particles | Exercise in writing performant js | Data Visualization library

by sniok JavaScript Version: Current License: No License

X-Ray Key Features Code Snippets(3)Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | particles Summary

particles is a JavaScript library typically used in Analytics, Data Visualization, WebGL, D3 applications. particles has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

Fast particles simulation using only JS.

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Security

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Reuse

Support

particles has a low active ecosystem.

It has 4 star(s) with 0 fork(s). There are 3 watchers for this library.

It had no major release in the last 6 months.

particles has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of particles is current.

Quality

particles has no bugs reported.

Security

particles has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

particles does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

particles releases are not available. You will need to build from source code and install.

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particles Key Features

No Key Features are available at this moment for particles.

particles Examples and Code Snippets

Checks if two particles are equal

java

Lines of Code : 22

License : Permissive (MIT License)

Copy

@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Swarm other = (Swarm) obj;
		if (Double.doubleToLongBits(bestFitness) != Doub

Spawn particles .

java

Lines of Code : 4

License : Non-SPDX

Copy

public void spawnParticles() {
    LOGGER.info("Spawning particles");
    numberOfSpawnedParticles++;
  }

Get an array of all the particles in this panel .

java

Lines of Code : 3

License : Permissive (MIT License)

Copy

public Particle[] getParticles() {
		return particles;
	}

Community Discussions

Trending Discussions on particles

Applying particles package in R to ocean velocity

Ball to Ball Collision resolution Stick together

Speed of particle (on canvas) increases everytime I generate a new one. Is it due to requestanimationframe?

Optimize c++ Monte Carlo simulation with long dynamic arrays

Particles.js background not adjusting

Access outer object from inner object

How to use div for background in html

Uncaught TypeError: three__WEBPACK_IMPORTED_MODULE_2__.Float32Array is not a constructor

Is it possible (and how) to load SVG string in Phaser 3 instead of loading it from path/url?

How to simulate first passage time probability in python for a random walk?

QUESTION

Applying particles package in R to ocean velocity

Asked 2021-Jun-12 at 16:03

I am trying to apply an example from R "particles" package to ocean velocity data (kinetic energy). Example data is as follows:

...

ANSWER

Answered 2021-Jun-12 at 14:45

The problem is that kee is a vector and not a matrix. So ncol and nrow return as NULL instead of an actual number. Here is a smaller reproducible example of why it is failing:

Source https://stackoverflow.com/questions/67949397

QUESTION

Ball to Ball Collision resolution Stick together

Asked 2021-Jun-11 at 12:47

If have the following code which simulates a ball to Ball collision. My problem is, that the balls bounce against each other. I want to have the balls stick together like snow particles. Does anyone know how to do that?

...

ANSWER

Answered 2021-Jun-11 at 12:47

void resolveCollision(Particle& particle, Particle& otherParticle) {
    float xVelocityDiff = particle.speed.x - otherParticle.speed.x;
    float yVelocityDiff = particle.speed.y - otherParticle.speed.y;

    float xDist = otherParticle.pos.x - particle.pos.x;
    float yDist = otherParticle.pos.y - particle.pos.y;

    // Prevent accidental overlap of particles
    if (xVelocityDiff * xDist + yVelocityDiff * yDist >= 0) {

        // Grab angle between the two colliding particles
        float angle = -std::atan2(otherParticle.pos.y - particle.pos.y, otherParticle.pos.x - particle.pos.x);

        // Store mass in var for better readability in collision equation
        float m1 = particle.mass;
        float m2 = otherParticle.mass;

        // Velocity before equation
        glm::vec3 u1 = rotateVel(particle.speed, angle);
        glm::vec3 u2 = rotateVel(otherParticle.speed, angle);

        // Velocity after 1d collision equation
        glm::vec3 v1(u1.x * (m1 - m2) / (m1 + m2) + u2.x * 2 * m2 / (m1 + m2),
            u1.y,
            0.0);
        glm::vec3 v2(u2.x * (m1 - m2) / (m1 + m2) + u1.x * 2 * m2 / (m1 + m2),
            u2.y,
            0.0);

        // Final velocity after rotating axis back to original location
        glm::vec3 vFinal1 = rotateVel(v1, -angle);
        glm::vec3 vFinal2 = rotateVel(v2, -angle);

        // Swap particle velocities for realistic bounce effect
        particle.speed.x = vFinal1.x;
        particle.speed.y = vFinal1.y;

        otherParticle.speed.x = vFinal1.x;
        otherParticle.speed.y = vFinal1.y;
    }
}

Source https://stackoverflow.com/questions/67937097

QUESTION

Speed of particle (on canvas) increases everytime I generate a new one. Is it due to requestanimationframe?

Asked 2021-Jun-11 at 00:48

The aim is to use the class particle to create particles (upon the user clicking a button) and once that is running as it should be, to give the user some control over speed, gravity and some other things. The problem is that every time the user clicks to create a new particle, the speed increases.

I'm not sure why but when I demo it without having the requestanimationframe, it looks like it works as it should, but it's useless if it's not animated.

...

ANSWER

Answered 2021-Jun-10 at 23:23

I would check and see if its the fact that you are constantly running drawNewParticle as your animation function, I would put this (your particle creation function):

Source https://stackoverflow.com/questions/67928609

QUESTION

Optimize c++ Monte Carlo simulation with long dynamic arrays

Asked 2021-Jun-10 at 13:17

This is my first post here and I am not that experienced, so please excuse my ignorance.

I am building a Monte Carlo simulation in C++ for my PhD and I need help in optimizing its computational time and performance. I have a 3d cube repeated in each coordinate as a simulation volume and inside every cube magnetic particles are generated in clusters. Then, in the central cube a loop of protons are created and move and at each step calculate the total magnetic field from all the particles (among other things) that they feel.

At this moment I define everything inside the main function and because I need the position of the particles for my calculations (I calculate the distance between the particles during their placement and also during the proton movement), I store them in dynamic arrays. I haven't used any class or function,yet. This makes my simulations really slow because I have to use eventually millions of particles and thousands of protons. Even with hundreds it needs days. Also I use a lot of for and while loops and reading/writing to .dat files.

I really need your help. I have spent weeks trying to optimize my code and my project is behind schedule. Do you have any suggestion? I need the arrays to store the position of the particles .Do you think classes or functions would be more efficient? Any advice in general is helpful. Sorry if that was too long but I am desperate...

Ok, I edited my original post and I share my full script. I hope this will give you some insight regarding my simulation. Thank you.

Additionally I add the two input files

parametersDiffusion_spher_shel.txt

parametersIONP_spher_shel.txt

...

ANSWER

Answered 2021-Jun-10 at 13:17

I talked the problem in more steps, first thing I made the run reproducible:

Source https://stackoverflow.com/questions/67905839

QUESTION

Particles.js background not adjusting

Asked 2021-Jun-07 at 18:10

When I adjust my config for Particles.js, the background color/image do not change from how it comes. I am not sure what I have done wrong. Here is my code:

HTML:

...

ANSWER

Answered 2021-Jun-07 at 18:10

Source https://stackoverflow.com/questions/67876220

QUESTION

Access outer object from inner object

Asked 2021-May-31 at 16:17

I have 2 (incomplete) classes, Level and Object, in different files, that look like this

Object.h:

...

ANSWER

Answered 2021-May-31 at 16:17

Not sure if that's the best solution, but, thanks to @PeteBecker, I've added (and also found out, huh) include guard so now it looks like that:

Object.h:

Source https://stackoverflow.com/questions/67776493

QUESTION

How to use div for background in html

Asked 2021-May-30 at 07:47

Hi I am trying to build a website, and I am trying to use particles.js as my background and display the content in overlaying manner. However, it is displaying it on top of the page instead of the background. When I set its position as absolute, its changes the format of my website. How can I set that div as the background?

here how it changes the format of the website , when I set it as absolute

I have my background div id set as particles-js here is my code for base.html:

...

ANSWER

Answered 2021-May-30 at 07:35

You can try this but i am not sure if this works for you.

Source https://stackoverflow.com/questions/67758705

QUESTION

Uncaught TypeError: three__WEBPACK_IMPORTED_MODULE_2__.Float32Array is not a constructor

Asked 2021-May-26 at 18:39

For some reason I get an error above for the following code:

...

ANSWER

Answered 2021-May-26 at 18:39

THREE.Float32Array does not exist in three.js.

Change the line to be:

Source https://stackoverflow.com/questions/67703364

QUESTION

Is it possible (and how) to load SVG string in Phaser 3 instead of loading it from path/url?

Asked 2021-May-25 at 17:40

I have several SVGs in my code which I would like to use with Phaser (specifically for particles) without saving them into separate SVG files.

...

ANSWER

Answered 2021-May-25 at 17:40

Question was answered on Phaser 3 forum - https://phaser.discourse.group/t/is-it-possible-and-how-to-load-svg-string-in-phaser-3-instead-of-loading-it-from-path-url/9668

Source https://stackoverflow.com/questions/67677665

QUESTION

How to simulate first passage time probability in python for a random walk?

Asked 2021-May-20 at 23:01

I have a 2D random walk where the particles have equal probabilities to move to the left, right, up, down or stay in the same position. I generate a random number from to 1 to 5 to decide in which direction the particle will move. The particle will perform n steps, and I repeat the simulation several times.

I want to plot the probability F(t) of hitting a linear barrier located at x = -10 for the first time (the particle will disappear after hitting this point). I started counting the number of particles fp for each simulation that hit the trap, adding the value 1 each time I have a particle in the position x = -10. After this I plotted fp, number of particles hitting the trap for the first time, vs t, the time steps.

...

ANSWER

Answered 2021-May-20 at 23:01

First off, you are currently computing fp as the cumulative sum of all particles that crossed the trap. This number must inevitably be asymptotic to n. What you are looking for is the derivative of the cumulative sum, which is the number of particles crossing the trap per unit time.

A very simple change is necessary here in the second loop. Change the following condition

Source https://stackoverflow.com/questions/67622695

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install particles

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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