import { vec3, mat4 } from 'gl-matrix'; import macro from 'vtk.js/Sources/macro'; import vtkCompositeCameraManipulator from 'vtk.js/Sources/Interaction/Manipulators/CompositeCameraManipulator'; import vtkCompositeMouseManipulator from 'vtk.js/Sources/Interaction/Manipulators/CompositeMouseManipulator'; import * as vtkMath from 'vtk.js/Sources/Common/Core/Math';
function vtkMouseCameraTrackballRotateManipulator(publicAPI, model) { model.classHierarchy.push('vtkMouseCameraTrackballRotateManipulator');
const newCamPos = new Float64Array(3); const newFp = new Float64Array(3); const newViewUp = new Float64Array(3); const trans = new Float64Array(16); const v2 = new Float64Array(3); const centerNeg = new Float64Array(3); const direction = new Float64Array(3);
publicAPI.onButtonDown = (interactor, renderer, position) => { model.previousPosition = position; };
publicAPI.onMouseMove = (interactor, renderer, position) => { if (!position) { return; }
const camera = renderer.getActiveCamera(); const cameraPos = camera.getPosition(); const cameraFp = camera.getFocalPoint();
mat4.identity(trans);
const { center, rotationFactor } = model;
mat4.translate(trans, trans, center);
const dx = model.previousPosition.x - position.x; const dy = model.previousPosition.y - position.y;
const size = interactor.getView().getSize();
const viewUp = camera.getViewUp(); mat4.rotate( trans, trans, vtkMath.radiansFromDegrees(((360.0 * dx) / size[0]) * rotationFactor), viewUp );
vtkMath.cross(camera.getDirectionOfProjection(), viewUp, v2); mat4.rotate( trans, trans, vtkMath.radiansFromDegrees(((-360.0 * dy) / size[1]) * rotationFactor), v2 );
centerNeg[0] = -center[0]; centerNeg[1] = -center[1]; centerNeg[2] = -center[2]; mat4.translate(trans, trans, centerNeg);
vec3.transformMat4(newCamPos, cameraPos, trans); vec3.transformMat4(newFp, cameraFp, trans); direction[0] = viewUp[0] + cameraPos[0]; direction[1] = viewUp[1] + cameraPos[1]; direction[2] = viewUp[2] + cameraPos[2]; vec3.transformMat4(newViewUp, direction, trans);
camera.setPosition(newCamPos[0], newCamPos[1], newCamPos[2]); camera.setFocalPoint(newFp[0], newFp[1], newFp[2]); camera.setViewUp( newViewUp[0] - newCamPos[0], newViewUp[1] - newCamPos[1], newViewUp[2] - newCamPos[2] ); camera.orthogonalizeViewUp();
renderer.resetCameraClippingRange();
if (interactor.getLightFollowCamera()) { renderer.updateLightsGeometryToFollowCamera(); }
model.previousPosition = position; }; }
const DEFAULT_VALUES = {};
export function extend(publicAPI, model, initialValues = {}) { Object.assign(model, DEFAULT_VALUES, initialValues);
macro.obj(publicAPI, model); vtkCompositeMouseManipulator.extend(publicAPI, model, initialValues); vtkCompositeCameraManipulator.extend(publicAPI, model, initialValues);
vtkMouseCameraTrackballRotateManipulator(publicAPI, model); }
export const newInstance = macro.newInstance( extend, 'vtkMouseCameraTrackballRotateManipulator' );
export default { newInstance, extend };
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