ChartDirector Ver 3.0 (C++ Edition)

3D Angle


            

This example illustrates the effects of different 3D angles. ChartDirector allows the 3D depth and angles to be configued using PieChart.set3D and PieChart.set3D2.

This example also demonstrates how to disable sector labels by setting their colors to Transparent using PieChart.setLabelStyle.

Source Code Listing

[The following project is available in "cppdemo/threedanglepie".]
#include "chartdir.h" #include <stdio.h> void createChart(int img, const char *filename) { char buffer[256]; //the tilt angle of the pie int angle = img * 15; //The data for the pie chart double data[] = {25, 18, 15, 12, 8, 30, 35}; //Create a PieChart object of size 100 x 110 pixels PieChart *c = new PieChart(100, 110); //Set the center of the pie at (50, 55) and the radius to 38 pixels c->setPieSize(50, 55, 38); //Set the depth and tilt angle of the 3D pie (-1 means auto depth) c->set3D(-1, angle); //Add a title showing the tilt angle sprintf(buffer, "Tilt = %d deg", angle); c->addTitle(buffer, "arial.ttf", 8); //Set the pie data c->setData(DoubleArray(data, sizeof(data)/sizeof(*data))); //Disable the sector labels by setting the color to Transparent c->setLabelStyle("", 8, Transparent); //output the chart c->makeChart(filename); //free up resources delete c; } int main(int argc, char *argv[]) { createChart(0, "threedanglepie0.png"); createChart(1, "threedanglepie1.png"); createChart(2, "threedanglepie2.png"); createChart(3, "threedanglepie3.png"); createChart(4, "threedanglepie4.png"); createChart(5, "threedanglepie5.png"); createChart(6, "threedanglepie6.png"); return 0; }