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Articles

7 posts
maps projections

The UN Just Endorsed Equal Earth — Here's What Mercator Was Actually Doing to Africa

On 4 September 2026 the UN General Assembly encouraged the world to move from Mercator to the Equal Earth projection. We measured both, on real country geometry, with the same libraries our map renderer uses. Africa is 13.9× Greenland. Mercator draws it at 0.9×.

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ai on-device

A Design Assistant That Runs On Your Device — No Account, No Server

PinePaper's on-device AI assistant turns a prompt into a real scene using a language model that runs entirely in your browser. Here's the architecture — constrained tool calls, two providers, and an honest account of what a tiny model can and can't do.

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mathematics ode

How a Pendulum Teaches You Differential Equations

You don't need a math degree to understand ODE solvers. You need a pendulum, a screen, and 20 minutes. Here's how Euler, RK4, and adaptive methods actually work — with the real code.

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mathematics fft

What the FFT Actually Shows You

Every sound you hear is a sum of sine waves. The Fast Fourier Transform decomposes that sum. Here's what that means, how it works, and why a 60-year-old algorithm is still everywhere.

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gif animation

How Animated GIFs Actually Work — From Canvas Frames to LZW Compression

The GIF format is 39 years old and still everywhere. Here's what happens between clicking 'Export' and getting a file — frame capture, color quantization, LZW compression, and why your GIF is 4MB.

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video mp4

How We Built Browser-Native MP4 Export — No Server Required

PinePaper exports MP4 video entirely in the browser using WebCodecs. Here's how the H.264 pipeline works — from canvas frames to a playable video file, without uploading anything.

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