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

Visualization Toolkit for the Web

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

// ----------------------------------------------------------------------------
// vtkOpenGLActor methods
// ----------------------------------------------------------------------------

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

  // Builds myself.
  publicAPI.buildPass = prepass => {
    if (prepass) {
      model._openGLRenderWindow = publicAPI.getLastAncestorOfType('vtkOpenGLRenderWindow');
      model._openGLRenderer = publicAPI.getFirstAncestorOfType('vtkOpenGLRenderer');
      model.context = model._openGLRenderWindow.getContext();
      publicAPI.prepareNodes();
      publicAPI.addMissingNodes(model.renderable.getTextures());
      publicAPI.addMissingNode(model.renderable.getMapper());
      publicAPI.removeUnusedNodes();

      // we store textures and mapper
      model.ogltextures = null;
      model.activeTextures = null;
      for (let index = 0; index < model.children.length; index++) {
        const child = model.children[index];
        if (child.isA('vtkOpenGLTexture')) {
          if (!model.ogltextures) {
            model.ogltextures = [];
          }
          model.ogltextures.push(child);
        } else {
          model.oglmapper = child;
        }
      }
    }
  };

  // render both opaque and translucent actors
  publicAPI.traverseZBufferPass = renderPass => {
    if (!model.renderable || !model.renderable.getNestedVisibility() || model._openGLRenderer.getSelector() && !model.renderable.getNestedPickable()) {
      return;
    }
    publicAPI.apply(renderPass, true);
    model.oglmapper.traverse(renderPass);
    publicAPI.apply(renderPass, false);
  };

  // only render opaque actors
  publicAPI.traverseOpaqueZBufferPass = renderPass => publicAPI.traverseOpaquePass(renderPass);

  // we draw textures, then mapper, then post pass textures
  publicAPI.traverseOpaquePass = renderPass => {
    if (!model.renderable || !model.renderable.getNestedVisibility() || !model.renderable.getIsOpaque() || model._openGLRenderer.getSelector() && !model.renderable.getNestedPickable()) {
      return;
    }
    publicAPI.apply(renderPass, true);
    model.oglmapper.traverse(renderPass);
    publicAPI.apply(renderPass, false);
  };

  // we draw textures, then mapper, then post pass textures
  publicAPI.traverseTranslucentPass = renderPass => {
    if (!model.renderable || !model.renderable.getNestedVisibility() || model.renderable.getIsOpaque() || model._openGLRenderer.getSelector() && !model.renderable.getNestedPickable()) {
      return;
    }
    publicAPI.apply(renderPass, true);
    model.oglmapper.traverse(renderPass);
    publicAPI.apply(renderPass, false);
  };
  publicAPI.activateTextures = () => {
    // always traverse textures first, then mapper
    if (!model.ogltextures) {
      return;
    }
    model.activeTextures = [];
    for (let index = 0; index < model.ogltextures.length; index++) {
      const child = model.ogltextures[index];
      child.render();
      if (child.getHandle()) {
        model.activeTextures.push(child);
      }
    }
  };
  publicAPI.queryPass = (prepass, renderPass) => {
    if (prepass) {
      if (!model.renderable || !model.renderable.getVisibility()) {
        return;
      }
      if (model.renderable.getIsOpaque()) {
        renderPass.incrementOpaqueActorCount();
      } else {
        renderPass.incrementTranslucentActorCount();
      }
    }
  };
  publicAPI.zBufferPass = (prepass, renderPass) => publicAPI.opaquePass(prepass, renderPass);
  publicAPI.opaqueZBufferPass = (prepass, renderPass) => publicAPI.opaquePass(prepass, renderPass);
  publicAPI.opaquePass = (prepass, renderPass) => {
    if (prepass) {
      model.context.depthMask(true);
      publicAPI.activateTextures();
    } else if (model.activeTextures) {
      for (let index = 0; index < model.activeTextures.length; index++) {
        model.activeTextures[index].deactivate();
      }
    }
  };

  // Renders myself
  publicAPI.translucentPass = (prepass, renderPass) => {
    if (prepass) {
      model.context.depthMask(model._openGLRenderer.getSelector() && model.renderable.getNestedPickable());
      publicAPI.activateTextures();
    } else if (model.activeTextures) {
      for (let index = 0; index < model.activeTextures.length; index++) {
        model.activeTextures[index].deactivate();
      }
    }
  };
  publicAPI.getKeyMatrices = () => {
    // has the actor changed?
    if (model.renderable.getMTime() > model.keyMatrixTime.getMTime()) {
      model.renderable.computeMatrix();
      mat4.copy(model.keyMatrices.mcwc, model.renderable.getMatrix());
      mat4.transpose(model.keyMatrices.mcwc, model.keyMatrices.mcwc);
      if (model.renderable.getIsIdentity()) {
        mat3.identity(model.keyMatrices.normalMatrix);
      } else {
        mat3.fromMat4(model.keyMatrices.normalMatrix, model.keyMatrices.mcwc);
        mat3.invert(model.keyMatrices.normalMatrix, model.keyMatrices.normalMatrix);
        mat3.transpose(model.keyMatrices.normalMatrix, model.keyMatrices.normalMatrix);
      }
      model.keyMatrixTime.modified();
    }
    return model.keyMatrices;
  };
}

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

const DEFAULT_VALUES = {
  context: null,
  keyMatrixTime: null,
  keyMatrices: null,
  activeTextures: 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
  });
  model.keyMatrices = {
    normalMatrix: mat3.identity(new Float64Array(9)),
    mcwc: mat4.identity(new Float64Array(16))
  };

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

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

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

const newInstance = newInstance$1(extend);

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

var vtkActor = {
  newInstance,
  extend
};

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

export { vtkActor as default, extend, newInstance };