Simulación de Sistemas - TP3

File Generation

File generation is done randomly, without superposition.

To run the file generation:

python3 generator/input_generator.py -L 6 -N 101 -r 0.2 -m 0.9 -R 0.7 -M 2 -v 2 -retry 100

Where:

• L -> Area length
• N -> Amount of particles, without counting the big one (100 < N < 150)
• r -> Radius of small particles
• m -> Mass of small particles
• R -> Radius of big particle
• M -> Mass of big particle
• v -> Max velocity module
• retry -> Amount of retries in case of not finding spot for particle (the bigger the better, but take into account the time it takes)

Simulation

To run the simulation, the command is:

java -jar ./target/sds-tp3-1.0-SNAPSHOT-jar-with-dependencies.jar -sf ./parsable_files/static.txt -df ./parsable_files/dynamic.txt -t 100

Post Processing

Post processing is used to generate the XYZ file for the animation, it can be run like this:

python3 visualization/postprocess.py -t 0.1

Ovito Configuration

A configuration is included in the repository inside visualization/configuration.ovito, it might have some issues with the loading. The Boundary Limits might need adjustments.

Color Coding

In Pipelines(connection symbol), add a Color Coding modification.

Click the Color Coding modification added inside Modifications

Choose:

• Operates On -> Particle
• Input Property -> Mass
• Color Gradient -> Blue-White-Red
• End Value -> 2 (biggest mass)
• Start Value -> 0.9 (smallest mass)

Boundary Limits

In Pipelines(connection symbol), inside Data Source, click on Simulation Cell.

Choose:

• Dimensionality -> 2D
• Box Size Width -> 6
• Box Size Length -> 6
• Cell Origin -> [0, 0, 0]

Particle Display

In Pipelines(connection symbol), inside Visual Elements, click on Particles.

Choose:

• Shape -> Circle or Sphere (probably Circle gives better performance)

File Format

The format for the files is .XYZ, this means it follows the given format:

Number of Particles
Timeframe (integer)
Mass1    Radius1    PositionX1  PositionY1   VelocityX1   VelocityY1
...
MassN    RadiusN    PositionXN  PositionYN   VelocityXN   VelocityYN
Number of Particles
Timeframe (integer)
Mass1    Radius1    PositionX1  PositionY1   VelocityX1   VelocityY1
...
MassN    RadiusN    PositionXN  PositionYN   VelocityXN   VelocityYN
Number of Particles
Timeframe (integer)
Mass1    Radius1    PositionX1  PositionY1   VelocityX1   VelocityY1
...
MassN    RadiusN    PositionXN  PositionYN   VelocityXN   VelocityYN
Number of Particles
Timeframe (integer)
Mass1    Radius1    PositionX1  PositionY1   VelocityX1   VelocityY1
...
MassN    RadiusN    PositionXN  PositionYN   VelocityXN   VelocityYN
...

Using this format for the file, the column mappings used are Mass, Radius, Position and Velocity respectively.