| BezierWidth | Specify the width of a variable-width line | 
| brushXsplineGrob | Sweep an X-spline curve with a brush. | 
| circleBrush | Sweep an X-spline curve with a brush. | 
| edgePoints | Calculate edge points | 
| edgePoints.brushXsplineGrob | Calculate edge points | 
| edgePoints.offsetXsplineGrob | Calculate edge points | 
| edgePoints.vwcurveGrob | Calculate edge points | 
| edgePoints.vwlineGrob | Calculate edge points | 
| edgePoints.vwXsplineGrob | Calculate edge points | 
| grid.brushXspline | Sweep an X-spline curve with a brush. | 
| grid.offsetBezier | Draw a Bezier Offset Curve. | 
| grid.offsetXspline | Draw an X-spline offset curve. | 
| grid.vwcurve | Draw a variable-width smooth curve. | 
| grid.vwline | Draw a variable-width set of line segments. | 
| grid.vwXspline | Draw a variable-width X-spline. | 
| offsetBezierGrob | Draw a Bezier Offset Curve. | 
| offsetXsplineGrob | Draw an X-spline offset curve. | 
| outline | Calculate outline | 
| outline.offsetBezierGrob | Calculate outline | 
| outline.offsetXsplineGrob | Calculate outline | 
| outline.vwlineGrob | Calculate outline | 
| squareBrush | Sweep an X-spline curve with a brush. | 
| verticalBrush | Sweep an X-spline curve with a brush. | 
| vwcurveGrob | Draw a variable-width smooth curve. | 
| vwlineGrob | Draw a variable-width set of line segments. | 
| vwPath | Functions to render variable-width line | 
| vwPolygon | Functions to render variable-width line | 
| vwXsplineGrob | Draw a variable-width X-spline. | 
| widthSpec | Specify the width of a variable-width line | 
| widthSpline | Specify the width of a variable-width line |