@polygonjs/polygonjs/dist/src/core/keyframes/KeyframeSerialize.js

node-based WebGL 3D engine https://polygonjs.com

"use strict";
import { isArray } from "../Type";
import { createKeyframeTangent, copyKeyframeTangent } from "./KeyframeTangent";
export function createKeyframeData() {
  return { pos: 0, value: 0, in: { slope: 0, accel: 0 } };
}
export function channelDataFromString(content, target) {
  try {
    let json = JSON.parse(content);
    if (isArray(json)) {
      let i = 0;
      for (const targetSubElement of target) {
        const jsonElement = json[i] || json[0];
        copyChannelData(jsonElement, targetSubElement);
        i++;
      }
    } else {
      for (const targetSubElement of target) {
        copyChannelData(json, targetSubElement);
      }
    }
  } catch (e) {
    console.warn("invalid channel data");
    console.log(e);
    console.log(target);
  }
}
export function channelDataToString(data) {
  if (data.length == 1) {
    return JSON.stringify(data[0]);
  }
  return JSON.stringify(data);
}
export function copyKeyframeData(src, target) {
  target.pos = src.pos;
  target.value = src.value;
  copyKeyframeTangent(src.in, target.in);
  if (src.out) {
    if (!target.out) {
      target.out = createKeyframeTangent();
    }
    copyKeyframeTangent(src.out, target.out);
  } else {
    delete target.out;
  }
}
export function copyChannelData(src, target) {
  target.interpolation = src.interpolation;
  target.keyframes.splice(src.keyframes.length, target.keyframes.length);
  const srcKeyframes = src.keyframes;
  let i = 0;
  for (const srcKeyframe of srcKeyframes) {
    let targetKeyframe = target.keyframes[i];
    if (!targetKeyframe) {
      targetKeyframe = createKeyframeData();
      target.keyframes[i] = targetKeyframe;
    }
    copyKeyframeData(srcKeyframe, targetKeyframe);
    i++;
  }
}