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ab-particles
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Asif Bacchus 2020-04-10 12:50:16 -06:00
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@ -11,13 +11,13 @@ Very simple, lightweight animated particles display that **does not** require an
- Colours are all set by CSS variables so theme integration is easy, no custom functions to write or libraries to figure out.
- All features are enabled/configured based on parameters passed directly to the javascript function.
- Mouse effects (only 2... for now):
- Particle replusion
- Particle repulsion
- Connection-line highlighting with configurable colour
## Usage (simple)
1. Download the release file.
2. Edit your HTML to include a canvas with *ID* 'particles'. You can put the canvas anywhere you'd like, but I'd strongly recommend putting it at the end of your *body*.
2. Edit your HTML to include a canvas with *ID* 'particles'. You can put the canvas anywhere you'd like, but I'd strongly recommend putting it at the end of the *body*.
```html
...
@ -25,7 +25,7 @@ Very simple, lightweight animated particles display that **does not** require an
</body>
```
3. Every particles implementation I've seen relies on it being full-window. This one is no different, all the calculations are done under that assumption. Therefore, we should remove the canvas from the DOM-flow and make it full width and height. Your CSS should look something like this:
3. Every particles implementation I've seen relies on it being full-window. This one is no different, all the calculations are done under that assumption. Therefore, we should remove the canvas from the document flow and make it full width and height. Your CSS should look something like this:
```css
#particles {
@ -33,7 +33,7 @@ Very simple, lightweight animated particles display that **does not** require an
top: 0;
left: 0;
height: 100%;
width: 100%
width: 100%;
z-index: -999;
}
@ -70,7 +70,7 @@ variable|purpose|default
---|---|:---:|
--col-particle|Colour of the particle itself (little circle).|black (#000000)
--col-particle-stroke|Colour of the connecting lines.|black (#000000)
--col-particle-stroke-hover|Colour of connecting lines on mouse hover.|red (#ff0000)
--col-particle-stroke-hover|Colour of connecting lines on mouse hover. You do not need to define this at all if you set the *hover* parameter to *false*|red (#ff0000)
You can set these variables as follows (I'm setting them on the root element). In this example, I'm setting a few shades of blue:
@ -84,80 +84,80 @@ You can set these variables as follows (I'm setting them on the root element). I
## Setting feature parameters
Everything that can be customized about the script is done via parameters passed directly to the *particles()* function. This avoids any need for configuration files and makes it easy to remember how to make changes. If you screw up a parameter's settings, the script will just use it's internal defaults and will display a helpful message to the console which you can view by turning on your 'developer tools'.
Everything that can be customized about the script is done via parameters passed directly to the *particles()* function. This avoids any need for configuration files and makes it easy to remember how to make changes. If you screw up a parameter's setting, the script will just use it's internal defaults and will display a helpful message on the console which you can view by turning on your 'developer tools'.
All parameters have default settings so *none* of them are required. Also, since this is javascript, the particles are *cAsE seNsiTiVe*. The order does *not* matter. These are all the available parameters, what they do and their default settings.
All parameters have default settings so *none* of them are required. Also, since this is javascript, the parameters are *cAsE seNsiTiVe*. The order does *not* matter. These are all the available parameters, what they do and their default settings.
parameter|purpose|allowed values|default
---|---|:---:|---
opacity|Overall opacity of the canvas element itself including all contents.|0 - 100|100
numParticles|Number of particles displayed in the window.<br/>Calculated as a pecentage-multiple of the window width. For example, if the window is 500px wide and numParticles=10, 50 particles will be drawn.<br/>**Do not set this number too high or you can crash the browser!**|finite number|10
numParticles|Number of particles displayed in the window.<br/>Calculated as a percentage-multiple of the window width. For example, if the window is 500px wide and numParticles=10, 50 particles will be drawn.<br/>**Do not set this number too high or you can crash the browser!**|finite number|10
sizeMultiplier|Random multiplier between 0 and this number that is applied to vary the size of the particles so they aren't all uniform.|finite number|5
width|Stroke width (px) of connector lines.|integer|1
connections|Whether or not to connect the particles to each other when they get close enough.|boolean|true
connectionDensity|How likely and densely particles connect to each other.<br/>**Careful not to set this number too high or you can crash the browser!**|finite number > 1|15
connectionDensity|How densely particles connect to each other.<br/>**Careful not to set this number too high or you can crash the browser!**|finite number > 1|15
speed|How quickly the particles bounce around the window|1 < integer < 1000|50
hSpeed|How quickly the particles move horizontally. Positive values move to the right, negative to the left. This overrides the value of 'speed'.|-1000 < integer < 1000|1
vSpeed|How quickly the particles move vertically. Positive values move down, negative move up. This overrides the value of 'speed'.|-1000 < integer < 1000|1
avoidMouse|Should particles be repelled away from the mouse?|boolean|true
hover|Should connection lines change colours when the mouse is near then?|boolean|true
hover|Should connection lines change colours when the mouse is near them?|boolean|true
## Examples
### default settings (explicit)
Random balanced horizontal and vertical motion bouncing off the edges of the window. Particles are repelled by the mouse and connections are highlighted on hover.
Random balanced horizontal and vertical motion bouncing off the edges of the window. Particles are repelled by the mouse and connections are highlighted on hover. [Sample](defaults.html)
```html
<body onload='particles(opacity=1, numParticles=10, sizeMultiplier=5, width=1, connections=true, connectionDensity=15, speed=50, hSpeed=1, vSpeed=1, avoidMouse=true, hover=true)>
<body onload='particles(opacity=100, numParticles=10, sizeMultiplier=5, width=1, connections=true, connectionDensity=15, speed=50, avoidMouse=true, hover=true)'>
```
### starry night
Freeze the display, remove connections, disable mouse interaction. Creates a random assortment of particles that will change on each reload.
Freeze the display, remove connections, disable mouse interaction. Creates a random assortment of particles that will change on each reload. [Sample](starrynight.html)
```html
<body onload='particles(speed=0, connections=false, avoidMouse=false, hover=false)>
<body onload='particles(speed=0, connections=false, avoidMouse=false, hover=false)'>
```
### snow
No horizontal movement, connections or mouse interaction. Particles fall straight down.
No horizontal movement, connections or mouse interaction. Particles fall straight down. [Sample](snow.html)
```html
<body onload='particles(hSpeed=0, vSpeed=100, connections=false, avoidMouse=false, hover=false)>
<body onload='particles(hSpeed=0, vSpeed=100, connections=false, avoidMouse=false, hover=false)'>
```
### bubbles
Opposite of snow, looks a little like bubbles.
Opposite of snow, looks a little like bubbles. [Sample](bubbles.html)
```html
<body onload='particles(hSpeed=0, vSpeed=-100, connections=false, avoidMouse=false, hover=false)>
<body onload='particles(hSpeed=0, vSpeed=-100, connections=false, avoidMouse=false, hover=false)'>
```
### warp speed to the right
Moving right would make the particles go left, therefore negative movement. We don't want connections or mouse interaction here either.
Moving right would make the particles go left, therefore negative movement. We don't want connections or mouse interaction here either. [Sample](warpright.html)
```html
<body onload='particles(vSpeed=0, hSpeed=-100, connections=false, avoidMouse=false, hover=false)>
<body onload='particles(vSpeed=0, hSpeed=-100, connections=false, avoidMouse=false, hover=false)'>
```
### warp speed to the left
Moving left would make the particles go right, therefore positive movement. We don't want connections or mouse interaction here either.
Moving left would make the particles go right, therefore positive movement. We don't want connections or mouse interaction here either. [Sample](warpleft.html)
```html
<body onload='particles(vSpeed=0, hSpeed=100, connections=false, avoidMouse=false, hover=false)>
<body onload='particles(vSpeed=0, hSpeed=100, connections=false, avoidMouse=false, hover=false)'>
```
### my usual settings (nice background effect)
I use this for screens where I can't figure out a meaningful background, so why not generate something nice to look at?
I use this for screens where I can't figure out a meaningful background, so why not generate something nice to look at? [Sample](index.html)
```html
<body onload='particles(speed=15, avoidMouse=false)>
<body onload='particles(speed=15, avoidMouse=false)'>
```
## Advanced loading
@ -170,7 +170,7 @@ I've included the proper checksums to use when loading either version of the scr
### addEventListener
If you want to load the script via a javascript file instead of using an inline *onload* attribute in your HTML, you can do it like this:
If you want to load the script using a javascript file instead of an inline *onload* attribute in your HTML, you can do it like this:
```javascript
window.addEventListener('load', function(){
@ -178,18 +178,18 @@ window.addEventListener('load', function(){
}, false);
```
Again, I recommend using *load* instead of something like *DOMContentLoaded* since this script reads colour variables from the CSS.
Again, I recommend using *load* instead of something like *DOMContentLoaded* since this script reads colour variables from CSS.
## Notes
- I use *position: fixed* in my CSS but you can just as easily use *position: absolute*. It makes no difference. The key is setting the canvas object to cover the entire window starting at the top left (0,0) and covering 100% height and width.
- The *z-index* is set to a very low number so that the canvas falls behind everything else. Otherwise, you'll get particles floating over your text and interfering with pointer-events like links!
- Certain parameters can overload the browser by drawing too many particles and/or calculating too many connections. Don't pick crazy numbers and you'll be fine.
- *numParticles* is a multiplier. The script takes 1% of the screen width and sets that as the number of particles it will generate multiplied by the value of *numParticles*. It is because this is a multiplier that you need to be careful about setting high values!
- I don't really like most of the popular animations such as clicking to add more particles or 'grabbing' particles on hover/click. As such, I have not iplemented these animations. Let me know if this is something you want!
- *numParticles* is a multiplier. The script takes 1% of the window width and sets that as the number of particles it will generate multiplied by the value of *numParticles*. It is because this is a multiplier that you need to be careful about setting high values!
- I don't really like most of the popular animations such as clicking to add more particles or 'grabbing' particles on hover/click. As such, I have not implemented these animations. Let me know if this is something you want!
## Final thoughts
I put this together pretty quickly to generate a less boring background for a login page I was working on. As such, I didn't really add many bells and whistles. I wanted to keep it pretty lean and focussed. Also, this is one of the first javascript projects I've decided to 'release into the wild' for others to use. So, I'd love any feedback, suggestions and improvements you have to offer! I'm a horrid programmer so don't worry, I won't be offended by any critcism and look forward to maybe learning a few things from your suggestions!
I put this together pretty quickly to generate a less boring background for a login page I was working on. As such, I didn't really add many bells and whistles. I wanted to keep it pretty lean and focussed. Also, this is one of the first javascript projects I've decided to 'release into the wild' for others to use. So, I'd love any feedback, suggestions and improvements you have to offer! I'm a horrid programmer so don't worry, I won't be offended by any criticism and look forward to maybe learning a few things from your suggestions!
Hope you find this useful. Please file issues/suggestions in the *issues* section.