void eventDisplayCurrentDicom(object obj = null)
{
DICOM3D dicom = DICOMLoader.instance.currentDICOMVolume;
if (dicom != null)
{
SetDicom(dicom);
GetComponent <MeshRenderer> ().enabled = true;
}
}
/*! Set a volume DICOM which is to be rendered in 3D */
public void SetDicom(DICOM3D dicom)
{
Material mat = GetComponent <MeshRenderer> ().sharedMaterial;
Debug.Log("Min, max: " + (float)dicom.seriesInfo.minPixelValue + " " + (float)dicom.seriesInfo.maxPixelValue);
mat.SetFloat("globalMinimum", (float)dicom.seriesInfo.minPixelValue);
mat.SetFloat("globalMaximum", (float)dicom.seriesInfo.maxPixelValue);
mat.mainTexture = dicom.getTexture3D();
mat.SetVector("textureSize", new Vector3(dicom.texWidth, dicom.texHeight, dicom.texDepth));
// ------------------------------------------------
// Move the VolumeCube to the position where the 3D DICOM should be rendered:
// (The VolumeCube's localPosition and localScale is in the DICOM's "patient coordinate system", so
// adjusting its localPosition and localScale to fit with the DICOM's center and size will set it to
// the correct position.)
// Size which the volume should have at the end (in patient coordinates):
Vector3 goalSize = dicom.boundingBox.size;
// Position where the center of the rendered volume should be (in patient coordinates):
Vector3 goalCenter = dicom.boundingBox.center;
// Current (original) position and sizes of the mesh, because of the way it was generated:
Vector3 minMesh = new Vector3(-1, -1, -1);
Vector3 maxMesh = new Vector3(1, 1, 1);
Vector3 meshSize = maxMesh - minMesh;
// The padding factor takes into account that the DICOM volume may be smaller than the texture, since
// Unity requires power-of-two textures, so the texture may be larger than the DICOM volume.
Vector3 paddingFactor = new Vector3(
(float)dicom.origTexWidth / (float)dicom.texWidth,
(float)dicom.origTexHeight / (float)dicom.texHeight,
(float)dicom.origTexDepth / (float)dicom.texDepth);
// Part of the mesh which actually holds the DICOM volume:
Vector3 paddedMeshSize = Vector3.Scale(paddingFactor, meshSize);
// Center of the part of the mesh which is filled with the DICOM volume:
Vector3 meshCenter = minMesh + paddedMeshSize * 0.5f;
// Offset from the mesh original center (which is, because of the way the mesh was generated above, zero):
Vector3 meshCenterOffset = Vector3.zero - meshCenter;
// Inverse of paddedMeshSize:
Vector3 invPaddedMeshSize = new Vector3(1f / paddedMeshSize.x, 1f / paddedMeshSize.y, 1f / paddedMeshSize.z);
// The final scale is the goalSize/paddedMeshSize:
Vector3 scale = Vector3.Scale(goalSize, invPaddedMeshSize);
transform.localScale = scale;
// Move the mesh center to its final position:
transform.localPosition = goalCenter + Vector3.Scale(meshCenterOffset, scale);
// ------------------------------------------------
}
