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47 lines
1.2 KiB
47 lines
1.2 KiB
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#ifndef UNRAVELHEART3D_HPP
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#define UNRAVELHEART3D_HPP
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#include "../AttractorKernel.hpp"
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#include <cmath>
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class UnravelHeart3D : public AttractorKernel {
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public:
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UnravelHeart3D():
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AttractorKernel(3, 8) {}
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virtual std::string type() { return "unravel heart"; };
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virtual void operator()() {
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std::swap(vectorNew, vectorOld);
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vectorNew[0] = parameters[0]*(vectorOld[2] + parameters[1]);
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vectorNew[1] = parameters[2]*(vectorOld[0] + parameters[3]);
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vectorNew[2] = parameters[4]*(vectorOld[1] + parameters[5]);
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const double x = vectorNew[0];
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const double y = vectorNew[1];
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const double z = vectorNew[2];
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const double dist = x*x + y*y + 2.0*z*z - 1.0;//parameters[7];
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const double lh = dist*dist*dist;
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const double rh = parameters[6]*x*x*y*y*y;
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if(lh > rh) {
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const double sqrtDist = std::pow(std::abs(lh), 1.0/6.0);
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const double sqrtDist2 = std::pow(std::abs(rh), 1.0/6.0) * sign(parameters[6]);
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const double p = 1.0 - sqrtDist2 * (static_cast<int>(sqrtDist / sqrtDist2) + 1.0) / sqrtDist;
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vectorNew[0] *= p;
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vectorNew[1] *= -p;
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vectorNew[2] *= p;
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}
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}
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double sign(double x){
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return (x > 0) - (x < 0);
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}
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};
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#endif // UNRAVEL_HPP
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