30 lines
849 B
C++
30 lines
849 B
C++
// Example of using the GeographicLib::SphericalHarmonic class
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#include <iostream>
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#include <exception>
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#include <vector>
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#include <GeographicLib/SphericalHarmonic.hpp>
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using namespace std;
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using namespace GeographicLib;
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int main() {
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try {
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int N = 3; // The maxium degree
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double ca[] = {10, 9, 8, 7, 6, 5, 4, 3, 2, 1}; // cosine coefficients
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vector<double> C(ca, ca + (N + 1) * (N + 2) / 2);
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double sa[] = {6, 5, 4, 3, 2, 1}; // sine coefficients
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vector<double> S(sa, sa + N * (N + 1) / 2);
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double a = 1;
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SphericalHarmonic h(C, S, N, a);
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double x = 2, y = 3, z = 1;
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double v, vx, vy, vz;
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v = h(x, y, z, vx, vy, vz);
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cout << v << " " << vx << " " << vy << " " << vz << "\n";
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}
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catch (const exception& e) {
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cerr << "Caught exception: " << e.what() << "\n";
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return 1;
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}
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}
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