ChartDirector 7.1 (C++ Edition)
ContourLayer
.
getZAtValue
Usage
double getZAtValue(double x, double y);
Description
Gets the z value at the specify (x, y) data values.
Note:
This method should be used only after ChartDirector has output the chart image, or after
BaseChart.layout
has been called.
Arguments
Argument
Default
Description
x
(Mandatory)
The x data value.
y
(Mandatory)
The y data value.
Return Value
The z value at the sepcified (x, y) data coordinate, or
NoValue
if the point lie outside the contour region.
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