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#!/usr/bin/python



import vamos_track

import random

import sys





class random_road (vamos_track.vamos_track):

    '''A track made from segments with random lengths, radii, and elevations'''



    # Adjustables

    length_range = [15.0, 350.0]

    angle_range = [-140.0, 140.0]



    def __init__ (self, total_length):

        vamos_track.vamos_track.__init__ (self, False)

        self.straight_weight = 2 # Curve and straight are equally likely  

        self.total_length = total_length



    def long_enough (self):

        return self.length >= self.total_length



    def build_track (self):

        self.add_segment (self.first_segment_length, 0.0) 

        last_radius = 0.0

        while not self.long_enough ():

            length = vamos_track.random_in_range (self.length_range)

            radius = 0.0

            type = random.randint (1, self.straight_weight);

            if type == 1: # curve

                angle = vamos_track.random_in_range (self.angle_range)

                radius = vamos_track.angle_to_radius (angle, length)

                self.straight_weight *= 3 # Straight will be more likely next

                if last_radius * radius > 0.0:

                    self.add_segment (20.0, 0.0)

            else: # straight

                self.straight_weight = 1 # Next segment will be a curve

            self.add_segment (length, radius)

            last_radius = radius



seed = 0

if len (sys.argv) == 2:

    print (sys.argv)

    seed = int (sys.argv [1])

else:

    seed = random.randrange (0, 2**64)

print (seed)

random.seed (seed)



track = random_road (10000)

track.construct ()

track.write_track ('/tmp/random-road.xml')