genesis | R Documentation |
These functions are passed to the simulation and defines how the position and velocity of the particles are initiated. The default is to lay out the nodes in a phyllotactic arrangement (think sunflower seeds) and with no velocity, which is also the default in d3-force.
phyllotactic_genesis(radius = 10, angle = pi * (3 - sqrt(5))) predefined_genesis(x, y, x_vel = 0, y_vel = 0) bigbang_genesis(vel_min = 0, vel_max = 1) aquarium_genesis(width = 10, height = 10, vel_min = 0, vel_max = 1) petridish_genesis(max_radius = 10, vel_min = 0, vel_max = 1)
radius |
The radius modifier (will be multiplied by the square root of the index of the particle) |
angle |
The angular difference between two adjacent particles |
x, y |
The columns holding (or value of) the position coordinates |
x_vel, y_vel |
The columns holding (or value of) the velocity verlets |
vel_min, vel_max |
The bounds of the uniformly distributed velocities |
width, height |
The size of the rectangle holding the particles |
max_radius |
The size of the disc. |
A function that takes the particle graph and returns a list with a position and velocity element, each holding a matrix with two columns and a row for each particle giving the x and y position and velocity respectively.
phyllotactic_genesis()
: Initiates particles in a phyllotactic arrangement with zero velocity
predefined_genesis()
: Uses information from the node data to set position and velocity.
bigbang_genesis()
: Initiates particles at center position and a random velocity
aquarium_genesis()
: Places particles randomly in a rectangle and gives them a random velocity
petridish_genesis()
: Places particles randomly on a disc and gives them a random velocity
# A contrieved example graph <- tidygraph::create_notable('bull') genesis <- phyllotactic_genesis() genesis(graph) # Usually used as an argument to simulate graph |> simulate(setup = phyllotactic_genesis())
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