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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 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 | 1x 2x 364x 364x 43680x 364x 364x 364x 12086x 12086x 8442x 3644x 5818x 3280x 364x 364x 364x 364x 363x 363x 363x 726x 364x | import vtkColorMaps from '@kitware/vtk.js/Rendering/Core/ColorTransferFunction/ColorMaps';
import { ColormapPublic, ColormapRegistration } from '../types';
import isEqual from './isEqual';
import { actorIsA } from './actorCheck';
const _colormaps = new Map();
/**
* Register a colormap
* @param name - name of the colormap
* @param colormap - colormap object
*/
function registerColormap(colormap: ColormapRegistration) {
_colormaps.set(colormap.Name, colormap);
}
/**
* Get a colormap by name
* @param name - name of the colormap
* @returns colormap object
*/
function getColormap(name) {
return _colormaps.get(name);
}
/**
* Get all registered colormap names
* @returns array of colormap names
*
*/
function getColormapNames() {
return Array.from(_colormaps.keys());
}
/**
* Finds a colormap that matches the given RGB points.
*
* @param rgbPoints - The RGB points to match against the colormaps.
* @returns The matched colormap object or null if no match is found.
*/
function findMatchingColormap(rgbPoints, actor): ColormapPublic | null {
const colormapsVTK = vtkColorMaps.rgbPresetNames.map((presetName) =>
vtkColorMaps.getPresetByName(presetName)
);
const colormapsCS3D = getColormapNames().map((colormapName) =>
getColormap(colormapName)
);
const colormaps = colormapsVTK.concat(colormapsCS3D);
// Find the colormap that matches the given RGB points
const matchedColormap = colormaps.find((colormap) => {
const { RGBPoints: presetRGBPoints } = colormap;
if (presetRGBPoints.length !== rgbPoints.length) {
return false;
}
for (let i = 0; i < presetRGBPoints.length; i += 4) {
if (
!isEqual(
presetRGBPoints.slice(i + 1, i + 4),
rgbPoints.slice(i + 1, i + 4)
)
) {
return false;
}
}
return true;
});
Iif (!matchedColormap) {
return null;
}
const opacity = [];
if (actorIsA(actor, 'vtkVolume')) {
const opacityPoints = actor
.getProperty()
.getScalarOpacity(0)
.getDataPointer();
Iif (!opacityPoints) {
return {
name: matchedColormap.Name,
};
}
for (let i = 0; i < opacityPoints.length; i += 2) {
opacity.push({
value: opacityPoints[i],
opacity: opacityPoints[i + 1],
});
}
}
return {
name: matchedColormap.Name,
opacity,
};
}
export {
getColormap,
getColormapNames,
registerColormap,
findMatchingColormap,
};
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