Working aobrtable perspective search
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import { deferedSpawn } from "async-spawner";
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import Emittery from "emittery";
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import { promisify } from "util";
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//needed to pass information on wether or not the promise has been aborted witout 'this'
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class AbortableEmittery extends Emittery {
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public aborted = false;
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abort() {
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this.aborted = true;
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this.emit("abort");
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}
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}
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class AbortablePromise<T> extends Promise<T | null> {
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private emitter: AbortableEmittery;
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constructor(
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make_generator: (
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await_or_abort: (
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promise: Promise<any>,
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on_abort: () => void
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) => Promise<void>
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) => AsyncGenerator
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) {
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const emitter = new AbortableEmittery();
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const await_or_abort = (
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promise: Promise<any>,
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on_abort: () => void
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) => {
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return new Promise((resolve, reject) => {
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let resolved = false;
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emitter.on("abort", () => {
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if (!resolved) {
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on_abort();
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resolve(null);
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resolved = true;
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}
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});
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promise
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.then((result) => {
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if (!resolved) {
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resolve(result);
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resolved = true;
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}
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})
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.catch(reject);
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});
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};
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super(async (resolve, reject) => {
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let step_value;
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const generator = make_generator(await_or_abort);
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do {
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if (emitter.aborted) {
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resolve(null);
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return;
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}
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step_value = await generator.next();
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} while (!step_value.done);
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});
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this.emitter = emitter;
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}
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abort() {
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this.emitter.abort();
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}
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}
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// const sleep = promisify((timeout: number, callback: (...args: any[]) => void) =>
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// setTimeout(callback, timeout)
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// );
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// const a = new AbortablePromise(async function* () {
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// yield await sleep(1000);
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// console.log("awaited 100");
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// yield await sleep(2000);
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// console.log("awaited 200");
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// yield await sleep(3000);
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// console.log("awaited 300");
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// });
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// setTimeout(() => a.abort(), 1500);
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const b = new AbortablePromise(async function* (await_or_abort) {
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const ping = await deferedSpawn("ping", ["8.8.8.8"]);
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while (true) {
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console.log(
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await await_or_abort(ping.waitForNextData(), () => {
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ping.kill();
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})
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);
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yield;
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}
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});
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setTimeout(() => b.abort(), 5000);
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@ -0,0 +1,139 @@
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export function newpos(
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x: number,
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y: number,
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t: transformCoefs
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): { x: number; y: number } {
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return {
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x: (x * t[0] + y * t[1] + t[2]) / (t[6] * x + t[7] * y + 1),
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y: (x * t[3] + y * t[4] + t[5]) / (t[6] * x + t[7] * y + 1),
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};
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}
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export type transformCoefs = [
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number,
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number,
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number,
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number,
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number,
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number,
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number,
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number
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];
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export type transformDesc = {
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forward: transformCoefs;
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backward: transformCoefs;
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};
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// See perspective.md to learn how coefficients are created for calls below:
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export const transforms: transformDesc[] = [
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{
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forward: [
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0.418385,
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-0.064912,
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1.11204e-12,
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-1.07285e-16,
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0.407118,
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1.85136e-13,
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-0.000143964,
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-0.0000155811,
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],
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backward: [
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2.39014,
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0.381091,
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-5.07071e-13,
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8.09745e-16,
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2.45629,
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-1.95474e-12,
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0.000344095,
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0.0000931351,
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],
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},
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{
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forward: [
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1.52043,
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3.31591e-16,
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-9.50693e-13,
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4.91024e-16,
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1.29283,
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-4.86523e-28,
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0.00012882,
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0.000072315,
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],
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backward: [
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0.657707,
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2.87435e-16,
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-6.72954e-13,
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7.80686e-16,
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0.773495,
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-1.67079e-12,
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-0.0000847259,
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-0.0000559353,
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],
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},
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{
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forward: [
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0.894876,
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-0.285098,
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8.16135e-13,
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-4.48986e-17,
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1.06368,
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1.8139e-13,
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-0.0000260208,
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-0.0000110713,
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],
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backward: [
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1.11747,
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0.299515,
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-4.53809e-13,
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4.55732e-16,
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0.940129,
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-4.27521e-13,
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0.0000290775,
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0.0000182021,
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],
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},
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{
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forward: [
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1.96875,
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8.8124e-16,
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-1.34293e-12,
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0.725124,
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1,
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-8.35683e-13,
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0.00023979,
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7.05268e-19,
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],
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backward: [
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0.507937,
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-2.73557e-16,
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4.90838e-13,
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-0.368317,
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1,
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-1.03804e-12,
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-0.000121798,
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-1.49027e-19,
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],
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},
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{
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forward: [
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3.88517,
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0.106038,
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-3.10281e-12,
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1.43097,
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0.722206,
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-5.02081e-13,
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0.00071415,
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-0.0000918632,
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],
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backward: [
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0.272104,
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-0.0399518,
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-6.63745e-13,
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-0.539145,
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1.46381,
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-8.91691e-12,
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-0.000243851,
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0.000163002,
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],
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},
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];
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