ddneat

function isInside(p, [a, b]) {
    return (b[0] - a[0]) * (p[1] - a[1]) > (b[1] - a[1]) * (p[0] - a[0]);
}

function getEdges(polygon) {
    let edges = [];

    for (let i = 0; i < polygon.length; i++) {
        let edge = [polygon[(i + polygon.length - 1) % polygon.length], polygon[i]];

ddneat

Latency Comparison Numbers
--------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

ddneat

# Flatten a transparent image with a white background:
convert -flatten img1.png img1-white.png

# Make an image transparent
convert -transparent '#FFFFFF' nontransparent.gif transparent.png

# convert an image into tiles
convert -size 3200x3200 tile:single_tile.png final.png

# making a montage from a collection of images