#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[(int)(sizeof(dataX) / sizeof(dataX[0])) * (int)(sizeof(dataY) / sizeof(dataY[0]))];
for(int yIndex = 0; yIndex < (int)(sizeof(dataY) / sizeof(dataY[0])); ++yIndex) {
double y = dataY[yIndex];
for(int xIndex = 0; xIndex < (int)(sizeof(dataX) / sizeof(dataX[0])); ++xIndex) {
double x = dataX[xIndex];
dataZ[yIndex * (int)(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, (int)(sizeof(dataX) / sizeof(dataX[0
]))), DoubleArray(dataY, (int)(sizeof(dataY) / sizeof(dataY[0]))), DoubleArray(dataZ, (int)(
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;
} |