mirror of
https://github.com/nasa/trick.git
synced 2024-12-21 06:03:10 +00:00
26 lines
894 B
Markdown
26 lines
894 B
Markdown
# SIM_contact
|
|
|
|
SIM_contact simulates the motion, and the collisions of any arbitrary numbers of moving balls.
|
|
|
|
Each ball is defined by a position, velocity, radius, and mass.
|
|
|
|
Collisions are purely elastic. In addition to conserving momentum, they also conserve kinetic energy.
|
|
|
|
A graphics client allows you to see the balls in motion:
|
|
|
|
|
|
|
|
## Examples
|
|
The configuration for the above display is:
|
|
|
|
```
|
|
dyn.contact.nballs = 2
|
|
dyn.contact.balls = trick.TMM_declare_var_1d("Ball*", dyn.contact.nballs)
|
|
dyn.contact.balls[0] = trick.make_Ball(0.0, 0.0, 0.5, 0.0, 0.5, 1.0)
|
|
dyn.contact.balls[1] = trick.make_Ball(3.0, 0.0, -0.5, 0.0, 0.5, 1.0)
|
|
```
|
|
|
|
The initial state of the first ball is pos=<0.0, 0.0>, vel=<0.5,0.0>, radius=0.5, and mass=1.0.
|
|
|
|
The initial state of the second ball is pos=<3.0, 0.0>, vel=<-0.5,0.0>, radius=0.5, and mass=1.0.
|