Time based movement

[chriso]

I'm not used to a time based method, does anyone have any example code or tips?

Basically instead of moving a character by +1 or +2 (which just flies around the screen using the while loop), I want to control everything using a timer.

I couldn't seem to find anything specific searching the forums.

[KawaGeo]

Take a look at my code in LED Timer which comes with Lua Player distribution. This should give you some ideas how to use a timer.

Have fun!

[chriso]

Which example? I've only got a clock face one.

I've had a stab at trying to work out the frames per second. How does this look?

Code: Select all

col_white = Color.new(255,255,255)

timer = Timer.new()
timer:start()

counter = 0
fps = 0

while true do
	
	-- current time since timer started (milliseconds)
	now = timer:time()
	
	-- increase the frame counter
	counter = counter + 1
	
	-- if we are at 1 second
	if now > 1000 then
	
		-- frames per seconds = counter ?
		fps = counter
		
		-- reset
		timer:reset()
		counter = 0
		timer:start()
	end
	
	screen:clear()
	screen:print(10,10,"time:"..now, col_white)
	screen:print(10,20,"counter: "..counter, col_white)
	screen:print(10,30,"fps: "..fps, col_white)
	
	screen.waitVblankStart()
	screen:flip()
end

[imhotep]

see here

http://forums.ps2dev.org/viewtopic.php?p=39385#39385