Redacted
25d080ff2c
Make child entites work. z-sort entity list before rendering. entites have a creation timestamp.
59 lines
1.6 KiB
C++
59 lines
1.6 KiB
C++
#pragma once
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#include <J3ML/LinearAlgebra/Vector2.hpp>
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#include <vector>
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#include <chrono>
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namespace Engine {
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class Entity;
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}
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class Engine::Entity {
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protected:
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// nullptr means no parent.
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Entity* parent = nullptr;
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// Epoch micro-seconds.
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long creation_time = 0.0f;
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std::vector<Entity*> children{};
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Vector2 position = {0, 0};
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// Assuming 0 radians is up.
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float face_angle = 0.0f;
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void UpdateChildren();
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public:
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// Movements independent of the face_angle.
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void MoveX(float speed);
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void MoveY(float speed);
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void Move(float angle_rad, float speed);
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// Movements dependent on face angle.
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void MoveForward(float speed);
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void MoveBackward(float speed);
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void MoveLeft(float speed);
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void MoveRight(float speed);
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void Rotate(float speed);
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void SetRotation(float new_rotation);
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// Parent child structure.
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[[nodiscard]] bool AppendChild(Entity* entity);
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void DestroyChild(Entity* entity);
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void RemoveChild(Entity* entity);
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public:
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[[nodiscard]] std::vector<Entity*> GetChildren() const;
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[[nodiscard]] Entity* GetParent() const;
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// Microseconds.
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[[nodiscard]] long GetCreationTime() const;
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[[nodiscard]] long GetAge() const;
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[[nodiscard]] float GetRotation() const;
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[[nodiscard]] Vector2 GetPosition() const;
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public:
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virtual void Update() {}
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public:
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virtual ~Entity();
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explicit Entity(const Vector2& position, float rotation = 0.0f) :
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creation_time(std::chrono::duration_cast<std::chrono::microseconds>(std::chrono::high_resolution_clock::now().time_since_epoch()).count()),
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position(position), face_angle(rotation) {}
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}; |