<分区>
我正在为我的 sfml 游戏制作实体类，但我不明白为什么以下代码无法编译。我收到 undefined reference to vtable in Entity 错误。
这是头文件:
#ifndef ENTITY_H
#define ENTITY_H
#include <string>
#include <SFML/System/Vector2.hpp>
#include <SFML/Graphics/Rect.hpp>
#include <SFML/System/Time.hpp>
class Entity
{
public:
Entity(std::string id, sf::Vector2f position, float rotation );
virtual ~Entity() = 0;
virtual sf::FloatRect getBoundingRect() const;
virtual float getRadius() const;
void UpdateVelocity(sf::Time);
void UpdatePosition(sf::Time);
void Update(sf::Time);
float getRotation() const;
sf::Vector2f getPosition() const;
sf::Vector2f getVelocity() const;
sf::Vector2f getAcceleration() const;
private:
std::string mId;
sf::Vector2f mPosition;
float mRotation;
sf::Vector2f mVelocity;
sf::Vector2f mAcceleration;
};
#endif // ENTITY_H
这是cpp文件:
#include "../include/Entity.h"
Entity::Entity(std::string id, sf::Vector2f position, float rotation)
: mId(id)
, mPosition(position)
, mRotation(rotation)
{
}
Entity::~Entity()
{
}
void Entity::UpdateVelocity(sf::Time dt)
{
mVelocity += mAcceleration;
}
void Entity::UpdatePosition(sf::Time dt)
{
mPosition += mVelocity;
}
void Entity::Update(sf::Time dt)
{
UpdateVelocity(dt);
UpdatePosition(dt);
}
float Entity::getRotation() const
{
return mRotation;
}
sf::Vector2f Entity::getPosition() const
{
return mPosition;
}
sf::Vector2f Entity::getVelocity() const
{
return mVelocity;
}
sf::Vector2f Entity::getAcceleration() const
{
return mAcceleration;
}
非常感谢任何帮助!