NRRDLoader: Fix loading 16-bits file with custom axes.

[LinkunGao]

Related issue: #24501

Description

The key issue for this issue is that some 16-bit NRRD files do have not standard vectors.
So using the old if judgment statement cannot get a good result for loading them.

issue code:

const xIndex = headerObject.vectors.findIndex((vector) => vector[0] !== 0);
const yIndex = headerObject.vectors.findIndex((vector) => vector[1] !== 0);
const zIndex = headerObject.vectors.findIndex((vector) => vector[2] !== 0);

The 16-bit NRRD files vectors are like this below:

const vectors = [
  [0.803031719442651, -1.6481526752133598e-10, 0.02944583724545901],
  [1.647045751213251e-10, 0.80357140302658, 6.039481950867172e-12],
  [-0.04030796800931726, -5.359717066245572e-17, 1.0992581595808804],
];

Thus under this if statement, it will always get xIndex=yIndex=zIndex=0
Then for the axis array we always get only direction ["z"]. Not the ["x","y","z"].

So I add a new if statement inside this if to solve this issue:

let axisOrder = [];
if (xIndex !== yIndex && xIndex !== zIndex && yIndex !== zIndex) {
	axisOrder[xIndex] = "x";
	axisOrder[yIndex] = "y";
	axisOrder[zIndex] = "z";
} else {
	axisOrder = ["x", "y", "z"];
}

Instead

let axisOrder = [];
axisOrder[xIndex] = "x";
axisOrder[yIndex] = "y";
axisOrder[zIndex] = "z";

Then, as for the segmentation purpose, I also add a setSegementation() function.

        /**
	 *
	 * @param {boolean} segmentation is a option for user to choose
	 */
	setSegmentation(segmentation) {
		this.segmentation = segmentation;
	}

       ...

      if (!headerObject.vectors || this.segmentation) {
          volume.matrix.set(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
      }

If the user use loader.setSegementation(true) outside, we can get the NRRD Original size slices/images, not the RASDimention one size.

• Reset the code format