英文:
generate object based on parameters count
问题
我想重构我的代码。我有3个类，它们只有在初始化时所需的点数不同（从2到4）。它们都具有相同的方法名称和数量，但它们的实现方式（真的）不同。
我想要一个类，根据点数，构建适当的对象。我还想能够声明所有贝塞尔曲线的函数原型（使用这个类），例如：
void function(const bezier& curve);
头文件：
#pragma once
#include "glm/vec2.hpp"
struct Custom // 将被删除的临时结构
{
float distance;
glm::vec2 point;
};
// 需要找到一种方法，只有一个类适用于所有贝塞尔曲线
class Bezier3
{
public:
glm::vec2 m_P_0, m_P_1, m_P_2, m_P_3;
// 计数仅用于调试目的，将被删除
size_t m_Count = 100;
Bezier3(const glm::vec2& p_0, const glm::vec2& p_1, const glm::vec2& p_2, const glm::vec2& p_3, const size_t& m_Count);
~Bezier3();
glm::vec2 operator() (const float& t);
glm::vec2 derivate(const float& t);
Custom findClosestPoint(const glm::vec2& point, double& start);
};
class Bezier2
{
public:
glm::vec2 m_P_0, m_P_1, m_P_2;
size_t m_Count = 100;
Bezier2(const glm::vec2& p_0, const glm::vec2& p_1, const glm::vec2& p_2, const size_t& m_Count);
~Bezier2();
glm::vec2 operator() (const float& t);
glm::vec2 derivate(const float& t);
Custom findClosestPoint(const glm::vec2& point);
};
class Bezier1
{
public:
glm::vec2 m_P_0, m_P_1;
size_t m_Count = 100;
Bezier1(const glm::vec2& p_0, const glm::vec2& p_1, const size_t& m_Count);
~Bezier1();
glm::vec2 operator() (const float& t);
glm::vec2 derivate(const float& t);
Custom findClosestPoint(const glm::vec2& point);
};
这是可能的吗？我进行了一些研究，但找不到任何信息。
英文:
I would like to refactor my code. I have 3 classes that differ only by the number of points they take to be initialized (from 2 to 4). They all have the same method name and number, but their implementation is (really) different.
I would like to have a class that, depending on the number of points, constructs the appropriate object. I would also like to be able to declare function prototypes (using this class) for all bézier curves, eg:
void function(const bezier& curve);
The header file:
#pragma once
#include "glm/vec2.hpp"
struct Custom // tmp struc will be removed
{
float distance;
glm::vec2 point;
};
//need to find a way to have only one class for all of bezier
class Bezier3
{
public:
glm::vec2 m_P_0, m_P_1, m_P_2, m_P_3;
// count is for debugging purposes will be removed
size_t m_Count = 100;
Bezier3(const glm::vec2& p_0, const glm::vec2& p_1, const glm::vec2& p_2, const glm::vec2& p_3, const size_t& m_Count);
~Bezier3();
glm::vec2 operator() (const float& t);
glm::vec2 derivate(const float& t);
Custom findClosestPoint(const glm::vec2& point, double& start);
};
class Bezier2
{
public:
glm::vec2 m_P_0, m_P_1, m_P_2;
size_t m_Count = 100;
Bezier2(const glm::vec2& p_0, const glm::vec2& p_1, const glm::vec2& p_2, const size_t& m_Count);
~Bezier2();
glm::vec2 operator() (const float& t);
glm::vec2 derivate(const float& t);
Custom findClosestPoint(const glm::vec2& point);
};
class Bezier1
{
public:
glm::vec2 m_P_0, m_P_1;
size_t m_Count = 100;
Bezier1(const glm::vec2& p_0, const glm::vec2& p_1, const size_t& m_Count);
~Bezier1();
glm::vec2 operator() (const float& t);
glm::vec2 derivate(const float& t);
Custom findClosestPoint(const glm::vec2& point);
};
Is this possible? I did some research, but couldn't find anything.
答案1
得分: 1
你可以这样做：
class Bezier
{
public:
Bezier(const glm::vec2& p_0, const glm::vec2& p_1, const size_t& m_Count) : impl(Bezier1(p_0, p_1, m_Count)) {}
Bezier(const glm::vec2& p_0, const glm::vec2& p_1, const glm::vec2& p_2, const size_t& m_Count) : impl(Bezier2(p_0, p_1, p_2, m_Count)) {}
Bezier(const glm::vec2& p_0, const glm::vec2& p_1, const glm::vec2& p_2, const glm::vec2& p_3, const size_t& m_Count) : impl(Bezier3(p_0, p_1, p_2, p_3, m_Count)) {}
// 其他函数
// ...
private:
std::variant<Bezier1, Bezier2, Bezier3> impl;
};
如果你想要在运行时动态决定类型，例如如果你有一个存储 glm::vec2 的向量，你也可以这样做。
英文:
You can do something like this:
class Bezier
{
public:
Bezier(const glm::vec2& p_0, const glm::vec2& p_1, const size_t& m_Count) : impl(Bezier1(p_0, p_1, m_Count)) {}
Bezier(const glm::vec2& p_0, const glm::vec2& p_1, const glm::vec2& p_2, const size_t& m_Count) : impl(Bezier2(p_0, p_1, p_2, m_Count)) {}
Bezier(const glm::vec2& p_0, const glm::vec2& p_1, const glm::vec2& p_2, const glm::vec2& p_3, const size_t& m_Count) : impl(Bezier3(p_0, p_1, p_2, p_3, m_Count)) {}
// Other functions
// ...
private:
std::variant<Bezier1, Bezier2, Bezier3> impl;
};
If you want to decide on type dynamically, e.g. if you have vector of glm::vec2 you can do that too.
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