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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | 91x 91x 91x 91x 91x 91x 91x 91x 91x | import { vtkSharedVolumeMapper } from '../vtkClasses';
import { getConfiguration } from '../../init';
/**
* Given an imageData and a vtkOpenGLTexture, it creates a "shared" vtk volume mapper
* from which various volume actors can be created.
*
* @param imageData - the vtkImageData object that contains the data to
* render.
* @param vtkOpenGLTexture - The vtkOpenGLTexture that will be used to render
* the volume.
* @returns The volume mapper.
*/
export default function createVolumeMapper(
imageData: any,
vtkOpenGLTexture: any
): any {
const volumeMapper = vtkSharedVolumeMapper.newInstance();
Iif (getConfiguration().rendering.preferSizeOverAccuracy) {
volumeMapper.setPreferSizeOverAccuracy(true);
}
volumeMapper.setInputData(imageData);
const spacing = imageData.getSpacing();
// Set the sample distance to half the mean length of one side. This is where the divide by 6 comes from.
// https://github.com/Kitware/VTK/blob/6b559c65bb90614fb02eb6d1b9e3f0fca3fe4b0b/Rendering/VolumeOpenGL2/vtkSmartVolumeMapper.cxx#L344
const sampleDistance = (spacing[0] + spacing[1] + spacing[2]) / 6;
// This is to allow for good pixel level image quality.
// Todo: why we are setting this to 4000? Is this a good number? it should be configurable
volumeMapper.setMaximumSamplesPerRay(4000);
volumeMapper.setSampleDistance(sampleDistance);
volumeMapper.setScalarTexture(vtkOpenGLTexture);
return volumeMapper;
}
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