local data = {}

local temp_ang = Angle(0,0,0)
local function rot(vec, yaw)
    temp_ang.y = yaw
    temp_ang.p = math.Rand(-10, 10) * 5
    vec:Rotate(temp_ang)

    return vec
end

local spread = 654
local up = Vector(0,0,1)

for i=0, 1024*21 do
    local pos = Vector(math.Rand(-spread, spread), math.Rand(-spread, spread), 0)

    local yaw = math.Rand(-180, 180)
    local height = (math.random() ^ 3) * 20 + 5
    local width = math.Rand(1, 5)
    local color = Color(math.random(255), math.random(255), math.random(255))

    table.insert(data, {color = color, normal = up, u = 1, v = -0, pos = pos + rot(Vector(0,width,0), yaw)})
    table.insert(data, {color = color, normal = up, u = 0, v = -0, pos = pos + rot(Vector(0,0,0), yaw)})
    table.insert(data, {color = color, normal = up, u = 0.5, v = -1, pos = pos + rot(Vector(0,width*0.5,height), yaw)})
end

local mesh = Mesh()
mesh:BuildFromTriangles(data)


local matrix = Matrix()
matrix:SetTranslation(Vector(-2456.2087402344, -8746.53125, -11823.96875))

local material = CreateMaterial("grass_lol_" .. os.clock(), "VertexLitGeneric",
{
    ["$basetexture"] = "models/props_swamp/tallgrass_01",
})

material:SetFloat("$alpha", 1)
--material:SetFloat("$translucent", 0)
material:SetFloat("$alphatest", 1)
material:SetFloat("$nocull", 1)
material:SetFloat("$vertexcolor", 1)

local lol = ClientsideModel("error.mdl")
lol:SetModelScale(0,0)

local function draw(yaw)
    matrix:SetAngles(Angle(0,yaw,0))
    matrix:SetTranslation(Vector(-2456.2087402344, -8746.53125, -11823.96875))
    matrix:Scale(Vector(1,1,4))

    cam.PushModelMatrix(matrix)
        render.CullMode(0)
        mesh:Draw()
        render.CullMode(1)
        mesh:Draw()
        render.CullMode(0)
    cam.PopModelMatrix()
end

hook.Add("PostDrawTranslucentRenderables", 1, function()

    lol:DrawModel()
    render.SetMaterial(material)
    draw(0)
    draw(180)
    draw(90)
    draw(-90)
end)