lightning and fog shader

Shaders
1

i know nothing about shaders other than there is alot of them i dont understand and i was wondering how to make a fog or lightning bckground or even both please help

2

@Ray_Spahn - please don’t start a new thread for every comment

I’ve written an ebook on shaders here

https://www.dropbox.com/sh/mr2yzp07vffskxt/AACqVnmzpAKOkNDWENPmN4psa

Please take note that you need to be reasonably competent in Codea, and you will also need some basic understanding of C. Shaders are not for beginners!

3

This is the class i use to draw random lightning bolts from my shmup space ship ( as weapon )

The code was mainly grabbed out of some code samples going over the forum.
Maybe it’s a good starting point as it was for me

PlayerLightning = class()

function PlayerLightning:init(pos,pos2,Nplayer,beamtype)
    self.pos = pos
    self.target = pos2
    self.x = self.pos.x 
    self.y = self.pos.y + 30
    self.player = Nplayer
    self.beamtype = beamtype or 0
    self.type = 9
    self.timer = 255
    self.pow =  0.3
    self.powerupval = 0
    self.variation = vec2(260,100)
    table.insert(self.points,vec2(self.pos.x,self.pos.y))
    for i = 1,10 do
        table.insert(
            self.points,
            vec2(
                self.points[i].x+(math.random()-.5)*self.variation.x,
               self.points[i].y+math.random()*self.variation.y
            ))
    end
end

function PlayerLightning:draw()
    self.timer = self.timer - 15
    pushStyle()
    fill(255,255,255)
    stroke(math.random(100,120),30, math.random(120,255), self.timer)
    strokeWidth(3)
    for i,v in ipairs(self.points) do
        if self.points[i+1] then
            line(v.x,v.y,self.points[i+1].x,self.points[i+1].y)
        end
    end
    
    popStyle()
    
end