@kitware/vtk.js/Rendering/Core/Actor.js

Visualization Toolkit for the Web

import { mat4, vec3 } from 'gl-matrix';
import { m as macro } from '../../macros2.js';
import vtkBoundingBox from '../../Common/DataModel/BoundingBox.js';
import vtkProp3D from './Prop3D.js';
import vtkProperty from './Property.js';

const {
  vtkDebugMacro
} = macro;

// ----------------------------------------------------------------------------
// vtkActor methods
// ----------------------------------------------------------------------------

function vtkActor(publicAPI, model) {
  // Set our className
  model.classHierarchy.push('vtkActor');

  // Capture 'parentClass' api for internal use
  const superClass = {
    ...publicAPI
  };
  publicAPI.getActors = () => [publicAPI];
  publicAPI.getIsOpaque = () => {
    if (model.forceOpaque) {
      return true;
    }
    if (model.forceTranslucent) {
      return false;
    }
    // make sure we have a property
    if (!model.property) {
      // force creation of a property
      publicAPI.getProperty();
    }
    let isOpaque = model.property.getOpacity() >= 1.0;

    // are we using an opaque texture, if any?
    isOpaque = isOpaque && (!model.texture || !model.texture.isTranslucent());

    // are we using an opaque scalar array, if any?
    isOpaque = isOpaque && (!model.mapper || model.mapper.getIsOpaque());
    return isOpaque;
  };
  publicAPI.hasTranslucentPolygonalGeometry = () => {
    if (model.mapper === null) {
      return false;
    }
    // make sure we have a property
    if (model.property === null) {
      // force creation of a property
      publicAPI.setProperty(publicAPI.makeProperty());
    }

    // is this actor opaque ?
    return !publicAPI.getIsOpaque();
  };
  publicAPI.makeProperty = vtkProperty.newInstance;
  publicAPI.getProperty = () => {
    if (model.property === null) {
      model.property = publicAPI.makeProperty();
    }
    return model.property;
  };
  publicAPI.getBounds = () => {
    if (model.mapper === null) {
      return model.bounds;
    }

    // Check for the special case when the mapper's bounds are unknown
    const bds = model.mapper.getBounds();
    if (!bds || bds.length !== 6) {
      return bds;
    }

    // Check for the special case when the actor is empty.
    if (bds[0] > bds[1]) {
      model.mapperBounds = bds.concat(); // copy the mapper's bounds
      model.bounds = [1, -1, 1, -1, 1, -1];
      model.boundsMTime.modified();
      return bds;
    }

    // Check if we have cached values for these bounds - we cache the
    // values returned by model.mapper.getBounds() and we store the time
    // of caching. If the values returned this time are different, or
    // the modified time of this class is newer than the cached time,
    // then we need to rebuild.
    if (!model.mapperBounds || bds[0] !== model.mapperBounds[0] || bds[1] !== model.mapperBounds[1] || bds[2] !== model.mapperBounds[2] || bds[3] !== model.mapperBounds[3] || bds[4] !== model.mapperBounds[4] || bds[5] !== model.mapperBounds[5] || publicAPI.getMTime() > model.boundsMTime.getMTime()) {
      vtkDebugMacro('Recomputing bounds...');
      model.mapperBounds = bds.concat(); // copy the mapper's bounds
      const bbox = [];
      vtkBoundingBox.getCorners(bds, bbox);
      publicAPI.computeMatrix();
      const tmp4 = new Float64Array(16);
      mat4.transpose(tmp4, model.matrix);
      bbox.forEach(pt => vec3.transformMat4(pt, pt, tmp4));

      /* eslint-disable no-multi-assign */
      model.bounds[0] = model.bounds[2] = model.bounds[4] = Number.MAX_VALUE;
      model.bounds[1] = model.bounds[3] = model.bounds[5] = -Number.MAX_VALUE;
      /* eslint-enable no-multi-assign */

      model.bounds = model.bounds.map((d, i) => i % 2 === 0 ? bbox.reduce((a, b) => a > b[i / 2] ? b[i / 2] : a, d) : bbox.reduce((a, b) => a < b[(i - 1) / 2] ? b[(i - 1) / 2] : a, d));
      model.boundsMTime.modified();
    }
    return model.bounds;
  };
  publicAPI.getMTime = () => {
    let mt = superClass.getMTime();
    if (model.property !== null) {
      const time = model.property.getMTime();
      mt = time > mt ? time : mt;
    }
    if (model.backfaceProperty !== null) {
      const time = model.backfaceProperty.getMTime();
      mt = time > mt ? time : mt;
    }
    return mt;
  };
  publicAPI.getRedrawMTime = () => {
    let mt = model.mtime;
    if (model.mapper !== null) {
      let time = model.mapper.getMTime();
      mt = time > mt ? time : mt;
      if (model.mapper.getInput() !== null) {
        // FIXME !!! getInputAlgorithm / getInput
        model.mapper.getInputAlgorithm().update();
        time = model.mapper.getInput().getMTime();
        mt = time > mt ? time : mt;
      }
    }
    return mt;
  };
  publicAPI.getSupportsSelection = () => model.mapper ? model.mapper.getSupportsSelection() : false;
  publicAPI.processSelectorPixelBuffers = (selector, pixelOffsets) => {
    if (model.mapper && model.mapper.processSelectorPixelBuffers) {
      model.mapper.processSelectorPixelBuffers(selector, pixelOffsets);
    }
  };
}

// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------

const DEFAULT_VALUES = {
  mapper: null,
  property: null,
  backfaceProperty: null,
  forceOpaque: false,
  forceTranslucent: false,
  bounds: [1, -1, 1, -1, 1, -1]
};

// ----------------------------------------------------------------------------

function extend(publicAPI, model) {
  let initialValues = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
  Object.assign(model, DEFAULT_VALUES, initialValues);

  // Inheritance
  vtkProp3D.extend(publicAPI, model, initialValues);

  // vtkTimeStamp
  model.boundsMTime = {};
  macro.obj(model.boundsMTime);

  // Build VTK API
  macro.set(publicAPI, model, ['property']);
  macro.setGet(publicAPI, model, ['backfaceProperty', 'forceOpaque', 'forceTranslucent', 'mapper']);

  // Object methods
  vtkActor(publicAPI, model);
}

// ----------------------------------------------------------------------------

const newInstance = macro.newInstance(extend, 'vtkActor');

// ----------------------------------------------------------------------------

var vtkActor$1 = {
  newInstance,
  extend
};

export { vtkActor$1 as default, extend, newInstance };