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local map_def={
example = {
p1x=168,
p1z=530,
p2x=780,
p2z=1016,
background="itm_example.png",
},
}
local itm_cache={}
local itm_pdata={}
local itm_conf_mindia=0.1
minetest.register_privilege("itm", { description = "Allows to display train map", give_to_singleplayer = true, default = false })
local function create_map_form_with_bg(d)
local minx, minz, maxx, maxz = math.min(d.p1x, d.p2x), math.min(d.p1z, d.p2z), math.max(d.p1x, d.p2x), math.max(d.p1z, d.p2z)
local form_x, form_z=10,10
local edge_x, edge_z = form_x/(maxx-minx), form_z/(maxz-minz)
local len_x, len_z=math.max(edge_x, itm_conf_mindia), math.max(edge_z, itm_conf_mindia)
local form="size["..(form_x+edge_x)..","..(form_z+edge_z).."] background[0,0;0,0;"..d.background..";true] "
local lbl={}
for pts, tid in pairs(advtrains.detector.on_node) do
local pos=minetest.string_to_pos(pts)
form=form.."box["..(edge_x*(pos.x-minx))..","..(form_z-(edge_z*(pos.z-minz)))..";"..len_x..","..len_z..";red]"
lbl[sid(tid)]=pos
end
for t_id, xz in pairs(lbl) do
form=form.."label["..(edge_x*(xz.x-minx))..","..(form_x-(edge_z*(xz.z-minz)))..";"..t_id.."]"
end
return form
end
local function create_map_form(d)
if d.background then
return create_map_form_with_bg(d)
end
local minx, minz, maxx, maxz = math.min(d.p1x, d.p2x), math.min(d.p1z, d.p2z), math.max(d.p1x, d.p2x), math.max(d.p1z, d.p2z)
local form_x, form_z=10,10
local edge_x, edge_z = form_x/(maxx-minx), form_z/(maxz-minz)
local len_x, len_z=math.max(edge_x, itm_conf_mindia), math.max(edge_z, itm_conf_mindia)
local form="size["..(form_x+edge_x)..","..(form_z+edge_z).."]"
local lbl={}
for x,itx in pairs(itm_cache) do
if x>=minx and x<=maxx then
for z,y in pairs(itx) do
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