ChartDirector 7.1 (C++ Edition)
ContourLayer
.
getZAtPixel
Usage
double getZAtPixel(int x, int y);
Description
Gets the z value at the specify (x, y) pixel coordinate.
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 pixel coordinate.
y
(Mandatory)
The y pixel coordinate.
Return Value
The z value at the sepcified (x, y) pixel coordinate, or
NoValue
if the point lie outside the contour region.
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