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added FPS calculation

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This commit is contained in:
Brian Paul 2000-09-15 16:43:57 +00:00
parent 008e4e7e39
commit cefc42f1ba
1 changed files with 16 additions and 1 deletions
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17
progs/demos/reflect.c
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@ -1,4 +1,4 @@
/* $Id: reflect.c,v 1.3 2000/06/15 14:25:48 brianp Exp $ */
/* $Id: reflect.c,v 1.4 2000/09/15 16:43:57 brianp Exp $ */
/*
* Demo of a reflective, texture-mapped surface with OpenGL.
@ -54,6 +54,9 @@ static GLfloat spin;
static GLint Width = 400, Height = 300;
static GLenum ShowBuffer = GL_NONE;
/* performance info */
static GLint T0 = 0;
static GLint Frames = 0;
static void make_table( void )
@ -295,6 +298,18 @@ static void draw_scene( void )
}
glutSwapBuffers();
{
GLint t = glutGet(GLUT_ELAPSED_TIME);
Frames++;
if (t - T0 >= 5000) {
GLfloat seconds = (t - T0) / 1000.0;
GLfloat fps = Frames / seconds;
printf("%d frames in %g seconds = %g FPS\n", Frames, seconds, fps);
T0 = t;
Frames = 0;
}
}
}