flower/Source/Engine/Scene/Component/Transform.h

#pragma once
#include "../Component.h"

namespace Flower
{
	class SceneNode;

	class Transform : public Component
	{
		ARCHIVE_DECLARE;

	protected:
		// need update?
		bool m_bUpdateFlag = true;

		// world space matrix.
		glm::mat4 m_worldMatrix = glm::mat4(1.0);

		// Prev-frame world matrix.
		glm::mat4 m_prevWorldMatrix = glm::mat4(1.0);

#pragma region SerializeField
		////////////////////////////// Serialize area //////////////////////////////
	protected:
		glm::vec3 m_translation = { .0f, .0f, .0f };
		glm::quat m_rotation = { 1.f, .0f, .0f, .0f };
		glm::vec3 m_scale = { 1.f, 1.f, 1.f };

		////////////////////////////// Serialize area //////////////////////////////
#pragma endregion SerializeField

	public:
		Transform() = default;
		virtual ~Transform() = default;

		Transform(std::shared_ptr<SceneNode> sceneNode)
			: Component(sceneNode)
		{

		}

	public:
		virtual void tick(const RuntimeModuleTickData& tickData) override;

	public:
		// getter
		glm::vec3& getTranslation();
		const glm::vec3& getTranslation() const;

		glm::quat& getRotation();
		const glm::quat& getRotation() const;

		glm::vec3& getScale();
		const glm::vec3& getScale() const;

		// get local matrix, no relate to parent. 
		glm::mat4 getMatrix() const;

		// mark world matrix dirty, also change child's dirty state.
		void invalidateWorldMatrix();

		// setter.
		void setTranslation(const glm::vec3& translation);
		void setRotation(const glm::quat& rotation);
		void setScale(const glm::vec3& scale);
		void setMatrix(const glm::mat4& matrix);

		// get final world matrix. relate to parent.
		glm::mat4 getWorldMatrix();

		// get last tick world matrix result.
		glm::mat4 getPrevWorldMatrix();

		void updateWorldTransform();
	};
}