+ added readme

* fixed timebased movement & maxfps

KKK/game/src/config.cpp

@@ -0,0 +1,2 @@
+#include <include/config.h>
+

KKK/game/src/main.cpp

@@ -31,6 +31,7 @@ public:
 
 int main(int argc, const char *argv[]) {
   MainWindow window(500, 500);
+  window.setmaxfps(60);
   window.loop();
   window.stop();
 }

KKK/game/src/opengl.cpp

@@ -2,6 +2,7 @@
 
 #include <iostream>
 #include <sys/time.h>
+#include <unistd.h>
 
 #define UNUSED(foo) (void)foo;
 
@@ -73,6 +74,14 @@ endofthejedi::GLWindow::~GLWindow() {
   XCloseDisplay(m_display);
 }
 
+void endofthejedi::GLWindow::handleevents() {
+  if (XPending(m_display) > 0) {
+    XEvent xev;
+    XNextEvent(m_display, &xev);
+    handle(xev);
+  }
+}
+
 void endofthejedi::GLWindow::handle(XEvent event) {
   if (event.type == Expose) {
     XWindowAttributes attribs;
@@ -93,25 +102,35 @@ void endofthejedi::GLWindow::swap() { glXSwapBuffers(m_display, m_window); }
 
 void endofthejedi::GLWindow::loop() {
   m_running = true;
+
   timespec prev;
-  clock_gettime(CLOCK_MONOTONIC_RAW, &prev);
   timespec current;
+  clock_gettime(CLOCK_MONOTONIC_RAW, &prev);
   clock_gettime(CLOCK_MONOTONIC_RAW, &current);
+
   double delta = 0.0;
+  double sleeptime = 0.0;
+
   while (m_running) {
-
-    if (XPending(m_display) > 0) {
-      XEvent xev;
-      XNextEvent(m_display, &xev);
-      handle(xev);
-    }
-
+    handleevents();
     render(delta);
     swap();
 
+    if (m_maxfps > 0) {
+      sleeptime = ((1000000000.0/m_maxfps) - delta) + sleeptime;
+      if (sleeptime > 0.0) {
+        usleep((unsigned int)(sleeptime/1000.0));
+        sleeptime = sleeptime - (unsigned int)(sleeptime/1000.0);
+      }
+    }
+
     clock_gettime(CLOCK_MONOTONIC_RAW, &current);
     delta = diff(prev, current).tv_nsec;
     prev = current;
+    if(delta > 0.0) {
+      m_fps = (1000000000.0/delta);
+      std::cout << m_fps << "\n";
+    }
   }
 }