I have visited the site https://www.collectiveip.com/ and there is a very interesting graph-like object on the homepage which responds to mouse movement.
Can somebody suggest as to what is the object and what libraries are used to create similar objects?
If you right-click and look at the source, there are plenty of hints that the graph is drawn using three.js.
three.js is a 3D drawing library that simplifies coding WebGL scenes.
If you look at the source further, you can find that all the graphics is drawn in a javascript file called threejsgraph-(some_big_random_hash).js. Paste it into a pretty printer (google "javascript pretty printer") to make it more readable.
Basically the code creates a lot of random sprites with lines (path) connecting them then animate the camera based on mouse movement.
Related
I am thinking of this:
I would like to place some text over the bokeh like this:
The question is (a) how hard this is / if it has been done before so I don't have to recreate the wheel, and (b) how to implement it in JavaScript, perhaps in Three.js.
I haven't been able to find any examples of Depth of Field (DoF) or Bokeh for 3D text or just 3D lighting bokeh in Three.js or WebGL, which makes me wonder if it is too hard or not possible. It doesn't need to be highly optimized performant because I just want to generate bokeh images to save to a JPG file. Wondering how to go about this, if you could point me in the right direction.
I haven't been able to find any examples of Depth of Field (DoF) or Bokeh for 3D text or just 3D lighting bokeh in Three.js or WebGL, which makes me wonder if it is too hard or not possible.
three.js provides two DOF examples in the official repository. I recommend the second one since it's a bit more advanced shader. You will also notice that the example focuses the object that is hovered by the mouse.
In any event, implementing DOF is a post-processing task. So the idea is to render the scene and the respective depth information into render targets and then use and additional pass for the actual DOF effect.
https://threejs.org/examples/webgl_postprocessing_dof
https://threejs.org/examples/webgl_postprocessing_dof2
three.js R105
I am looking for some jquery plugin or any code examples for multiple spinning wheels or 360 degree rotation wheels. Attached is the demo image for which, I am looking for the solution, where all the wheel can be rotate and This is basically develop birthdate selection somewhat like desktop and mobile application...But I need for my web application. I am using PHP & Apache web server.
Thanks in advance for any idea or sameple code or similer solution to moving forward
-Himanshu
I don't know of any ready made solutions, but I can point you in two directions you can go:
You can make an image for each of the 3 different wheels with the correct sizes and next use css3 transformations to rotate the specific wheels with javascript ( https://developer.mozilla.org/en/CSS/transform#rotate )
The other option is to look into the html5 canvas tag and draw the wheels onto it by hand. Here is a tutorial which covers making a roulette game on a canvas tag, which is quite different from your requirements, but does describe the necessary techniques. http://www.switchonthecode.com/tutorials/creating-a-roulette-wheel-using-html5-canvas
Yes HTML5 canvas rotate() is the way to go with this. My site http://www.dougtesting.net has a winning wheel that uses canvas rotation, but only for one wheel image. The code is fully commented so you may find it a useful starting point.
For your project you would probably need multiple images that are rendered to the canvas and rotated to the desired angles. Also you will probably need to look in to a mouseDown, mouseMove, and mouseUp code to allow the user to drag the wheels to the desired locations, with the code being able to tell you the values pointed at (something the code in my winning wheel can also do).
I am not aware of a jQuery plugin that does exactly what you ask. In terms of browser compatibility, I recommend you to take a look at the excellent RaphaelJS JavaScript library. It allows you to draw and rotate a wheel using vector graphics. Best of all, this library is IE6+ compatible and works in most if not all modern webbrowsers, including tablets and mobile phones.
To ease the creation of the necessary vector graphics, you can draw the wheel in a vector image editor of your choice (e.g. Illustrator, Inkscape, etc..) and save the vector image as SVG file. A very convenient online companion tool called ReadySetRaphael takes an SVG file as input and produces the necessary JavaScript to draw the graphics automatically.
If you have the path of the vector graphic as an object in JavaScript, it is easy to rotate it with the Element.rotate() method.
Although I am not sure if a plugin exists for this purpose;In my current project we have made a context menu using the canvas api which is not that different from your requirement, if not a bit more complex. Therefore, I highly recommend using the HTML5 Canvas api to do this, if you are not restricted from it. You can use a few ideas from the interactive flower tutorial.
http://www.html5canvastutorials.com/labs/html5-canvas-interactive-flower/
This should help too if you're interested in bringing jQuery into play.
http://www.elated.com/res/File/articles/development/javascript/snazzy-animated-pie-chart-html5-jquery/
I'm about to jump into some simple game development with Javascript. I would like to one day transition to 3D development but for now am only going to be doing 2D "top down" objects.
I know that this isn't ideal but I feel like it will help me get familiar with the 3D "environment".
I am using Three.js as it appears to be very well developed and I like that it can do Canvas, WebGL and SVG. However, my very first problem I've come across is, I don't know how to "move" an object. Using just Canvas I can easily take an object I have rendered and modify it's .x or .y property to "move" it. However, for Three.js objects so far all I've found is object.rotation.x, etc. I can move the camera, but this doesn't work because I need objects to move individually.
So I guess what I'm looking for is any resources into Three.js for 2D development, or developing a 2D top-down game in a 3D environment.
The Getting Started article is pretty good.
LearningThree.js got a series on "let's make a 3D Game".
There is a nice searchable reference available too.
Note that the project moves super fast so the API might change
here and there, so keep an eye out on github and when you
update always read the change log to see if you need to update your code.
Gooduck!.
is it possible to create a website which would display in 3d similar to 3d games or movies? What if I were to modulate the website using some sort of css or webgl technique?
Something which i've found quite interesting is adjusting the angle of an image e.g:
Polarised would require APIs that don't exist (yet). You can however play with analglyphic techniques.
I made this 3d spinning cube (requires a browser with 3d transforms to work) that uses red cyan glasses to work: http://css3.bradshawenterprises.com/demos/3d.php
It kinda works!
Doing a 3d website is possible, but hard, using red/cyan anaglyph glasses. Getting 3d using active shutter glasses is perhaps theoretically possible, but almost certainly unfeasible without huge timing issues. Polarized glasses is impossible without using a projector with a split image lens and polarized filters (or two projectors).
Latest stable version of Chrome 9 now has built-in support for WebGL. Some of famous example will be Aquarium, Jellyfish and even Virtual globe.
I'm currently reading up on the canvas, but I'm finding it hard to find practical benefits of using canvas, when a lot can be done using simple css overlays/JavaScript (+ jquery lib).
This is probably because I don't know the FULL practicalities of using canvas.
Looking at this game:
http://www.pirateslovedaisies.com/
Could someone help explain how and why canvas is being used as opposed to just css?
This is a 4k js/canvas demo I wrote to experiment with the 2d context (here is a video if your browser doesn't work). I tested it only on chrome, opera, firefox, safari and nexus one browser.
Note that no external resources are loaded (i.e. the texture and the raytraced envmap are built dynamically), so this is just a single self-contained 4096 bytes HTML file.
You can do something like that with DIVs?
But indeed I agree that the game you linked IMO could be done also with DIVs; apparently there are no transformations - not even in the falling daisy loading scene - and the action areas for the pirates are just circles. Not sure but could be that even shooting only happens at fixed angles.
Canvas could have been used instead for:
Drawing general sloped lines and polygons (the map could be created dinamically from a compact description or could have been generated randomly). Shooting could be done at any angle...
Procedural image creation (e.g. textures or special pixel effects)
Gradients, texture mapping
General 2d matrix transforms
Of course a game using an image+DIVs approach is probably way easier to make (a lot of photoshop and simple xy animation).
Creating tons of HTML elements is extremely slow and memory-hungry. The canvas object is made for graphics operations and thus optimized for it. Besides that.. how would you draw a curve with plain HTML/CSS? ;)
Using <canvas> you have a per-pixel control of what's shown on the screen. You don't have to deal with specific browser CSS or DOM compatibility.
Also, that's actually a pretty similar programming model to 2D non-browser games, like those created using SDL o DirectDraw.
Here's a game I wrote in a few hours using Canvas; note that the scaling of the tiles, the anti-aliasing of the lines, is perfect. This would not be the case with image tiles that were being resized by the browser.
Click the tiles to rotate them in an attempt to make all connections. Click the row of buttons at the top for a new board of a different size; click the row of buttons below that for a new board with different numbers of connections.
The game concept is not mine, only the implementation.