Another take on Nadieh Bremer mesmerizing Breathing Earth visualisation, running at 60fps on a 2D Canvas without libraries or frameworks.
The weekly data are provided by VIIRS geo files from NOAA STAR. Using Canvas ImageData, it was straight forward to render the vegetation health, or “greenness” across the planet.
The Canvas has a pale yellow backround to see the arid areas through. The ImageData is white on the water masses and dark green on the land masses. Setting the alpha channel of each data point allows to shift between the dark green of the lush areas and to see through the pale yellow background of the arid areas. To get smooth animation, the data of two consecutive weeks are linearly interpolated.
By popular demand, and to be true to the original Breathing Earth, the data are also rendered as little discs of radius 1, 2 and 3. The circles are drawn in additive blending mode, which makes the land masses "greener". To compensate the accumulation of "greenness", there is a final pass mixing the exact value of each data point with the value of the circles overlapping it.
This approach cruises at 60 frames per second on a mid-range laptop.
Click or tap the picture of the earth to start/pause the animation.
This was an interesting exersize to test this approach and see the performance one can get out of plain 2D Canvas and ImageData. Hope you liked this little project.
Other recent projects
There are many experiments and projects like BREATHING EARTH to discover other here.
- MUSIC FOR TINY AIRPORTS AT WEB AUDIO CONFERENCE The Web Audio Conference 2018, held in September 19-21 in Berlin was a great mix of researchers, web developers, artists and performers presenting their projects. I had the chance to provide a deep dive into music for tiny airports, explaining how to generate hours and hours of music in a handful of bytes.
- MUSIC FOR TINY AIRPORTS 2/1 🛫 Celebrating the 40 years anniversary of Brian Eno's "Ambient 1: Music for Airports" with an homage written in 256 bytes with the Web Audio API.
- THEY COME AT DUSK 👺 A survival horror game for JS1k 2018, where you run away from dead miners as you hear your heart beat. Turn around using the arrow keys until all you hear is beeeeeeeep.
- CODING⯌ART AT RENDER CODING⯌ART at Render 2017 was part of my series of talks + live coding aiming to inspire new web developer artists.
- MINAMI DISTRICT DEMOJS 2013's winner 1k intro. With MINAMI DISTRICT I wanted to do something fresh. Something never seen in normal demos before: A city with a twister skyscraper.
- WOLF1K The idea of this entry for the JS1K contest was to do the impossible: a 1K remake of the famous WOLF5K that rocked the final edition of the5K. It does not feature guns, evil grins and violence for in WOLF1K there is no room for guns or any form of violence.
Don't be shy; get in touch by mail, twitter, github, linkedin or pouet if you have any questions, feedback, speaking, workshop or performance opportunity.