#include "chartdir.h"
void createChart(int chartIndex, const char *filename)
{
// The x and y coordinates of the grid
double dataX[] = {-4, -3, -2, -1, 0, 1, 2, 3, 4};
const int dataX_size = (int)(sizeof(dataX)/sizeof(*dataX));
double dataY[] = {-4, -3, -2, -1, 0, 1, 2, 3, 4};
const int dataY_size = (int)(sizeof(dataY)/sizeof(*dataY));
// Use random numbers for the z values on the XY grid
RanSeries* r = new RanSeries(99);
DoubleArray dataZ = r->get2DSeries(dataX_size, dataY_size, -0.9, 0.9);
// Create a SurfaceChart object of size 460 x 460 pixels with white (0xffffff) background and
// grey (0x888888) border
SurfaceChart* c = new SurfaceChart(460, 460, 0xffffff, 0x888888);
// Set the surface data
c->setData(DoubleArray(dataX, dataX_size), DoubleArray(dataY, dataY_size), dataZ);
// Add a color axis (the legend) in at the top center of the chart, with labels at the bottom.
// Set the axis to flat style.
ColorAxis* cAxis = c->setColorAxis(c->getWidth() / 2, 15, Chart::Top, 250, Chart::Bottom);
cAxis->setTitle("Color Axis");
cAxis->setAxisBorder(Chart::Transparent, 0);
// By default, the color axis is synchronized with the z-axis. The following code remove the
// synchronization so that the color axis will auto-scale independently. Set the auto-scale
// minimum tick spacing to 20 pixels.
cAxis->syncAxis(0);
cAxis->setTickDensity(20);
if (chartIndex == 1) {
// Speicify a color gradient as a list of colors, and use it in the color axis.
int colorGradient[] = {0x0044cc, 0xffffff, 0x00aa00};
const int colorGradient_size = (int)(sizeof(colorGradient)/sizeof(*colorGradient));
cAxis->setColorGradient(false, IntArray(colorGradient, colorGradient_size));
} else if (chartIndex == 2) {
// Specify the color scale to use in the color axis
double colorScale[] = {-1.0, 0x1a9850, -0.75, 0x66bd63, -0.5, 0xa6d96a, -0.25, 0xd9ef8b, 0,
0xfee08b, 0.25, 0xfdae61, 0.5, 0xf46d43, 0.75, 0xd73027, 1};
const int colorScale_size = (int)(sizeof(colorScale)/sizeof(*colorScale));
cAxis->setColorScale(DoubleArray(colorScale, colorScale_size));
} else if (chartIndex == 3) {
// Specify the color scale to use in the color axis. Also specify an underflow color
// 0x66ccff (blue) for regions that fall below the lower axis limit.
double colorScale[] = {0, 0xffff99, 0.2, 0x80cdc1, 0.4, 0x35978f, 0.6, 0x01665e, 0.8,
0x003c30, 1};
const int colorScale_size = (int)(sizeof(colorScale)/sizeof(*colorScale));
cAxis->setColorScale(DoubleArray(colorScale, colorScale_size), 0x66ccff);
}
// Set the center of the plot region at (230, 250), and set width x depth x height to 240 x 240
// x 170 pixels
c->setPlotRegion(230, 250, 240, 240, 170);
// Set the plot region wall thichness to 3 pixels
c->setWallThickness(3);
// Set the elevation and rotation angles to 45 degrees
c->setViewAngle(45, 45);
// Set the perspective level to 20
c->setPerspective(20);
// Spline interpolate data to a 50 x 50 grid for a smooth surface
c->setInterpolation(50, 50);
// Set the axis title
c->xAxis()->setTitle("X-Axis", "arialbd.ttf", 10);
c->yAxis()->setTitle("Y-Axis", "arialbd.ttf", 10);
c->zAxis()->setTitle("Z Axis", "arialbd.ttf", 10);
// Output the chart
c->makeChart(filename);
//free up resources
delete r;
delete c;
}
int main(int argc, char *argv[])
{
createChart(0, "surfacecolor0.png");
createChart(1, "surfacecolor1.png");
createChart(2, "surfacecolor2.png");
createChart(3, "surfacecolor3.png");
return 0;
} |