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import vtkDataArray from 'vtk.js/Sources/Common/Core/DataArray';
import Constants from 'vtk.js/Sources/Common/Core/ScalarsToColors/Constants';
import vtkMapper from 'vtk.js/Sources/Rendering/Core/Mapper/Constants'; // Need to go inside Constants otherwise dependency loop
const { ScalarMappingTarget, VectorMode } = Constants;
const { VtkDataTypes } = vtkDataArray;
const { ColorMode } = vtkMapper;
const { vtkErrorMacro } = macro;
// ----------------------------------------------------------------------------
// Global methods
// ----------------------------------------------------------------------------
// Add module-level functions or api that you want to expose statically via
// the next section...
// ----------------------------------------------------------------------------
// Static API
// ----------------------------------------------------------------------------
function intColorToUChar(c) {
return c;
}
function floatColorToUChar(c) {
return Math.floor(c * 255.0 + 0.5);
}
// ----------------------------------------------------------------------------
// vtkScalarsToColors methods
// ----------------------------------------------------------------------------
function vtkScalarsToColors(publicAPI, model) {
// Set our className
model.classHierarchy.push('vtkScalarsToColors');
publicAPI.setVectorModeToMagnitude = () =>
publicAPI.setVectorMode(VectorMode.MAGNITUDE);
publicAPI.setVectorModeToComponent = () =>
publicAPI.setVectorMode(VectorMode.COMPONENT);
publicAPI.setVectorModeToRGBColors = () =>
publicAPI.setVectorMode(VectorMode.RGBCOLORS);
publicAPI.build = () => {};
publicAPI.isOpaque = () => true;
//----------------------------------------------------------------------------
publicAPI.setAnnotations = (values, annotations) => {
Iif ((values && !annotations) || (!values && annotations)) {
return;
}
Iif (values && annotations && values.length !== annotations.length) {
vtkErrorMacro(
'Values and annotations do not have the same number of tuples so ignoring'
);
return;
}
model.annotationArray = [];
if (annotations && values) {
const num = annotations.length;
for (let i = 0; i < num; i++) {
model.annotationArray.push({
value: values[i],
annotation: String(annotations[i]),
});
}
}
publicAPI.updateAnnotatedValueMap();
publicAPI.modified();
};
//----------------------------------------------------------------------------
publicAPI.setAnnotation = (value, annotation) => {
let i = publicAPI.checkForAnnotatedValue(value);
let modified = false;
Iif (i >= 0) {
if (model.annotationArray[i].annotation !== annotation) {
model.annotationArray[i].annotation = annotation;
modified = true;
}
} else {
model.annotationArray.push({ value, annotation });
i = model.annotationArray.length - 1;
modified = true;
}
if (modified) {
publicAPI.updateAnnotatedValueMap();
publicAPI.modified();
}
return i;
};
//----------------------------------------------------------------------------
publicAPI.getNumberOfAnnotatedValues = () => model.annotationArray.length;
//----------------------------------------------------------------------------
publicAPI.getAnnotatedValue = (idx) => {
if (idx < 0 || idx >= model.annotationArray.length) {
return null;
}
return model.annotationArray[idx].value;
};
//----------------------------------------------------------------------------
publicAPI.getAnnotation = (idx) => {
if (model.annotationArray[idx] === undefined) {
return null;
}
return model.annotationArray[idx].annotation;
};
//----------------------------------------------------------------------------
publicAPI.getAnnotatedValueIndex = (val) =>
model.annotationArray.length ? publicAPI.checkForAnnotatedValue(val) : -1;
//----------------------------------------------------------------------------
publicAPI.removeAnnotation = (value) => {
const i = publicAPI.checkForAnnotatedValue(value);
const needToRemove = i >= 0;
if (needToRemove) {
model.annotationArray.splice(i, 1);
publicAPI.updateAnnotatedValueMap();
publicAPI.modified();
}
return needToRemove;
};
//----------------------------------------------------------------------------
publicAPI.resetAnnotations = () => {
model.annotationArray = [];
model.annotatedValueMap = [];
publicAPI.modified();
};
//----------------------------------------------------------------------------
publicAPI.getAnnotationColor = (val, rgba) => {
if (model.indexedLookup) {
const i = publicAPI.getAnnotatedValueIndex(val);
publicAPI.getIndexedColor(i, rgba);
} else {
publicAPI.getColor(parseFloat(val), rgba);
rgba[3] = 1.0;
}
};
//----------------------------------------------------------------------------
publicAPI.checkForAnnotatedValue = (value) =>
publicAPI.getAnnotatedValueIndexInternal(value);
//----------------------------------------------------------------------------
// An unsafe version of vtkScalarsToColors::CheckForAnnotatedValue for
// internal use (no pointer checks performed)
publicAPI.getAnnotatedValueIndexInternal = (value) => {
if (model.annotatedValueMap[value] !== undefined) {
const na = model.annotationArray.length;
return model.annotatedValueMap[value] % na;
}
// Treat as a NaN
return -1;
};
//----------------------------------------------------------------------------
publicAPI.getIndexedColor = (val, rgba) => {
rgba[0] = 0.0;
rgba[1] = 0.0;
rgba[2] = 0.0;
rgba[3] = 0.0;
};
//----------------------------------------------------------------------------
publicAPI.updateAnnotatedValueMap = () => {
model.annotatedValueMap = [];
const na = model.annotationArray.length;
for (let i = 0; i < na; i++) {
model.annotatedValueMap[model.annotationArray[i].value] = i;
}
};
// Description:
// Internal methods that map a data array into a 4-component,
// unsigned char RGBA array. The color mode determines the behavior
// of mapping. If ColorMode.DEFAULT is set, then unsigned char
// data arrays are treated as colors (and converted to RGBA if
// necessary); If ColorMode.DIRECT_SCALARS is set, then all arrays
// are treated as colors (integer types are clamped in the range 0-255,
// floating point arrays are clamped in the range 0.0-1.0. Note 'char' does
// not have enough values to represent a color so mapping this type is
// considered an error);
// otherwise, the data is mapped through this instance
// of ScalarsToColors. The component argument is used for data
// arrays with more than one component; it indicates which component
// to use to do the blending. When the component argument is -1,
// then the this object uses its own selected technique to change a
// vector into a scalar to map.
publicAPI.mapScalars = (scalars, colorMode, componentIn) => {
const numberOfComponents = scalars.getNumberOfComponents();
let newColors = null;
// map scalars through lookup table only if needed
if (
(colorMode === ColorMode.DEFAULT &&
(scalars.getDataType() === VtkDataTypes.UNSIGNED_CHAR ||
scalars.getDataType() === VtkDataTypes.UNSIGNED_CHAR_CLAMPED)) ||
(colorMode === ColorMode.DIRECT_SCALARS && scalars)
) {
newColors = publicAPI.convertToRGBA(
scalars,
numberOfComponents,
scalars.getNumberOfTuples()
);
} else {
const newscalars = {
type: 'vtkDataArray',
name: 'temp',
numberOfComponents: 4,
dataType: VtkDataTypes.UNSIGNED_CHAR,
};
const s = macro.newTypedArray(
newscalars.dataType,
4 * scalars.getNumberOfTuples()
);
newscalars.values = s;
newscalars.size = s.length;
newColors = vtkDataArray.newInstance(newscalars);
let component = componentIn;
// If mapper did not specify a component, use the VectorMode
if (component < 0 && numberOfComponents > 1) {
publicAPI.mapVectorsThroughTable(
scalars,
newColors,
ScalarMappingTarget.RGBA,
-1,
-1
);
} else {
if (component < 0) {
component = 0;
}
Iif (component >= numberOfComponents) {
component = numberOfComponents - 1;
}
// Map the scalars to colors
publicAPI.mapScalarsThroughTable(
scalars,
newColors,
ScalarMappingTarget.RGBA,
component
);
}
}
return newColors;
};
publicAPI.mapVectorsToMagnitude = (input, output, compsToUse) => {
const length = input.getNumberOfTuples();
const inIncr = input.getNumberOfComponents();
const outputV = output.getData();
const inputV = input.getData();
for (let i = 0; i < length; i++) {
let sum = 0.0;
for (let j = 0; j < compsToUse; j++) {
sum += inputV[i * inIncr + j] * inputV[i * inIncr + j];
}
outputV[i] = Math.sqrt(sum);
}
};
//----------------------------------------------------------------------------
// Map a set of vector values through the table
publicAPI.mapVectorsThroughTable = (
input,
output,
outputFormat,
vectorComponentIn,
vectorSizeIn
) => {
let vectorMode = publicAPI.getVectorMode();
let vectorSize = vectorSizeIn;
let vectorComponent = vectorComponentIn;
const inComponents = input.getNumberOfComponents();
if (vectorMode === VectorMode.COMPONENT) {
// make sure vectorComponent is within allowed range
if (vectorComponent === -1) {
// if set to -1, use default value provided by table
vectorComponent = publicAPI.getVectorComponent();
}
Iif (vectorComponent < 0) {
vectorComponent = 0;
}
Iif (vectorComponent >= inComponents) {
vectorComponent = inComponents - 1;
}
} else E{
// make sure vectorSize is within allowed range
if (vectorSize === -1) {
// if set to -1, use default value provided by table
vectorSize = publicAPI.getVectorSize();
}
if (vectorSize <= 0) {
vectorComponent = 0;
vectorSize = inComponents;
} else {
if (vectorComponent < 0) {
vectorComponent = 0;
}
if (vectorComponent >= inComponents) {
vectorComponent = inComponents - 1;
}
if (vectorComponent + vectorSize > inComponents) {
vectorSize = inComponents - vectorComponent;
}
}
if (
vectorMode === VectorMode.MAGNITUDE &&
(inComponents === 1 || vectorSize === 1)
) {
vectorMode = VectorMode.COMPONENT;
}
}
// increment input pointer to the first component to map
let inputOffset = 0;
if (vectorComponent > 0) {
inputOffset = vectorComponent;
}
// map according to the current vector mode
switch (vectorMode) {
case VectorMode.COMPONENT: {
publicAPI.mapScalarsThroughTable(
input,
output,
outputFormat,
inputOffset
);
break;
}
case VectorMode.RGBCOLORS: {
// publicAPI.mapColorsToColors(
// input, output, inComponents, vectorSize,
// outputFormat);
break;
}
// MAGNITUDE is considered default
case VectorMode.MAGNITUDE:
default: {
const magValues = vtkDataArray.newInstance({
numberOfComponents: 1,
values: new Float32Array(input.getNumberOfTuples()),
});
publicAPI.mapVectorsToMagnitude(input, magValues, vectorSize);
publicAPI.mapScalarsThroughTable(magValues, output, outputFormat, 0);
break;
}
}
};
publicAPI.luminanceToRGBA = (newColors, colors, alpha, convtFun) => {
const a = convtFun(alpha);
const values = colors.getData();
const newValues = newColors.getData();
const size = values.length;
const component = 0;
const tuple = 1;
let count = 0;
for (let i = component; i < size; i += tuple) {
const l = convtFun(values[i]);
newValues[count * 4] = l;
newValues[count * 4 + 1] = l;
newValues[count * 4 + 2] = l;
newValues[count * 4 + 3] = a;
count++;
}
};
publicAPI.luminanceAlphaToRGBA = (newColors, colors, alpha, convtFun) => {
const values = colors.getData();
const newValues = newColors.getData();
const size = values.length;
const component = 0;
const tuple = 2;
let count = 0;
for (let i = component; i < size; i += tuple) {
const l = convtFun(values[i]);
newValues[count] = l;
newValues[count + 1] = l;
newValues[count + 2] = l;
newValues[count + 3] = convtFun(values[i + 1]) * alpha;
count += 4;
}
};
publicAPI.rGBToRGBA = (newColors, colors, alpha, convtFun) => {
const a = floatColorToUChar(alpha);
const values = colors.getData();
const newValues = newColors.getData();
const size = values.length;
const component = 0;
const tuple = 3;
let count = 0;
for (let i = component; i < size; i += tuple) {
newValues[count * 4] = convtFun(values[i]);
newValues[count * 4 + 1] = convtFun(values[i + 1]);
newValues[count * 4 + 2] = convtFun(values[i + 2]);
newValues[count * 4 + 3] = a;
count++;
}
};
publicAPI.rGBAToRGBA = (newColors, colors, alpha, convtFun) => {
const values = colors.getData();
const newValues = newColors.getData();
const size = values.length;
const component = 0;
const tuple = 4;
let count = 0;
for (let i = component; i < size; i += tuple) {
newValues[count * 4] = convtFun(values[i]);
newValues[count * 4 + 1] = convtFun(values[i + 1]);
newValues[count * 4 + 2] = convtFun(values[i + 2]);
newValues[count * 4 + 3] = convtFun(values[i + 3]) * alpha;
count++;
}
};
//----------------------------------------------------------------------------
publicAPI.convertToRGBA = (colors, numComp, numTuples) => {
let { alpha } = model;
if (
numComp === 4 &&
alpha >= 1.0 &&
colors.getDataType() === VtkDataTypes.UNSIGNED_CHAR
) {
return colors;
}
const newColors = vtkDataArray.newInstance({
numberOfComponents: 4,
empty: true,
size: 4 * numTuples,
dataType: VtkDataTypes.UNSIGNED_CHAR,
});
Iif (numTuples <= 0) {
return newColors;
}
alpha = alpha > 0 ? alpha : 0;
alpha = alpha < 1 ? alpha : 1;
let convtFun = intColorToUChar;
Iif (
colors.getDataType() === VtkDataTypes.FLOAT ||
colors.getDataType() === VtkDataTypes.DOUBLE
) {
convtFun = floatColorToUChar;
}
switch (numComp) {
case 1:
publicAPI.luminanceToRGBA(newColors, colors, alpha, convtFun);
break;
case 2:
publicAPI.luminanceAlphaToRGBA(newColors, colors, convtFun);
break;
case 3:
publicAPI.rGBToRGBA(newColors, colors, alpha, convtFun);
break;
case 4:
publicAPI.rGBAToRGBA(newColors, colors, alpha, convtFun);
break;
default:
vtkErrorMacro('Cannot convert colors');
return null;
}
return newColors;
};
publicAPI.usingLogScale = () => false;
publicAPI.getNumberOfAvailableColors = () => 256 * 256 * 256;
publicAPI.setRange = (min, max) => publicAPI.setMappingRange(min, max);
publicAPI.getRange = () => publicAPI.getMappingRange();
publicAPI.areScalarsOpaque = (scalars, colorMode, componentIn) => {
Iif (!scalars) {
return publicAPI.isOpaque();
}
const numberOfComponents = scalars.getNumberOfComponents();
// map scalars through lookup table only if needed
if (
(colorMode === ColorMode.DEFAULT &&
scalars.getDataType() === VtkDataTypes.UNSIGNED_CHAR) ||
colorMode === ColorMode.DIRECT_SCALARS
) {
// we will be using the scalars directly, so look at the number of
// components and the range
if (numberOfComponents === 3 || numberOfComponents === 1) {
return model.alpha >= 1.0;
}
// otherwise look at the range of the alpha channel
const range = scalars.getRange(numberOfComponents - 1);
return range[0] === 255;
}
return true;
};
}
// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------
const DEFAULT_VALUES = {
alpha: 1.0,
vectorComponent: 0,
vectorSize: -1,
vectorMode: VectorMode.COMPONENT,
mappingRange: null,
annotationArray: null,
annotatedValueMap: null,
indexedLookup: false,
};
// ----------------------------------------------------------------------------
export function extend(publicAPI, model, initialValues = {}) {
Object.assign(model, DEFAULT_VALUES, initialValues);
// Object methods
macro.obj(publicAPI, model);
model.mappingRange = [0, 255];
model.annotationArray = [];
model.annotatedValueMap = [];
// Create get-set macros
macro.setGet(publicAPI, model, [
'vectorSize',
'vectorComponent',
'vectorMode',
'alpha',
'indexedLookup',
]);
// Create set macros for array (needs to know size)
macro.setArray(publicAPI, model, ['mappingRange'], 2);
// Create get macros for array
macro.getArray(publicAPI, model, ['mappingRange']);
// For more macro methods, see "Sources/macros.js"
// Object specific methods
vtkScalarsToColors(publicAPI, model);
}
// ----------------------------------------------------------------------------
export const newInstance = macro.newInstance(extend, 'vtkScalarsToColors');
// ----------------------------------------------------------------------------
export default { newInstance, extend, ...Constants };
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