| Particle Class |
The Particle class represents a particle moving in the unit box,
with a given position, velocity, Radius, and Mass. Methods are provided
for moving the particle and for predicting and resolvling elastic
collisions with vertical walls, horizontal walls, and other particles.
This data type is mutable because the position and velocity change.
Inheritance HierarchyNamespace: Algs4Net
Assembly: Algs4Net (in Algs4Net.dll) Version: 1.0.0.0 (1.0.0.0)
SyntaxC#
public class Particle : BasicVisual
The Particle type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | Particle |
Default constructor to be used with member initializers to set member
values
|
| Particle(DrawingWindow) |
Initializes a particle with a random position and velocity.
The position is uniform in the unit box; the velocity in
either direciton is chosen uniformly at random. Member initializers
will replace these random values. |
Properties| Name | Description | |
|---|---|---|
 | CollisionCount |
Returns the number of collisions involving this particle with
vertical walls, horizontal walls, or other particles.
This is equal to the number of calls to BounceOff(Particle),
BounceOffVerticalWall, and BounceOffHorizontalWall |
| Mass |
The particle's mass
|
| Radius |
The particle's radius
|
| Vx |
Velocity along x-coordinate
|
| Vy |
Velocity along y-coordinate
|
| X |
The X coordinate from the left
|
| Y |
The Y coordinate from the top
|
Methods| Name | Description | |
|---|---|---|
| BounceOff |
Updates the velocities of this particle and the specified particle according
to the laws of elastic collision. Assumes that the particles are colliding
at this instant. |
| BounceOffHorizontalWall |
Updates the velocity of this particle upon collision with a horizontal
wall (by reflecting the velocity in the Y-direction).
Assumes that the particle is colliding with a horizontal wall at this instant. |
| BounceOffVerticalWall |
Updates the velocity of this particle upon collision with a vertical
wall (by reflecting the velocity in the X-direction).
Assumes that the particle is colliding with a vertical wall at this instant. |
| Draw |
Draws the particle as a filled circle
(Overrides BasicVisualDraw.) |
| KineticEnergy |
Returns the kinetic energy of this particle.
The kinetic energy is given by the formula 1/2 MV2,
where M is the Mass of this particle and V is its velocity. |
| Move |
Moves this particle in a straight line (based on its velocity)
for the specified amount of time. |
| TimeToHit |
Returns the amount of time for this particle to collide with the specified
particle, assuming no interening collisions. |
| TimeToHitHorizontalWall |
Returns the amount of time for this particle to collide with a horizontal
wall, assuming no interening collisions. |
| TimeToHitVerticalWall |
Returns the amount of time for this particle to collide with a vertical
wall, assuming no interening collisions. |
| ToString |
Returns useful particle info for debugging
(Overrides ObjectToString.) |
RemarksFor additional documentation, see Section 6.1 of Algorithms, 4th Edition by Robert Sedgewick and Kevin Wayne.
This class is a C# port from the original Java class Particle implementation by the respective authors.
See Also