Fixes for #30

# Conflicts:
#	src/Game/Game.cpp

src/Engine/Core/Transform.cpp

@@ -0,0 +1,52 @@
+#include "Core/Transform.h"
+
+glm::vec3 Transform::AbsolutePosition(World* world, EntityID entity)
+{
+    glm::vec3 position;
+
+    while (entity != EntityID_Invalid) {
+        ComponentWrapper transform = world->GetComponent(entity, "Transform");
+        EntityID parent = world->GetParent(entity);
+        position += Transform::AbsoluteOrientation(world, parent) * (glm::vec3)transform["Position"];
+        entity = parent;
+    }
+
+    return position;
+}
+
+glm::quat Transform::AbsoluteOrientation(World* world, EntityID entity)
+{
+    glm::quat orientation;
+
+    while (entity != EntityID_Invalid) {
+        ComponentWrapper transform = world->GetComponent(entity, "Transform");
+        orientation = glm::quat((glm::vec3)transform["Orientation"]) * orientation;
+        entity = world->GetParent(entity);
+    }
+
+    return orientation;
+}
+
+glm::vec3 Transform::AbsoluteScale(World* world, EntityID entity)
+{
+    glm::vec3 scale(1.f);
+
+    while (entity != EntityID_Invalid) {
+        ComponentWrapper transform = world->GetComponent(entity, "Transform");
+        scale *= (glm::vec3)transform["Scale"];
+        entity = world->GetParent(entity);
+    }
+
+    return scale;
+}
+
+glm::mat4 Transform::ModelMatrix(EntityID entity, World* world)
+{
+    glm::vec3 position = Transform::AbsolutePosition(world, entity);
+    glm::quat orientation = Transform::AbsoluteOrientation(world, entity);
+    glm::vec3 scale = Transform::AbsoluteScale(world, entity);
+
+    glm::mat4 modelMatrix = glm::translate(glm::mat4(), position) * glm::toMat4(orientation) * glm::scale(scale);
+    return modelMatrix;
+}
+