Pure geometry helpers behind Sparkline and ProjectActivityChart.
Computes polyline points, alpha-fade gradient stops, and the end-dot position for a series of values, so components stay thin and the math is testable and reusable outside Svelte.
5 declarations
(values: number[], options: SparklineOptions): SparklineGeometry | null import {sparkline_geometry} from '@fuzdev/fuz_ui/sparkline.js'; Computes the rendering geometry for a sparkline of values.
Returns null when values has fewer than 2 points, which cannot form a line.
valuesnumber[]optionsSparklineGeometry | null
SparklineGeometry import type {SparklineGeometry} from '@fuzdev/fuz_ui/sparkline.js'; pointsSVG polyline points string.
type string
stopsAlpha-fade gradient stops, thinned to runs' boundaries so long flat stretches (like all-zero history) cost a constant number of stops.
type SparklineStop[]
end_xX coordinate of the final point.
type number
end_yY coordinate of the final point.
type number
end_alphaAlpha of the final point.
type number
dot_radiusRadius for an end dot, equal to the stroke width.
type number
SparklineOptions import type {SparklineOptions} from '@fuzdev/fuz_ui/sparkline.js'; widthWidth of the drawing area in px.
type number
heightHeight of the drawing area in px.
type number
max?The value rendered at full height and full alpha. Pass a shared max across sparklines for comparable scales. Defaults to the local max of the values.
type number
scale?Vertical scale for the line's geometry. The alpha fade always tracks
the linear ratio regardless of scale.
type SparklineScale
'linear'stroke_width?type number
2alpha_floor?Alpha at a value of 0, scaling linearly to 1 at the max.
type number
0.4end_dot?Reserve padding for an end dot of radius stroke_width at the final point.
type boolean
falseSparklineScale type SparklineScale
import type {SparklineScale} from '@fuzdev/fuz_ui/sparkline.js'; Vertical scale for a sparkline's geometry. The nonlinear options compress
the top of the range so small values stay legible under a large shared
max — increasingly so from 'sqrt' to smaller power exponents (a number
in (0, 1], where 1 is linear and 1 / 3 is cube root) to 'log'.
SparklineStop import type {SparklineStop} from '@fuzdev/fuz_ui/sparkline.js'; A gradient stop for the per-point alpha fade.
offsetGradient offset in [0, 1].
type number
opacityStop opacity in [alpha_floor, 1].
type number