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learning three.js: day 06 - particles

welcome to day 06 of your three.js journey! in this tutorial, we will explore how to create and manipulate particle systems in three.js. particles can be used for various effects, such as simulating smoke, fire, or even stars in a night sky.

what are particles?

in computer graphics, particles are small objects that can be used to represent various phenomena. they are typically rendered as points or small sprites and can be combined to create complex visual effects.

setting up your environment

before we dive into the code, make sure you have a basic three.js setup. if you haven't done so yet, create an html file and link to the three.js library. you can use a cdn for this purpose.



creating a basic particle system

in this example, we'll create a simple particle system that emits particles from a central point and makes them move upwards.

1. **set up the scene**: create the scene, camera, and renderer.
2. **create a particle geometry and material**.
3. *create a particle system* and add it to the scene.
4. **animate the particles**.

here is the code for `app.js`:



explanation of the code

1. **scene, camera, and renderer**: we create a basic scene with a perspective camera and a webgl renderer.
2. **particle geometry**: we create a `buffergeometry` to hold the particles' positions. the positions are randomized within a certain range.
3. **particle material**: we use `pointsmaterial` to render the particles. the color is set to white, and we specify a small size for each particle.
4. **particle system**: a `points` object is created from the geometry and material, and it is added to the scene.
5. **animation loop**: in the `animate` function, we update each particle's vertical position to simulate upward movement. when a particle exceeds a certain height, it is reset to the bottom.

conclusion

congratulations! you've just created a simple particle system using three.js. you can experiment with different particl ...

#Threejs #Particles #axios
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