Shapes

Line, area, and arc path generators plus layout algorithms for data visualization. These functions produce SVG path strings and compute geometric layouts for charts.

Line and area generators

• linePath — Generate an SVG path for a line through points with curve interpolation.
• areaPath — Generate a closed area path from a line down to a baseline.
• areaPathStacked — Generate a closed area path between two lines for stacked area charts.

Arc generators

• arcPath — Generate an arc or annular sector SVG path for pie slices and donut segments.
• arcPathRounded — Generate an arc with natively rounded corners.

Layout algorithms

• pieLayout — Compute pie slice angles from an array of values.
• stackLayout — Compute stacked baselines from multiple data series.
• sankeyLayout — Compute a full Sankey diagram layout with positioned nodes and links.