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Compute and display FPS in Simple_OpenGL demo application

pull/8/merge^2
Séverin Lemaignan 2012-10-23 14:26:42 +02:00
parent 3b1464a6d9
commit adc3de3882
1 changed files with 13 additions and 0 deletions
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13
samples/SimpleOpenGL/Sample_SimpleOpenGL.c
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@ -11,6 +11,7 @@
// ---------------------------------------------------------------------------- // ----------------------------------------------------------------------------
#include <stdlib.h> #include <stdlib.h>
#include <stdio.h>
#include <GL/glut.h> #include <GL/glut.h>
@ -235,11 +236,23 @@ void recursive_render (const struct aiScene *sc, const struct aiNode* nd)
void do_motion (void) void do_motion (void)
{ {
static GLint prev_time = 0; static GLint prev_time = 0;
static GLint prev_fps_time = 0;
static int frames = 0;
int time = glutGet(GLUT_ELAPSED_TIME); int time = glutGet(GLUT_ELAPSED_TIME);
angle += (time-prev_time)*0.01; angle += (time-prev_time)*0.01;
prev_time = time; prev_time = time;
frames += 1;
if ((time - prev_fps_time) > 1000) // update every seconds
{
int current_fps = frames * 1000 / (time - prev_fps_time);
printf("%d fps\n", current_fps);
frames = 0;
prev_fps_time = time;
}
glutPostRedisplay (); glutPostRedisplay ();
} }