const _custom = function (colors, steps?) {
steps = steps || 32;
const subPaletteSize = Math.ceil(steps / (colors.length - 1));
const range = [];
let prevColor = null;
colors.forEach(function (color) {
if (prevColor) {
const scale = d3ScaleLinear()
.domain([0, subPaletteSize])
.range([prevColor, color])
.interpolate(d3InterpolateLab as any)
;
for (let i = 0; i < subPaletteSize; ++i) {
range.push(scale(i));
}
}
prevColor = color;
});
scale = d3ScaleQuantize().domain([0, 100]).range(range);
return scale;
};
colorInterpolator = d3Scale.interpolateWarm; colorInterpolator = d3Scale.interpolateCool; colorInterpolator = d3Scale.interpolateCubehelixDefault; // ------------------------------------------------------------------------------- // Quantize Scale Factory // ------------------------------------------------------------------------------- // scaleQuantize() ----------------------------------------------------------------- let quantizeScaleNumber: d3Scale.ScaleQuantize<number>; let quantizeScaleString: d3Scale.ScaleQuantize<string>; quantizeScaleNumber = d3Scale.scaleQuantize(); quantizeScaleString = d3Scale.scaleQuantize<string>(); // ScaleQuantize Interface ======================================================== // domain(...) ----------------------------------------------------------------- quantizeScaleNumber = quantizeScaleNumber.domain([0, 1]); quantizeScaleNumber = quantizeScaleNumber.domain([new NumCoercible(0), new NumCoercible(100)]); const domainQuantize: [number, number] = quantizeScaleNumber.domain(); // range(...) ----------------------------------------------------------------- quantizeScaleNumber = quantizeScaleNumber.range(rangeNumbers); rangeNumbers = quantizeScaleNumber.range();