The Flock object is a list of Boid objects confined to a box area.
obstacle = Obstacle(x=0, y=0, z=0, radius=10) obstacle.x Tweaking the radius of the obstacle and the sight and speed of the boid can remedy this. Note: sometimes boids will be moving too fast to steer away when they perceive an obstacle, and fly through it. The Obstacle object can be used to add locations to the flock that the boids will avoid.
#Nodebox svg import update#
boid = Boid(flock, x=0, y=0, z=0, sight=70, space=30) boid.flock # Flock this boid belongs to.īoid.depth # Depth, relative between 0.0-1.0.īoid.heading # Bearing as an angle in 2D.īoid.dodge # True => very close to an obstacle.īoid.near(boid, distance=50) # True if boid is within distance.īoid.seek(vector) # Sets given Vector as target.īoid.update( # Update position with given forces. It has a radius of personal space that is used when calculating separation. It has a radius of sight that is used to find local flockmates when calculating cohesion and alignment.
The Boid object represents an agent in a Flock, with an (x,y,z)-position subject to different forces. The boids framework is often used in computer graphics to provide realistic-looking representations of flocks of birds and other creatures, such as schools of fish or herds of animals. Unexpected behavior, such as splitting flocks and reuniting after avoiding obstacles, can be considered emergent.
For example: from import Vectorīoids is an artificial life program, developed by Craig Reynolds in 1986, which simulates the flocking behavior of birds. The right operand can be either another Vector or a scalar. Vector objects can be used with math operators, either in-place with +=, -=, *= and /= or to return a new Vector with +, -, * and /. This is because (for example) a vector has multiple perpendicular vectors in 3D instead of one. Note: vector rotation works in 2D, so the z-axis will be ignored. v.draw(x, y) # Draws the vector at (x,y). V.cross(vector) # Returns cross product Vector. v.dot(vector) # Returns dot product as a float. V.in2D.angle_to(vector) # Returns angle between 2 vectors. V.in2D.rotated(degrees) # Returns rotated Vector.
V.in2D.rotate(degrees) # Rotates by degrees. V.in2D.normal # Returns perpendicular Vector. V.reversed # Returns reversed (opposite) Vector. V.distance2(vector) # Returns distance squared (faster). V.distance(vector) # Returns distance to vector. V.angle # Direction in 2D, if x,y,z != 0. V.length # Magnitude in 3D, if x,y,z != 0. v = Vector(x=0, y=0, z=0, length=None, angle=None) It is commonly used in computer graphics to define where something is going and how fast it is going. In the nodebox/ext/psyco/src/ folder, execute setup.py from the command line: > cd nodebox/ext/psyco/srcĪ Euclidean vector (sometimes called a geometric or spatial vector, or, as here, simply a vector) is a geometric object that has both a magnitude (or length) and a direction.
#Nodebox svg import for mac os x#
NodeBox module offers fairly stable functionality to add 2D dynamic effects to an animation, for example a school of fish that moves around fluidly, or a fountain that sprays particles.īecause of the mathematics involved, this module can benefit from installing Psyco.Ī version of Psyco precompiled for Mac OS X is included in NodeBox, you can also compile the source manually for other systems.
0 kommentar(er)
