gl-magic-lib Code

#include "Logic.hpp"
#include "Object.hpp"
#include <thread>
#include <ctime>

const Vector Logic::g(
  0,
  - 9.8,
  0
);

Graphics& Logic::onLoop() {
  static const auto sleep = std::chrono::milliseconds(20);
  const auto now = std::chrono::high_resolution_clock::now();
  const double dt = std::chrono::duration<double>(now - past).count();
  if (dt > 0) {
    for (
      std::vector<Object*>::iterator i = Object::objects.begin();
      i < Object::objects.end();
      i++
    ) {
      (*i)->simulate(dt);
    }
    past = now;
  }
  std::this_thread::sleep_for(sleep);
  return Graphics::onLoop();
}

const GraphicsListener& Logic::render(Graphics& graphics) const {
  for (
    std::vector<Object*>::const_iterator i = Object::objects.begin();
    i < Object::objects.end();
    i++
  ) {
    if (
      (*i)->active
    ) {
      (*i)->render(
        graphics.push().apply(
          (*i)->matrix
        )
      );
      graphics.pop();
    }
  }
  return *this;
}

Logic::Logic() : Graphics(NAME) {
  std::srand(
    std::clock() * std::time(NULL)
  );
  past = std::chrono::high_resolution_clock::now();
}

Logic::~Logic() {
  std::vector<Object*>::iterator i = Object::objects.begin();
  while (
    i < Object::objects.end()
  ) {
    delete *i;
    i = Object::objects.begin();
  }
}