ChartDirector 6.0 (C++ Edition)

3D Scatter Axis Types

This example demonstrates different axis scale types for the 3D scatter charts. It also demonstrates using different symbol shapes.

Like an XYChart, in a ThreeDScatterChart, the axis scale can represent numbers, date/time or labels. In this example, the x-axis uses a date/time scale, the y-axis uses a label based scale, and the z-axis uses a numeric scale.

Source Code Listing

[The following code is available in "cppdemo/threedscatteraxis". A MFC version of the code is available in "mfcdemo/mfcdemo" (Windows edition only). A QT version of the code is available in "qtdemo/qtdemo".]
 ```#include "chartdir.h" int main(int argc, char *argv[]) { // The x coordinates for the 2 scatter groups double dataX[] = {Chart::chartTime(2011, 9, 1), Chart::chartTime(2011, 9, 2), Chart::chartTime( 2011, 9, 3), Chart::chartTime(2011, 9, 4), Chart::chartTime(2011, 9, 5), Chart::chartTime( 2011, 9, 6), Chart::chartTime(2011, 9, 7), Chart::chartTime(2011, 9, 8), Chart::chartTime( 2011, 9, 9), Chart::chartTime(2011, 9, 10), Chart::chartTime(2011, 9, 11)}; // The y and z coordinates for the first scatter group double dataY0[] = {0.4, 0.2, 0.5, 0.4, 0.7, 1.3, 1.1, 1.0, 0.6, 0.4, 0.5}; double dataZ0[] = {43, 38, 33, 23.4, 28, 36, 34, 47, 53, 45, 40}; // The y and z coordinates for the second scatter group double dataY1[] = {1.4, 1.0, 1.8, 1.9, 1.5, 1.0, 0.6, 0.7, 1.2, 1.7, 1.5}; double dataZ1[] = {46, 41, 33, 37, 28, 29, 34, 37, 41, 52, 50}; // Instead of displaying numeric values, labels are used for the y-axis const char *labelsY[] = {"Low", "Medium", "High"}; // Create a ThreeDScatterChart object of size 760 x 520 pixels ThreeDScatterChart *c = new ThreeDScatterChart(760, 520); // Add a title to the chart using 18 points Arial font c->addTitle("3D Scatter Chart Axis Types", "arial.ttf", 18); // Set the center of the plot region at (385, 270), and set width x depth x height to 480 x 240 // x 240 pixels c->setPlotRegion(385, 270, 480, 240, 240); // Set the elevation and rotation angles to 30 and -10 degrees c->setViewAngle(30, -10); // Add a legend box at (380, 40) with horizontal layout. Use 9pt Arial Bold font. LegendBox *b = c->addLegend(380, 40, false, "arialbd.ttf", 9); b->setAlignment(Chart::TopCenter); b->setRoundedCorners(); // Add a scatter group to the chart using 13 pixels red (ff0000) glass sphere symbols, with // dotted drop lines ThreeDScatterGroup *g0 = c->addScatterGroup(DoubleArray(dataX, (int)(sizeof(dataX) / sizeof( dataX[0]))), DoubleArray(dataY0, (int)(sizeof(dataY0) / sizeof(dataY0[0]))), DoubleArray( dataZ0, (int)(sizeof(dataZ0) / sizeof(dataZ0[0]))), "Alpha Series", Chart::GlassSphere2Shape, 13, 0xff0000); g0->setDropLine(c->dashLineColor(Chart::SameAsMainColor, Chart::DotLine)); // Add a scatter group to the chart using 13 pixels blue (00cc00) cross symbols, with dotted // drop lines ThreeDScatterGroup *g1 = c->addScatterGroup(DoubleArray(dataX, (int)(sizeof(dataX) / sizeof( dataX[0]))), DoubleArray(dataY1, (int)(sizeof(dataY1) / sizeof(dataY1[0]))), DoubleArray( dataZ1, (int)(sizeof(dataZ1) / sizeof(dataZ1[0]))), "Beta Series", Chart::Cross2Shape(), 13, 0x00cc00); g1->setDropLine(c->dashLineColor(Chart::SameAsMainColor, Chart::DotLine)); // Set x-axis tick density to 50 pixels. ChartDirector auto-scaling will use this as the // guideline when putting ticks on the x-axis. c->xAxis()->setTickDensity(50); // Set the y-axis labels c->yAxis()->setLabels(StringArray(labelsY, (int)(sizeof(labelsY) / sizeof(labelsY[0])))); // Set label style to Arial bold for all axes c->xAxis()->setLabelStyle("arialbd.ttf"); c->yAxis()->setLabelStyle("arialbd.ttf"); c->zAxis()->setLabelStyle("arialbd.ttf"); // Set the x, y and z axis titles using deep blue (000088) 15 points Arial font c->xAxis()->setTitle("Date/Time Axis", "ariali.ttf", 15, 0x000088); c->yAxis()->setTitle("Label\nBased\nAxis", "ariali.ttf", 15, 0x000088); c->zAxis()->setTitle("Numeric Axis", "ariali.ttf", 15, 0x000088); // Output the chart c->makeChart("threedscatteraxis.png"); //free up resources delete c; return 0; }```