Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 | 1x 1x 1x 1x 1x 1x 1x 1x 1x | import { mat4, vec3 } from 'gl-matrix';
import macro from 'vtk.js/Sources/macros';
import * as vtkMath from 'vtk.js/Sources/Common/Core/Math';
import vtkAbstractManipulator from 'vtk.js/Sources/Widgets/Manipulators/AbstractManipulator';
export function trackballRotate(
prevX,
prevY,
curX,
curY,
origin,
direction,
renderer,
glRenderWindow
) {
const dx = curX - prevX;
const dy = curY - prevY;
const camera = renderer.getActiveCamera();
const viewUp = camera.getViewUp();
const dop = camera.getDirectionOfProjection();
const size = renderer
.getRenderWindow()
.getInteractor()
.getView()
.getViewportSize(renderer);
const xdeg = (360.0 * dx) / size[0];
const ydeg = (360.0 * dy) / size[1];
const newDirection = new Float64Array([
direction[0],
direction[1],
direction[2],
]);
const xDisplayAxis = viewUp;
const yDisplayAxis = [0, 0, 0];
vtkMath.cross(dop, viewUp, yDisplayAxis);
const rot = mat4.identity(new Float64Array(16));
mat4.rotate(rot, rot, vtkMath.radiansFromDegrees(xdeg), xDisplayAxis);
mat4.rotate(rot, rot, vtkMath.radiansFromDegrees(-ydeg), yDisplayAxis);
vec3.transformMat4(newDirection, newDirection, rot);
return newDirection;
}
// ----------------------------------------------------------------------------
// vtkTrackballManipulator methods
// ----------------------------------------------------------------------------
function vtkTrackballManipulator(publicAPI, model) {
// Set our className
model.classHierarchy.push('vtkTrackballManipulator');
let prevX = 0;
let prevY = 0;
publicAPI.handleEvent = (callData, glRenderWindow) => {
const newDirection = trackballRotate(
prevX,
prevY,
callData.position.x,
callData.position.y,
publicAPI.getOrigin(callData),
publicAPI.getNormal(callData),
callData.pokedRenderer,
glRenderWindow
);
prevX = callData.position.x;
prevY = callData.position.y;
return { worldCoords: newDirection };
};
publicAPI.reset = (callData) => {
prevX = callData.position.x;
prevY = callData.position.y;
};
}
// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------
function defaultValues(initialValues) {
return {
...initialValues,
};
}
// ----------------------------------------------------------------------------
export function extend(publicAPI, model, initialValues = {}) {
vtkAbstractManipulator.extend(publicAPI, model, defaultValues(initialValues));
vtkTrackballManipulator(publicAPI, model);
}
// ----------------------------------------------------------------------------
export const newInstance = macro.newInstance(extend, 'vtkTrackballManipulator');
// ----------------------------------------------------------------------------
export default { trackballRotate, extend, newInstance };
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