import window
import math
import copy
from matrix import Matrix4x4, Matrix3x3
from vectors import Vector4d, Vector3d, Vector2d
from engine import Mesh
from triangle import Triangle

ui = window.Window(600, 600)
near_plane = 0.1
far_plane = 1000.0
fov = 90.0
#'''
tris =[
Matrix3x3(Vector3d(0.0,0.0,0.0),Vector3d(0.0,1.0,0.0),Vector3d(1.0,1.0,0.0)),
Matrix3x3(Vector3d(0.0,0.0,0.0),Vector3d(1.0,1.0,0.0),Vector3d(1.0,0.0,0.0)),
Matrix3x3(Vector3d(1.0,0.0,0.0),Vector3d(1.0,1.0,0.0),Vector3d(1.0,1.0,1.0)),
Matrix3x3(Vector3d(1.0,0.0,0.0),Vector3d(1.0,1.0,1.0),Vector3d(1.0,0.0,1.0)),
Matrix3x3(Vector3d(1.0,0.0,1.0),Vector3d(1.0,1.0,1.0),Vector3d(0.0,1.0,1.0)),
Matrix3x3(Vector3d(1.0,0.0,1.0),Vector3d(0.0,1.0,1.0),Vector3d(0.0,0.0,1.0)),
Matrix3x3(Vector3d(0.0,0.0,1.0),Vector3d(0.0,1.0,1.0),Vector3d(0.0,1.0,0.0)),
Matrix3x3(Vector3d(0.0,0.0,1.0),Vector3d(0.0,1.0,0.0),Vector3d(0.0,0.0,0.0)),
Matrix3x3(Vector3d(0.0,1.0,0.0),Vector3d(0.0,1.0,1.0),Vector3d(1.0,1.0,1.0)),
Matrix3x3(Vector3d(0.0,1.0,0.0),Vector3d(1.0,1.0,1.0),Vector3d(1.0,1.0,0.0)),
Matrix3x3(Vector3d(1.0,0.0,1.0),Vector3d(0.0,0.0,1.0),Vector3d(0.0,0.0,0.0)),
Matrix3x3(Vector3d(1.0,0.0,1.0),Vector3d(0.0,0.0,0.0),Vector3d(1.0,0.0,0.0))
]
#'''
#tris = Mesh()
def main():
	#tris.load_obj_file('teddy.obj')
	ui.thetax = 1
	ui.thetay = 1
	ui.window.bind('<Left>', left)
	ui.window.bind('<Right>', right)
	ui.window.bind('<Up>', up)
	ui.window.bind('<Down>', down)
	ui.window.bind('<ButtonPress-1>', mouse_start)
	ui.canvas.bind('<B1-Motion>', mouse_end)
	ui.canvas.old_coords = None
	ui.window.after(0, draw_scene)
	ui.show()

def left(event):
	ui.thetax -= .1
	draw_scene()
	
def right(event):
	ui.thetax += .1
	draw_scene()
	
def up(event):
	ui.thetay += .1
	draw_scene()
	
def down(event):
	ui.thetay -= .1
	draw_scene()
	
def mouse_start(event):
	ui.canvas.old_coords = event.x, event.y
	
def mouse_end(event):
	x, y = event.x - ui.width / 2, event.y - ui.height / 2#ui.canvas.old_coords[0] - event.x, ui.canvas.old_coords[1] - event.y
	if x < 0:
		ui.thetax -= .01
	else:
		ui.thetax += .01
		
	if y < 0:
		ui.thetay -= .01
	else:
		ui.thetay += .01
		
	draw_scene()
	#ui.theta += x / ui.width
	
def draw_scene():
	ui.canvas.delete("all")
	#ui.theta += .01 # scaling factor
	aspect_ratio = ui.height / ui.width
	
	projection_matrix = Matrix4x4.get_projection_matrix(fov, aspect_ratio, near_plane, far_plane)

	rotation_matrix_y = Matrix4x4.get_y_rotation_matrix(ui.thetax)
	
	rotation_matrix_x = Matrix4x4.get_x_rotation_matrix(ui.thetay)
	
	triangles = []
	
	for tri in tris:
		# Rotate on the z-axis
		row1 = rotation_matrix_y.multiply_3d(tri.row1)
		row2 = rotation_matrix_y.multiply_3d(tri.row2)
		row3 = rotation_matrix_y.multiply_3d(tri.row3)
		
		rotated_y = Matrix3x3(row1, row2, row3)
		# Rotate on the x-axis
		row1 = rotation_matrix_x.multiply_3d(rotated_y.row1)
		row2 = rotation_matrix_x.multiply_3d(rotated_y.row2)
		row3 = rotation_matrix_x.multiply_3d(rotated_y.row3)
		
		rotated_x = Matrix3x3(row1, row2, row3)
		# The offset into the screen
		translated = copy.copy(rotated_x)
		translated.row1.z += 3.0
		translated.row2.z += 3.0
		translated.row3.z += 3.0
		
		# Use cross-product to get the surface normal (a Vector3d)
		x = translated.row2.x - translated.row1.x
		y = translated.row2.y - translated.row1.y
		z = translated.row2.z - translated.row1.z
		line1 = Vector3d(x, y, z)
		
		x = translated.row3.x - translated.row1.x
		y = translated.row3.y - translated.row1.y
		z = translated.row3.z - translated.row1.z
		line2 = Vector3d(x, y, z)
		
		normal = line1.cross_product(line2)
		
		# Now we normalize the normal
		length = math.sqrt(normal.x * normal.x + normal.y * normal.y + normal.z * normal.z)
		normal.x /= length
		normal.y /= length
		normal.z /= length
		
		# Do we display this triangle?
		if normal.dot_product(translated.row1) < 0.0:
			# Lighting
			light = Vector3d(0, 0, -1) # Shining at the player.
			
			length = math.sqrt(light.x * light.x + light.y * light.y + light.z * light.z)
			light.x /= length
			light.y /= length
			light.z /= length
			
			dot_product = normal.dot_product(light)
			r = abs(int(255 * dot_product))
			
			# Scale into view
			row1 = projection_matrix.multiply_3d(translated.row1)
			row2 = projection_matrix.multiply_3d(translated.row2)
			row3 = projection_matrix.multiply_3d(translated.row3)		
			
			projected = Matrix3x3(row1, row2, row3)
			
			projected.row1.x += 1
			projected.row1.y += 1
			projected.row2.x += 1
			projected.row2.y += 1
			projected.row3.x += 1
			projected.row3.y += 1
			projected.row1.x *= .5 * ui.width
			projected.row1.y *= .5 * ui.height
			projected.row2.x *= .5 * ui.width
			projected.row2.y *= .5 * ui.height
			projected.row3.x *= .5 * ui.width		
			projected.row3.y *= .5 * ui.height
			
			t = Triangle(projected)
			t.color = r
			t.average = (t.coords.row1.z + t.coords.row2.z + t.coords.row3.z) / 3
			triangles.append(t)
			
	# Sort the triangles so they are drawn in order.
	triangles.sort(key=lambda r: r.average, reverse = True)
	
	for projected in triangles:
		r = projected.color
		coords = [projected.coords.row1.x, projected.coords.row1.y, projected.coords.row2.x, projected.coords.row2.y, projected.coords.row3.x, projected.coords.row3.y]
		ui.canvas.create_polygon(coords, fill=from_rgb(r, r, r), outline="black")
		
	ui.canvas.update()
	
	#ui.canvas.after(100, draw_scene)
	
def from_rgb(r, b, g):
	return "#%02x%02x%02x" %(r, g, b)
	
main()