Screen Shake - GameCreators Forum

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Behdadsoft

15

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Joined: 7th Apr 2009

Location: Tehran-Iran

Posted: 9th Jul 2016 12:07

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Hi.

I want make shake camera in my 2d game. but I don't know how can do it.
is anyone to help me?

Thanks.

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Thestroyer

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Joined: 14th May 2016

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Posted: 9th Jul 2016 12:45

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the command FixSpriteToScreen() can help. I dont know if you can move the sprite with setSpritePosition afterwards, but if it's not possible you have to turn FixSpriteToScreen() on for all sprites when you want the screen to shake and then move the screen with SetViewOffset() and then turn FixSpriteToScreen() off for all sprites.
If you can move the sprites when they are fixed to the screen you can just turn it on once for all the sprites and if you want the screen to shake you move the screen with SetViewOffset().

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BatVink

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Joined: 4th Apr 2003

Location: Gods own County, UK

Posted: 9th Jul 2016 14:46

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I wrote a tutorial and drop-in module here.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Quidquid latine dictum sit, altum sonatur
TutCity is being rebuilt

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Behdadsoft

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Joined: 7th Apr 2009

Location: Tehran-Iran

Posted: 9th Jul 2016 19:19

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Thanks Thestroyer.

Thanks BatVink for Your tutorial.

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easter bunny

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Joined: 20th Nov 2012

Playing: Dota 2

Posted: 11th Jul 2016 04:14

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Here are some functions I've been using for camera shake:

+ Code Snippet

type shakeT
	rad as float
	offsetX as float
	offsetY as float
	randomAngle as float
	lastTime as float
endtype

global shaking as integer
global shaks as shakeT

+ Code Snippet

function Shake()
	if shaking=1
		shaks.rad = 0.6
		shaks.lastTime=timer()
		shaks.randomAngle = random(0,360)
		shaks.offsetX = sin(shaks.randomAngle) * shaks.rad
		shaks.offsetY = cos(shaks.randomAngle) * shaks.rad //create offset 2d vector
		SetViewOffset(shaks.offsetX,shaks.offsetX)
		shaking=2
	elseif shaking=2
		if timer()-shaks.lastTime>0.1
			shaks.lastTime=timer()
			shaks.rad=shaks.rad*0.95 //diminish radius each frame
			shaks.randomAngle=random(1,360)
			shaks.offsetX = sin(shaks.randomAngle) * shaks.rad //create offset 2d vector
			shaks.offsetY = cos(shaks.randomAngle) * shaks.rad //create offset 2d vector
			SetViewOffset(shaks.offsetX,shaks.offsetY)
			if shaks.rad<0.2 then shaking=3
               endif
	elseif shaking=3
		SetViewOffset(0,0)
		shaking=0
	endif
endfunction

Just call Shake() every frame [ ie right before Sync()]. When you want to shake the screen just use 'shaking=1'.