@kitware/vtk.js/Rendering/OpenGL/Camera.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';

// ----------------------------------------------------------------------------
// vtkOpenGLCamera methods
// ----------------------------------------------------------------------------

function vtkOpenGLCamera(publicAPI, model) {
  // Set our className
  model.classHierarchy.push('vtkOpenGLCamera');
  publicAPI.buildPass = prepass => {
    if (prepass) {
      model._openGLRenderer = publicAPI.getFirstAncestorOfType('vtkOpenGLRenderer');
      model._openGLRenderWindow = model._openGLRenderer.getParent();
      model.context = model._openGLRenderWindow.getContext();
    }
  };

  // Renders myself
  publicAPI.opaquePass = prepass => {
    if (prepass) {
      const tsize = model._openGLRenderer.getTiledSizeAndOrigin();
      model.context.viewport(tsize.lowerLeftU, tsize.lowerLeftV, tsize.usize, tsize.vsize);
      model.context.scissor(tsize.lowerLeftU, tsize.lowerLeftV, tsize.usize, tsize.vsize);
    }
  };
  publicAPI.translucentPass = publicAPI.opaquePass;
  publicAPI.zBufferPass = publicAPI.opaquePass;
  publicAPI.opaqueZBufferPass = publicAPI.opaquePass;
  publicAPI.volumePass = publicAPI.opaquePass;
  publicAPI.getKeyMatrices = ren => {
    // has the camera changed?
    if (ren !== model.lastRenderer || model._openGLRenderWindow.getMTime() > model.keyMatrixTime.getMTime() || publicAPI.getMTime() > model.keyMatrixTime.getMTime() || ren.getMTime() > model.keyMatrixTime.getMTime() || model.renderable.getMTime() > model.keyMatrixTime.getMTime()) {
      mat4.copy(model.keyMatrices.wcvc, model.renderable.getViewMatrix());
      mat3.fromMat4(model.keyMatrices.normalMatrix, model.keyMatrices.wcvc);
      mat3.invert(model.keyMatrices.normalMatrix, model.keyMatrices.normalMatrix);
      mat4.transpose(model.keyMatrices.wcvc, model.keyMatrices.wcvc);
      const aspectRatio = model._openGLRenderer.getAspectRatio();
      mat4.copy(model.keyMatrices.vcpc, model.renderable.getProjectionMatrix(aspectRatio, -1, 1));
      mat4.transpose(model.keyMatrices.vcpc, model.keyMatrices.vcpc);
      mat4.multiply(model.keyMatrices.wcpc, model.keyMatrices.vcpc, model.keyMatrices.wcvc);
      model.keyMatrixTime.modified();
      model.lastRenderer = ren;
    }
    return model.keyMatrices;
  };
}

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

const DEFAULT_VALUES = {
  context: null,
  lastRenderer: null,
  keyMatrixTime: null,
  keyMatrices: null
};

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

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

  // Inheritance
  vtkViewNode.extend(publicAPI, model, initialValues);
  model.keyMatrixTime = {};
  obj(model.keyMatrixTime);

  // values always get set by the get method
  model.keyMatrices = {
    normalMatrix: new Float64Array(9),
    vcpc: new Float64Array(16),
    wcvc: new Float64Array(16),
    wcpc: new Float64Array(16)
  };

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

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

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

const newInstance = newInstance$1(extend);

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

var vtkCamera = {
  newInstance,
  extend
};

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

export { vtkCamera as default, extend, newInstance };