camera movement with the fractional time value

[sajis997]

Hello,

I am going through an functional opengl application which I shall be trying to move to Qt with QtQuick and C++ integration. I am following the post "OpenGL under QML"

The typical opengl application has a render function as follows:

  //timing related calcualtion

  //store the current time , which is initially ZERO
  last_time = current_time;

  //now ge the current time
  current_time = glutGet(GLUT_ELAPSED_TIME)/1000.0f;

  //calculate the fractional time difference
  dt = current_time-last_time;

Initially the current_time and last_time is initialized to ZERO. The fractional value dt is then used to do the camera movement within the scene. How do I achieve something similar from Qt Quick. Probably there is a better way to achieve the same issue in QtQuick. Any hint ?

By the way, is it possible to enable the code highlighter here in the post. I used do it using the [code] ...... [/code] , but it is not working here.

Thanks

[edit: add missing coding tags: 3 ` before and after the code SGaist]

[A Former User]

Hi,
you can do this in Javascript like this:

var t0 = new Date()
var t1 = new Date()
var dt = t1 - t0; // delta in ms

Cheers!