from nodebox.graphics import *
from nodebox.graphics.physics import Vector, Boid, Flock, Obstacle
flock = Flock(50, x=-50, y=-50, width=700, height=400)
flock.sight(80)
def draw(canvas):
canvas.clear()
flock.update(separation=0.4, cohesion=0.6, alignment=0.1, teleport=True)
for boid in flock:
push()
translate(boid.x, boid.y)
scale(0.5 + boid.depth)
rotate(boid.heading)
arrow(0, 0, 15)
pop()
canvas.size = 600, 300
canvas.run(draw)
# Add the upper directory (where the nodebox module is) to the search path.
import os, sys
sys.path.insert(0, os.path.join("..", ".."))
from nodebox.graphics import *
from nodebox.graphics.physics import Vector, Boid, Flock, Obstacle
# Flocking can be used to simulate birds, herds, or school of fish.
# Each "boid" in the flock adheres to a simple set of rules:
# - separation: steer to avoid crowding local flockmates,
# - alignment: steer towards the average heading of local flockmates,
# - cohesion: steer to move toward the average position of local flockmates.
# Create a new flock.
flock = Flock(30, x=50, y=50, width=500, height=500, depth=100.0)
flock.space(
30) # Set the space for each boid (influences boid separation forces).
flock.sight(70) # Set the line-of-sight for each boid
# (influences boid cohesion and alignment forces).
# Add some obstacles that the flock will need to evade.
for i in range(3):
o = Obstacle(x=random(50, 500), y=random(50, 500), radius=random(10, 70))
flock.obstacles.append(o)
def draw(canvas):
# Clear the previous frame.
# For fun, comment this out and observe the interesting flocking patterns.
canvas.clear()
from nodebox.graphics import *
from nodebox.graphics.physics import Flock
flock = Flock(40, 0, 0, 500, 500)
flock.sight = 300
def draw(canvas):
canvas.clear()
translate(250, 250)
rotate(canvas.frame)
rect(x=-50, y=-50, width=100, height=200)
canvas.fps = 30
canvas.size = 600, 400
canvas.run(draw)
