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window-maker.github.io/WINGs_tutorial/glframe.c.1

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#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <X11/keysym.h>
#include <GL/gl.h>
#include <GL/glx.h>
#include <WINGs/WINGs.h>
#include <WINGs/WINGsP.h>
#include <stdio.h>
#define CONTENTH 300
#define CONTENTW 300
#define CONTENTMARGIN 30
struct couple{
WMWindow *window;
WMFrame *frame;
} datacouple;
float red=252.0/256, green=88.0/256, blue=16.0/256;
float redb=252.0/256, greenb=242.0/256, blueb=80.0/256;
int Attr[] = { GLX_RGBA,
GLX_RED_SIZE, 8,
GLX_GREEN_SIZE, 8,
GLX_BLUE_SIZE, 8,
GLX_DEPTH_SIZE, 16,
GLX_DOUBLEBUFFER,
None};
Display * display;
float alpha=0;
void init(void)
{
glClearColor (256/256, 256/256, 256/256, 0.0);
glPolygonMode(GL_FRONT, GL_FILL);
glPolygonMode(GL_BACK, GL_FILL);
glEnable(GL_DEPTH_TEST);
glShadeModel(GL_SMOOTH);
glEnable(GL_LIGHTING);
GLfloat ambientLight[] = { 0.2f, 0.2f, 0.2f, 1.0f };
GLfloat diffuseLight[] = { 0.8f, 0.8f, 0.8f, 1.0f };
GLfloat specularLight[] = { 0.5f, 0.5f, 0.5f, 1.0f };
GLfloat position[] = { 2.0f, -0.1f, 2.0f, 1.0f };
GLfloat position2[] = { -2.0f, -0.26f, -4.0f, 1.0f };
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambientLight);
glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuseLight);
//glLightfv(GL_LIGHT0, GL_SPECULAR, specularLight);
glMateriali(GL_FRONT, GL_SHININESS, 98);
glLightfv(GL_LIGHT0, GL_POSITION, position2);
//glLightfv(GL_LIGHT1, GL_POSITION, position2);
glEnable(GL_LIGHT0);
//glEnable(GL_LIGHT1);
glColorMaterial(GL_FRONT, GL_AMBIENT_AND_DIFFUSE);
//glColorMaterial(GL_FRONT, GL_SPECULAR);
glEnable(GL_COLOR_MATERIAL);
glShadeModel(GL_SMOOTH);
glCullFace( GL_BACK );
glEnable( GL_CULL_FACE );
glEnable(GL_POLYGON_SMOOTH);
/*glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA_SATURATE, GL_ONE);
//glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glHint(GL_POLYGON_SMOOTH_HINT,GL_NICEST);*/
}
void normvector(float a, float aa, float aaa, float b, float bb, float bbb, float c, float cc, float ccc,float *result){
float v1[3];float v2[3];float tmp;
v1[0]=(b-a);v1[1]=(bb-aa);v1[2]=(bbb-aaa);
v2[0]=(b-c);v2[1]=(bb-cc);v2[2]=(bbb-ccc);
result[0]=(v1[1]*v2[2]-v1[2]*v2[1]);
result[1]=(v1[2]*v2[0]-v1[0]*v2[2]);
result[2]=(v1[0]*v2[1]-v1[1]*v2[0]);
tmp=sqrt(result[0]*result[0]+result[1]*result[1]+result[2]*result[2]);
result[0]/=tmp;
result[1]/=tmp;
result[2]/=tmp;
}
void redraw(XEvent * v,void *xw){
Window win;
float z[3];
win = *(Window *)xw;
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glPushMatrix(); glShadeModel(GL_SMOOTH);
glRotatef(alpha, 0, 1, 0);
if (alpha > 360) alpha =alpha-360;
glBegin(GL_TRIANGLES);
glColor3f(redb,greenb,blueb);
normvector(-0.85f, 0.0f, 0.0f,0.0f, 0.0f, 0.85f,0.0f, 0.6f, 0.0f,z);
glNormal3fv(z);
glVertex3f(-0.85f, 0.0f, 0.0f);
glVertex3f(0.0f, 0.0f, 0.85f);
glVertex3f(0.0f, 0.6f, 0.0f);
normvector(0.0f, 0.0f,0.85f,0.85f, 0.0f, 0.0f,0.0f, 0.60f,0.0f,z);
glNormal3fv(z);
glVertex3f(0.0f, 0.0f, 0.85f);
glVertex3f(0.85f, 0.0f, 0.0f);
glVertex3f(0.0f, 0.6f, 0.0f);
glColor3f(red,green,blue);
normvector(0.85f, 0.0f, 0.0f,0.0f, 0.0f, -0.85f,0.0f, 0.6f, 0.0f,z);
glNormal3fv(z);
glVertex3f(0.85f, 0.0f, 0.0f);
glVertex3f(0.0f, 0.0f, -0.85f);
glVertex3f(0.0f, 0.6f, 0.0f);
normvector(0.0f, 0.0f, -0.85f,-0.85f, 0.0f, 0.0f,0.0f, 0.6f, 0.0f,z);
glNormal3fv(z);
glVertex3f(0.0f, 0.0f, -0.85f);
glVertex3f(-0.85f, 0.0f, 0.0f);
glVertex3f(0.0f, 0.6f, 0.0f);
glColor3f(redb,greenb,blueb);
normvector(-0.85f, 0.0f, 0.0f,0.0f, -1.0f, 0.0f,0.0f, 0.0f, 0.85f,z);
glNormal3fv(z);
glVertex3f(-0.85f, 0.0f, 0.0f);
glVertex3f(0.0f, -1.0f, 0.0f);
glVertex3f(0.0f, 0.0f, 0.85f);
normvector(0.0f, 0.0f, 0.85f, 0.0f, -1.0f, 0.0f,0.85f, 0.0f, 0.0f ,z);
glNormal3fv(z);
glVertex3f(0.0f, 0.0f, 0.85f);
glVertex3f(0.0f, -1.0f, 0.0f);
glVertex3f(0.85f, 0.0f, 0.0f);
glColor3f(red,green,blue);
normvector(0.85f, 0.0f, 0.0f,0.0f, -1.0f, 0.0f, 0.0f, 0.0,-0.85f ,z);
glNormal3fv(z);
glVertex3f(0.85f, 0.0f, 0.0f);
glVertex3f(0.0f,-1.0f, 0.0f);
glVertex3f(0.0f, 0.0f, -0.85f);
normvector(0.0f, 0.0f, -0.85f,0.0f, -1.0f, 0.0f, -0.85f, 0.0f,0.0f ,z);
glNormal3fv(z);
glVertex3f(0.0f, 0.0f, -0.85f);
glVertex3f(0.0f, -1.0f, 0.0f);
glVertex3f(-0.85f, 0.0f, 0.0f);
glEnd();
glPopMatrix();
glXSwapBuffers(display, win);
}
setsize(unsigned int width, unsigned int height)
{
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
glMatrixMode (GL_MODELVIEW);
}
void DoRotate(void *self,void *xwindow){
XEvent event;int i=0;
alpha+=15;
redraw(NULL,(Window *)xwindow);
}
void redo(XEvent * event,void *xw){
switch (event->type)
{
case Expose:
if (event->xexpose.count!=0) break;
redraw(event,&event->xexpose.window);
break;
case ConfigureNotify: setsize(event->xconfigure.width, event->xconfigure.height); // assuming there will be an expose afterwards
break;
}
}
void closeAll(WMWidget *self,void *data){
WMDestroyWidget(self);
exit(0);
}
static void resizeHandler(void *data, WMNotification *notif){
struct couple *tmp;tmp=(struct couple *)data;
WMSize size = WMGetViewSize(WMWidgetView(tmp->window));
WMResizeWidget(tmp->frame, size.width -2*CONTENTMARGIN, size.height-2*CONTENTMARGIN);
}
void getargs(int argc, char **argv){
if (argc>3) {
redb=red=(float)atoi(argv[1])/256;
greenb=green=(float)atoi(argv[2])/256;
blueb=blue=(float)atoi(argv[3])/256;
}
if (argc>6){
redb=(float)atoi(argv[4])/256;
greenb=(float)atoi(argv[5])/256;
blueb=(float)atoi(argv[6])/256;
}
}
int main (int argc, char **argv){
WMFrame *glframe;
WMScreen *screen;
WMWindow *window;
WMButton *Button;
/* Xlib and glX variables */
Window win;
XVisualInfo *xvVisualInfo;
Colormap cmColorMap;
XSetWindowAttributes winAttr;
GLXContext glXContext;
getargs(argc,argv);
WMInitializeApplication("GLWindow", &argc, argv);
display = XOpenDisplay("");
screen = WMCreateScreen(display, DefaultScreen(display));
if(!glXQueryExtension(display, NULL, NULL)){wwarning("X server does not have GLX\n"); return 0; }
window = WMCreateWindow(screen, "Main");
WMResizeWidget(window, CONTENTW+2*CONTENTMARGIN, CONTENTH+2*CONTENTMARGIN*CONTENTH/CONTENTW);
WMSetWindowAspectRatio(window, CONTENTW,CONTENTH,CONTENTW,CONTENTH);
WMSetWindowCloseAction(window, closeAll, NULL);
WMSetWindowTitle(window,"GL Frame");
WMRealizeWidget(window);
datacouple.window=window;
WMSetViewNotifySizeChanges(WMWidgetView(window), True);
WMAddNotificationObserver(resizeHandler, &datacouple, WMViewSizeDidChangeNotification, WMWidgetView(window));
glframe = WMCreateFrame(window);
datacouple.frame=glframe;
WMResizeWidget(glframe, CONTENTW, CONTENTH);
WMMoveWidget(glframe, CONTENTMARGIN,CONTENTMARGIN);
WMRealizeWidget(glframe);
Button=WMCreateButton(window, WBTMomentaryPush);
WMSetButtonAction(Button, DoRotate,&win);
WMSetButtonText(Button,"Turn");
WMMoveWidget(Button, CONTENTMARGIN,2);
WMRealizeWidget(Button);
WMMapWidget(Button);
/* get the frame's X window value */
win =W_VIEW_DRAWABLE(WMWidgetView(glframe));
WMCreateEventHandler(WMWidgetView(glframe), ExposureMask|StructureNotifyMask,redo,&win);
xvVisualInfo = glXChooseVisual(display, DefaultScreen(display), Attr);
if(xvVisualInfo == NULL) {wwarning("No visualinfo\n");return 0;}
cmColorMap = XCreateColormap(display,RootWindow(display, DefaultScreen(display)), xvVisualInfo->visual, AllocNone);
winAttr.colormap = cmColorMap;
winAttr.border_pixel = 0;
winAttr.background_pixel = 0;
winAttr.event_mask = ExposureMask | ButtonPressMask |StructureNotifyMask| KeyPressMask;
XChangeWindowAttributes(display,win,CWBorderPixel | CWColormap | CWEventMask,&winAttr);
glXContext = glXCreateContext(display, xvVisualInfo, None, True);
if(!glXContext) {wwarning("glX cannot create rendering context\n");return 0;}
glXMakeCurrent(display, win, glXContext);
WMMapWidget(glframe);
init();
setsize(CONTENTW,CONTENTH);
WMMapWidget(window);
WMScreenMainLoop(screen);
return 0;
}
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