polygonjs-engine/dist/src/core/operations/sop/RestAttributes.js

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

import {BaseSopOperation} from "./_Base";
export class RestAttributesSopOperation extends BaseSopOperation {
  static type() {
    return "restAttributes";
  }
  cook(input_contents, params) {
    const core_group = input_contents[0];
    const objects = core_group.objectsWithGeo();
    if (params.tposition) {
      this._create_rest_attribute(objects, params.position, params.restP);
    }
    if (params.tnormal) {
      this._create_rest_attribute(objects, params.normal, params.restN);
    }
    return this.create_core_group_from_objects(objects);
  }
  _create_rest_attribute(objects, attrib_name, rest_attrib_name) {
    for (let object of objects) {
      const geometry = object.geometry;
      if (geometry) {
        const src_attrib = geometry.getAttribute(attrib_name);
        if (src_attrib) {
          geometry.setAttribute(rest_attrib_name, src_attrib.clone());
        }
      }
    }
  }
}
RestAttributesSopOperation.DEFAULT_PARAMS = {
  tposition: true,
  position: "position",
  restP: "restP",
  tnormal: true,
  normal: "normal",
  restN: "restN"
};