speice.io/blog/2024-11-15-playing-with-fire/variation.ts

41 lines
960 B
TypeScript

import { Variation } from "./types";
export const linear: Variation = (x, y) => [x, y];
function r(x: number, y: number) {
return Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2));
}
function theta(x: number, y: number) {
return Math.atan2(x, y);
}
function omega(): number {
return Math.random() > 0.5 ? Math.PI : 0;
}
export const julia: Variation = (x, y) => {
const sqrtR = Math.sqrt(r(x, y));
const thetaVal = theta(x, y) / 2 + omega();
return [sqrtR * Math.cos(thetaVal), sqrtR * Math.sin(thetaVal)];
};
export const popcorn: Variation = (x, y, transformCoefs) => {
return [
x + transformCoefs.c * Math.sin(Math.tan(3 * y)),
y + transformCoefs.f * Math.sin(Math.tan(3 * x)),
];
};
export const pdj: (
pdjA: number,
pdjB: number,
pdjC: number,
pdjD: number
) => Variation = (pdjA, pdjB, pdjC, pdjD) => {
return (x, y) => [
Math.sin(pdjA * y) - Math.cos(pdjB * x),
Math.sin(pdjC * x) - Math.cos(pdjD * y),
];
};