WINGs_tutorial/glframe.c

   1 #include <X11/keysym.h>
   2 #include <GL/gl.h>
   3 #include <GL/glx.h>
   4
   5 #include <WINGs/WINGs.h>
   6 #include <WINGs/WINGsP.h>
   7 #include <stdio.h>
   8
   9 #define CONTENTH  300
  10 #define CONTENTW  300
  11 #define CONTENTMARGIN 30
  12
  13
  14 struct couple{
  15   WMWindow *window;
  16   WMFrame *frame;
  17 } datacouple;
  18
  19
  20 float red=252.0/256, green=88.0/256, blue=16.0/256;
  21 float redb=252.0/256, greenb=242.0/256, blueb=80.0/256;
  22
  23 int Attr[] = {  GLX_RGBA,
  24                 GLX_RED_SIZE, 8,
  25                 GLX_GREEN_SIZE, 8,
  26                 GLX_BLUE_SIZE, 8,
  27                 GLX_DEPTH_SIZE, 16,
  28                 GLX_DOUBLEBUFFER,
  29                 None};
  30 Display *  display;
  31 float alpha=0;
  32
  33 void init(void)
  34 {
  35 glClearColor (256/256, 256/256, 256/256, 0.0);
  36 glPolygonMode(GL_FRONT, GL_FILL);
  37 glPolygonMode(GL_BACK, GL_FILL);
  38 glEnable(GL_DEPTH_TEST);
  39 glShadeModel(GL_SMOOTH);
  40
  41 glEnable(GL_LIGHTING);
  42 GLfloat ambientLight[] = { 0.2f, 0.2f, 0.2f, 1.0f };
  43 GLfloat diffuseLight[] = { 0.8f, 0.8f, 0.8f, 1.0f };
  44 GLfloat specularLight[] = { 0.5f, 0.5f, 0.5f, 1.0f };
  45 GLfloat position[] = { 2.0f, -0.1f, 2.0f, 1.0f };
  46 GLfloat position2[] = { -2.0f, -0.26f, -4.0f, 1.0f };
  47 glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambientLight);
  48 glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuseLight);
  49 //glLightfv(GL_LIGHT0, GL_SPECULAR, specularLight);
  50 glMateriali(GL_FRONT, GL_SHININESS, 98);
  51 glLightfv(GL_LIGHT0, GL_POSITION, position2);
  52 //glLightfv(GL_LIGHT1, GL_POSITION, position2);
  53
  54 glEnable(GL_LIGHT0);
  55 //glEnable(GL_LIGHT1);
  56 glColorMaterial(GL_FRONT, GL_AMBIENT_AND_DIFFUSE);
  57 //glColorMaterial(GL_FRONT, GL_SPECULAR);
  58 glEnable(GL_COLOR_MATERIAL);
  59 glShadeModel(GL_SMOOTH);
  60 glCullFace( GL_BACK );
  61 glEnable( GL_CULL_FACE );
  62
  63 glEnable(GL_POLYGON_SMOOTH);
  64 /*glEnable(GL_BLEND);
  65 glBlendFunc(GL_SRC_ALPHA_SATURATE, GL_ONE);
  66 //glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
  67 glHint(GL_POLYGON_SMOOTH_HINT,GL_NICEST);*/
  68
  69 }
  70
  71 void normvector(float a, float aa, float aaa, float b, float bb, float bbb, float c, float cc, float ccc,float *result){
  72   float v1[3];float v2[3];float tmp;
  73
  74   v1[0]=(b-a);v1[1]=(bb-aa);v1[2]=(bbb-aaa);
  75   v2[0]=(b-c);v2[1]=(bb-cc);v2[2]=(bbb-ccc);
  76   result[0]=(v1[1]*v2[2]-v1[2]*v2[1]);
  77   result[1]=(v1[2]*v2[0]-v1[0]*v2[2]);
  78   result[2]=(v1[0]*v2[1]-v1[1]*v2[0]);
  79   tmp=sqrt(result[0]*result[0]+result[1]*result[1]+result[2]*result[2]);
  80   result[0]/=tmp;
  81   result[1]/=tmp;
  82   result[2]/=tmp;
  83 }
  84
  85
  86 void redraw(XEvent * v,void *xw){
  87 Window win;
  88 float z[3];
  89
  90 win = *(Window *)xw;
  91
  92 glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
  93 glPushMatrix(); glShadeModel(GL_SMOOTH);
  94
  95 glRotatef(alpha, 0, 1, 0);
  96 if (alpha > 360) alpha =alpha-360;
  97
  98 glBegin(GL_TRIANGLES);
  99
 100 glColor3f(redb,greenb,blueb);
 101 normvector(-0.85f, 0.0f, 0.0f,0.0f, 0.0f, 0.85f,0.0f, 0.6f, 0.0f,z);
 102 glNormal3fv(z);
 103 glVertex3f(-0.85f, 0.0f, 0.0f);
 104 glVertex3f(0.0f, 0.0f, 0.85f);
 105 glVertex3f(0.0f, 0.6f, 0.0f);
 106
 107 normvector(0.0f,  0.0f,0.85f,0.85f, 0.0f, 0.0f,0.0f,  0.60f,0.0f,z);
 108 glNormal3fv(z);
 109 glVertex3f(0.0f, 0.0f, 0.85f);
 110 glVertex3f(0.85f, 0.0f, 0.0f);
 111 glVertex3f(0.0f, 0.6f, 0.0f);
 112
 113 glColor3f(red,green,blue);
 114 normvector(0.85f, 0.0f, 0.0f,0.0f, 0.0f, -0.85f,0.0f, 0.6f, 0.0f,z);
 115 glNormal3fv(z);
 116 glVertex3f(0.85f, 0.0f, 0.0f);
 117 glVertex3f(0.0f, 0.0f, -0.85f);
 118 glVertex3f(0.0f, 0.6f, 0.0f);
 119
 120 normvector(0.0f, 0.0f, -0.85f,-0.85f, 0.0f, 0.0f,0.0f, 0.6f, 0.0f,z);
 121 glNormal3fv(z);
 122 glVertex3f(0.0f, 0.0f, -0.85f);
 123 glVertex3f(-0.85f, 0.0f, 0.0f);
 124 glVertex3f(0.0f, 0.6f, 0.0f);
 125
 126 glColor3f(redb,greenb,blueb);
 127 normvector(-0.85f, 0.0f, 0.0f,0.0f, -1.0f, 0.0f,0.0f, 0.0f, 0.85f,z);
 128 glNormal3fv(z);
 129 glVertex3f(-0.85f, 0.0f, 0.0f);
 130 glVertex3f(0.0f, -1.0f, 0.0f);
 131 glVertex3f(0.0f, 0.0f, 0.85f);
 132
 133 normvector(0.0f, 0.0f, 0.85f, 0.0f, -1.0f, 0.0f,0.85f, 0.0f, 0.0f ,z);
 134 glNormal3fv(z);
 135 glVertex3f(0.0f, 0.0f, 0.85f);
 136 glVertex3f(0.0f, -1.0f, 0.0f);
 137 glVertex3f(0.85f, 0.0f, 0.0f);
 138
 139 glColor3f(red,green,blue);
 140 normvector(0.85f, 0.0f, 0.0f,0.0f, -1.0f, 0.0f, 0.0f, 0.0,-0.85f ,z);
 141 glNormal3fv(z);
 142 glVertex3f(0.85f, 0.0f, 0.0f);
 143 glVertex3f(0.0f,-1.0f, 0.0f);
 144 glVertex3f(0.0f, 0.0f, -0.85f);
 145
 146 normvector(0.0f, 0.0f, -0.85f,0.0f, -1.0f, 0.0f, -0.85f, 0.0f,0.0f ,z);
 147 glNormal3fv(z);
 148 glVertex3f(0.0f, 0.0f, -0.85f);
 149 glVertex3f(0.0f, -1.0f, 0.0f);
 150 glVertex3f(-0.85f, 0.0f, 0.0f);
 151
 152 glEnd();
 153
 154 glPopMatrix();
 155 glXSwapBuffers(display, win);
 156 }
 157
 158 setsize(unsigned int width, unsigned int height)
 159 {
 160 glViewport(0, 0, width, height);
 161 glMatrixMode(GL_PROJECTION);
 162 glLoadIdentity();
 163 glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
 164 glMatrixMode (GL_MODELVIEW);
 165 }
 166
 167 void DoRotate(void *self,void *xwindow){
 168  XEvent event;int i=0;
 169  alpha+=15;
 170 redraw(NULL,(Window *)xwindow);
 171 }
 172
 173 void redo(XEvent * event,void *xw){
 174         switch (event->type)
 175                 {
 176                 case Expose:
 177                  if (event->xexpose.count!=0) break;
 178                  redraw(event,&event->xexpose.window);
 179                  break;
 180                 case ConfigureNotify: setsize(event->xconfigure.width, event->xconfigure.height); // assuming there will be an expose afterwards
 181                   break;
 182                 }
 183 }
 184
 185 void closeAll(WMWidget *self,void *data){
 186   WMDestroyWidget(self);
 187   exit(0);
 188 }
 189
 190 static void resizeHandler(void *data, WMNotification *notif){
 191  struct couple *tmp;tmp=(struct couple *)data;
 192   WMSize size = WMGetViewSize(WMWidgetView(tmp->window));
 193   WMResizeWidget(tmp->frame, size.width -2*CONTENTMARGIN, size.height-2*CONTENTMARGIN);
 194 }
 195
 196 void getargs(int argc, char **argv){
 197 if (argc>3) {
 198    redb=red=(float)atoi(argv[1])/256;
 199   greenb=green=(float)atoi(argv[2])/256;
 200   blueb=blue=(float)atoi(argv[3])/256;
 201 }
 202  if (argc>6){
 203    redb=(float)atoi(argv[4])/256;
 204   greenb=(float)atoi(argv[5])/256;
 205   blueb=(float)atoi(argv[6])/256;
 206   }
 207 }
 208
 209 int main (int argc, char **argv){
 210
 211 WMFrame *glframe;
 212 WMScreen *screen;
 213 WMWindow *window;
 214 WMButton *Button;
 215
 216
 217 /*    Xlib and glX variables    */
 218 Window  win;
 219 XVisualInfo     *xvVisualInfo;
 220 Colormap        cmColorMap;
 221 XSetWindowAttributes    winAttr;
 222 GLXContext       glXContext;
 223
 224 getargs(argc,argv);
 225 WMInitializeApplication("GLWindow", &argc, argv);
 226 display = XOpenDisplay("");
 227 screen = WMCreateScreen(display, DefaultScreen(display));
 228
 229  if(!glXQueryExtension(display, NULL, NULL)){wwarning("X server does not have GLX\n"); return 0; }
 230
 231 window = WMCreateWindow(screen, "Main");
 232 WMResizeWidget(window, CONTENTW+2*CONTENTMARGIN, CONTENTH+2*CONTENTMARGIN*CONTENTH/CONTENTW);
 233 WMSetWindowAspectRatio(window, CONTENTW,CONTENTH,CONTENTW,CONTENTH);
 234 WMSetWindowCloseAction(window, closeAll, NULL);
 235 WMSetWindowTitle(window,"GL Frame");
 236 WMRealizeWidget(window);
 237 datacouple.window=window;
 238 WMSetViewNotifySizeChanges(WMWidgetView(window), True);
 239 WMAddNotificationObserver(resizeHandler, &datacouple, WMViewSizeDidChangeNotification, WMWidgetView(window));
 240
 241
 242 glframe = WMCreateFrame(window);
 243 datacouple.frame=glframe;
 244 WMResizeWidget(glframe, CONTENTW, CONTENTH);
 245 WMMoveWidget(glframe, CONTENTMARGIN,CONTENTMARGIN);
 246 WMRealizeWidget(glframe);
 247
 248 Button=WMCreateButton(window, WBTMomentaryPush);
 249 WMSetButtonAction(Button, DoRotate,&win);
 250 WMSetButtonText(Button,"Turn");
 251 WMMoveWidget(Button, CONTENTMARGIN,2);
 252 WMRealizeWidget(Button);
 253 WMMapWidget(Button);
 254
 255 /*  get the frame's X window value  */
 256 win =W_VIEW_DRAWABLE(WMWidgetView(glframe));
 257 WMCreateEventHandler(WMWidgetView(glframe), ExposureMask|StructureNotifyMask,redo,&win);
 258
 259 xvVisualInfo = glXChooseVisual(display, DefaultScreen(display), Attr);
 260  if(xvVisualInfo == NULL) {wwarning("No visualinfo\n");return 0;}
 261
 262 cmColorMap = XCreateColormap(display,RootWindow(display, DefaultScreen(display)), xvVisualInfo->visual, AllocNone);
 263
 264 winAttr.colormap = cmColorMap;
 265 winAttr.border_pixel = 0;
 266 winAttr.background_pixel = 0;
 267 winAttr.event_mask = ExposureMask | ButtonPressMask  |StructureNotifyMask| KeyPressMask;
 268
 269 XChangeWindowAttributes(display,win,CWBorderPixel | CWColormap | CWEventMask,&winAttr);
 270 glXContext = glXCreateContext(display, xvVisualInfo, None, True);
 271   if(!glXContext) {wwarning("glX cannot create rendering context\n");return 0;}
 272
 273 glXMakeCurrent(display, win, glXContext);
 274
 275 WMMapWidget(glframe);
 276 init();
 277 setsize(CONTENTW,CONTENTH);
 278 WMMapWidget(window);
 279
 280 WMScreenMainLoop(screen);
 281
 282 return 0;
 283 }