spray.txt

--@name Spray
--@author Sparky
--@shared

-- The spray should be a 1024x1024 image
local sprayUrl = "https://dl.dropboxusercontent.com/s/3hbtg2lt7sc1qxq/dove.png"

local sprayHolo
if SERVER then
    sprayHolo = holograms.create(Vector(), Angle(), "models/holograms/plane.mdl", Vector(5))
    sprayHolo:suppressEngineLighting(true)
    
    net.receive("spray",function()
        local orientation = net.readMatrix()
        sprayHolo:setPos(orientation:getTranslation())
        sprayHolo:setAngles(orientation:getAngles())
        sprayHolo:setNoDraw(false)
        sprayHolo:emitSound("player/sprayer.wav")
    end)
    
    net.receive("getholo",function(len,pl)
        net.start("holo") net.writeEntity(sprayHolo) net.send(pl)
    end)
    
else

    if player()==owner() then
        hook.add("inputPressed","",function(key)
            if key==30 then
                local tr = owner():getEyeTrace()
                local pos = tr.HitPos
                local normal = tr.HitNormal
                local up
                if normal==Vector(0,0,1) then
                    up = Vector(0,1,0)
                else
                    up = (Vector(0,0,1) - normal*normal[3]):getNormalized()
                end
                local mat = Matrix()
                mat:setForward(-up)
                mat:setRight(normal:cross(up))
                mat:setUp(normal)
                mat:setTranslation(pos+normal)

                net.start("spray")
                net.writeMatrix(mat)
                net.send()
            end
        end)
    end

    local sprayMat = material.create("VertexLitGeneric")
    sprayMat:setInt("$flags", 256)
    sprayMat:setTextureURL("$basetexture",sprayUrl)

    net.receive("holo",function()
        net.readEntity(function(holo)
            if not holo then net.start("getholo") net.send() return end
            sprayHolo = holo
            hook.add("think","",function()
                pcall(sprayHolo.setMaterial, sprayHolo, "!"..sprayMat:getName())
            end)
        end)
    end)
    net.start("getholo") net.send()

end