Published unlisted
Edited
Aug 29, 2022
function simpleAvg(p1, p2) {
return (p1 + p2) / 2 }
function oppositeAvg(p1, p2) {
return (simpleAvg(p1, p2) + 180) % 360 }
nCircStyle = html`<style>
.n-circ-explainer #unit-circle-points {
opacity: ${phase > 1 ? 1 : 0} !important;
}
.n-circ-explainer #unit-circle-points-anim {
opacity: ${phase > 1 ? 1 : 0} !important;
}
.n-circ-explainer #unit-circle-points-anim > circle {
${phase >= 3 ? `
cx: ${realifyCoords(avgPoint)[0]}px;
cy: ${realifyCoords(avgPoint)[1] + 12}px;
fill: white;
stroke-width: 4px;
` : ""}
stroke: black;
transition-duration: 0.5s;
transition-property: cx, cy, fill, stroke-width;
}
.n-circ-explainer #unit-circle-avg-line {
opacity: ${phase > 3 ? 1 : 0} !important;
}
.n-circ-explainer .unit-circle-phase {
transition: 0.333s opacity;
}
/* only for blog post */
#explainer-area li#explainer-phase-2 { color: ${phase >= 2 ? "black" : "inherit"} }
#explainer-area li#explainer-phase-3 { color: ${phase >= 3 ? "black" : "inherit"} }
#explainer-area li#explainer-phase-4 { color: ${phase >= 4 ? "black" : "inherit"} }
</style>`
nCircExplainer = {
const id = Math.random().toString(36).split(".")[1];
return html`
<svg width="310" height="300" viewBox="-10 -10 320 320" class="n-circ-explainer${injectAnimation.length ? "-autoanimated" : ""}">
${genUnitCircle(id)}
<g id="unit-circle-avg-line" class="unit-circle-phase" style="opacity: 0">${unitCircleAngle(avgPoint)}</g>
<g id="unit-circle-points" class="unit-circle-phase" style="opacity: 0">${POINTS.map(p => unitCirclePoint(p))}</g>
<g id="unit-circle-points-anim" class="unit-circle-phase" style="opacity: 0">${POINTS.map(p => unitCirclePoint(p))}</g>
<style>
${injectAnimation.length ? svg`
<style>
@keyframes phase2 {
from, ${(((0.25 * ANIM_LENGTH) - 0.333) / ANIM_LENGTH_WITH_GAP) * 100}% {
opacity: 0;
}
${((0.25 * ANIM_LENGTH) / ANIM_LENGTH_WITH_GAP) * 100}%, to {
opacity: 1;
}
}
@keyframes phase4 {
from, ${(((0.75 * ANIM_LENGTH) - 0.333) / ANIM_LENGTH_WITH_GAP) * 100}% {
opacity: 0;
}
${((0.75 * ANIM_LENGTH) / ANIM_LENGTH_WITH_GAP) * 100}%, to {
opacity: 1;
}
}
#unit-circle-points, #unit-circle-points-anim {
animation-name: phase2;
}
#unit-circle-avg-line {
animation-name: phase4;
}
.unit-circle-phase {
animation-duration: ${ANIM_LENGTH_WITH_GAP}s;
animation-iteration-count: infinite;
}
</style>
` : ""}
</svg>
`;
}
viewof injectAnimation = Inputs.checkbox(["Inject animation CSS"])
ANIM_LENGTH_WITH_GAP = 11
function realifyCoords(coords) {
const width = (300 / 2);
return coords.map(v => v * width + width);
}
function unitCirclePoint(coords, calcCoords = true, color = "black") {
if (calcCoords) {
const rad = deg2rad(coords - 90);
coords = [Math.cos(rad), Math.sin(rad)]
}
coords = realifyCoords(coords);
return svg`
<circle cx=${coords[0]} cy=${coords[1]} r="12" fill="${color}" />
`;
}
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