WINGs_tutorial/glframe.c.1

   1 #include <X11/Xlib.h>
   2 #include <X11/Xatom.h>
   3 #include <X11/keysym.h>
   4 #include <GL/gl.h>
   5 #include <GL/glx.h>
   6
   7 #include <WINGs/WINGs.h>
   8 #include <WINGs/WINGsP.h>
   9 #include <stdio.h>
  10
  11 #define CONTENTH  300
  12 #define CONTENTW  300
  13 #define CONTENTMARGIN 30
  14
  15
  16 struct couple{
  17   WMWindow *window;
  18   WMFrame *frame;
  19 } datacouple;
  20
  21
  22 float red=252.0/256, green=88.0/256, blue=16.0/256;
  23 float redb=252.0/256, greenb=242.0/256, blueb=80.0/256;
  24
  25 int Attr[] = {  GLX_RGBA,
  26                 GLX_RED_SIZE, 8,
  27                 GLX_GREEN_SIZE, 8,
  28                 GLX_BLUE_SIZE, 8,
  29                 GLX_DEPTH_SIZE, 16,
  30                 GLX_DOUBLEBUFFER,
  31                 None};
  32 Display *  display;
  33 float alpha=0;
  34
  35 void init(void)
  36 {
  37 glClearColor (256/256, 256/256, 256/256, 0.0);
  38 glPolygonMode(GL_FRONT, GL_FILL);
  39 glPolygonMode(GL_BACK, GL_FILL);
  40 glEnable(GL_DEPTH_TEST);
  41 glShadeModel(GL_SMOOTH);
  42
  43 glEnable(GL_LIGHTING);
  44 GLfloat ambientLight[] = { 0.2f, 0.2f, 0.2f, 1.0f };
  45 GLfloat diffuseLight[] = { 0.8f, 0.8f, 0.8f, 1.0f };
  46 GLfloat specularLight[] = { 0.5f, 0.5f, 0.5f, 1.0f };
  47 GLfloat position[] = { 2.0f, -0.1f, 2.0f, 1.0f };
  48 GLfloat position2[] = { -2.0f, -0.26f, -4.0f, 1.0f };
  49 glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambientLight);
  50 glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuseLight);
  51 //glLightfv(GL_LIGHT0, GL_SPECULAR, specularLight);
  52 glMateriali(GL_FRONT, GL_SHININESS, 98);
  53 glLightfv(GL_LIGHT0, GL_POSITION, position2);
  54 //glLightfv(GL_LIGHT1, GL_POSITION, position2);
  55
  56 glEnable(GL_LIGHT0);
  57 //glEnable(GL_LIGHT1);
  58 glColorMaterial(GL_FRONT, GL_AMBIENT_AND_DIFFUSE);
  59 //glColorMaterial(GL_FRONT, GL_SPECULAR);
  60 glEnable(GL_COLOR_MATERIAL);
  61 glShadeModel(GL_SMOOTH);
  62 glCullFace( GL_BACK );
  63 glEnable( GL_CULL_FACE );
  64
  65 glEnable(GL_POLYGON_SMOOTH);
  66 /*glEnable(GL_BLEND);
  67 glBlendFunc(GL_SRC_ALPHA_SATURATE, GL_ONE);
  68 //glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
  69 glHint(GL_POLYGON_SMOOTH_HINT,GL_NICEST);*/
  70
  71 }
  72
  73 void normvector(float a, float aa, float aaa, float b, float bb, float bbb, float c, float cc, float ccc,float *result){
  74   float v1[3];float v2[3];float tmp;
  75
  76   v1[0]=(b-a);v1[1]=(bb-aa);v1[2]=(bbb-aaa);
  77   v2[0]=(b-c);v2[1]=(bb-cc);v2[2]=(bbb-ccc);
  78   result[0]=(v1[1]*v2[2]-v1[2]*v2[1]);
  79   result[1]=(v1[2]*v2[0]-v1[0]*v2[2]);
  80   result[2]=(v1[0]*v2[1]-v1[1]*v2[0]);
  81   tmp=sqrt(result[0]*result[0]+result[1]*result[1]+result[2]*result[2]);
  82   result[0]/=tmp;
  83   result[1]/=tmp;
  84   result[2]/=tmp;
  85 }
  86
  87
  88 void redraw(XEvent * v,void *xw){
  89 Window win;
  90 float z[3];
  91
  92 win = *(Window *)xw;
  93
  94 glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
  95 glPushMatrix(); glShadeModel(GL_SMOOTH);
  96
  97 glRotatef(alpha, 0, 1, 0);
  98 if (alpha > 360) alpha =alpha-360;
  99
 100 glBegin(GL_TRIANGLES);
 101
 102 glColor3f(redb,greenb,blueb);
 103 normvector(-0.85f, 0.0f, 0.0f,0.0f, 0.0f, 0.85f,0.0f, 0.6f, 0.0f,z);
 104 glNormal3fv(z);
 105 glVertex3f(-0.85f, 0.0f, 0.0f);
 106 glVertex3f(0.0f, 0.0f, 0.85f);
 107 glVertex3f(0.0f, 0.6f, 0.0f);
 108
 109 normvector(0.0f,  0.0f,0.85f,0.85f, 0.0f, 0.0f,0.0f,  0.60f,0.0f,z);
 110 glNormal3fv(z);
 111 glVertex3f(0.0f, 0.0f, 0.85f);
 112 glVertex3f(0.85f, 0.0f, 0.0f);
 113 glVertex3f(0.0f, 0.6f, 0.0f);
 114
 115 glColor3f(red,green,blue);
 116 normvector(0.85f, 0.0f, 0.0f,0.0f, 0.0f, -0.85f,0.0f, 0.6f, 0.0f,z);
 117 glNormal3fv(z);
 118 glVertex3f(0.85f, 0.0f, 0.0f);
 119 glVertex3f(0.0f, 0.0f, -0.85f);
 120 glVertex3f(0.0f, 0.6f, 0.0f);
 121
 122 normvector(0.0f, 0.0f, -0.85f,-0.85f, 0.0f, 0.0f,0.0f, 0.6f, 0.0f,z);
 123 glNormal3fv(z);
 124 glVertex3f(0.0f, 0.0f, -0.85f);
 125 glVertex3f(-0.85f, 0.0f, 0.0f);
 126 glVertex3f(0.0f, 0.6f, 0.0f);
 127
 128 glColor3f(redb,greenb,blueb);
 129 normvector(-0.85f, 0.0f, 0.0f,0.0f, -1.0f, 0.0f,0.0f, 0.0f, 0.85f,z);
 130 glNormal3fv(z);
 131 glVertex3f(-0.85f, 0.0f, 0.0f);
 132 glVertex3f(0.0f, -1.0f, 0.0f);
 133 glVertex3f(0.0f, 0.0f, 0.85f);
 134
 135 normvector(0.0f, 0.0f, 0.85f, 0.0f, -1.0f, 0.0f,0.85f, 0.0f, 0.0f ,z);
 136 glNormal3fv(z);
 137 glVertex3f(0.0f, 0.0f, 0.85f);
 138 glVertex3f(0.0f, -1.0f, 0.0f);
 139 glVertex3f(0.85f, 0.0f, 0.0f);
 140
 141 glColor3f(red,green,blue);
 142 normvector(0.85f, 0.0f, 0.0f,0.0f, -1.0f, 0.0f, 0.0f, 0.0,-0.85f ,z);
 143 glNormal3fv(z);
 144 glVertex3f(0.85f, 0.0f, 0.0f);
 145 glVertex3f(0.0f,-1.0f, 0.0f);
 146 glVertex3f(0.0f, 0.0f, -0.85f);
 147
 148 normvector(0.0f, 0.0f, -0.85f,0.0f, -1.0f, 0.0f, -0.85f, 0.0f,0.0f ,z);
 149 glNormal3fv(z);
 150 glVertex3f(0.0f, 0.0f, -0.85f);
 151 glVertex3f(0.0f, -1.0f, 0.0f);
 152 glVertex3f(-0.85f, 0.0f, 0.0f);
 153
 154 glEnd();
 155
 156 glPopMatrix();
 157 glXSwapBuffers(display, win);
 158 }
 159
 160 setsize(unsigned int width, unsigned int height)
 161 {
 162 glViewport(0, 0, width, height);
 163 glMatrixMode(GL_PROJECTION);
 164 glLoadIdentity();
 165 glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
 166 glMatrixMode (GL_MODELVIEW);
 167 }
 168
 169 void DoRotate(void *self,void *xwindow){
 170  XEvent event;int i=0;
 171  alpha+=15;
 172 redraw(NULL,(Window *)xwindow);
 173 }
 174
 175 void redo(XEvent * event,void *xw){
 176         switch (event->type)
 177                 {
 178                 case Expose:
 179                  if (event->xexpose.count!=0) break;
 180                  redraw(event,&event->xexpose.window);
 181                  break;
 182                 case ConfigureNotify: setsize(event->xconfigure.width, event->xconfigure.height); // assuming there will be an expose afterwards
 183                   break;
 184                 }
 185 }
 186
 187 void closeAll(WMWidget *self,void *data){
 188   WMDestroyWidget(self);
 189   exit(0);
 190 }
 191
 192 static void resizeHandler(void *data, WMNotification *notif){
 193  struct couple *tmp;tmp=(struct couple *)data;
 194   WMSize size = WMGetViewSize(WMWidgetView(tmp->window));
 195   WMResizeWidget(tmp->frame, size.width -2*CONTENTMARGIN, size.height-2*CONTENTMARGIN);
 196 }
 197
 198 void getargs(int argc, char **argv){
 199 if (argc>3) {
 200    redb=red=(float)atoi(argv[1])/256;
 201   greenb=green=(float)atoi(argv[2])/256;
 202   blueb=blue=(float)atoi(argv[3])/256;
 203 }
 204  if (argc>6){
 205    redb=(float)atoi(argv[4])/256;
 206   greenb=(float)atoi(argv[5])/256;
 207   blueb=(float)atoi(argv[6])/256;
 208   }
 209 }
 210
 211 int main (int argc, char **argv){
 212
 213 WMFrame *glframe;
 214 WMScreen *screen;
 215 WMWindow *window;
 216 WMButton *Button;
 217
 218
 219 /*    Xlib and glX variables    */
 220 Window  win;
 221 XVisualInfo     *xvVisualInfo;
 222 Colormap        cmColorMap;
 223 XSetWindowAttributes    winAttr;
 224 GLXContext       glXContext;
 225
 226 getargs(argc,argv);
 227 WMInitializeApplication("GLWindow", &argc, argv);
 228 display = XOpenDisplay("");
 229 screen = WMCreateScreen(display, DefaultScreen(display));
 230
 231  if(!glXQueryExtension(display, NULL, NULL)){wwarning("X server does not have GLX\n"); return 0; }
 232
 233 window = WMCreateWindow(screen, "Main");
 234 WMResizeWidget(window, CONTENTW+2*CONTENTMARGIN, CONTENTH+2*CONTENTMARGIN*CONTENTH/CONTENTW);
 235 WMSetWindowAspectRatio(window, CONTENTW,CONTENTH,CONTENTW,CONTENTH);
 236 WMSetWindowCloseAction(window, closeAll, NULL);
 237 WMSetWindowTitle(window,"GL Frame");
 238 WMRealizeWidget(window);
 239 datacouple.window=window;
 240 WMSetViewNotifySizeChanges(WMWidgetView(window), True);
 241 WMAddNotificationObserver(resizeHandler, &datacouple, WMViewSizeDidChangeNotification, WMWidgetView(window));
 242
 243
 244 glframe = WMCreateFrame(window);
 245 datacouple.frame=glframe;
 246 WMResizeWidget(glframe, CONTENTW, CONTENTH);
 247 WMMoveWidget(glframe, CONTENTMARGIN,CONTENTMARGIN);
 248 WMRealizeWidget(glframe);
 249
 250 Button=WMCreateButton(window, WBTMomentaryPush);
 251 WMSetButtonAction(Button, DoRotate,&win);
 252 WMSetButtonText(Button,"Turn");
 253 WMMoveWidget(Button, CONTENTMARGIN,2);
 254 WMRealizeWidget(Button);
 255 WMMapWidget(Button);
 256
 257 /*  get the frame's X window value  */
 258 win =W_VIEW_DRAWABLE(WMWidgetView(glframe));
 259 WMCreateEventHandler(WMWidgetView(glframe), ExposureMask|StructureNotifyMask,redo,&win);
 260
 261 xvVisualInfo = glXChooseVisual(display, DefaultScreen(display), Attr);
 262  if(xvVisualInfo == NULL) {wwarning("No visualinfo\n");return 0;}
 263
 264 cmColorMap = XCreateColormap(display,RootWindow(display, DefaultScreen(display)), xvVisualInfo->visual, AllocNone);
 265
 266 winAttr.colormap = cmColorMap;
 267 winAttr.border_pixel = 0;
 268 winAttr.background_pixel = 0;
 269 winAttr.event_mask = ExposureMask | ButtonPressMask  |StructureNotifyMask| KeyPressMask;
 270
 271 XChangeWindowAttributes(display,win,CWBorderPixel | CWColormap | CWEventMask,&winAttr);
 272 glXContext = glXCreateContext(display, xvVisualInfo, None, True);
 273   if(!glXContext) {wwarning("glX cannot create rendering context\n");return 0;}
 274
 275 glXMakeCurrent(display, win, glXContext);
 276
 277 WMMapWidget(glframe);
 278 init();
 279 setsize(CONTENTW,CONTENTH);
 280 WMMapWidget(window);
 281
 282 WMScreenMainLoop(screen);
 283
 284 return 0;
 285 }