<curve>
Attribute Examples
The following examples illustrate use of the <curve> tag attributes.
Attribute Example: draggable
If a <curve> has its draggable attribute set to false,
the user will not be able to manipulate the through points.
Attribute Example: labelPosition
The labelPosition attribute specifies the location of the
curve’s label. Valid values are upperleft, upperright, top,
left, right, lowerleft, bottom, lowerright.
The default value is upperright.
Attribute Example: flipFunction
The <curve> is defined with a function between the opening
and closing tags. The flipFunction attribute reflects the curve about the line .
Attribute Example: splineTension
Two curves are contrasted to demonstrate the effect of the splineTension
attribute on the shape of the curve. Valid values for the splineTension
attribute range from 0 (corresponding to the case where the spline is actually a polyline)
to 1 (for full curvature). The default value for splineTension is . For
greater control over the shape of the curve at the through points, the <bezierControls>
component can be used.
Attribute Example: extrapolateBackward, extrapolateForward
The extrapolateBackward and extrapolateForward attributes of
the <curve> component will add quadratic extrapolations
onto cubic splines. The extrapolation is based on the curvature of the
adjacent spline segment. The extrapolated parabola will open
either vertically or horizontally.
Attribute Example: splineForm
Two curves are contrasted to demonstrate the effect of
the splineForm attribute on the <curve> component.
The splineForm attribute accepts input values of “centripetal”
and “uniform”, with a default value of “centripetal”.
Attribute Example: variable
The variable attribute specifies the parameter used when defining a parametric <curve>.
Attribute Example: through
The through attribute defines through points for the <curve>
Attribute Example: parMin, parMax
The parMin and parMax attributes specify a minimum and maximum value for the parameter when graphing a parametric curve.
Attribute Example: Standard graphical attributes
The uses of the following standard graphical attributes are
illustrated: layer, styleNumber, applyStyleToLabel and labelIsName.