@kitware/vtk.js/Rendering/OpenGL/Volume.js

Visualization Toolkit for the Web

import { mat4, mat3 } from 'gl-matrix';
import { n as newInstance$1, o as obj, e as setGet } from '../../macros2.js';
import vtkViewNode from '../SceneGraph/ViewNode.js';
import { registerOverride } from './ViewNodeFactory.js';

// ----------------------------------------------------------------------------
// vtkOpenGLVolume methods
// ----------------------------------------------------------------------------

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

  // Builds myself.
  publicAPI.buildPass = prepass => {
    if (!model.renderable || !model.renderable.getVisibility()) {
      return;
    }
    if (prepass) {
      model._openGLRenderWindow = publicAPI.getLastAncestorOfType('vtkOpenGLRenderWindow');
      model._openGLRenderer = publicAPI.getFirstAncestorOfType('vtkOpenGLRenderer');
      model.context = model._openGLRenderWindow.getContext();
      publicAPI.prepareNodes();
      publicAPI.addMissingNode(model.renderable.getMapper());
      publicAPI.removeUnusedNodes();
    }
  };
  publicAPI.queryPass = (prepass, renderPass) => {
    if (prepass) {
      if (!model.renderable || !model.renderable.getVisibility()) {
        return;
      }
      renderPass.incrementVolumeCount();
    }
  };
  publicAPI.traverseVolumePass = renderPass => {
    if (!model.renderable || !model.renderable.getNestedVisibility() || model._openGLRenderer.getSelector() && !model.renderable.getNestedPickable()) {
      return;
    }
    publicAPI.apply(renderPass, true);
    model.children[0].traverse(renderPass);
    publicAPI.apply(renderPass, false);
  };

  // Renders myself
  publicAPI.volumePass = prepass => {
    if (!model.renderable || !model.renderable.getVisibility()) {
      return;
    }
    model.context.depthMask(!prepass);
  };
  publicAPI.getKeyMatrices = () => {
    // has the actor changed?
    if (model.renderable.getMTime() > model.keyMatrixTime.getMTime()) {
      model.renderable.computeMatrix();
      mat4.copy(model.MCWCMatrix, model.renderable.getMatrix());
      mat4.transpose(model.MCWCMatrix, model.MCWCMatrix);
      if (model.renderable.getIsIdentity()) {
        mat3.identity(model.normalMatrix);
      } else {
        mat3.fromMat4(model.normalMatrix, model.MCWCMatrix);
        mat3.invert(model.normalMatrix, model.normalMatrix);
        mat3.transpose(model.normalMatrix, model.normalMatrix);
      }
      model.keyMatrixTime.modified();
    }
    return {
      mcwc: model.MCWCMatrix,
      normalMatrix: model.normalMatrix
    };
  };
}

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

const DEFAULT_VALUES = {
  // context: null,
  // keyMatrixTime: null,
  // normalMatrix: null,
  // MCWCMatrix: null,
  // _openGLRenderWindow: null,
};

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

function extend(publicAPI, model, initialValues = {}) {
  Object.assign(model, DEFAULT_VALUES, initialValues);

  // Inheritance
  vtkViewNode.extend(publicAPI, model, initialValues);
  model.keyMatrixTime = {};
  obj(model.keyMatrixTime, {
    mtime: 0
  });
  // always set by getter
  model.normalMatrix = new Float64Array(9);
  model.MCWCMatrix = new Float64Array(16);

  // Build VTK API
  setGet(publicAPI, model, ['context']);

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

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

const newInstance = newInstance$1(extend, 'vtkOpenGLVolume');

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

var vtkVolume = {
  newInstance,
  extend
};

// Register ourself to OpenGL backend if imported
registerOverride('vtkVolume', newInstance);

export { vtkVolume as default, extend, newInstance };