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| 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 | 6x 6x 6x 6x 6x 6x 6x 6x 6x 6x 1x 6x 6x 6x 6x 6x 6x 6x 6x 1x | import { vec3, mat4 } from 'gl-matrix';
import macro from 'vtk.js/Sources/macros';
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';
// ----------------------------------------------------------------------------
// vtkMouseCameraTrackballRotateManipulator methods
// ----------------------------------------------------------------------------
function vtkMouseCameraTrackballRotateManipulator(publicAPI, model) {
// Set our className
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;
if (model.useFocalPointAsCenterOfRotation) {
center[0] = cameraFp[0];
center[1] = cameraFp[1];
center[2] = cameraFp[2];
}
const dx = model.previousPosition.x - position.x;
const dy = model.previousPosition.y - position.y;
const size = interactor.getView().getViewportSize(renderer);
// Azimuth
const viewUp = camera.getViewUp();
if (model.useWorldUpVec) {
const centerOfRotation = new Float64Array(3);
vec3.copy(centerOfRotation, model.worldUpVec);
// Compute projection of cameraPos onto worldUpVec
vtkMath.multiplyScalar(
centerOfRotation,
vtkMath.dot(cameraPos, model.worldUpVec) /
vtkMath.dot(model.worldUpVec, model.worldUpVec)
);
vtkMath.add(center, centerOfRotation, centerOfRotation);
mat4.translate(trans, trans, centerOfRotation);
mat4.rotate(
trans,
trans,
vtkMath.radiansFromDegrees(((360.0 * dx) / size[0]) * rotationFactor),
model.worldUpVec
);
// Translate back
centerOfRotation[0] = -centerOfRotation[0];
centerOfRotation[1] = -centerOfRotation[1];
centerOfRotation[2] = -centerOfRotation[2];
mat4.translate(trans, trans, centerOfRotation);
mat4.translate(trans, trans, center);
} else {
mat4.translate(trans, trans, center);
mat4.rotate(
trans,
trans,
vtkMath.radiansFromDegrees(((360.0 * dx) / size[0]) * rotationFactor),
viewUp
);
}
// Elevation
vtkMath.cross(camera.getDirectionOfProjection(), viewUp, v2);
mat4.rotate(
trans,
trans,
vtkMath.radiansFromDegrees(((-360.0 * dy) / size[1]) * rotationFactor),
v2
);
// Translate back
centerNeg[0] = -center[0];
centerNeg[1] = -center[1];
centerNeg[2] = -center[2];
mat4.translate(trans, trans, centerNeg);
// Apply transformation to camera position, focal point, and view up
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;
};
}
// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------
const DEFAULT_VALUES = {
useWorldUpVec: false,
// set WorldUpVector to be y-axis by default
worldUpVec: [0, 1, 0],
useFocalPointAsCenterOfRotation: false,
};
// ----------------------------------------------------------------------------
export function extend(publicAPI, model, initialValues = {}) {
Object.assign(model, DEFAULT_VALUES, initialValues);
// Inheritance
macro.obj(publicAPI, model);
vtkCompositeMouseManipulator.extend(publicAPI, model, initialValues);
vtkCompositeCameraManipulator.extend(publicAPI, model, initialValues);
// Create get-set macro
macro.setGet(publicAPI, model, ['useWorldUpVec']);
macro.setGetArray(publicAPI, model, ['worldUpVec'], 3);
macro.setGet(publicAPI, model, ['useFocalPointAsCenterOfRotation']);
// Object specific methods
vtkMouseCameraTrackballRotateManipulator(publicAPI, model);
}
// ----------------------------------------------------------------------------
export const newInstance = macro.newInstance(
extend,
'vtkMouseCameraTrackballRotateManipulator'
);
// ----------------------------------------------------------------------------
export default { newInstance, extend };
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