ported the University CGI demo from WINDOWS + GLUT + GLEW + GLU + OpenGL 4 to LINUX WAYLAND + EGL + GLES 2 with minimal cuts

GL_STUFF/SOURCES/UTILS/ClockIterator.cpp

@@ -0,0 +1,28 @@
+#include "../../HEADERS/UTILS/ClockIterator.hpp"
+#include <stdexcept>
+
+ClockIterator::ClockIterator(unsigned int loopMillis) {
+	if(loopMillis == 0)
+		throw std::invalid_argument("ClockIterator: loop period must be greater than zero");
+	reset();
+	max = loopMillis;
+}
+
+void ClockIterator::reset() {
+	counter = 0;
+}
+
+unsigned int ClockIterator::step(unsigned int millis) {
+	counter += millis;
+	unsigned int res = counter / max;
+	counter %= max;
+	return res;
+}
+
+float ClockIterator::getPercentage() {
+	return (100.0f * counter) / max;
+}
+
+unsigned int ClockIterator::getPosition() {
+	return counter;
+}