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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Sphere
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Tube
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.
时间： 2024-10-13 19:42:16