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 | 2x 2x 2x 2x 2x 1x | 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';
import { EPSILON } from 'vtk.js/Sources/Common/Core/Math/Constants';
export function projectDisplayToLine(
x,
y,
lineOrigin,
lineDirection,
renderer,
glRenderWindow
) {
// if the active camera viewPlaneNormal and line direction are parallel, no change is allowed
const dotProduct = Math.abs(
vtkMath.dot(renderer.getActiveCamera().getViewPlaneNormal(), lineDirection)
);
if (1 - dotProduct < EPSILON) {
return [];
}
const near = glRenderWindow.displayToWorld(x, y, 0, renderer);
const far = glRenderWindow.displayToWorld(x, y, 1, renderer);
const viewDir = [0, 0, 0];
vtkMath.subtract(far, near, viewDir);
const normal = [0, 0, 0];
vtkMath.cross(lineDirection, viewDir, normal);
vtkMath.cross(normal, viewDir, normal);
const numerator = vtkMath.dot(
[near[0] - lineOrigin[0], near[1] - lineOrigin[1], near[2] - lineOrigin[2]],
normal
);
const denominator = vtkMath.dot(normal, lineDirection);
const result = lineDirection.slice();
if (denominator === 0) {
// no change is allowed
vtkMath.multiplyScalar(result, 0);
} else {
vtkMath.multiplyScalar(result, numerator / denominator);
}
vtkMath.add(lineOrigin, result, result);
return result;
}
// ----------------------------------------------------------------------------
// vtkLineManipulator methods
// ----------------------------------------------------------------------------
function vtkLineManipulator(publicAPI, model) {
// Set our className
model.classHierarchy.push('vtkLineManipulator');
publicAPI.handleEvent = (callData, glRenderWindow) =>
model._addWorldDeltas({
worldCoords: projectDisplayToLine(
callData.position.x,
callData.position.y,
publicAPI.getOrigin(callData),
publicAPI.getNormal(callData),
callData.pokedRenderer,
glRenderWindow
),
});
}
// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------
function defaultValues(initialValues) {
return {
...initialValues,
};
}
// ----------------------------------------------------------------------------
export function extend(publicAPI, model, initialValues = {}) {
vtkAbstractManipulator.extend(publicAPI, model, defaultValues(initialValues));
vtkLineManipulator(publicAPI, model);
}
// ----------------------------------------------------------------------------
export const newInstance = macro.newInstance(extend, 'vtkLineManipulator');
// ----------------------------------------------------------------------------
export default { projectDisplayToLine, extend, newInstance };
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