Add svg export for 2d mazes

.gitignore

@@ -1,4 +1,5 @@
 *.png
+*.svg
 *.scad
 *.blend1
 *.stl

main.lua

@@ -2,6 +2,7 @@ local a = require("./utils/ansi")
 local strings = require("./utils/strings")
 local debug = require("./utils/print_r")
 local calculations = require("./utils/calculations")
+
 local maze2d = require("./maze")
 local maze3d = require("./maze3d")
 local openscad = require("./openscad")
@@ -26,6 +27,8 @@ local settings = {
 	scale = 5,
 	inverted = true,
 	
+	colour = "#6495ED", -- Cornflower blue :D
+	
 	path_length = 2,
 	path_width = 1,
 	path_depth = 1
@@ -47,6 +50,7 @@ local function help()
 
 	]]..a.item("help")..[[             Displays this message
 	]]..a.item("maze")..[[             Generates a 2d maze
+	]]..a.item("maze_svg")..[[         Generates a 2d maze as an SVG file
 	]]..a.item("maze3d")..[[           Generates a 3d maze
 	]]..a.item("maze3d_openscad")..[[  Generates a 3d maze as an openscad file
 
@@ -59,7 +63,7 @@ local function help()
 	]]..a.item("-s	--seed")..a.value(" {string}")..[[		Sets the seed
 	]]..a.item("-f	--filename")..a.value(" {string}")..[[	Sets the output filename
 		]]..a.item("--no-invert")..[[		Don't invert the output [openscad output only]
-	]]..a.item("-m	--scale")..a.value(" {int}")..[[		Sets the scale of the output [openscad output only]
+	]]..a.item("-m	--scale")..a.value(" {int}")..[[		Sets the scale of the output [maze_svg, openscad output only]
 	]]..a.item("-l	--path-length")..a.value(" {int}")..[[	Sets the path length
 	]]..a.item("-y	--path-width")..a.value(" {int}")..[[	Sets the path width
 	]]..a.item("-z	--path-depth")..a.value(" {int}")..[[	Sets the path depth [3d only]
@@ -129,6 +133,17 @@ local function maze_text()
 	print("Generation completed in " .. time .. "ms.")
 end
 
+local function maze_svg()
+	local world, time = maze2d.generate_maze(
+		settings.seed,
+		settings.width,
+		settings.height,
+		settings.path_length,
+		settings.path_width
+	)
+	print(maze2d.make_svg(world, settings.width, settings.height, settings.scale, settings.colour))
+end
+
 local function maze3d_text()
 	local world, time = maze3d.generate_maze(
 		settings.seed,
@@ -173,6 +188,7 @@ end
 local mode_functions = {
 	["help"] = help,
 	["maze"] = maze_text,
+	["maze_svg"] = maze_svg,
 	["maze3d"] = maze3d_text,
 	["maze3d_openscad"] = maze3d_openscad
 }

maze.lua

@@ -1,3 +1,5 @@
+local svg = require("../utils/svg_writer")
+
 -------------------------------------
 -- Maze generation script
 -------------------------------------
@@ -31,6 +33,23 @@ function M.printspace(space, w, h)
 	end
 end
 
+function M.make_svg(space, width, height, scale, fill)
+	local result = { svg.start(width * scale, height * scale) }
+	for y = 0, height - 1, 1 do
+		for x = 0, width - 1, 1 do
+			if space[y][x] == "#" then
+				table.insert(result, svg.rect(
+					x * scale, y * scale,
+					scale, scale,
+					fill
+				))
+			end
+		end
+	end
+	table.insert(result, svg.finish())
+	return table.concat(result, "")
+end
+
 -- Initialise the world
 
 function M.generate_maze(seed, width, height, path_length, path_width)

utils/svg_writer.lua

@@ -0,0 +1,20 @@
+local M = {}
+
+function M.start(width, height)
+	return "<?xml version=\"1.0\" encoding=\"utf-8\"?>\
+<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\
+<!-- Generated by svg_writer which was written by Starbeamrainbowlabs -->\
+<!-- svg_writer is a port of SvgWriter, which was also implemented by Starbeamrainbowlabs in C# -->\
+<svg version=\"1.1\" x=\"0\" y=\"0\" width=\""..width.."\" height=\""..height.."\" xmlns=\"http://www.w3.org/2000/svg\">"
+end
+
+function M.finish()
+	return "</svg>"
+end
+
+
+function M.rect(x, y, width, height, fill)
+	return "<rect x=\""..x.."\" y=\""..y.."\" width=\""..width.."\" height=\""..height.."\" fill=\""..fill.."\" />"
+end
+
+return M