RenderTween Easymode

This code has been declared by its author to be Public Domain code.

RenderTween Easymode by RifRaf

2009

Include this in your project and have tweening added with one function call. Simply have your game logic all called from your own UpdateGame() function. In your mainloop call CheckTween() and thats it. You set the FPS in the include files CONST GAMEFPS. Copied from Marks code. Ive reused it several times as an include.

;to use this as in include.. you must make youre main game loop in a function called updategame()
;so you call checktween() and inside checktween it calls updategame() for your game logic

;Include



;example main program
Include "tween.bb"
Graphics3D 800,600,0,2
Camera=CreateCamera()
Global Box=CreateCube()
PositionEntity camera,0,10,-10
PointEntity camera,box
PositionEntity Box,0,0,3

While Not KeyDown(1)
     CheckTween()
     RenderWorld (frametween)
     Flip 
Wend

Function UpdateGame()
 MoveEntity Box,0,0,.2
 TurnEntity Box,0,.5,0
End Function
;end main code example


;include code : tween.bb
;tween.bb
Global gameFPS = 60 ;your logic frames per second.. rendering will happen as fast as it can 
Global Frameperiod,Frametime,frameticks
framePeriod = 1000 / gameFPS
frameTime = MilliSecs () - framePeriod

Function checktween()
    Repeat
	frameElapsed = MilliSecs () - frameTime
	Until frameElapsed
	frameTicks = frameElapsed / framePeriod
	frameTween# = Float (frameElapsed Mod framePeriod) / Float (framePeriod)
    If frameTicks>7 Then frameTicks=7:frametime=MilliSecs() 
	For frameLimit = 1 To frameTicks
		        Updategame()
                UpdateWorld()
		If frameLimit = frameTicks Then CaptureWorld()
		frameTime = frameTime + framePeriod
      Next

End Function

Comments

Andy

2009

Nice idea

Santiworld

2009

hi, i trying to understand this code, what is the basic concept?

no more than x amount of renderworld depending on the fps?, but the updategame() "all game data" run more times than the renderworld?

RifRaf

2009

yes, updategame will happen x frames per second. While renderworld will happen as many times as possible without lowing Game Logic below desired FPS. Rendered with a tween value between frames , so it will be smooth as possible.

_PJ_

2009

What's the significance of '7' ?

If frameticks>7 Then frameticks=7:Frametime=MilliSecs()

RifRaf

2009

frameTicks = frameElapsed / framePeriod

7 is from what I gather, the optimal deadzone value to check against. Ive tried to change it and the results werent any good.

Nexinarus

2012

Ive used tweening before again using the layout from the "castle.bb" that came with blitz3d. I still prefer using it in the main loop the way it originally was in the example, but thats just me. That is why I made a tweening bb and backed it up for future projects and examples Thats good enough for me.

Sorry for straying off course

My point is having it in a function is a cool idea but noobies could easily run into complications with variables. But then again I guess thats what types and arrays and globals are for.

To each their own. But I do think it is a cool idea. And if it works for you... All the power to you.

RifRaf

2012

That was sort of pointless..

Species

2015

I just use the Castle Demo tweening as a basis.

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