#!/usr/bin/python

# read nff data from standart input and render image to render_nff.png

# see http://tog.acm.org/resources/SPD/

# only spheres and triangles are implemented

from raytracer import Raytracer, Camera, Light, Material, Sphere, NormalVertex, Triangle

from math import pi

import sys, Image

rt = Raytracer()

imagesize = (800, 600)

mat = Material(colour=(1.0, 1.0, 1.0))

f = sys.stdin

while True:

	line = f.readline()

	if line == "":

		break;

	ln = line.split()

	if ln[0] == 'v':	# Viewpoint location

		# from

		ln = f.readline().split()

		assert ln[0] == 'from'

		eye = (float(ln[1]), float(ln[2]), float(ln[3]))

		# at

		ln = f.readline().split()

		assert ln[0] == 'at'

		lookat = (float(ln[1]), float(ln[2]), float(ln[3]))

		# up

		ln = f.readline().split()

		assert ln[0] == 'up'

		up = (float(ln[1]), float(ln[2]), float(ln[3]))

		# angle

		ln = f.readline().split()

		assert ln[0] == 'angle'

		angle = float(ln[1])

		# hither

		ln = f.readline().split()

		assert ln[0] == 'hither'

		hither = float(ln[1])

		# resolution

		ln = f.readline().split()

		assert ln[0] == 'resolution'

		imagesize = (int(ln[1]), int(ln[2]))

		# set camera as specified

		cam = Camera(eye=eye, lookat=lookat, up=up)

		cam.setAngle(angle/180*pi)

		rt.setcamera(cam)

	elif ln[0] == 'b':	# Background color

		rt.setbgcolour((float(ln[1]), float(ln[2]), float(ln[3])))

	elif ln[0] == 'l':	# Light

		pos = (float(ln[1]), float(ln[2]), float(ln[3]))

		rt.addlight(Light(position=pos))

	elif ln[0] == 'f':	# Fill color and shading parameters

		colour = (float(ln[1]), float(ln[2]), float(ln[3]))

		mat = Material(colour=colour)

		mat.setPhong(0,float(ln[4]),float(ln[5]),float(ln[6]))

		mat.setTransmissivity(float(ln[7]),float(ln[8]))

	elif ln[0] == 's':	# Sphere

		center = (float(ln[1]), float(ln[2]), float(ln[3]))

		radius = float(ln[4])

		rt.addshape(Sphere(centre=center, radius=radius, material=mat))

	elif ln[0] == 'p':	# Polygon

		vertex_count = int(ln[1])

		vertices = []

		for i in range(vertex_count):

			ln = f.readline().split()

			vertex = (float(ln[0]), float(ln[1]), float(ln[2]))

			vertices.append(NormalVertex(vertex))

		rt.addshape(Triangle(vertices[0], vertices[1], vertices[2], mat))

		for i in range(vertex_count)[3:]:

			rt.addshape(Triangle(vertices[0], vertices[i-1], vertices[i], mat))

	else:

		print "Not implemented:", line

f.close()

data = rt.render(imagesize)

img = Image.fromstring("RGB", imagesize, data)

img.save('render_nff.png')