Flocking VII

Flocking

This is an attempt at using d3-force to control flocking behavior. As of right now, it is still under construction.

~~This example is an implementation of a simple flocking algorithm that uses the dynamics of repulsion, attraction, and orientation zones. This example is based off of the algorithm described by Couzin.~~

~~The basic principle is that each agent has three regions in a growing radius around it: a zone of repulsion, a zone of orientation, and a zone of attraction respectively. By editing the sizes of these zones you can expect to experience different behaviour.~~

~~This example allows you to see the behavior when two types of agents are used, allowing you to specify parameters for each group.~~

Parameters:

There are two basic types of parameters used: initial conditions and agent parameters. Agent parameters can be updated any time, including while in play. Initial conditions however require a reset before they take effect.

Note: If an initial condition is changed then the Reset button will turn yellow, indicating that a reset is required before some changes take effect.

Initial Conditions:

• Agents: The number of agents to simulate
• Sparsity: The spacing between agents at start, where higher numbers correspond to the agents being spaced further apart.
• Distribution: The distribution between Group 1 and Group 2 agents. Agents from the second group are rendered as the larger dots.
• Metric: The metric type used for the respective group for their zones of attraction. The two options are:
• distance: The agent uses a zone of attraction, specified by the radius
• knn: The agent uses the k nearest neighbors outside of the zone of orientation for their attraction vector.

Agent Parameters:

• Zr: The radius of the zone of repulsion
• Zo: The radius of the zone of orientation
• Za: The radius of the zone of attraction (distance metric only)
• k: The number of neighbors outside of the zone of orientation to use for the attraction vector (knn metric only)
• s: The speed, or the distance per iteration an individual agent travels
• θ: The turn rate (between [0, 180]) where the agent can not adjust their direction vector greater than this number for an individual iteration

Color Key:

• Black: point is not being influenced by any other points (no points in any zones)
• Red: point is being repulsed (contains points in its zone of repulsion)
• Blue: point is being influenced by attraction forces only (contains points only in its zone of attraction)
• Lawn Green: point is being influenced by orientation forces only (contains points only in its zone of orientation)
• Turquoise: point is being influenced by both attraction and orientation forces (cointains points in both its zone of attraction and zone of orientation)

Controls:

• Use the Play button to start animation
• Use the Pause button to stop animation
• Use the Next button to do one time step of the algorithm.
• Clicking a point toggles display of its zone radii.
• While paused, points can also be dragged around and positioned.

Dragging/Zooming behavior forked from mbostock's block: Drag & Zoom II

forked from lwthatcher's block: Directional Forces

forked from lwthatcher's block: Flocking

forked from lwthatcher's block: Flocking II

forked from lwthatcher's block: Flocking III

forked from lwthatcher's block: Flocking IV

forked from ojaneeo's block: Flocking IV

forked from lwthatcher's block: Flocking V