| r | Rectangle determining the size of the graph. |
| eval | Normalized x-position in the range [0; 1] at which the min- and max-curves should be evaluated. The returned minValue and maxValue values are expected to be in the range [-1; 1] and a value of 0 corresponds to the vertical center of the rectangle that is drawn into. Values outside of this range will be clamped. |
Fills the area between the two curves evaluated by the AudioMinMaxCurveAndColorEvaluator provided with smooth gradients along the edges.
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