Frame time - Revision history

Sandman: /* Example */

2008-03-24T09:54:31Z

Example

←Older revision		Revision as of 09:54, 24 March 2008
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	</pre>		</pre>

-	This can be done with a timer too, as is displayed [[timer#Example\|here]]~~, along with an example on how to measure time using frame_time~~.	+	This can be done with a timer too, as is displayed [[timer#Example\|here]].

	{{Globals}}		{{Globals}}

Sandman: /* Example */

2008-01-21T00:19:20Z

Example

←Older revision		Revision as of 00:19, 21 January 2008
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	End		End
	</pre>		</pre>
-	Used in example: [[set_mode]](), [[write_int]](), [[write_float]](), [[key]](), [[~~frame_time~~]]	+	Used in example: [[set_mode]](), [[write_int]](), [[write_float]](), [[key]](), [[timer]]

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

Sandman at 00:18, 21 January 2008

2008-01-21T00:18:43Z

←Older revision		Revision as of 00:18, 21 January 2008
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	== Example ==		== Example ==
		+	Display how long the program has been running, by use of frame_time:
		+	<pre>
		+	Program timers;
		+	Private
		+	int ft; // Help variable
		+	int i; // how long the program has been running in 1/100s
		+	float f; // how long the program has been running in 1/100s
		+	Begin
		+
		+	set_mode(320,400,8);
		+	write_int (0,0,300,0,&timer);
		+	write_int (0,0,310,0,&i);
		+	write_float (0,0,320,0,&f);
		+
		+	Repeat
		+
		+	// Calculate how long the program has been running in 1/100s without a float
		+	ft %= 10; // keep the milliseconds from last time
		+	ft += frame_time*1000; // add the last passed time to it in milliseconds
		+	i += ft/10; // add it to the integer without the milliseconds
		+
		+	// Calculate how long the program has been running in 1/100s with a float
		+	f+=frame_time*100;
		+
		+	frame;
		+	Until(key(_ESC))
		+
		+	End
		+	</pre>
		+	Used in example: [[set_mode]](), [[write_int]](), [[write_float]](), [[key]](), [[frame_time]]
		+
	Let a [[process]] wait for a certain time by calling this function:		Let a [[process]] wait for a certain time by calling this function:
	<pre>		<pre>

Sandman: /* Example */

2008-01-21T00:09:49Z

Example

←Older revision		Revision as of 00:09, 21 January 2008
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	</pre>		</pre>

-	This can be done with a timer too, as is displayed [[timer#Example\|here]].	+	This can be done with a timer too, as is displayed [[timer#Example\|here]], along with an example on how to measure time using frame_time.

	{{Globals}}		{{Globals}}

Sandman: /* Definition */

2007-12-27T18:59:40Z

Definition

←Older revision		Revision as of 18:59, 27 December 2007
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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.

Sandman: New page: category:variables category:predefined category:global variables '''Up to Global Variables''' ---- == Definition == '''FLOAT''' frame_time '''Frame_ti...

2007-12-27T18:59:13Z

New page: category:variables category:predefined category:global variables '''Up to Global Variables''' ---- == Definition == '''FLOAT''' frame_time '''Frame_ti...

New page

[[category:variables]]
[[category:predefined]]
[[category:global variables]]

[[Global variables|'''Up to Global Variables''']]

----

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

This can be done with a timer too, as is displayed [[timer#Example|here]].

{{Globals}}