From: Markus Koenig <markus@...>
Date: 2005-10-28T04:22:06+09:00
Subject: Re: ASCII Isometric Graphics...

CBlair1986 wrote:

> I've just got a bit of a question, here. I suppose my mind's a bit too
> tired to think of a solution at the moment, but it's been on my mind
> for a while. What I'd like to do is take an array and turn it into an
> isometric view of the data, eg:
> 
> [...]

Heh, another Ruby quiz. ;)


class Array
	def isowidth
		first.first.length
	end

	def isodepth
		first.length
	end

	alias isoheight length

	# returns a isometric representation as a String
	# give the value representing "true" as a parameter
	def isometric(truevalue = true)
		# build the graphic lines
		ascii_width = isowidth * 6 + isodepth * 2 + 1
		ascii_height = isoheight * 3 + isodepth * 2 + 1
		ascii = Array.new(ascii_height) {
			" " * ascii_width
		}

		# traverse all bricks
		0.upto(isoheight-1) do |y|
			0.upto(isodepth-1) do |z|
				(isowidth-1).downto(0) do |x|
					# only draw certain bricks
					next if self[y][z][x] != truevalue

					# calculate the coordinates
					xa = x * 6 + z * 2
					ya = (isoheight-y-1) * 3 + z * 2

					# "draw" the brick
					ascii[ya][xa, 7]   = '+-----+'
					ascii[ya+1][xa, 8] = '|\\     \\'
					ascii[ya+2][xa, 9] = '| +-----+'
					ascii[ya+3][xa, 9] = '+ |     |'
					ascii[ya+4][xa+1, 8] = '\\|     |'
					ascii[ya+5][xa+2, 7] = '+-----+'
				end
			end
		end

		# join the lines
		return ascii.join("\n")
	end
end


data = [[[1, 1],
         [1, 1]],
        [[0, 1],
         [0, 0]]]

puts data.isometric(1)


Have fun,
Markus