How can i implement reset camera features in volume rendering?

Hi all,
I am wondering how can I implement reset camera features in my volume render visualizer similar to what I saw in the itk-vtk viewer.

Hi,

Do you mean place the camera to view along the X, Y and Z axes? Something else? Can you be more specific?

regards,

Paulo

You can check out how itk-vtk-viewer handles camera resets in the repo.

Hello Forrest,
Thanks for the link. I was able to reset the camera but couldn’t reset the cropping plane as I did the same thing done in itk-vtk-viewer. And the thing is I didn’t get any errors, therefore, I did not understand what am I doing wrong.

const { vec3, vec2, quat, mat4} = glMatrix;

function transformVec3(ain, transform) {
  const vout = new Float64Array(3);
  vec3.transformMat4(vout, ain, transform);
  return vout;
}

function resetCroppingPlanes(volume_imageData) {
  const dims = volume_imageData.getDimensions()
  console.log(dims)
  const direction = volume_imageData.getDirection()
    console.log(direction)

  const indexToWorld = volume_imageData.getIndexToWorld()
    console.log(indexToWorld)

  const croppingPlanes = [
    {
      origin: Array.from(transformVec3([0, 0, 0], indexToWorld)),
      normal: Array.from(direction.slice(0, 3)),
    },
    {
      origin: Array.from(transformVec3([dims[0], dims[1], dims[2]], indexToWorld)),
      normal: vtkMath.multiplyScalar(Array.from(direction.slice(0, 3)), -1),
    },
    {
      origin: Array.from(transformVec3([0, 0, 0], indexToWorld)),
      normal: Array.from(direction.slice(3, 6)),
    },
    {
      origin: Array.from(transformVec3([dims[0], dims[1], dims[2]], indexToWorld)),
      normal: vtkMath.multiplyScalar(Array.from(direction.slice(3, 6)), -1),
    },
    {
      origin: Array.from(transformVec3([0, 0, 0], indexToWorld)),
      normal: Array.from(direction.slice(6, 9)),
    },
    {
      origin: Array.from(transformVec3([dims[0], dims[1], dims[2]], indexToWorld)),
      normal: vtkMath.multiplyScalar(Array.from(direction.slice(6, 9)), -1),
    },
  ]
}
const CropReset = document.getElementById('CropReset');
CropReset.addEventListener('click', () => {
        resetCroppingPlanes(volume_imageData_obj[0]);
        renderWindow.render();
});
**```**
**Console log output:**
dims = [1024, 1024, 73]
direction = Float64Array(9) [1, 0, 0, 0, 1, 0, 0, 0, 1, buffer: ArrayBuffer(72), byteLength: 72, byteOffset: 0, length: 9, Symbol(Symbol.toStringTag): 'Float64Array']
IndexToWorld = Float64Array(16) [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, buffer: ArrayBuffer(128), byteLength: 128, byteOffset: 0, length: 16, Symbol(Symbol.toStringTag): 'Float64Array']

Can you provide me some suggestions regarding it?

Are you setting the cropping planes on the volume mapper? It doesn’t seem like you’re doing anything with croppingPlanes in your reset function.