Directx11学习笔记【二十一】 封装键盘鼠标响应类

摘要: 本文由zhangbaochong原创，转载请注明出处：http://www.cnblogs.com/zhangbaochong/p/5804565.html

　　由于我们练习的Demo一般都比较简单，对响应时间效率没有太高要求，因此键盘鼠标响应可以采用Win32的处理函数，而不必使用DirectInput，DirectInput在后面会专门再介绍。

　　为了方便使用，封装了一个Input类用于处理键盘鼠标消息，为了方便采用单例模式，代码很简单：

Input.h

 1 #pragma once
 2 #include <Windows.h>
 3 
 4 class Input
 5 {
 6 public:
 7     ~Input();
 8 
 9 public:
10     void Init();
11     void Listen(UINT msg, float x, float y);    //    Listen to the user input
12     static Input* GetInstance()
13     {
14         static Input* instance = new Input();
15 
16         return instance;
17     }
18 
19 public:
20     float GetMouseX() const;
21     float GetMouseY() const;
22     float GetLastMouseX() const;
23     float GetLastMouseY() const;
24     bool IsLMouseDown() const;
25     bool IsRMouseDown() const;
26     bool IsMouseUp() const;
27     bool IsMouseMove() const;
28     int IsKeyDown(int key) const;
29 
30 private:
31     POINT m_lastMousePos;
32     POINT m_mousePos;
33     bool m_lMouseDown;
34     bool m_rMouseDown;
35     bool m_mouseUp;
36     bool m_mouseMove;
37 
38 private:
39     Input();
40     Input(const Input&);
41     void operator=(const Input&);
42 };

Input.cpp

 1 #include "Input.h"
 2 
 3 //******************
 4 //禁止构造复制
 5 //******************
 6 Input::Input() {}
 7 Input::Input(const Input&) {}
 8 Input::~Input() {}
 9 void Input::operator=(const Input&) {}
10 
11 void Input::Init()
12 {
13     m_lastMousePos = { 0, 0 };
14     m_mousePos = { 0, 0 };
15     m_lMouseDown = false;
16     m_rMouseDown = false;
17     m_mouseUp = false;
18     m_mouseMove = false;
19 }
20 
21 void Input::Listen(UINT msg, float x, float y)
22 {
23     m_lastMousePos.x = m_mousePos.x;
24     m_lastMousePos.y = m_mousePos.y;
25 
26     m_mousePos.x = x;
27     m_mousePos.y = y;
28 
29     switch (msg)
30     {
31     case WM_LBUTTONDOWN:
32         m_lMouseDown = true;
33         break;
34     case WM_RBUTTONDOWN:
35         m_rMouseDown = true;
36         break;
37     case WM_LBUTTONUP:
38     case WM_RBUTTONUP:
39         m_mouseUp = true;
40         m_lMouseDown = false;
41         m_rMouseDown = false;
42         break;
43     case WM_MOUSEMOVE:
44         m_mouseMove = true;
45         break;
46     default:
47         m_mouseMove = false;
48         break;
49     }
50 }
51 
52 float  Input::GetMouseX() const
53 {
54     return m_mousePos.x;
55 }
56 
57 float  Input::GetMouseY() const
58 {
59     return m_mousePos.y;
60 }
61 
62 float Input::GetLastMouseX() const
63 {
64     return m_lastMousePos.x;
65 }
66 
67 float  Input::GetLastMouseY() const
68 {
69     return m_lastMousePos.y;
70 }
71 
72 bool Input::IsLMouseDown() const
73 {
74     return m_lMouseDown;
75 }
76 
77 bool Input::IsRMouseDown() const
78 {
79     return m_rMouseDown;
80 }
81 
82 bool Input::IsMouseUp() const
83 {
84     return m_mouseUp;
85 }
86 
87 bool Input::IsMouseMove() const
88 {
89     return m_mouseMove;
90 }
91 
92 int Input::IsKeyDown(int vKey) const
93 {
94     return GetAsyncKeyState(vKey) & 0x8000;
95 }

　　使用的时候先在Dx11Base基类中初始化，并在消息处理函数WndProc中调用Listen函数：

bool SystemClass::init(HINSTANCE hInstance, int nCmdShow)
{
    InputClass::getInstance()->init();
        ...
}
LRESULT CALLBACK Dx11Base::WinProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    Input::GetInstance()->Listen(uMsg, GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam));
        ...
}

　　以上个教程MeshDemo为例，Input类使用如下：

 1 void MeshDemo::UpdateCamera(float dt)
 2 {
 3     //前后左右行走
 4     if (Input::GetInstance()->IsKeyDown('A'))
 5     {
 6         m_camera.Strafe(-6.f*dt);
 7     }
 8     else if (Input::GetInstance()->IsKeyDown('D'))
 9     {
10         m_camera.Strafe(6.f*dt);
11     }
12     if (Input::GetInstance()->IsKeyDown('W'))
13     {
14         m_camera.Walk(6.f*dt);
15     }
16     else if (Input::GetInstance()->IsKeyDown('S'))
17     {
18         m_camera.Walk(-6.f*dt);
19     }
20     
21 
22     if (Input::GetInstance()->IsMouseMove())
23     {
24         float mouseX = Input::GetInstance()->GetMouseX();
25         float mouseY = Input::GetInstance()->GetMouseY();
26         if (Input::GetInstance()->IsLMouseDown())
27         {
28              float dx = XMConvertToRadians(0.25f*(mouseX - m_lastMousePos.x));
29              float dy = XMConvertToRadians(0.25f*(mouseY - m_lastMousePos.y));
30 
31             OutputDebugString(L"left btn click");
32             m_camera.Pitch(dy);
33             m_camera.RotateY(dx);
34         }
35         m_lastMousePos.x = mouseX;
36         m_lastMousePos.y = mouseY;
37     }
38     
39     m_camera.UpdateViewMatrix();
40 }

 

posted @ 2016-08-24 20:54  zhangbaochong  阅读(1235)  评论(0)  编辑  收藏  举报