itch.io

Star Flow Effect

function Start()
    stars = {}
end
function Update()
    for i = 1, #stars do
        stars[i] = nil
    end
    minx, miny, maxx, maxy = 10000, 10000, 0, 0
end
function UpdateS()
    stars[#stars+1] = shape
    local pos = shape.OriPos
    minx = math.min(minx, pos.x)
    miny = math.min(miny, pos.y)
    maxx = math.max(maxx, pos.x)
    maxy = math.max(maxy, pos.y) 
end
function LateUpdate()
    if #stars > 3 then
        --local cx = (minx + maxx) / 2
        --local cy = (miny + maxy) / 2    
        local delta = (maxx + maxy - minx - miny) / 3
        --print(cx .. " - " ..  minx .. " - " .. maxx)
        for i = 1, #stars do
            local shape = stars[i]
            local ofs = shape.Offset
            ofs.z = ofs.z - delta
        end
    end
end
function End()
    stars = nil
end