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Revision as of 18:59, 27 December 2007 (edit) Sandman (Talk | contribs) (New page: category:variables category:predefined category:global variables '''Up to Global Variables''' ---- == Definition == '''FLOAT''' frame_time '''Frame_ti...) ← Previous diff		Revision as of 18:59, 27 December 2007 (edit) (undo) Sandman (Talk | contribs) m (→Definition) Next diff →
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	:FPS = 1 / frame_time		:FPS = 1 / frame_time
	Be advised that frame_time is in milliseconds accurate, so it can be 0 at times, so one might prevent such a case from happening:		Be advised that frame_time is in milliseconds accurate, so it can be 0 at times, so one might prevent such a case from happening:
-	:FPS = 1 / ( frame_time+(frame_time==0)*0.0001 );	+	:FPS = 1 / ( frame_time + (frame_time==0)*0.0001 );
	This gives a sort of FPS which is accurate every frame.		This gives a sort of FPS which is accurate every frame.

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Revision as of 18:59, 27 December 2007

Up to Global Variables

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Definition

FLOAT frame_time

Frame_time is a global variable, holding the time passed the last frame. In other words: the difference in time between the start of the last frame and the current frame.

Doing a bit of physics, we see that:

FPS = 1 / frame_time

Be advised that frame_time is in milliseconds accurate, so it can be 0 at times, so one might prevent such a case from happening:

FPS = 1 / ( frame_time + (frame_time==0)*0.0001 );

This gives a sort of FPS which is accurate every frame.

Example

Let a process wait for a certain time by calling this function:

Function int wait(float seconds)
Begin
    While( (seconds-=frame_time) > 0 ) frame; End
    return -seconds;
End

This can be done with a timer too, as is displayed here.

Global variables

• Argc • Argv • Cdinfo • Dump_type • Fading • Fileinfo • Fps • Frame_time • Full_screen • Graph_mode • Mouse • Os_id • Restore_type • Scale_mode • Scroll • Sound_channels • Sound_freq • Sound_mode • Text_flags • Text_z • Timer •