How to make nice openGL blended lines in cocos2d?

i've written an algorithm to create electricity using ccDrawLine function in cocos2d for iphone. Currently, the ccDrawLine is a simple wrapper method for drawing openGL lines on the fly.

My algorithm is sound and works as I want. But the problem is with the appearance of the electricity in general.

I have little openGL programming knowledge(hence the use of the wrapper) and I require the ccLines to be blended nicely and look like either lasers or electricity.

How c开发者_如何学Goan I go about doing this avoiding the use of openGL programming if possible, otherwise i'll need to learn it.

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you sample the surrounding pixels for each pixel of the area and average it out. This is the most basic way i know but it is not very fast so you could blend in 2x2 squares instead of 1x1 or even 4x4 and move over every iteration because for a nice effect you would do maybe 3 times.