Questions tagged [simulation]
The simulation tag has no usage guidance.
61 questions
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Multi-user time based simulation - deploying new version without downtime
I am making a multiplayer strategy simulation game. The game runs in turns of fixed duration, e.g. 1 minute.
For every user, there is a set of state variables that can change every turn, e.g. amount ...
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52
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How to handle variables for simulation? One, or multiple class, or maps?
I am trying to write a simulation that has multiple (20+) variables, which the user should be able to control without modifying the source code. Currently I'm stuck between two design choices: Should ...
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3
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159
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How to pass simulation information to a simulated device that uses a generic interface?
Currently, I am developing a software in C# (.NET 6) that tests devices after production. Therefore, it runs specific tests, e.g., voltage measurements, using the connected hardware. If the voltages ...
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Best way to implement traffic light/intersection in 2D tile-based traffic simulation
I've been building a traffic simulation with C++ following the Intelligent Driver Model from this article: https://towardsdatascience.com/simulating-traffic-flow-in-python-ee1eab4dd20f
To sum up my ...
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2
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200
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physical simulation: design thoughts
I'm an applied physics student and currently working on a simulation of the magnetic interactions of multiple protons within a protein.
Me having only little experience with programming and almost ...
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267
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Design of A Multithreaded Simulator
When designing my simulator, I have gotten stuck on 2 main design choices.
The simulator can be described as having X number of nodes (between 50 - 2000) that each need to independently do some ...
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5
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229
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Should I "modularize" my configuration file into different files?
I have a simulation in Python which reads its configuration from a toml file. Since I have tons of parameters, the toml file can grow quite large.
This is an example file, similar in structure to my ...
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3
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186
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Writing a growing simulation that scales
Or ways to get better run time than a nested loop?
How would you design this?
I hope this is the place to ask semi-vague software engineering questions.
My simple simulation is like this:
There is a ...
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120
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Can the results of a Discrete-Event Simulation be translated to a Continuous-Time visualization?
I am composing a library for Discrete-Event Simulation of vehicle traffic. Vehicles are modelled as agents, while the network is modelled as a set of interconnected edges and nodes (a bidirectional ...
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2
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745
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How to implement a rule-based decision maker for an agent-based model?
I have a hard time understanding how to combine a rule-based decision making approach for an agent in an agent-based model I try to develop.
The interface of the agent is a very simple one.
public ...
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2
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85
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Pros and cons of position as properties of a spatial object?
Building games and simulation frameworks, it seems I am regularly hounded by this conundrum:
Let's say you have a 2D grid, and you have an crate in that grid. I can put the coordinates on the crate, ...
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3
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577
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Birthday Paradox, Analytical and Monte Carlo solutions give two systemically slightly different results [closed]
I was doing a Monte Carlo implementation of the Birthday Paradox in Python and I wanted to check if the results where the same as in the analytical implementation of the same problem (As they should ...
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2
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585
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Best practices for testing settings file with many parameters in simulation code
I'm conflicted as to what is the best way to approach this problem.
I am writing a simulation in Python, which is parametrized by ~ 50 parameters. I have a JSON file where these parameters are set, ...
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6
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11k
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Is there a way to speed up a big switch statement?
As a practice I'm working on a CPU simulator (runs at about 1.78MHz) and I'm using a switch statement to execute correct opcodes based on the value in the IR (instruction register) variable. This ...
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31
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The optimal way to simulate vision detection from limited visual field
I need to build an experiment based on a scientific paper in which a high number of agents have a divided visual field (with limited detection distance) and have to detect other agents in a 2D ...
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1
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147
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Architecting a predictive modeling software
I have a predictive model which runs 10,000+ scenarios to predict the outcome. It's a micro-simulator model for an insurance company. The data part is almost static with changes from time-to-time, ...
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Algorithm - Simulation of a soccer match
I'm implementing an App for fun. It consists of a soccer round-robin tournament simulator in which all teams play each other. A Team consists in a simple object:
class Team{
String _teamName;
...
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202
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Passing messages through a chain of containers in python
When I write python code for simulations, I often end up with the following situation: I have a class describing the general environment which contains a list of instances of a class that describes ...
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97
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Logic circuit simulation: homebrew or third party solution?
Software I'm working on requires simulation of logic circuits, both combination and sequential.
Now the simulation doesn't need to be too detailed, in fact it could be detrimental to the function of ...
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89
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Simulating Comparison Without Using Comparison Primitives
In the same way that you can simulate the if statement and functions, I am wondering if there is a way to simulate the comparison operators ==, !=, >, >=, <, <=.
For example, in ...
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223
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How to Implement a `function` with `return` Without Using the `function` keyword
Along the lines of How to Simulate Control-Flow without using Control-Flow Primitives, I am wondering how to simulate return from a function.
Given an example setup like this:
console.log(a(10))
...
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74
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Displaying periodic simulations via web interface
The gist of my problem is that I'm trying to make a basic simulation for periodically collected data.
More specifically, given the position of a radio antenna, the RF patterns would be simulated ...
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63
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Program Simulation Techniques
I've noticed that data-flow analysis uses approximations of a programs steps by simulating the value flow in some way (which I don't fully understand yet). They describe it well here. On page 4 they ...
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Massive Simulator Software Architecture [closed]
I am looking to perform a large overhaul on a complex simulation system that simulates several instances of several vehicle models in a classroom training environment. For example, 24 students may be ...
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Good practice to store runtime data
Cheers guys,
I am quite new to C++, however, I have some years of experience in programming and I am open for challenges :-)
Currently, I am designing a "small" scientific program to perform some ...
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790
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Design Pattern similar to ESB
Background
I am trying to write a simulator where multiple AI agents are competing and/or collaborating to achieve the goal of maximizing some utility function.
Each agent has the ability to interact ...
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3
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297
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How to simulate living things in software [closed]
I was thinking about creating a simple game/simulation where cars drive around in a city as part of a pet project.
That made me think how I would simulate these individual cars in a simulated world. ...
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126
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How should I represent an object whose instances share the same set of member function identifiers, but those identifiers specify different behaviors?
I'm attempting to develop an open-source Python module for modeling task networks for discrete event simulation. The most fundamental component is the task object, which includes various data such as ...
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3
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3
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565
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How to create simulator for distributed algorithms written in simple language
I started development of simulator for simulation of distributed algorithms in language C. My work consist of creating simple language for algorithm description and simulator which takes the described ...
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528
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When implementing Monte Carlo Tree Search for TicTacToe, do I simulate won states?
I'm trying to debug my MCTS implementation for TicTacToe (it doesn't block obvious wins for the opponent). I was wondering what the algorithm should do if it expands to a node which is a game over ...
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344
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Good design for modular computational physics code in Fortran
I'm currently working on a computational physics code in Fortran. In summary, the code performs the following operations:
Initialize
Loop until done
Advance solution over time
Possibly write output
...
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52k
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What algorithm is used by elevators to find the shortest path to travel floor orders?
I'm trying to simulate an elevator, as always I started very simple by taking only a single order at a time, then added memory to the elevator in the form of queues so that floors are traveled in the ...
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380
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Running simulations in parallel, managing each separately [closed]
Let me preface this by admitting that I am a novice - this is the first real project I am doing outside of a class.
I am running a single-threaded C++ simulation several hundred times (i.e. I have ...
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Linking two or more different programming languages
I would like to ask how optimizer software written in C/C++ can be linked to simulator software written in FORTRAN or any other language. I have copied the section of journal article of Singh and ...
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Parking Simulation Software Design
I've been requested to develop a quite well known problem for a job interview. The Parking Simulation which an example can be found here.
I came up with some ideas for which design pattern should I ...
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685
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Simulating a Production Line
I'm trying to simulate a DVD production line in Java. The thing I have a problem with is the calculation of the time in this kind of simulation and the number of DVDs per hour.
The production line ...
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modelling an ecosystem evolving on a landscape
I would like to understand a bit more the theory and the approaches available in modelling a population roaming across a landscape. Assume discrete time and space as simple as a discrete grid and a ...
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Implementing a VM for simulation [closed]
I am aware of this question, and I think I know why it has been closed. I hope that my question manages to be more specific.
My skill level: I have a "Computer Science" degree. I have programmed in ...
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Using a global struct with pthreads in C [closed]
I'm trying to simulate clients going into a bank and being served by tellers over a period of time. I am using a thread to determine if a client came into the bank via an arrival rate and am using ...
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No repeated coordinates in random walker ensemble
i'm simulating an ensemble of random walkers in 2D in python, I set [x,y] coordinates of my walkers to be gaussian in a 2D grid, then use a rand array of -1 and +1 to move up down left right:
N=20 #...
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How to predict a future simulation state
We have a program that combines the simulation of an aircraft system and predefined pedagogical scenarios for trainee pilots to learn how to use this system.
When we follow the normal scenario, ...
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1
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156
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How to define the motion path of one object on a surface of the other one?
I have an uncommon problem. There are 2 3D objects, which are represented by arrays of vertices and triangles (.stl files). Each of them contains a big enough amount of vertices: 1-10 mln ones. The ...
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Looking to simulate the rolling of a ball around a roulette wheel, while the resulting number is already known
I want to make a roulette board with a ball spinning and landing on a certain field.
The catch is that the field the ball will land on, is known beforehand.
I want the animation to look somewhat ...
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How should I handle measurement logging in my Discrete Event Simulation engine?
I'm attempting to build a Discrete Event Simulation library by following this tutorial and fleshing it out.
How should I handle logging metrics in my Discrete Event Simulation engine?
If you don't ...
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How to simulate an ATM terminal in a POS
Recently I started same projects to improve my programming skills, so I tried to develop a point of sale software. I started to bay the required hardware (ticket printer, Barcode Scanner….) to make my ...
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Design pattern for method to accept one of several static items in C#?
I want to illustrated my question by way of a (hopefully) representative example.
Lets say I have a situation where I am developing a class library in C# to be used in some simulations. I want to ...
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101
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Determinining "value" in multi-agent microeconomical simulation
I am trying to determine an objective way for a self-interested agent to calculate the optimal buying/selling price for goods in a multi-agent simulation not dissimilar to Sugarscape (http://en....
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3
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216
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Microeconomical simulation: coordination/planning between self-interested trading agents
In a typical perfect-information strategy game like Chess, an agent can calculate its best move by searching the state tree for the best possible move, while assuming that the opponent will also make ...
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993
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Shuffling algorithm with no "self-mapping"?
To randomly shuffle an array, with no bias towards any particular permutation, there is the Knuth Fischer-Yeats algorithm. In Python:
#!/usr/bin/env python
import sys
from random import randrange
...
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Algorithm to Find the Aggregate Mass of "Granola Bar"-Like Structures?
I'm a planetary science researcher and one project I'm working on is N-body simulations of Saturn's rings. The goal of this particular study is to watch as particles clump together under their own ...
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