





This example demonstrates the effects of various perspective depth, configured using ThreeDChart.setPerspective.
ChartDirector 5.1 (C++ Edition)
Surface Perspective
Source Code Listing
#include "chartdir.h" #include <stdio.h> #include <math.h> void createChart(int img, const char *filename) { char buffer[256]; // The x and y coordinates of the grid double dataX[] = {0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0}; double dataY[] = {0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0}; // The values at the grid points. In this example, we will compute the values // using the formula z = sin((x - 0.5) * 2 * pi) * sin((y - 0.5) * 2 * pi) double dataZ[(int)(sizeof(dataX) / sizeof(dataX[0])) * (int)(sizeof(dataY) / sizeof(dataY[0]))]; int yIndex; for(yIndex = 0; yIndex < (int)(sizeof(dataY) / sizeof(dataY[0])); ++yIndex) { double y = (dataY[yIndex] - 0.5) * 2 * 3.1416; int xIndex; for(xIndex = 0; xIndex < (int)(sizeof(dataX) / sizeof(dataX[0])); ++xIndex) { double x = (dataX[xIndex] - 0.5) * 2 * 3.1416; dataZ[yIndex * (int)(sizeof(dataX) / sizeof(dataX[0])) + xIndex] = sin(x) * sin(y); } } // the perspective level int perspective = img * 12; // Create a SurfaceChart object of size 360 x 360 pixels, with white (ffffff) // background and grey (888888) border. SurfaceChart *c = new SurfaceChart(360, 360, 0xffffff, 0x888888); // Set the perspective level c->setPerspective(perspective); sprintf(buffer, "Perspective = %d", perspective); c->addTitle(buffer); // Set the center of the plot region at (195, 165), and set width x depth x // height to 200 x 200 x 150 pixels c->setPlotRegion(195, 165, 200, 200, 150); // Set the plot region wall thichness to 5 pixels c->setWallThickness(5); // Set the elevation and rotation angles to 30 and 30 degrees c->setViewAngle(30, 30); // Set the data to use to plot the chart c->setData(DoubleArray(dataX, (int)(sizeof(dataX) / sizeof(dataX[0]))), DoubleArray(dataY, (int)(sizeof(dataY) / sizeof(dataY[0]))), DoubleArray( dataZ, (int)(sizeof(dataZ) / sizeof(dataZ[0])))); // Spline interpolate data to a 40 x 40 grid for a smooth surface c->setInterpolation(40, 40); // Use smooth gradient coloring. c->colorAxis()->setColorGradient(); // Output the chart c->makeChart(filename); //free up resources delete c; } int main(int argc, char *argv[]) { createChart(0, "surfaceperspective0.jpg"); createChart(1, "surfaceperspective1.jpg"); createChart(2, "surfaceperspective2.jpg"); createChart(3, "surfaceperspective3.jpg"); createChart(4, "surfaceperspective4.jpg"); createChart(5, "surfaceperspective5.jpg"); return 0; } |