Saved by PX8 Version 0.0.4 __lua__ -- firework particles -- this sample code shows -- how to make firework-style -- particles sound_load("./examples/assets/fireworks.wav") function _init() -- crate a table for -- particles particles={} end function _update() if btnp(4) then --spawn fireworks at --a random position boom(rnd(128),rnd(128)) end -- update particles updateparticles() end function _draw() cls() --draw particles drawparticles() --draw hint if there are --no particles if #particles==0 then print("press Z",50,100,5) end end function boom(_x,_y) sound_play("./examples/assets/fireworks.wav") -- crate 100 particles at a location for i=0,100 do spawn_particle(_x,_y) end end function spawn_particle(_x,_y) -- create a new particle local new={} -- generate a random angle -- and speed local angle = rnd() local speed = 1+rnd(2) new.x=_x --set start position new.y=_y --set start position -- set velocity based on -- speed and angle new.dx=sin(angle)*speed new.dy=cos(angle)*speed --add a random starting age --to add more variety new.age=flr(rnd(25)) --add the particle to the list add(particles,new) end function updateparticles() --iterate trough all particles for p in all(particles) do --delete old particles --or if particle left --the screen if p.age > 80 or p.y > 128 or p.y < 0 or p.x > 128 or p.x < 0 then del(particles,p) else --move particle p.x+=p.dx p.y+=p.dy --age particle p.age+=1 --add gravity p.dy+=0.15 end end end function drawparticles() --iterate trough all particles local col for p in all(particles) do --change color depending on age if p.age > 60 then col=8 elseif p.age > 40 then col=9 elseif p.age > 20 then col=10 else col=7 end --actually draw particle line(p.x,p.y,p.x+p.dx,p.y+p.dy,col) --you can also draw simpler --particles like this --pset(p.x,p.y,col) end end __gfx__ 00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 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