#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 = Sin(x * x / 128 - y * y / 256 + 3) * Cos(x / 4 + 1 -
// Exp(y / 8))
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] = sin(x * x /
128.0 - y * y / 256.0 + 3) * cos(x / 4.0 + 1 - exp(y / 8.0));
}
}
// Create a SurfaceChart object of size 750 x 600 pixels
SurfaceChart *c = new SurfaceChart(750, 600);
// Add a title to the chart using 20 points Times New Roman Italic font
c->addTitle("Surface Energy Density ", "timesi.ttf", 20);
// Set the center of the plot region at (380, 260), and set width x depth x
// height to 360 x 360 x 270 pixels
c->setPlotRegion(380, 260, 360, 360, 270);
// Set the elevation and rotation angles to 30 and 210 degrees
c->setViewAngle(30, 210);
// Set the perspective level to 60
c->setPerspective(60);
// Set the data to use to plot the chart
c->setData(DoubleArray(dataX, sizeof(dataX)/sizeof(dataX[0])), DoubleArray(dataY,
sizeof(dataY)/sizeof(dataY[0])), DoubleArray(dataZ,
sizeof(dataZ)/sizeof(dataZ[0])));
// Spline interpolate data to a 80 x 80 grid for a smooth surface
c->setInterpolation(80, 80);
// Use semi-transparent black (c0000000) for x and y major surface grid lines.
// Use dotted style for x and y minor surface grid lines.
int majorGridColor = 0xc0000000;
int minorGridColor = c->dashLineColor(majorGridColor, Chart::DotLine);
c->setSurfaceAxisGrid(majorGridColor, majorGridColor, minorGridColor,
minorGridColor);
// Set contour lines to semi-transparent white (80ffffff)
c->setContourColor(0x80ffffff);
// Add a color axis (the legend) in which the left center is anchored at (665,
// 280). Set the length to 200 pixels and the labels on the right side.
c->setColorAxis(665, 280, Chart::Left, 200, Chart::Right);
// Set the x, y and z axis titles using 12 points Arial Bold font
c->xAxis()->setTitle("X Title\nPlaceholder", "arialbd.ttf", 12);
c->yAxis()->setTitle("Y Title\nPlaceholder", "arialbd.ttf", 12);
c->zAxis()->setTitle("Z Title Placeholder", "arialbd.ttf", 12);
// Output the chart
c->makeChart("surface3.jpg");
//free up resources
return 0;
} |