light Need help to create good 2d fake light

[GBear]

hi everybody..

could you give me tips to create fake light?

i draw fake light like following image with blendMode..(i don't use shader here because it's slow on mobile).

it will be drawn on maps..

i wanna add good simple animation like intensity of light or  glittering 
 

i need good formula or function to draw good..


thx..

 

 

[GBear]

i set 'sine wave spectrum' first

 

var value = (Math.sin(this.frequency) + center)/(center+1)/this.amplitude + noise;

 

 

if center is 0
this formula range have -1 ~ 1

if center is 1
this formula range have 0 ~ 1

if center is 2
this formula range have 0.3 ~ 1

if center is 3
this formula range have 0.4 ~ 1

and frequency is like velocity; you can control speed

noise is noise 

noise = (Math.random()+Math.random()-1)/10;

it's looks better.. but not perfect..

i will do more.. 

thx.

[GBear]

Not Using Noise
not_using_noise.avi

Using Noise
using_noise.avi

[mattstyles]

The noisy one looks great, I think it works really well.

If anything, it could do with a little smoothing between frames, some of the jumps are quite extreme but fire is a little like that sometimes anyway.

[GBear]

@mattstyles thx..

matt~~ can you know about this issue?
 

 

[mattstyles]

@GBear I had a stab at the other question, not sure how much help my comment is though.

[GBear]

@mattstyles hi matt.. thx..

i red it..^^/ and  replied