Changeset 046ce72 in opengl-game

Timestamp:

Apr 4, 2018, 6:16:44 AM (6 years ago)

Author:

Dmitry Portnoy <dmp1488@…>

Branches:

feature/imgui-sdl, master, points-test

Children:

1a530df

Parents:

e856d62

Message:

Add an FPS counter.

File:

• new-game.cpp (modified) (2 diffs)

new-game.cpp

@@ -63 +63 @@
 SceneObject* clickedObject = NULL;
 SceneObject* selectedObject = NULL;
+
+double fps;
 
 bool faceClicked(ObjectFace* face, vec4 world_ray, vec4 cam, vec4& click_point);
@@ -408 +410 @@
    bool cam_moved = false;
 
+   int frame_count = 0;
+   double elapsed_seconds_fps = 0.0f, previous_seconds_fps;
+
    double previous_seconds = glfwGetTime();
+
    while (!glfwWindowShouldClose(window)) {
       double current_seconds = glfwGetTime();
       double elapsed_seconds = current_seconds - previous_seconds;
       previous_seconds = current_seconds;
+
+      elapsed_seconds_fps += elapsed_seconds;
+      if (elapsed_seconds_fps > 0.25f) {
+         fps = (double)frame_count / elapsed_seconds_fps;
+         cout << "FPS: " << fps << endl;
+
+         frame_count = 0;
+         elapsed_seconds_fps = 0.0f;
+      }
+
+      frame_count++;
 
       if (fabs(last_position) > 1.0f) {