thunder and lightning : effect tips

BlitzMax Forums/BlitzMax Beginners Area/thunder and lightning : effect tips

DannyD

(Posted 2006) [#1]

I hoping to implement lightning in my project. Not a lightning strike but a white flash that fills the black screen momentarily. Not sure where to start, any tips?

Thanks in advance

Dreamora

(Posted 2006) [#2]

I would use lightblend and a white image, thats color I set from black to white and back with large steps to get it "flashy" enough.

DannyD

(Posted 2006) [#3]

Thanks for the info, anyone got some lightblend examples ?

tonyg

(Posted 2006) [#4]

samples/birdie/misc/lightimage

DannyD

(Posted 2006) [#5]

Ah yes, right under my nose.Thanks a lot.

tonyg

(Posted 2006) [#6]

Might be close to what you want...

Graphics 640,480
image:TImage=LoadImage("max.png")
While Not KeyHit(KEY_ESCAPE)
  Cls
  DrawImage image,0,0
  If MouseDown(1)
	  SetBlend lightblend
 	  SetAlpha 0.6
	  DrawRect 0,0,640,480
  	  SetBlend maskblend
      SetAlpha 1.0
  EndIf
Flip
Wend

Dreamora

(Posted 2006) [#7]

Why SetAlpha without Alphablend?
Is Alpha used on LightBlend?

DannyD

(Posted 2006) [#8]

Thanks nice Tony, Thanks.

tonyg

(Posted 2006) [#9]

Is Alpha used on LightBlend?

yes