydream Engine is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU Lesser General Public License for more details.
+	
+	You should have received a copy of the GNU Lesser General Public License
+	along with Daydream Engine.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "PrecompiledHeader.h"
+#include "Transform/TransformSystem.h"
+#include "Core/World.h"
+
+void dd::Systems::TransformSystem::Initialize()
+{
+}
+
+glm::vec3 dd::Systems::TransformSystem::AbsolutePosition(EntityID entity)
+{
+	glm::vec3 absPosition;
+	glm::quat accumulativeOrientation;
+
+	do
+	{
+		auto transform = m_World->GetComponent<Components::Transform>(entity);
+		//absPosition += transform->Position;
+		entity = m_World->GetEntityParent(entity);
+		auto transform2 = m_World->GetComponent<Components::Transform>(entity);
+		if (entity == 0)
+			absPosition += transform->Position;
+		else
+			absPosition = transform2->Orientation * (absPosition + transform->Position);
+	} while (entity != 0);
+
+	return absPosition * accumulativeOrientation;
+}
+
+glm::quat dd::Systems::TransformSystem::AbsoluteOrientation(EntityID entity)
+{
+	glm::quat absOrientation;
+
+	do
+	{
+		auto transform = m_World->GetComponent<Components::Transform>(entity);
+		absOrientation = transform->Orientation * absOrientation;
+		entity = m_World->GetEntityParent(entity);
+	} while (entity != 0);
+
+	return absOrientation;
+}
+
+glm::vec3 dd::Systems::TransformSystem::AbsoluteScale(EntityID entity)
+{
+	glm::vec3 absScale(1);
+
+	do
+	{
+		auto transform = m_World->GetComponent<Components::Transform>(entity);
+		absScale *= transform->Scale;
+		entity = m_World->GetEntityParent(entity);
+	} while (entity != 0);
+
+	return absScale;
+}
+
+dd::Components::Transform dd::Systems::TransformSystem::AbsoluteTransform(EntityID entity)
+{
+	glm::vec3 absPosition;
+	glm::quat absOrientation;
+	glm::vec3 absScale(1);
+
+	do
+	{
+		auto transform = m_World->GetComponent<Components::Transform>(entity);
+		entity = m_World->GetEntityParent(entity);
+		auto transform2 = m_World->GetComponent<Components::Transform>(entity);
+
+		// Position
+		if (entity == 0)
+			absPosition += transform->Position;
+		else
+			absPosition = transform2->Orientation * (absPosition + transform->Position);
+		// Orientation
+		absOrientation = transform->Orientation * absOrientation;
+		// Scale
+		absScale *= transform->Scale;
+	} while (entity != 0);
+
+	Components::Transform transform;
+	transform.Position = absPosition;
+	transform.Orientation = absOrientation;
+	transform.Scale = absScale;
+
+	return transform;
+}
+