Make and print right triangles

triangle.coffee

class RightTriangle
    constructor: (@angle) ->
        @angle = (@angle % 90) * Math.PI / 180

    print: (size) =>
        res = ""
        last = 0
        ot = Math.tan(@angle)

        for i in [0...size]
            if i == 0
                res += "|" + "`" + "-".repeat(d = Math.floor(Math.tan(@angle)))

            else
                t = (i + 1) * Math.tan(@angle)
                res += "|" + (if i == size - 1 then "_" else " ").repeat(d = Math.floor(t)) + (if d == last then "|" else (if d == last + 1 then "\\" else "`" + "-".repeat(Math.floor(ot - 1))))

            last = d
            res += "\n"

        return res
    
    sides: (size) =>
        return {
            h: size
            o: size * Math.sin(@angle)
            a: size * Math.cos(@angle)
        }

module.exports = RightTriangle