Max Richter
2e726a65f8
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101 lines
2.6 KiB
Svelte
101 lines
2.6 KiB
Svelte
<script lang="ts">
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import {
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decodeFloat,
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encodeFloat,
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decodeNestedArray,
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encodeNestedArray,
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concatEncodedArrays,
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} from "@nodes/utils";
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console.clear();
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{
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const encodedPositions = new Int32Array([
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encodeFloat(1.1),
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encodeFloat(2.0),
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encodeFloat(3.0),
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encodeFloat(4.0),
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encodeFloat(5.0),
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encodeFloat(6.0),
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encodeFloat(7.0),
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encodeFloat(8.0),
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encodeFloat(9.0),
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]);
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// Create a Float32Array using the same buffer that backs the Int32Array
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const floatView = new Float32Array(encodedPositions.buffer);
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console.log({ encodedPositions, floatView });
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}
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if (false) {
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const input_a = encodeNestedArray([1, 2, 3]);
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const input_b = 2;
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const input_c = 89;
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const input_d = encodeNestedArray([4, 5, 6]);
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const output = concatNestedArrays([input_a, input_b, input_c, input_d]);
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const decoded = decodeNestedArray(output);
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console.log("CONCAT", [input_a, input_b, input_c, input_d]);
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console.log(output);
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console.log(decoded);
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}
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if (false) {
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let maxError = 0;
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new Array(10_000).fill(null).forEach((v, i) => {
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const input = i < 5_000 ? i : Math.random() * 100;
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const encoded = encodeFloat(input);
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const output = decodeFloat(encoded[0], encoded[1]);
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const error = Math.abs(input - output);
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if (error > maxError) {
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maxError = error;
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}
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});
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console.log("DECODE FLOAT");
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console.log(maxError);
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console.log(encodeFloat(2.0));
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console.log("----");
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}
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if (false) {
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console.log("Turning Int32Array into Array");
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const test_size = 2_000_000;
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const a = new Int32Array(test_size);
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let t0 = performance.now();
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for (let i = 0; i < test_size; i++) {
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a[i] = Math.floor(Math.random() * 100);
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}
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console.log("TIME", performance.now() - t0);
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t0 = performance.now();
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const b = [...a.slice(0, test_size)];
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console.log("TIME", performance.now() - t0);
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console.log(typeof b, Array.isArray(b), b instanceof Int32Array);
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}
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if (false) {
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// const input = [5, [6, 1], [7, 2, [5, 1]]];
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// const input = [5, [], [6, []], []];
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// const input = [52];
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const input = [0, 0, [0, 2, 0, 128, 0, 128], 0, 128];
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console.log("INPUT");
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console.log(input);
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let encoded = encodeNestedArray(input);
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// encoded = [];
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console.log("ENCODED");
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console.log(encoded);
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encoded = [0, 2, 1, 0, 4, 4, 2, 4, 1, 2, 2, 0, 3, 2, 3, 1, 1, 1, 1];
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const decoded = decodeNestedArray(encoded);
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console.log("DECODED");
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console.log(decoded);
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console.log("EQUALS", JSON.stringify(input) === JSON.stringify(decoded));
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}
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</script>
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