PixelLoader.txt

--@name PixelLoader
--@author Sparky
--@shared

--Load an image url, reads it, and builds a pixel matrix out of props with them

local url = "https://dl.dropboxusercontent.com/s/aqj4jaudbmjivoi/sprite4.png"
--local url = "https://dl.dropboxusercontent.com/s/50kt65i17n4j4mv/sprite3.png?dl=0"

-- Adjust these to change the pixel props
local pixel = "models/hunter/blocks/cube05x05x025.mdl"
local pixelAngle = Angle(90,90,0)
local pixelSize = 23.725

--[[local pixel = "models/jaanus/wiretool/wiretool_pixel_sml.mdl"
local pixelAngle = Angle(90,90,0)
local pixelSize = 1.908]]

if SERVER then
    hook.add("net","",function(n)
        if n=="data" then
            local w, h = net.readUInt(32), net.readUInt(32)
            net.readStream(function(data)
                local p = chip():getPos()
                local i = 1
                local props = {}
                for x=1, w do
                    for y=1, h do
                        local col = Color(string.byte(string.sub(data,i,i+2),1,3))
                        i=i+3
                        if col.r > 0 or col.g > 0 or col.b > 0 then
                            props[#props+1] = {pos = p+Vector(x-1, 0, h-y+1)*pixelSize, col = col}
                        end
                    end
                end
                i = 1
                hook.add("think","",function()
                    while quotaAverage()<0.1*quotaMax() and prop.canSpawn() do
                        if i>#props then timer.remove("SpawnProps") break end
                        local p = props[i]
                        local e = prop.create(p.pos, pixelAngle, pixel, true)
                        e:setColor(p.col)
                        e:setMaterial("debug/debugdrawflat")
                        e:setSolid(false)
                        e:setDrawShadow(false)
                        i=i+1
                    end
                end)
            end)
        end
    end)
elseif player()==owner() then
    local w, h
    render.createMaterial(url, function(t,_,w_,h_) w=w_ h=h_ end, function(t,_)
        if not t then print("Failed to load url "..url) return end
        hook.add("renderoffscreen","",function()
            render.selectRenderTarget(t:getName().."$basetexture")
            render.capturePixels()
            
            local data = {}
            for x=1, w do
                for y=1, h do
                    local c = render.readPixel(x-0.5, y-0.5)
                    data[#data+1] = string.char(c.r)..string.char(c.g)..string.char(c.b)
                end
            end
            net.start("data")
            net.writeUInt(w, 32)
            net.writeUInt(h, 32)
            net.writeStream(table.concat(data))
            net.send()
            
            hook.remove("renderoffscreen","")
        end)
    end)
end