基于框架(三)的例程

 基于上一篇文章的D3D框架，一个简单的例程。

按键功能:

W/S  向前/向后行走

A/D  向左/向右扫视

R/F   升/降

Up/Down  俯/仰

Left/Right  偏航

N/M          滚动

 

代码清单:

1. //
2. // 
3. // File: cameraApp.cpp
4. // 
5. // by tianzhihen
6. //
7. // 2008.10.25
8. //
9. // VC++8.0 camera 例程
10. //         
11. //
13. #include "d3dUtility.h"
14. #include "camera.h"
16. //
17. // 全局变量
18. //
20. IDirect3DDevice9* Device = 0; 
22. const int Width  = 640;
23. const int Height = 480;
25. Camera TheCamera(Camera::AIRCRAFT);
27. //
28. // 框架函数
29. //
30. bool Setup()
31. {
32.     //
33.     // 建立一个基本场景
34.     //
36.     d3d::DrawBasicScene(Device, 0.0f); 
38.     //
39.     // 设置投影矩阵
40.     //
42.     D3DXMATRIX proj;
43.     D3DXMatrixPerspectiveFovLH(
44.             &proj,
45.             D3DX_PI * 0.25f, // 45 - degree
46.             (float)Width / (float)Height,
47.             1.0f,
48.             1000.0f);
49.     Device->SetTransform(D3DTS_PROJECTION, &proj);
51.     return true;
52. }
54. void Cleanup()
55. {
56.     // 第一个参数传0
57.     d3d::DrawBasicScene(0, 0.0f);
58. }
60. bool Display(float timeDelta)
61. {
62.     if( Device )
63.     {
64.         //
65.         // 更新场景
66.         //
68.         if( ::GetAsyncKeyState('W') & 0x8000f )
69.             TheCamera.walk(4.0f * timeDelta);
71.         if( ::GetAsyncKeyState('S') & 0x8000f )
72.             TheCamera.walk(-4.0f * timeDelta);
74.         if( ::GetAsyncKeyState('A') & 0x8000f )
75.             TheCamera.strafe(-4.0f * timeDelta);
77.         if( ::GetAsyncKeyState('D') & 0x8000f )
78.             TheCamera.strafe(4.0f * timeDelta);
80.         if( ::GetAsyncKeyState('R') & 0x8000f )
81.             TheCamera.fly(4.0f * timeDelta);
83.         if( ::GetAsyncKeyState('F') & 0x8000f )
84.             TheCamera.fly(-4.0f * timeDelta);
86.         if( ::GetAsyncKeyState(VK_UP) & 0x8000f )
87.             TheCamera.pitch(1.0f * timeDelta);
89.         if( ::GetAsyncKeyState(VK_DOWN) & 0x8000f )
90.             TheCamera.pitch(-1.0f * timeDelta);
92.         if( ::GetAsyncKeyState(VK_LEFT) & 0x8000f )
93.             TheCamera.yaw(-1.0f * timeDelta);
94.             
95.         if( ::GetAsyncKeyState(VK_RIGHT) & 0x8000f )
96.             TheCamera.yaw(1.0f * timeDelta);
98.         if( ::GetAsyncKeyState('N') & 0x8000f )
99.             TheCamera.roll(1.0f * timeDelta);
101.         if( ::GetAsyncKeyState('M') & 0x8000f )
102.             TheCamera.roll(-1.0f * timeDelta);
104.         //
105.         // 更新视点矩阵,由camera位置所得
106.         // 
107.         D3DXMATRIX V;
108.         TheCamera.getViewMatrix(&V);
109.         Device->SetTransform(D3DTS_VIEW, &V);
111.         //
112.         // 绘制
113.         //
115.         Device->Clear(0, 0, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, 0x00000000, 1.0f, 0);
116.         Device->BeginScene();
118.         d3d::DrawBasicScene(Device, 1.0f);
120.         Device->EndScene();
121.         Device->Present(0, 0, 0, 0);
122.     }
123.     return true;
124. }
126. //
127. // WndProc
128. //
129. LRESULT CALLBACK d3d::WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
130. {
131.     switch( msg )
132.     {
133.     case WM_DESTROY:
134.         ::PostQuitMessage(0);
135.         break;
136.         
137.     case WM_KEYDOWN:
138.         if( wParam == VK_ESCAPE )
139.             ::DestroyWindow(hwnd);
141.         break;
142.     }
143.     return ::DefWindowProc(hwnd, msg, wParam, lParam);
144. }
146. //
147. // WinMain
148. //
149. int WINAPI WinMain(HINSTANCE hinstance,
150.                    HINSTANCE prevInstance, 
151.                    PSTR cmdLine,
152.                    int showCmd)
153. {
154.     if(!d3d::InitD3D(hinstance,
155.         Width, Height, true, D3DDEVTYPE_HAL, &Device))
156.     {
157.         ::MessageBox(0, "InitD3D() - FAILED", 0, 0);
158.         return 0;
159.     }
160.         
161.     if(!Setup())
162.     {
163.         ::MessageBox(0, "Setup() - FAILED", 0, 0);
164.         return 0;
165.     }
167.     d3d::EnterMsgLoop( Display );
169.     Cleanup();
171.     Device->Release();
173.     return 0;
174. }