running

Running

You're very welcome to run this workshop yourself. If you use significant parts of it, do mention this in event descriptions on websites, e.g. "...based on jtruk's demoscene workshop". This is welcome, but not necessary for social media promotion.

Please drop me a line if you do so (see the bottom of this page). I'd be keen to promote your event, and also to gather any improvements.

Intro

• Make sure everyone has a running version of TIC-80 (part way down tic-80 Create page)
• Anyone susceptible to photosensitity
• Outline of workshop
  • Become familiar with TIC-80
    • Drawing primitives
    • sin/cos
    • poke palette
    • full screen effect
  • History of the demoscene
  • Showcasing some demoscene things
  • Jumping off points
• Level of programming experience (above 7 / below 3)
• Anyone know about the demoscene?

Primitives and structures

cls, rect, tri, circ, line, elli, pix, print (rectb, trib, circb, ellib)

function, for, var, if

function TIC()
    T=time()/500

	cls(8)

    for i=0,30 do
        x=(i^7)%240
        y=(i^5)%68
        pix(x,y,12)
    end

	circ(	
		120+math.sin(T)*100,
		90-math.cos(T)*80,
		20,
		4)

	rect(0,68,240,68,6)

	rect(50,40,80,60,2)
	tri(40,40, 90,10, 140,40, 1)
	
	for x=10,230,10 do
        if x<150 or x>=180 then
            drawPicket(x)
        end
	end			
end

function drawPicket(x)
	line(x,90, x,110, 12)
end

Sin/Cos

local ATAN2=math.atan2
local PI=math.pi
local TAU=PI*2
local SIN=math.sin

function TIC()
	T=time()

 for y=0,135 do
	 for x=0,239 do
		 local p=y*240+x
			local dx=120-x
			local dy=68-y
			local d=(dx^2+dy^2)^.5
			local a=(ATAN2(dy,dx)+PI)/TAU
			poke4(p,a*16+T*.001)
	 end
 end
end

Contact Me

Please get in touch:

• Mastodon