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

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

import {BaseSopOperation} from "./_Base";
import {InputCloneMode as InputCloneMode2} from "../../../engine/poly/InputCloneMode";
export class AttribAddMultSopOperation extends BaseSopOperation {
  static type() {
    return "attribAddMult";
  }
  cook(input_contents, params) {
    const core_group = input_contents[0];
    const attrib_names = core_group.attribNamesMatchingMask(params.name);
    for (let attrib_name of attrib_names) {
      const geometries = core_group.geometries();
      for (let geometry of geometries) {
        this._update_attrib(attrib_name, geometry, params);
      }
    }
    return core_group;
  }
  _update_attrib(attrib_name, geometry, params) {
    const attribute = geometry.getAttribute(attrib_name);
    if (attribute) {
      const values = attribute.array;
      const preAdd = params.preAdd;
      const mult = params.mult;
      const postAdd = params.postAdd;
      for (let i = 0; i < values.length; i++) {
        const value = values[i];
        values[i] = (value + preAdd) * mult + postAdd;
      }
      attribute.needsUpdate = true;
    }
  }
}
AttribAddMultSopOperation.DEFAULT_PARAMS = {
  name: "",
  preAdd: 0,
  mult: 1,
  postAdd: 0
};
AttribAddMultSopOperation.INPUT_CLONED_STATE = InputCloneMode2.FROM_NODE;