Calculating signed distance fields #Math #Modeling
From the Almost Looks Like Work blog, signed distance fields (SDFs) is a fancy name for something very simple. An SDF is just a function which takes a position as an input, and outputs the distance from that position to the nearest part of a shape.
The question is, how are the individual SDFs combined to make a new, global SDF representing the joined object (the boolean union)?
Thinking about it for a second, we should first calculate the SDF for each circle individually – and . We should then return whichever circle edge is the closest, i.e.
This is cool, and there is a great list of SDFs for different primitive shapes listed here, but how do we actually draw the result of an SDF?
Adafruit publishes a wide range of writing and video content, including interviews and reporting on the maker market and the wider technology world. Our standards page is intended as a guide to best practices that Adafruit uses, as well as an outline of the ethical standards Adafruit aspires to. While Adafruit is not an independent journalistic institution, Adafruit strives to be a fair, informative, and positive voice within the community – check it out here: adafruit.com/editorialstandards
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.
and
. We should then return whichever circle edge is the closest, i.e.
