



This example demonstrates the effects of various surface lighting parameters, configured using SurfaceChart.setLighting.
ChartDirector Ver 5.0 (C++ Edition)
Surface Lighting
Source Code Listing
#include "chartdir.h" #include <math.h> void createChart(int img, const char *filename) { // The x and y coordinates of the grid double dataX[] = {-10, -8, -6, -4, -2, 0, 2, 4, 6, 8, 10}; double dataY[] = {-10, -8, -6, -4, -2, 0, 2, 4, 6, 8, 10}; // The values at the grid points. In this example, we will compute the values // using the formula z = x * sin(y) + y * sin(x). 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] = x * sin(y) + y * sin(x); } } // Create a SurfaceChart object of size 380 x 400 pixels, with white (ffffff) // background and grey (888888) border. SurfaceChart *c = new SurfaceChart(380, 400, 0xffffff, 0x888888); // Demonstrate various lighting parameters if (img == 0) { c->addTitle( "Default Lighting<*br*><*size=10*>Ambient = 0.5, Diffuse = 0.5, " "Specular = 1, Shininess = 8"); } else if (img == 1) { c->addTitle( "Matte (Non-Glossy) Lighting<*br*><*size=10*>Ambient = 0.5, Diffuse = " "0.5, Specular = 0, Shininess = 0"); c->setLighting(0.5, 0.5, 0, 0); } else if (img == 2) { c->addTitle( "Flat Lighting<*br*><*size=10*>Ambient = 1, Diffuse = 0, Specular = 0, " "Shininess = 0"); c->setLighting(1, 0, 0, 0); } else { c->addTitle( "Strong Glossy Lighting<*br*><*size=10*>Ambient = 0.5, Diffuse = 0.5, " "Specular = 4, Shininess = 32"); c->setLighting(0.5, 0.5, 4, 32); } // Set the center of the plot region at (175, 200), and set width x depth x // height to 200 x 200 x 160 pixels c->setPlotRegion(175, 200, 200, 200, 160); // Set the plot region wall thichness to 5 pixels c->setWallThickness(5); // Set the elevation and rotation angles to 45 and 60 degrees c->setViewAngle(45, 60); // Set the perspective level to 35 c->setPerspective(35); // 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 50 x 50 grid for a smooth surface c->setInterpolation(50, 50); // Set contour lines to semi-transparent black (c0000000) c->setContourColor(0xc0000000); // Output the chart c->makeChart(filename); //free up resources } int main(int argc, char *argv[]) { createChart(0, "surfacelighting0.jpg"); createChart(1, "surfacelighting1.jpg"); createChart(2, "surfacelighting2.jpg"); createChart(3, "surfacelighting3.jpg"); return 0; } |