clone() overhaul / fix missing steps in line()

context/line.lua

@@ -4,7 +4,7 @@ local function round(n)
 end
 
 function mtscad.Context:line(x, y, z)
-    local steps = math.sqrt( (x*x) + (y*y) + (z*z) )
+    local steps = math.ceil( math.sqrt( (x*x) + (y*y) + (z*z) ) )
     for step=0,steps do
         local xi = round(x / steps * step)
         local yi = round(y / steps * step)

context/new.lua

@@ -3,16 +3,16 @@ local Context_mt = { __index = mtscad.Context }
 
 -- copy the current context
 function mtscad.Context:clone()
-    return mtscad.create_context(self.pos, self.rotation, self.nodefactory, self.param2)
+    return mtscad.create_context(self)
 end
 
 -- create a new context with given (optional) params
-function mtscad.create_context(pos, rotation, nodefactory, param2)
+function mtscad.create_context(opts)
     local self = {
-        pos = pos and vector.copy(pos) or vector.zero(),
+        pos = opts.pos and vector.copy(opts.pos) or vector.zero(),
-        rotation = rotation and vector.copy(rotation) or vector.zero(),
+        rotation = opts.rotation and vector.copy(opts.rotation) or vector.zero(),
-        nodefactory = nodefactory,
+        nodefactory = opts.nodefactory,
-        param2 = param2 or 0
+        param2 = opts.param2 or 0
     }
     return setmetatable(self, Context_mt)
 end

load.lua

@@ -34,7 +34,9 @@ minetest.register_chatcommand("scad", {
     func = function(name, modulename)
         local player = minetest.get_player_by_name(name)
         local ppos = player:get_pos()
-        local ctx = mtscad.create_context(vector.round(ppos))
+        local ctx = mtscad.create_context({
+            pos = vector.round(ppos)
+        })
 
         local fn, options
         local success, exec_err = pcall(function()