Stack Overflow
Stack Overflow

Questions tagged [particles]

Particle in computer graphics usually refers to the small, simple images or 3D models (meshes) that are governed by and make up a particle system, usually used to depict a fuzzy object (e.g. fire, smoke, glowing trail left behind by a meteor).

Particle (in computer graphics)

Particles are small units that together represent a fuzzy object in a particle system. Over time the system generates particles, which move and change from the origin of creation (or emission) and eventually die or fade away. Link to academic paper

Particle can have a different meaning depending on if the field is computer graphics, nanotechnology, or physical sciences

788 questions
4
votes
3 answers

particle system: particle generation

I have a system that generates particles from sources and updates their positions. Currently, I have written a program in OpenGL which calls my GenerateParticles(...) and UpdateParticles(...) and displays my output. One functionality that I would…
Myx
  • 1,792
  • 5
  • 23
  • 37
4
votes
0 answers

Define a path (custom direction) for particles of an emitter

I'm using Qt5.3 and I'm using QtQuick.Particles2.0 system to show fluid motion inside a pipe by an emitter and defining a direction. For a straight line of pipe, I have no problem to show the particles inside the pipe (since it's just a target…
Mosi
  • 1,178
  • 2
  • 12
  • 30
4
votes
1 answer

How to use the .p files created from Libgdx particle editor in my Android game

I have created a .p file using Libgdx particle editor by downloading libgdx-nightly-latest.zip using this https://www.youtube.com/watch?v=LCLa-rgR_MA tutorial. Now in my Android project i have added gdx.jar and gdx-backend-android.jar as…
T B
  • 191
  • 4
  • 22
4
votes
0 answers

OpenGL: Geometry Shader performance with a lot of cubes

So I wrote a really simple OpenGL program to draw 100x100x100 points drawn as cubes using the Geometry Shader. I wanted to do it to benchmark it against what I could currently do using DirectX11. With DirectX11, I can easily render these cubes at…
riandrake
  • 41
  • 3
4
votes
1 answer

opengl modelling rocket flame and vapour trails with particles

Does anyone have any guidance for coding an approximation for the particle stream coming out of a jet engine (with afterburner) in opengl using particles drawing using vertex buffers / 4f color buffers? I believe there are two aspects to this…
acheo
  • 3,106
  • 2
  • 32
  • 57
4
votes
1 answer

Particles in Qt

Description of my app I'm trying to show a nice timeline animation of how bikeracks in a city are affected by traffic (every rack is a dot, that gets more towards green as it's filled up, more towards red as it becomes more empty etc) What I have…
Arnab Datta
  • 5,356
  • 10
  • 41
  • 67
4
votes
2 answers

CAEmitterLayer VERY SLOW

I am designing a particle system using Apple's CAEmitterLayer and CAEmitterCell and everything is going GREAT on the iPhone5 and simulator. But as soon as I run it on an iPhone4S the particle system kills the FPS. Now I tried decreasing the amount…
Parad0x13
  • 2,007
  • 3
  • 23
  • 38
3
votes
2 answers

Alpha transparency with particle effects in OpenGL

I have a simple particle effect in OpenGL using GL_POINTS. The following is called, being passed particles in order from the particle furthest from the camera first to the one nearest the camera last: void draw_particle(particle* part) { /* The…
ICR
  • 13,896
  • 4
  • 50
  • 78
3
votes
2 answers

XNA Particle system performance

I have a particle system using basic spritebatch, where the particles are being created and destroyed based on decremental alpha value till 0. The perfomance of the system is quite poor on pc, and very poor on xbox, with about a hundred particles…
Paul
  • 55
  • 7
3
votes
5 answers

cocos2d starting particles from a specific time in the future

I am developing a cocos2d based app with a space background in which I am exploiting a CCQuadParticleSystem to make blinking stars. I have generated this particle system with ParticleDesigner. As soon as I load the particle system white dots…
Andrea Sindico
  • 7,358
  • 6
  • 47
  • 84
3
votes
1 answer

Are there any iOS Particle System Libraries

Does anyone know of any (opensource would be nice) Particle / Emitter libraries for iOS? I know of cocos iphone but couldn't find any others. If all else fails I'll get my hands dirty and learn OpenGL but any helper libraries would be handy :)
Finne
  • 150
  • 3
  • 8
3
votes
1 answer

Pygame: How to make two objects stop moving once they collide

I'm attempting to make a simulation by generating particles (mainly circles) in pygame. One objective is to have the particle move randomly on the screen and once they collide, they should stick to each other and stay in their fixed position. I…
Kevin Nitièma
  • 33
  • 3
3
votes
3 answers

Electric force between particles using numpy arrays

I am trying to simulate a particle flying at another particle while undergoing electrical repulsion (or attraction), called Rutherford-scattering. I have succeeded in simulating (a few) particles using for loops and python lists. However, now I want…
Jelmer Mulder
  • 99
  • 9
3
votes
2 answers

Prevent explosion particle effect clipping through terrain

I have implemented blast particle within my game but when it spawns, it gets cutout to correspond to the nearest environment object. This problem, I was getting: Overall there are multiple particle systems are running to achieve this but I am…
Siddharth
  • 4,142
  • 9
  • 44
  • 90
3
votes
3 answers

OpenGL lighting small objects?

I'm having a problem with lighting when dealing with really small particles. I'm doing particle-based fluid simulation and am right now rendering the fluid as really tiny polygonized spheres (by really tiny I'm saying about 0.03 units radius for the…
Nitrex88
  • 2,158
  • 2
  • 21
  • 23
1 2 3
…
52 53