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import vtkCamera from '@kitware/vtk.js/Rendering/Core/Camera';
import vtkMath from '@kitware/vtk.js/Common/Core/Math';
import { vec3, mat4 } from 'gl-matrix';
import type { vtkObject } from '@kitware/vtk.js/interfaces';
// Copied from VTKCamera
/**
*
*/
interface ICameraInitialValues {
position?: number[];
focalPoint?: number[];
viewUp?: number[];
directionOfProjection?: number[];
parallelProjection?: boolean;
useHorizontalViewAngle?: boolean;
viewAngle?: number;
parallelScale?: number;
clippingRange?: number[];
windowCenter?: number[];
viewPlaneNormal?: number[];
useOffAxisProjection?: boolean;
screenBottomLeft?: number[];
screenBottomRight?: number[];
screenTopRight?: number[];
freezeFocalPoint?: boolean;
physicalTranslation?: number[];
physicalScale?: number;
physicalViewUp?: number[];
physicalViewNorth?: number[];
}
export interface vtkSlabCamera extends vtkObject {
/**
* Apply a transform to the camera.
* The camera position, focal-point, and view-up are re-calculated
* using the transform's matrix to multiply the old points by the new transform.
* @param transformMat4 -
*/
applyTransform(transformMat4: mat4): void;
/**
* Rotate the camera about the view up vector centered at the focal point.
* @param angle -
*/
azimuth(angle: number): void;
/**
*
* @param bounds -
*/
computeClippingRange(bounds: number[]): number[];
/**
* This method must be called when the focal point or camera position changes
*/
computeDistance(): void;
/**
* the provided matrix should include
* translation and orientation only
* mat is physical to view
* @param mat -
*/
computeViewParametersFromPhysicalMatrix(mat: mat4): void;
/**
*
* @param vmat -
*/
computeViewParametersFromViewMatrix(vmat: mat4): void;
/**
* Not implemented yet
* @param sourceCamera -
*/
deepCopy(sourceCamera: vtkSlabCamera): void;
/**
* Move the position of the camera along the view plane normal. Moving
* towards the focal point (e.g., greater than 1) is a dolly-in, moving away
* from the focal point (e.g., less than 1) is a dolly-out.
* @param amount -
*/
dolly(amount: number): void;
/**
* Rotate the camera about the cross product of the negative of the direction of projection and the view up vector, using the focal point as the center of rotation.
* @param angle -
*/
elevation(angle: number): void;
/**
* Not implemented yet
*/
getCameraLightTransformMatrix(): void;
/**
*
* @defaultValue [0.01, 1000.01],
*/
getClippingRange(): number[];
/**
*
* @defaultValue [0.01, 1000.01],
*/
getClippingRangeByReference(): number[];
/**
*
* @param aspect - Camera frustum aspect ratio.
* @param nearz - Camera frustum near plane.
* @param farz - Camera frustum far plane.
*/
getCompositeProjectionMatrix(
aspect: number,
nearz: number,
farz: number
): mat4;
/**
* Get the vector in the direction from the camera position to the focal point.
* @defaultValue [0, 0, -1],
*/
getDirectionOfProjection(): number[];
/**
*
* @defaultValue [0, 0, -1],
*/
getDirectionOfProjectionByReference(): number[];
/**
* Get the distance from the camera position to the focal point.
*/
getDistance(): number;
/**
*
* @defaultValue [0, 0, 0]
*/
getFocalPoint(): number[];
/**
*
*/
getFocalPointByReference(): number[];
/**
*
* @defaultValue false
*/
getFreezeFocalPoint(): boolean;
setFreezeFocalPoint(freeze: boolean): void;
/**
* Not implemented yet
* @param aspect - Camera frustum aspect ratio.
*/
getFrustumPlanes(aspect: number): void;
/**
* Not implemented yet
*/
getOrientation(): void;
/**
* Not implemented yet
*/
getOrientationWXYZ(): void;
/**
*
* @defaultValue false
*/
getParallelProjection(): boolean;
/**
*
* @defaultValue 1
*/
getParallelScale(): number;
/**
*
* @defaultValue 1.0
*/
getPhysicalScale(): number;
/**
*
* @param result -
*/
getPhysicalToWorldMatrix(result: mat4): void;
/**
*
*/
getPhysicalTranslation(): number[];
/**
*
*/
getPhysicalTranslationByReference(): number[];
/**
*
* @defaultValue [0, 0, -1],
*/
getPhysicalViewNorth(): number[];
/**
*
*/
getPhysicalViewNorthByReference(): number[];
/**
*
* @defaultValue [0, 1, 0]
*/
getPhysicalViewUp(): number[];
/**
*
*/
getPhysicalViewUpByReference(): number[];
/**
* Get the position of the camera in world coordinates.
* @defaultValue [0, 0, 1]
*/
getPosition(): number[];
/**
*
*/
getPositionByReference(): number[];
/**
*
* @param aspect - Camera frustum aspect ratio.
* @param nearz - Camera frustum near plane.
* @param farz - Camera frustum far plane.
* @defaultValue null
*/
getProjectionMatrix(aspect: number, nearz: number, farz: number): null | mat4;
/**
* Not implemented yet
* Get the roll angle of the camera about the direction of projection.
*/
getRoll(): void;
/**
* Get top left corner point of the screen.
* @defaultValue [-0.5, -0.5, -0.5]
*/
getScreenBottomLeft(): number[];
/**
*
* @defaultValue [-0.5, -0.5, -0.5]
*/
getScreenBottomLeftByReference(): number[];
/**
* Get bottom left corner point of the screen
* @defaultValue [0.5, -0.5, -0.5]
*/
getScreenBottomRight(): number[];
/**
*
* @defaultValue [0.5, -0.5, -0.5]
*/
getScreenBottomRightByReference(): number[];
/**
*
* @defaultValue [0.5, 0.5, -0.5]
*/
getScreenTopRight(): number[];
/**
*
* @defaultValue [0.5, 0.5, -0.5]
*/
getScreenTopRightByReference(): number[];
/**
* Get the center of the window in viewport coordinates.
*/
getThickness(): number;
/**
* Get the value of the UseHorizontalViewAngle instance variable.
* @defaultValue false
*/
getUseHorizontalViewAngle(): boolean;
/**
* Get use offaxis frustum.
* @defaultValue false
*/
getUseOffAxisProjection(): boolean;
/**
* Get the camera view angle.
* @defaultValue 30
*/
getViewAngle(): number;
/**
*
* @defaultValue null
*/
getViewMatrix(): null | mat4;
/**
* Get the ViewPlaneNormal.
* This vector will point opposite to the direction of projection,
* unless you have created a sheared output view using SetViewShear/SetObliqueAngles.
* @defaultValue [0, 0, 1]
*/
getViewPlaneNormal(): number[];
/**
* Get the ViewPlaneNormal by reference.
*/
getViewPlaneNormalByReference(): number[];
/**
* Get ViewUp vector.
* @defaultValue [0, 1, 0]
*/
getViewUp(): number[];
/**
* Get ViewUp vector by reference.
* @defaultValue [0, 1, 0]
*/
getViewUpByReference(): number[];
/**
* Get the center of the window in viewport coordinates.
* The viewport coordinate range is ([-1,+1],[-1,+1]).
* @defaultValue [0, 0]
*/
getWindowCenter(): number[];
/**
*
* @defaultValue [0, 0]
*/
getWindowCenterByReference(): number[];
/**
*
* @param result -
*/
getWorldToPhysicalMatrix(result: mat4): void;
/**
*
* @defaultValue false
*/
getIsPerformingCoordinateTransformation(status: boolean): void;
/**
* Recompute the ViewUp vector to force it to be perpendicular to the camera's focalpoint vector.
*/
orthogonalizeViewUp(): void;
/**
*
* @param ori -
*/
physicalOrientationToWorldDirection(ori: number[]): any;
/**
* Rotate the focal point about the cross product of the view up vector and the direction of projection, using the camera's position as the center of rotation.
* @param angle -
*/
pitch(angle: number): void;
/**
* Rotate the camera about the direction of projection.
* @param angle -
*/
roll(angle: number): void;
/**
* Set the location of the near and far clipping planes along the direction
* of projection.
* @param near -
* @param far -
*/
setClippingRange(near: number, far: number): boolean;
/**
* Set the location of the near and far clipping planes along the direction
* of projection.
* @param clippingRange -
*/
setClippingRange(clippingRange: number[]): boolean;
/**
*
* @param clippingRange -
*/
setClippingRangeFrom(clippingRange: number[]): boolean;
/**
* used to handle convert js device orientation angles
* when you use this method the camera will adjust to the
* device orientation such that the physicalViewUp you set
* in world coordinates looks up, and the physicalViewNorth
* you set in world coorindates will (maybe) point north
*
* NOTE WARNING - much of the documentation out there on how
* orientation works is seriously wrong. Even worse the Chrome
* device orientation simulator is completely wrong and should
* never be used. OMG it is so messed up.
*
* how it seems to work on iOS is that the device orientation
* is specified in extrinsic angles with a alpha, beta, gamma
* convention with axes of Z, X, Y (the code below substitutes
* the physical coordinate system for these axes to get the right
* modified coordinate system.
* @param alpha -
* @param beta -
* @param gamma -
* @param screen -
*/
setDeviceAngles(
alpha: number,
beta: number,
gamma: number,
screen: number
): boolean;
/**
*
* @param x - The x coordinate.
* @param y - The y coordinate.
* @param z - The z coordinate.
*/
setDirectionOfProjection(x: number, y: number, z: number): boolean;
/**
*
* @param distance -
*/
setDistance(distance: number): boolean;
/**
*
* @param x - The x coordinate.
* @param y - The y coordinate.
* @param z - The z coordinate.
*/
setFocalPoint(x: number, y: number, z: number): boolean;
/**
*
* @param focalPoint -
*/
setFocalPointFrom(focalPoint: number[]): boolean;
/**
* Not implement yet
* Set the oblique viewing angles.
* The first angle, alpha, is the angle (measured from the horizontal) that rays along
* the direction of projection will follow once projected onto the 2D screen.
* The second angle, beta, is the angle between the view plane and the direction of projection.
* This creates a shear transform x' = x + dz*cos(alpha)/tan(beta), y' = dz*sin(alpha)/tan(beta) where dz is the distance of the point from the focal plane.
* The angles are (45,90) by default. Oblique projections commonly use (30,63.435).
*
* @param alpha -
* @param beta -
*/
setObliqueAngles(alpha: number, beta: number): boolean;
/**
*
* @param degrees -
* @param x - The x coordinate.
* @param y - The y coordinate.
* @param z - The z coordinate.
*/
setOrientationWXYZ(degrees: number, x: number, y: number, z: number): boolean;
/**
*
* @param parallelProjection -
*/
setParallelProjection(parallelProjection: boolean): boolean;
/**
*
* @param parallelScale -
*/
setParallelScale(parallelScale: number): boolean;
/**
*
* @param physicalScale -
*/
setPhysicalScale(physicalScale: number): boolean;
/**
*
* @param x - The x coordinate.
* @param y - The y coordinate.
* @param z - The z coordinate.
*/
setPhysicalTranslation(x: number, y: number, z: number): boolean;
/**
*
* @param physicalTranslation -
*/
setPhysicalTranslationFrom(physicalTranslation: number[]): boolean;
/**
*
* @param x - The x coordinate.
* @param y - The y coordinate.
* @param z - The z coordinate.
*/
setPhysicalViewNorth(x: number, y: number, z: number): boolean;
/**
*
* @param physicalViewNorth -
*/
setPhysicalViewNorthFrom(physicalViewNorth: number[]): boolean;
/**
*
* @param x - The x coordinate.
* @param y - The y coordinate.
* @param z - The z coordinate.
*/
setPhysicalViewUp(x: number, y: number, z: number): boolean;
/**
*
* @param physicalViewUp -
*/
setPhysicalViewUpFrom(physicalViewUp: number[]): boolean;
/**
* Set the position of the camera in world coordinates.
* @param x - The x coordinate.
* @param y - The y coordinate.
* @param z - The z coordinate.
*/
setPosition(x: number, y: number, z: number): boolean;
/**
*
* @param mat -
*/
setProjectionMatrix(mat: mat4): boolean;
/**
* Set the roll angle of the camera about the direction of projection.
* todo Not implemented yet
* @param angle -
*/
setRoll(angle: number): boolean;
/**
* Set top left corner point of the screen.
*
* This will be used only for offaxis frustum calculation.
* @param x - The x coordinate.
* @param y - The y coordinate.
* @param z - The z coordinate.
*/
setScreenBottomLeft(x: number, y: number, z: number): boolean;
/**
* Set top left corner point of the screen.
*
* This will be used only for offaxis frustum calculation.
* @param screenBottomLeft -
*/
setScreenBottomLeft(screenBottomLeft: number[]): boolean;
/**
*
* @param screenBottomLeft -
*/
setScreenBottomLeftFrom(screenBottomLeft: number[]): boolean;
/**
*
* @param x - The x coordinate.
* @param y - The y coordinate.
* @param z - The z coordinate.
*/
setScreenBottomRight(x: number, y: number, z: number): boolean;
/**
*
* @param screenBottomRight -
*/
setScreenBottomRight(screenBottomRight: number[]): boolean;
/**
*
* @param screenBottomRight -
*/
setScreenBottomRightFrom(screenBottomRight: number[]): boolean;
/**
* Set top right corner point of the screen.
*
* This will be used only for offaxis frustum calculation.
* @param x - The x coordinate.
* @param y - The y coordinate.
* @param z - The z coordinate.
*/
setScreenTopRight(x: number, y: number, z: number): boolean;
/**
* Set top right corner point of the screen.
*
* This will be used only for offaxis frustum calculation.
* @param screenTopRight -
*/
setScreenTopRight(screenTopRight: number[]): boolean;
/**
*
* @param screenTopRight -
*/
setScreenTopRightFrom(screenTopRight: number[]): boolean;
/**
* Set the distance between clipping planes.
*
* This method adjusts the far clipping plane to be set a distance 'thickness' beyond the near clipping plane.
* @param thickness -
*/
setThickness(thickness: number): boolean;
/**
*
* @param thickness -
*/
setThicknessFromFocalPoint(thickness: number): boolean;
/**
*
* @param useHorizontalViewAngle -
*/
setUseHorizontalViewAngle(useHorizontalViewAngle: boolean): boolean;
/**
* Set use offaxis frustum.
*
* OffAxis frustum is used for off-axis frustum calculations specifically for
* stereo rendering. For reference see "High Resolution Virtual Reality", in
* Proc. SIGGRAPH '92, Computer Graphics, pages 195-202, 1992.
* @param useOffAxisProjection -
*/
setUseOffAxisProjection(useOffAxisProjection: boolean): boolean;
/**
* Set the camera view angle, which is the angular height of the camera view measured in degrees.
* @param viewAngle -
*/
setViewAngle(viewAngle: number): boolean;
/**
*
* @param mat -
*/
setViewMatrix(mat: mat4): boolean;
/**
*
* @param x - The x coordinate.
* @param y - The y coordinate.
* @param z - The z coordinate.
*/
setViewUp(x: number, y: number, z: number): boolean;
/**
*
* @param viewUp -
*/
setViewUp(viewUp: number[]): boolean;
/**
*
* @param viewUp -
*/
setViewUpFrom(viewUp: number[]): boolean;
/**
* Set the center of the window in viewport coordinates.
* The viewport coordinate range is ([-1,+1],[-1,+1]).
* This method is for if you have one window which consists of several viewports, or if you have several screens which you want to act together as one large screen
* @param x - The x coordinate.
* @param y - The y coordinate.
*/
setWindowCenter(x: number, y: number): boolean;
/**
* Set the center of the window in viewport coordinates from an array.
* @param windowCenter -
*/
setWindowCenterFrom(windowCenter: number[]): boolean;
/**
*
* @param x - The x coordinate.
* @param y - The y coordinate.
* @param z - The z coordinate.
*/
translate(x: number, y: number, z: number): void;
/**
* Rotate the focal point about the view up vector, using the camera's position as the center of rotation.
* @param angle -
*/
yaw(angle: number): void;
/**
* In perspective mode, decrease the view angle by the specified factor.
* @param factor -
*/
zoom(factor: number): void;
/**
* Activate camera clipping customization necessary when doing coordinate transformations
* @param status -
*/
setIsPerformingCoordinateTransformation(status: boolean): void;
}
const DEFAULT_VALUES = {
isPerformingCoordinateTransformation: false,
};
/**
* Method use to decorate a given object (publicAPI+model) with vtkRenderer characteristics.
*
* @param publicAPI - object on which methods will be bounds (public)
* @param model - object on which data structure will be bounds (protected)
* @param initialValues -
*/
function extend(
publicAPI: any,
model: any,
initialValues: ICameraInitialValues = {}
): void {
Object.assign(model, DEFAULT_VALUES, initialValues);
vtkCamera.extend(publicAPI, model, initialValues);
macro.setGet(publicAPI, model, ['isPerformingCoordinateTransformation']);
// Object methods
vtkSlabCamera(publicAPI, model);
}
/**
* Method use to create a new instance of vtkCamera with its focal point at the origin,
* and position=(0,0,1). The view up is along the y-axis, view angle is 30 degrees,
* and the clipping range is (.1,1000).
* @param initialValues - for pre-setting some of its content
*/
const newInstance: (initialValues?: ICameraInitialValues) => vtkSlabCamera =
macro.newInstance(extend, 'vtkSlabCamera');
/**
* vtkCamera is a virtual camera for 3D rendering. It provides methods
* to position and orient the view point and focal point. Convenience
* methods for moving about the focal point also are provided. More
* complex methods allow the manipulation of the computer graphics model
* including view up vector, clipping planes, and camera perspective.
*/
/**
* vtkSlabCamera - A derived class of the core vtkCamera class
*
* This customization is necesssary because when we do coordinate transformations
* we need to set the cRange between [d, d + 0.1],
* where d is distance between the camera position and the focal point.
* While when we render we set to the clippingRange [0.01, d * 2],
* where d is the calculated from the bounds of all the actors.
*
* @param {*} publicAPI The public API to extend
* @param {*} model The private model to extend.
*/
function vtkSlabCamera(publicAPI, model) {
model.classHierarchy.push('vtkSlabCamera');
// Set up private variables and methods
const tmpMatrix = mat4.identity(new Float64Array(16) as unknown as mat4);
const tmpvec1 = new Float64Array(3) as unknown as vec3;
/**
* getProjectionMatrix - A fork of vtkCamera's getProjectionMatrix method.
* This fork performs most of the same actions, but define crange around
* model.distance when doing coordinate transformations.
*/
publicAPI.getProjectionMatrix = (aspect, nearz, farz) => {
const result = mat4.create();
Iif (model.projectionMatrix) {
const scale = 1 / model.physicalScale;
vec3.set(tmpvec1, scale, scale, scale);
mat4.copy(result, model.projectionMatrix);
mat4.scale(result, result, tmpvec1);
mat4.transpose(result, result);
return result;
}
mat4.identity(tmpMatrix);
let cRange0 = model.clippingRange[0];
let cRange1 = model.clippingRange[1];
if (model.isPerformingCoordinateTransformation) {
/**
* NOTE: this is necessary because we want the coordinate transformation
* respect to the view plane (plane orthogonal to the camera and passing to
* the focal point).
*
* When vtk.js computes the coordinate transformations, it simply uses the
* camera matrix (no ray casting).
*
* However for the volume viewport the clipping range is set to be
* (-RENDERING_DEFAULTS.MAXIMUM_RAY_DISTANCE, RENDERING_DEFAULTS.MAXIMUM_RAY_DISTANCE).
* The clipping range is used in the camera method getProjectionMatrix().
* The projection matrix is used then for viewToWorld/worldToView methods of
* the renderer. This means that vkt.js will not return the coordinates of
* the point on the view plane (i.e. the depth coordinate will corresponded
* to the focal point).
*
* Therefore the clipping range has to be set to (distance, distance + 0.01),
* where now distance is the distance between the camera position and focal
* point. This is done internally, in our camera customization when the flag
* isPerformingCoordinateTransformation is set to true.
*/
cRange0 = model.distance;
cRange1 = model.distance + 0.1;
}
const cWidth = cRange1 - cRange0;
const cRange = [
cRange0 + ((nearz + 1) * cWidth) / 2.0,
cRange0 + ((farz + 1) * cWidth) / 2.0,
];
if (model.parallelProjection) {
// set up a rectangular parallelipiped
const width = model.parallelScale * aspect;
const height = model.parallelScale;
const xmin = (model.windowCenter[0] - 1.0) * width;
const xmax = (model.windowCenter[0] + 1.0) * width;
const ymin = (model.windowCenter[1] - 1.0) * height;
const ymax = (model.windowCenter[1] + 1.0) * height;
mat4.ortho(tmpMatrix, xmin, xmax, ymin, ymax, cRange[0], cRange[1]);
mat4.transpose(tmpMatrix, tmpMatrix);
} else Eif (model.useOffAxisProjection) {
throw new Error('Off-Axis projection is not supported at this time');
} else {
const tmp = Math.tan(vtkMath.radiansFromDegrees(model.viewAngle) / 2.0);
let width;
let height;
if (model.useHorizontalViewAngle === true) {
width = cRange0 * tmp;
height = (cRange0 * tmp) / aspect;
} else {
width = cRange0 * tmp * aspect;
height = cRange0 * tmp;
}
const xmin = (model.windowCenter[0] - 1.0) * width;
const xmax = (model.windowCenter[0] + 1.0) * width;
const ymin = (model.windowCenter[1] - 1.0) * height;
const ymax = (model.windowCenter[1] + 1.0) * height;
const znear = cRange[0];
const zfar = cRange[1];
tmpMatrix[0] = (2.0 * znear) / (xmax - xmin);
tmpMatrix[5] = (2.0 * znear) / (ymax - ymin);
tmpMatrix[2] = (xmin + xmax) / (xmax - xmin);
tmpMatrix[6] = (ymin + ymax) / (ymax - ymin);
tmpMatrix[10] = -(znear + zfar) / (zfar - znear);
tmpMatrix[14] = -1.0;
tmpMatrix[11] = (-2.0 * znear * zfar) / (zfar - znear);
tmpMatrix[15] = 0.0;
}
mat4.copy(result, tmpMatrix);
return result;
};
}
// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
export default { newInstance, extend };
export { newInstance, extend };
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