#include "chartdir.h"
#include <math.h>
int main(int argc, char *argv[])
{
// The x and y coordinates of the grid
double dataX[] = {-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6,
7, 8, 9, 10};
double dataY[] = {-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6,
7, 8, 9, 10};
// The values at the grid points. In this example, we will compute the values
// using the formula z = x * sin(y) + y * sin(x).
double dataZ[(sizeof(dataX) / sizeof(dataX[0])) * (sizeof(dataY) / sizeof(dataY[0
]))];
int yIndex;
for(yIndex = 0; yIndex < sizeof(dataY) / sizeof(dataY[0]); ++yIndex) {
double y = dataY[yIndex];
int xIndex;
for(xIndex = 0; xIndex < sizeof(dataX) / sizeof(dataX[0]); ++xIndex) {
double x = dataX[xIndex];
dataZ[yIndex * (sizeof(dataX) / sizeof(dataX[0])) + xIndex] = x * sin(y)
+ y * sin(x);
}
}
// Create a XYChart object of size 600 x 500 pixels
XYChart *c = new XYChart(600, 500);
// Add a title to the chart using 15 points Arial Bold Italic font
c->addTitle("z = x * sin(y) + y * sin(x) ", "arialbi.ttf", 15);
// Set the plotarea at (75, 40) and of size 400 x 400 pixels. Use
// semi-transparent black (80000000) dotted lines for both horizontal and
// vertical grid lines
c->setPlotArea(75, 40, 400, 400, -1, -1, -1, c->dashLineColor(0x80000000,
Chart::DotLine), -1);
// Set x-axis and y-axis title using 12 points Arial Bold Italic font
c->xAxis()->setTitle("X-Axis Title Place Holder", "arialbi.ttf", 12);
c->yAxis()->setTitle("Y-Axis Title Place Holder", "arialbi.ttf", 12);
// Set x-axis and y-axis labels to use Arial Bold font
c->xAxis()->setLabelStyle("arialbd.ttf");
c->yAxis()->setLabelStyle("arialbd.ttf");
// When auto-scaling, use tick spacing of 40 pixels as a guideline
c->yAxis()->setTickDensity(40);
c->xAxis()->setTickDensity(40);
// Add a contour layer using the given data
ContourLayer *layer = c->addContourLayer(DoubleArray(dataX,
sizeof(dataX)/sizeof(dataX[0])), DoubleArray(dataY,
sizeof(dataY)/sizeof(dataY[0])), DoubleArray(dataZ,
sizeof(dataZ)/sizeof(dataZ[0])));
// Move the grid lines in front of the contour layer
c->getPlotArea()->moveGridBefore(layer);
// Add a color axis (the legend) in which the top left corner is anchored at
// (505, 40). Set the length to 400 pixels and the labels on the right side.
ColorAxis *cAxis = layer->setColorAxis(505, 40, Chart::TopLeft, 400, Chart::Right
);
// Add a title to the color axis using 12 points Arial Bold Italic font
cAxis->setTitle("Color Legend Title Place Holder", "arialbi.ttf", 12);
// Set color axis labels to use Arial Bold font
cAxis->setLabelStyle("arialbd.ttf");
// Output the chart
c->makeChart("contour.png");
//free up resources
delete c;
return 0;
} |