scoord3d.js

/*
 * Spatial coordinates of a geometric region of interest (ROI) in the DICOM
 * image coordinate system.
 */
class Scoord3D {

  constructor() {}

  get graphicData() {
    throw new Error('Propotype property "graphicData" must be implemented.');
  }

  get graphicType() {
    throw new Error('Propotype property "graphicType" must be implemented.');
  }

  get referencedFrameOfReferenceUID() {
    throw new Error('Propotype property "referencedFrameOfReferenceUID" must be implemented.');
  }
  
  get fiducialUID() {
    throw new Error('Propotype property "fiducialUID" must be implemented.');    
  }

}

class Point extends Scoord3D {

  constructor(coordinates) {
    super()
    this.coordinates = coordinates
  }

  get graphicData() {
    return this.coordinates;
  }

  get graphicType() {
    return 'POINT';
  }

}


class Multipoint extends Scoord3D {

  constructor(coordinates) {
    super()
    this.coordinates = coordinates
  }

  get graphicData() {
    return this.coordinates;
  }

  get graphicType() {
    return 'MULTIPOINT';
  }

}


class Polyline extends Scoord3D {

  constructor(coordinates) {
    super()
    this.coordinates = coordinates
  }

  get graphicData() {
    /*
     * A polyline is defined as a series of connected line segments
     * with ordered vertices denoted by (column,row) pairs.
     * If the first and last vertices are the same it is a closed polygon.
     */
    // TODO: sort coordinates, considering Polygons, where first entry must
    // equal last entry
    return this.coordinates;
  }

  get graphicType() {
    return 'POLYLINE';
  }

}

class Polygon extends Scoord3D {

  constructor(coordinates) {
    super()
    this.coordinates = coordinates
  }

  get graphicData() {
    /*
     * A polygon is defined a series of connected line segments with ordered vertices 
     * denoted by (x,y,z) triplets, where the first and last vertices shall be the same 
     * forming a polygon; the points shall be coplanar
     */
    // TODO: sort coordinates, make sure that the first and last vertices are the same
    return this.coordinates;
  }

  get graphicType() {
    return 'POLYGON';
  }

}


class Circle extends Scoord3D {

  constructor(centerCoordinates, radius) {
    super()
    this.centerCoordinates = centerCoordinates
    this.radius = radius
  }

  get graphicData() {
    /*
     * A circle defined by two (column,row) pairs.
     * The first point is the central pixel.
     * The second point is a pixel on the perimeter of the circle.
     */
    return [
      this.centerCoordinates,
      [this.centerCoordinates[0], this.centerCoordinates[1] + this.radius]];
  }

  get graphicType() {
    return 'CIRCLE';
  }

}


class Ellipse extends Scoord3D {

  constructor(majorAxisEndpointCoordinates, minorAxisEndpointCoordinates) {
    super()
    this.majorAxisEndpointCoordinates = majorAxisEndpointCoordinates
    this.minorAxisEndpointCoordinates = minorAxisEndpointCoordinates
  }

  get graphicData() {
    /*
     * An ellipse defined by four pixel (column,row) pairs.
     * The first two points specify the endpoints of the major axis.
     * The second two points specify the endpoints of the minor axis.
     */
    return [
      ...this.majorAxisEndpointCoordinates,
      ...this.minorAxisEndpointCoordinates
    ];
  }


  get graphicType() {
    return 'ELLIPSE';
  }

}


export { Point, Multipoint, Polyline, Polygon, Circle, Ellipse };