标签：
这是一个小demo，读取物体的顶点坐标值生成3D图像。
三个物体顶点坐标文件。
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DrawGLScene()函数中，循环中每次都会计算两个点之间的距离再进行绘制。
1 VERTEX calculate(int i) // Calculates movement of points during morphing 2 { 3 VERTEX a; 4 a.x = (sour->points[i].x - dest->points[i].x) / steps; 5 a.y = (sour->points[i].y - dest->points[i].y) / steps; 6 a.z = (sour->points[i].z - dest->points[i].z) / steps; 7 return a; 8 }
而下面这段代码是为了让每个morph在转换时看起来更加的流畅和美感，即在转换时增加更多的点。
1 glColor3f(0.0f, 0.5f, 1.0f); 2 tx -= 2 * q.x; 3 ty -= 2 * q.y; 4 tz -= 2 * q.z; 5 glVertex3f(tx, ty, tz); 6 7 glColor3f(0.0f, 0.0f, 1.0f); 8 tx -= 2 * q.x; 9 ty -= 2 * q.y; 10 tz -= 2 * q.z; 11 glVertex3f(tx, ty, tz);
演示图：
下面为代码，同样修改部分位于双行星号内。
1 #include <windows.h> 2 #include <stdio.h> 3 #include <stdlib.h> 4 #include <math.h> 5 #include <string.h> 6 #include <gl/glew.h> 7 #include <gl/glut.h> 8 #pragma comment(lib, "legacy_stdio_definitions.lib") 9 10 /* 11 * Every OpenGL program is linked to a Rendering Context. 12 * A Rendering Context is what links OpenGL calls to the Device Context. 13 * In order for your program to draw to a Window you need to create a Device Context. 14 * The DC connects the Window to the GDI (Graphics Device Interface). 15 */ 16 17 HGLRC hRC = NULL; // Permanent rendering context 18 HDC hDC = NULL; // Private GDI device context 19 HWND hWnd = NULL; // Holds our window handle 20 HINSTANCE hInstance; // Holds the instance of the application 21 22 /* 23 * It‘s important to make this global so that each procedure knows if 24 * the program is running in fullscreen mode or not. 25 */ 26 27 bool keys[256]; // Array used for the keyboard routine 28 bool active = TRUE; // Window active flag set to TRUE by default 29 bool fullscreen = TRUE; // Fullscreen flag set to fullscreen mode by default 30 /******************************************************************************************************************************************/ 31 /******************************************************************************************************************************************/ 32 GLfloat xrot, yrot, zrot; 33 GLfloat xspeed, yspeed, zspeed; 34 GLfloat cx, cy, cz = -15.0f; 35 36 int key = 1; // Used to make sure same morph key is not pressed 37 int step = 0; // Step counter 38 int steps = 200; // Maximum number of steps 39 bool morph = false; 40 41 typedef struct { // 3D points 42 float x, y, z; 43 } VERTEX; 44 45 typedef struct { // Object 46 int vertices; 47 VERTEX* points; 48 } OBJECT; 49 50 int maxver; // Will eventually hold the maximum number of vertices 51 OBJECT morph1, morph2, morph3, morph4; // 4 morphable object 52 OBJECT helper; // Helper objext 53 OBJECT* sour; // Sour object 54 OBJECT* dest; // Dest object 55 56 LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); // Declaration for WndProc 57 58 void objallocate(OBJECT* k, int n) 59 { 60 k->points = (VERTEX*)malloc(sizeof(VERTEX) * n); 61 } 62 63 void objfree(OBJECT* k) 64 { 65 free(k->points); 66 } 67 68 void readstr(FILE* f, char* string) 69 { 70 do { 71 fgets(string, 255, f); 72 } while ((string[0] == ‘/‘) || (string[0] == ‘\n‘)); 73 } 74 75 void objload(char* name, OBJECT* k) 76 { 77 int ver; // Will hold vertices count 78 float rx, ry, rz; // Hold vertex X, Y & Z position 79 FILE* filein; 80 char oneline[255]; 81 82 filein = fopen(name, "rt"); 83 readstr(filein, oneline); 84 sscanf(oneline, "Vertices: %d\n", &ver); 85 k->vertices = ver; 86 objallocate(k, ver); 87 for (int i = 0; i < ver; ++i) { 88 readstr(filein, oneline); 89 sscanf(oneline, "%f %f %f", &rx, &ry, &rz); 90 k->points[i].x = rx; 91 k->points[i].y = ry; 92 k->points[i].z = rz; 93 } 94 fclose(filein); 95 96 if (ver > maxver) 97 maxver = ver; 98 } 99 100 VERTEX calculate(int i) // Calculates movement of points during morphing 101 { 102 VERTEX a; 103 a.x = (sour->points[i].x - dest->points[i].x) / steps; 104 a.y = (sour->points[i].y - dest->points[i].y) / steps; 105 a.z = (sour->points[i].z - dest->points[i].z) / steps; 106 return a; 107 } 108 109 GLvoid ReSizeGLScene(GLsizei width, GLsizei height) // Resize and initialize the GL window 110 { 111 if (height == 0) { // Prevent a divide by zero by 112 height = 1; // Making height equal one 113 } 114 115 glViewport(0, 0, width, height); // Reset the current viewport 116 117 /* 118 * The following lines set the screen up for a perspective view. 119 * Meaning things in the distance get smaller. This creates a realistic looking scene. 120 * The perspective is calculated with a 45 degree viewing angle based on 121 * the windows width and height. The 0.1f, 100.0f is the starting point and 122 * ending point for how deep we can draw into the screen. 123 * 124 * The projection matrix is responsible for adding perspective to our scene. 125 * glLoadIdentity() restores the selected matrix to it‘s original state. 126 * The modelview matrix is where our object information is stored. 127 * Lastly we reset the modelview matrix. 128 */ 129 130 glMatrixMode(GL_PROJECTION); // Select the projection matrix 131 glLoadIdentity(); // Reset the projection matrix 132 133 // Calculate the aspect ratio of the window 134 gluPerspective(45.0f, (GLfloat)width / (GLfloat)height, 0.1f, 100.0f); 135 // glOrtho(0.0f, width, height, 0.0f, -1.0f, 1.0f); // Create orhto 640X480 view (0, 0, at the top) 136 137 glMatrixMode(GL_MODELVIEW); // Seclet the modelview matrix 138 glLoadIdentity(); // Reset the modelview matrix 139 } 140 141 int InitGL(GLvoid) // All setup for OpenGL goes here 142 { 143 glBlendFunc(GL_SRC_ALPHA, GL_ONE); // Set the blending function for translucency 144 glClearColor(0.0f, 0.0f, 0.0f, 0.5f); // Black background 145 glClearDepth(1.0f); // Depth buffer setup 146 glDepthFunc(GL_LESS); // The type of depth test to do 147 glEnable(GL_DEPTH_TEST); 148 glShadeModel(GL_SMOOTH); // Enables smooth color shading 149 glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NEAREST); 150 151 maxver = 0; 152 objload("sphere.txt", &morph1); // Sphere 153 objload("torus.txt", &morph2); // Torus 154 objload("tube.txt", &morph3); // Tube 155 objallocate(&morph4, 486); // Manually reserver Ram for a 4th 468 vertices object 156 157 for (int i = 0; i < 486; ++i) { 158 morph4.points[i].x = ((float)(rand() % 14000) / 1000) - 7; 159 morph4.points[i].y = ((float)(rand() % 14000) / 1000) - 7; 160 morph4.points[i].z = ((float)(rand() % 14000) / 1000) - 7; 161 } 162 163 objload("sphere.txt", &helper); 164 sour = dest = &morph1; 165 166 return TRUE; 167 } 168 /* 169 * For now all we will do is clear the screen to the color we previously decided on, 170 * clear the depth buffer and reset the scene. We wont draw anything yet. 171 */ 172 void DrawGLScene(GLvoid) // Here‘s where we do all the drawing 173 { 174 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); 175 glLoadIdentity(); 176 177 glTranslatef(cx, cy, cz); 178 glRotatef(xrot, 1.0f, 0.0f, 0.0f); 179 glRotatef(yrot, 0.0f, 1.0f, 0.0f); 180 glRotatef(zrot, 0.0f, 0.0f, 1.0f); 181 182 xrot += xspeed; 183 yrot += yspeed; 184 zrot += zspeed; 185 186 GLfloat tx, ty, tz; // Temp 187 VERTEX q; // Holds returned calculated values for one vertex 188 189 glBegin(GL_POINTS); 190 for (int i = 0; i < morph1.vertices; ++i) { 191 if (morph) { 192 q = calculate(i); 193 } 194 else { 195 q.x = q.y = q.z = 0; 196 } 197 helper.points[i].x -= q.x; 198 helper.points[i].y -= q.y; 199 helper.points[i].z -= q.z; 200 tx = helper.points[i].x; 201 ty = helper.points[i].y; 202 tz = helper.points[i].z; 203 204 glColor3f(0.0f, 1.0f, 1.0f); 205 glVertex3f(tx, ty, tz); 206 207 glColor3f(0.0f, 0.5f, 1.0f); 208 tx -= 2 * q.x; 209 ty -= 2 * q.y; 210 tz -= 2 * q.z; 211 glVertex3f(tx, ty, tz); 212 213 glColor3f(0.0f, 0.0f, 1.0f); 214 tx -= 2 * q.x; 215 ty -= 2 * q.y; 216 tz -= 2 * q.z; 217 glVertex3f(tx, ty, tz); 218 } 219 glEnd(); 220 221 if (morph && step <= steps) 222 step++; 223 else { 224 morph = false; 225 sour = dest; 226 step = 0; 227 } 228 } 229 /* 230 * The job of KillGLWindow() is to release the Rendering Context, 231 * the Device Context and finally the Window Handle. 232 */ 233 234 GLvoid KillGLWindow(GLvoid) // Properly kill the window 235 { 236 objfree(&morph1); 237 objfree(&morph2); 238 objfree(&morph3); 239 objfree(&morph4); 240 objfree(&helper); 241 /******************************************************************************************************************************************/ 242 /******************************************************************************************************************************************/ 243 244 if (fullscreen) { // Are we in fullscreen mode 245 246 /* 247 * We use ChangeDisplaySettings(NULL,0) to return us to our original desktop. 248 * After we‘ve switched back to the desktop we make the cursor visible again. 249 */ 250 251 ChangeDisplaySettings(NULL, 0); // if so switch back to the desktop 252 ShowCursor(TRUE); // Show mouse pointer 253 } 254 255 if (hRC) { // Do we have a rendering context 256 if (!wglMakeCurrent(NULL, NULL)) { // Are we able to release the DC and RC contexts 257 MessageBox(NULL, "Release of DC and RC failed.", "SHUTDOWN ERROR", MB_OK | MB_ICONINFORMATION); 258 } 259 260 if (!wglDeleteContext(hRC)) { // Are we able to delete the RC 261 MessageBox(NULL, "Release rendering context failed.", "SHUTDOWN ERROR", MB_OK | MB_ICONINFORMATION); 262 hRC = NULL; // Set RC to NULL 263 } 264 265 if (hDC && !ReleaseDC(hWnd, hDC)) { // Are we able to release the DC 266 MessageBox(NULL, "Release device context failed.", "SHUTDOWN ERROR", MB_OK | MB_ICONINFORMATION); 267 hDC = NULL; // Set DC to NULL 268 } 269 if (hWnd && !DestroyWindow(hWnd)) { // Are we able to destroy the window 270 MessageBox(NULL, "Could not release hWnd.", "SHUTDOWN ERROR", MB_OK | MB_ICONINFORMATION); 271 hWnd = NULL; // Set hWnd to NULL 272 } 273 274 if (!UnregisterClass("OpenGL", hInstance)) { // Are we able to unregister class 275 MessageBox(NULL, "Could not register class.", "SHUTDOWN ERROR", MB_OK | MB_ICONINFORMATION); 276 hInstance = NULL; // Set hInstance to NULL 277 } 278 } 279 } 280 281 /* 282 * The next section of code creates our OpenGL Window. 283 */ 284 285 BOOL CreateGLWindow(char* title, int width, int height, int bits, bool fullscreenflag) 286 { 287 /* 288 * Find a pixel format that matches the one we want 289 */ 290 GLuint PixelFormat; // Holds the result after serching for a match 291 292 /* 293 * Before you create a window, you MUST register a Class for the window 294 */ 295 WNDCLASS wc; // Windows class structure 296 297 /* 298 * dwExStyle and dwStyle will store the Extended and normal Window Style Information. 299 */ 300 DWORD dwExStyle; // Window extend style 301 DWORD dwStyle; // Window style 302 303 RECT WindowRect; // Grabs rectangle upper left/lower right values 304 WindowRect.left = (long)0; // Set left value to 0 305 WindowRect.right = (long)width; // Set right value to requested width 306 WindowRect.top = (long)0; // Set top value to 0 307 WindowRect.bottom = (long)height; // Set bottom value to requested height 308 309 fullscreen = fullscreenflag; // Set the global fullscreen flag 310 311 /* 312 * The style CS_HREDRAW and CS_VREDRAW force the Window to redraw whenever it is resized. 313 * CS_OWNDC creates a private DC for the Window. Meaning the DC is not shared across applications. 314 * WndProc is the procedure that watches for messages in our program. 315 * No extra Window data is used so we zero the two fields. Then we set the instance. 316 * Next we set hIcon to NULL meaning we don‘t want an ICON in the Window, 317 * and for a mouse pointer we use the standard arrow. The background color doesn‘t matter 318 * (we set that in GL). We don‘t want a menu in this Window so we set it to NULL, 319 * and the class name can be any name you want. I‘ll use "OpenGL" for simplicity. 320 */ 321 hInstance = GetModuleHandle(NULL); // Grab an instance for our window 322 wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC; // Redraw on move, and own DC for window 323 wc.lpfnWndProc = (WNDPROC)WndProc; // WndProc handles message 324 wc.cbClsExtra = 0; // No extra window date 325 wc.cbWndExtra = 0; // No extra window date 326 wc.hInstance = hInstance; // set the instance 327 wc.hIcon = LoadIcon(NULL, IDI_WINLOGO); // Load the default icon 328 wc.hCursor = LoadCursor(NULL, IDC_ARROW); // Load the arrow pointer 329 wc.hbrBackground = NULL; // No background requried for GL 330 wc.lpszMenuName = NULL; // We don‘t want a menu 331 wc.lpszClassName = "OpenGL"; // set the class name 332 333 if (!RegisterClass(&wc)) { // Attempt to register the window class 334 MessageBox(NULL, "Failed to register the window class.", "ERROR", MB_OK | MB_ICONEXCLAMATION); 335 return FALSE; // Exit and return false 336 } 337 338 if (fullscreen) { // attempt fullsreen model 339 340 /* 341 T* here are a few very important things you should keep in mind when switching to full screen mode. 342 * Make sure the width and height that you use in fullscreen mode is the same as 343 * the width and height you plan to use for your window, and most importantly, 344 * set fullscreen mode BEFORE you create your window. 345 */ 346 DEVMODE dmScreenSettings; // Device mode 347 memset(&dmScreenSettings, 0, sizeof(dmScreenSettings)); // Make sure memory‘s cleared 348 dmScreenSettings.dmSize = sizeof(dmScreenSettings); // Size of devmode structure 349 dmScreenSettings.dmPelsWidth = width; // Select window width 350 dmScreenSettings.dmPelsHeight = height; // Select window height 351 dmScreenSettings.dmBitsPerPel = bits; // Select bits per pixel 352 dmScreenSettings.dmFields = DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT; 353 354 /* 355 * In the line below ChangeDisplaySettings tries to switch to a mode that matches 356 * what we stored in dmScreenSettings. I use the parameter CDS_FULLSCREEN when switching modes, 357 * because it‘s supposed to remove the start bar at the bottom of the screen, 358 * plus it doesn‘t move or resize the windows on your desktop when you switch to 359 * fullscreen mode and back. 360 */ 361 //Try to set selected mode and get results. Note: CDS_FULLSCREEN gets rid of start bar 362 if (ChangeDisplaySettings(&dmScreenSettings, CDS_FULLSCREEN) != DISP_CHANGE_SUCCESSFUL) { 363 //If the mode fails, offer two options. Quit or run in a window 364 if (MessageBox(NULL, "The requested fullscreen mode is not supported by\n your video card. Use" 365 "windowed mode instead?", "GL", MB_YESNO | MB_ICONEXCLAMATION) == IDYES) 366 { 367 fullscreen = FALSE; // Select windowed mode (fullscreen=FLASE) 368 } 369 else { 370 // Pop up a message box letting user know the programe is closing. 371 MessageBox(NULL, "Program will now close.", "ERROR", MB_OK | MB_ICONSTOP); 372 return FALSE; // Exit and return FALSE 373 } 374 } 375 } 376 377 if (fullscreen) { // Are we still in fullscreen mode 378 379 /* 380 * If we are still in fullscreen mode we‘ll set the extended style to WS_EX_APPWINDOW, 381 * which force a top level window down to the taskbar once our window is visible. 382 * For the window style we‘ll create a WS_POPUP window. 383 * This type of window has no border around it, making it perfect for fullscreen mode. 384 385 * Finally, we disable the mouse pointer. If your program is not interactive, 386 * it‘s usually nice to disable the mouse pointer when in fullscreen mode. It‘s up to you though. 387 */ 388 dwExStyle = WS_EX_APPWINDOW; // Window extended style 389 dwStyle = WS_POPUP; // Window style 390 ShowCursor(FALSE); // Hide mosue pointer 391 } 392 else { 393 394 /* 395 * If we‘re using a window instead of fullscreen mode, 396 * we‘ll add WS_EX_WINDOWEDGE to the extended style. This gives the window a more 3D look. 397 * For style we‘ll use WS_OVERLAPPEDWINDOW instead of WS_POPUP. 398 * WS_OVERLAPPEDWINDOW creates a window with a title bar, sizing border, 399 * window menu, and minimize / maximize buttons. 400 */ 401 dwExStyle = WS_EX_APPWINDOW | WS_EX_WINDOWEDGE; // Window extended style 402 dwStyle = WS_OVERLAPPEDWINDOW; // Window style 403 } 404 405 /* 406 * By using the AdjustWindowRectEx command none of our OpenGL scene will be covered up by the borders, 407 * instead, the window will be made larger to account for the pixels needed to draw the window border. 408 * In fullscreen mode, this command has no effect. 409 */ 410 AdjustWindowRectEx(&WindowRect, dwStyle, FALSE, dwExStyle); // Adjust window to true resqusted 411 412 /* 413 * WS_CLIPSIBLINGS and WS_CLIPCHILDREN are both REQUIRED for OpenGL to work properly. 414 * These styles prevent other windows from drawing over or into our OpenGL Window. 415 */ 416 if (!(hWnd = CreateWindowEx(dwExStyle, // Extended style for the window 417 "OpenGL", // Class name 418 title, // Window title 419 WS_CLIPSIBLINGS | // Requried window style 420 WS_CLIPCHILDREN | // Requried window style 421 dwStyle, // Select window style 422 0, 0, // Window position 423 WindowRect.right - WindowRect.left, // Calculate adjusted window width 424 WindowRect.bottom - WindowRect.top, // Calculate adjusted window height 425 NULL, // No parent window 426 NULL, // No menu 427 hInstance, // Instance 428 NULL))) // Don‘t pass anything to WM_CREATE 429 { 430 KillGLWindow(); //Reset the display 431 MessageBox(NULL, "Window creation error.", "ERROR", MB_OK | MB_ICONEXCLAMATION); 432 return FALSE; // Retrurn FALSE; 433 } 434 435 /* 436 * aside from the stencil buffer and the (slow) accumulation buffer 437 */ 438 static PIXELFORMATDESCRIPTOR pfd = // pfd tells windows how we want things to be 439 { 440 sizeof(PIXELFORMATDESCRIPTOR), // Size of this pixel format descriptor 441 1, // Version number 442 PFD_DRAW_TO_WINDOW | // Format must support window 443 PFD_SUPPORT_OPENGL | // Format must support OpenGL 444 PFD_DOUBLEBUFFER, // Must support double buffer 445 PFD_TYPE_RGBA, // Request an RGBA format 446 bits, // Select our color depth 447 0, 0, 0, 0, 0, 0, // Color bits ignored 448 0, // No alpha buffer 449 0, // shift bit ignored 450 0, // No accumulation buffer 451 0, 0, 0, 0, // Accumulation bits ignored 452 16, // 16Bits Z_Buffer (depth buffer) 453 0, // No stencil buffer 454 0, // No auxiliary buffer 455 PFD_MAIN_PLANE, // Main drawing layer 456 0, // Reserved 457 0, 0, 0 // Layer makes ignored 458 }; 459 460 if (!(hDC = GetDC(hWnd))) { // Did we get a device context 461 KillGLWindow(); // Reset the display 462 MessageBox(NULL, "Can‘t create a GL device context.", "ERROR", MB_OK | MB_ICONEXCLAMATION); 463 return FALSE; // Return FALSE 464 } 465 466 if (!(PixelFormat = ChoosePixelFormat(hDC, &pfd))) { // Did window find a matching pixel format 467 KillGLWindow(); // Reset the display 468 MessageBox(NULL, "Can‘t find a suitable pixelformat.", "ERROR", MB_OK | MB_ICONEXCLAMATION); 469 return FALSE; // Return FALSE; 470 } 471 472 if (!SetPixelFormat(hDC, PixelFormat, &pfd)) { // Are we able to set the pixel format 473 KillGLWindow(); // Reset the display 474 MessageBox(NULL, "Can‘t set the pixelformat.", "ERROR", MB_OK | MB_ICONEXCLAMATION); 475 return FALSE; // Return FALSE; 476 } 477 478 if (!(hRC = wglCreateContext(hDC))) { // Are we able to rendering context 479 KillGLWindow(); // Reset the display 480 MessageBox(NULL, "Can‘t create a GL rendering context.", "ERROR", MB_OK | MB_ICONEXCLAMATION); 481 return FALSE; // Return FASLE; 482 } 483 484 if (!wglMakeCurrent(hDC, hRC)) { // Try to activate the rendering context 485 KillGLWindow(); // Reset the display 486 MessageBox(NULL, "Can‘t activate the GL rendering context.", "ERROR", MB_OK | MB_ICONEXCLAMATION); 487 return FALSE; // Return FALSE 488 } 489 490 /* 491 * ReSizeGLScene passing the screen width and height to set up our perspective OpenGL screen. 492 */ 493 ShowWindow(hWnd, SW_SHOW); // Show the window 494 SetForegroundWindow(hWnd); // slightly higher priority 495 SetFocus(hWnd); // Sets keyboard focus to the window 496 ReSizeGLScene(width, height); // Set up our perspective GL screen 497 498 /* 499 * we can set up lighting, textures, and anything else that needs to be setup in InitGL(). 500 */ 501 if (!InitGL()) { // Initialize our newly created GL window 502 KillGLWindow(); // Reset the display 503 MessageBox(NULL, "Initialize Failed.", "ERROR", MB_OK | MB_ICONEXCLAMATION); 504 return FALSE; // Return FALSE 505 } 506 return TRUE; 507 } 508 509 LRESULT CALLBACK WndProc(HWND hWnd, // Handle for this window 510 UINT uMsg, // Message for this window 511 WPARAM wParam, // Additional message information 512 LPARAM lParam) // Additional message information 513 { 514 switch (uMsg) { // Check for window message 515 case WM_ACTIVATE: { // Check minimization state 516 if (!HIWORD(wParam)) { 517 active = TRUE; // Program is active 518 } 519 else { 520 active = FALSE; // Program is no longer active 521 } 522 return 0; // Return to the message loop 523 } 524 case WM_SYSCOMMAND: { // Intercept system commands 525 switch (wParam) { // Check system calls 526 case SC_SCREENSAVE: // Screensaver trying to start 527 case SC_MONITORPOWER: // Monitor trying to enter powersave 528 return 0; // Prevent form happening 529 } 530 break; // Exit 531 } 532 case WM_CLOSE: { // Did we receive a close message 533 PostQuitMessage(0); // Send a quit message 534 return 0; 535 } 536 case WM_KEYDOWN: { // Is a key being held down 537 keys[wParam] = TRUE; // if so, mark it as TRUE 538 return 0; // Jump back 539 } 540 case WM_KEYUP: { // Has a key been released 541 keys[wParam] = FALSE; // if so, mark it as FALSE 542 return 0; // Jump back 543 } 544 case WM_SIZE: { // Resize the OpenGL window 545 ReSizeGLScene(LOWORD(lParam), HIWORD(lParam)); // LoWord = width HiWord = height 546 return 0; // Jump back 547 } 548 } 549 return DefWindowProc(hWnd, uMsg, wParam, lParam); // Pass all unhandled message to DefWindwProc 550 } 551 552 int WINAPI WinMain(HINSTANCE hInstance, // Instance 553 HINSTANCE hPrevInstance, // Previous instance 554 LPSTR lpCmdLine, // Command line parameters 555 int nCmdShow) // Window show state 556 { 557 MSG msg; // Window message structure 558 BOOL done = FALSE; // Bool variable to exit loop 559 // Ask the user which screen mode they prefer 560 if (MessageBox(NULL, "Would you like to run in fullscreen mode?", 561 "Start fullscreen?", MB_YESNO | MB_ICONQUESTION) == IDNO) 562 { 563 fullscreen = FALSE; // Window mode 564 } 565 // Create our OpenGL window 566 if (!CreateGLWindow("3D Shapes", 640, 480, 16, fullscreen)) { // (Modified) 567 return 0; // Quit if window was not create 568 } 569 /******************************************************************************************************************************************/ 570 /******************************************************************************************************************************************/ 571 572 while (!done) { // Loop that runs until donw = TRUE 573 if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) { // Is there a message wating 574 if (msg.message == WM_QUIT) { // Havw we received a quit message 575 done = TRUE; // if so done = TRUE 576 } 577 else { // If not, deal with window message 578 TranslateMessage(&msg); // Translate message 579 DispatchMessage(&msg); // Dispatch message 580 } 581 } 582 else { 583 // Draw the scene. Watch for ESC key and quit message from DrawGLScene() 584 if (active) { // Program active 585 if (keys[VK_ESCAPE]) { // Was ESC pressed 586 done = TRUE; // ESC signalled a quit 587 } 588 else { // Not time to quit, update screen 589 DrawGLScene(); // Draw scene 590 SwapBuffers(hDC); // Swap buffers (double buffering) 591 } 592 } 593 594 if (keys[VK_PRIOR]) zspeed += 0.0001f; 595 if (keys[VK_NEXT]) zspeed -= 0.0001f; 596 if (keys[VK_DOWN]) xspeed += 0.0001f; 597 if (keys[VK_UP]) xspeed -= 0.0001f; 598 if (keys[VK_RIGHT]) yspeed += 0.0001f; 599 if (keys[VK_LEFT]) yspeed -= 0.0001f; 600 if (keys[‘Q‘]) cz -= 0.001f; 601 if (keys[‘Z‘]) cz += 0.001f; 602 if (keys[‘W‘]) cy += 0.001f; 603 if (keys[‘S‘]) cy -= 0.001f; 604 if (keys[‘D‘]) cx += 0.001f; 605 if (keys[‘A‘]) cx -= 0.001f; 606 if (keys[‘1‘] && (key != 1) && !morph) { key = 1; morph = true; dest = &morph1; } 607 if (keys[‘2‘] && (key != 2) && !morph) { key = 2; morph = true; dest = &morph2; } 608 if (keys[‘3‘] && (key != 3) && !morph) { key = 3; morph = true; dest = &morph3; } 609 if (keys[‘4‘] && (key != 4) && !morph) { key = 4; morph = true; dest = &morph4; } 610 611 /* 612 * It allows us to press the F1 key to switch from fullscreen mode to 613 * windowed mode or windowed mode to fullscreen mode. 614 */ 615 if (keys[VK_F1]) { // Is F1 being pressed 616 keys[VK_F1] = FALSE; // If so make key FASLE 617 KillGLWindow(); // Kill our current window 618 fullscreen = !fullscreen; // Toggle fullscreen / window mode 619 //Recreate our OpenGL window(modified) 620 if (!CreateGLWindow("3D Shapes", 640, 480, 16, fullscreen)) { 621 return 0; // Quit if window was not create 622 } 623 } 624 } 625 } 626 // Shutdown 627 KillGLWindow(); // Kill the window 628 return (msg.wParam); // Exit the program 629 } 630 /******************************************************************************************************************************************/ 631 /******************************************************************************************************************************************/
Thanks for Nehe‘s tutorials, this is his home.
outdated: 25.Morphing & Loading Objects From A File
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原文地址：http://www.cnblogs.com/clairvoyant/p/5721613.html
