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Andrea Bontempi 2018-02-21 10:24:23 +01:00
parent 2fd5cb5d36
commit 936f7a9d29
4 changed files with 30 additions and 28 deletions
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20
Fractal.cpp
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@ -3,7 +3,7 @@
#include <cmath> #include <cmath>
#include <iostream> #include <iostream>
Fractal::Fractal(int image_width, int image_height, Domain domain, std::function<std::complex<double> (std::complex<double>, std::complex<double>)> fractal_function, std::function<sf::Color(int iteration_number, int max_iterations)> render_function) : domain(domain) { Fractal::Fractal(int image_width, int image_height, Domain domain, std::function<int (std::complex<double>, int)> fractal_function, std::function<sf::Color(int, int)> render_function) : domain(domain) {
this->fractal_function = fractal_function; this->fractal_function = fractal_function;
this->render_function = render_function; this->render_function = render_function;
this->image_height = image_height; this->image_height = image_height;
@ -12,7 +12,7 @@ Fractal::Fractal(int image_width, int image_height, Domain domain, std::function
this->hasChanged = true; this->hasChanged = true;
} }
void Fractal::setFractalFunction(std::function<std::complex<double> (std::complex<double>, std::complex<double>)> fractal_function) { void Fractal::setFractalFunction(std::function<int (std::complex<double>, int)> fractal_function) {
this->fractal_function = fractal_function; this->fractal_function = fractal_function;
this->hasChanged = true; this->hasChanged = true;
} }
@ -22,20 +22,6 @@ void Fractal::setRenderFunction(std::function<sf::Color (int iteration_number, i
this->hasChanged = true; this->hasChanged = true;
} }
int Fractal::compute_point(std::complex<double> point, int max_iterations) {
std::complex<double> z(0);
int iter = 0;
while (abs(z) < 2.0 && iter < max_iterations) {
z = this->fractal_function(z, point);
iter++;
}
return iter;
}
std::complex<double> Fractal::scale_point(std::complex<double> point) { std::complex<double> Fractal::scale_point(std::complex<double> point) {
std::complex<double> aux(point.real() / (double)this->image_width * this->domain.width() + this->domain.x_min, point.imag() / (double)this->image_height * this->domain.height() + domain.y_min); std::complex<double> aux(point.real() / (double)this->image_width * this->domain.width() + this->domain.x_min, point.imag() / (double)this->image_height * this->domain.height() + domain.y_min);
return aux; return aux;
@ -54,7 +40,7 @@ sf::Image Fractal::getFrame(){
for(int x = 0; x < this->image_width; x++) { for(int x = 0; x < this->image_width; x++) {
std::complex<double> point(x, y); std::complex<double> point(x, y);
point = scale_point(point); point = scale_point(point);
int iterations = compute_point(point, max_iterations); int iterations = this->fractal_function(point, max_iterations);
sf::Color color = this->render_function(iterations, max_iterations); sf::Color color = this->render_function(iterations, max_iterations);
this->frame.setPixel(x, y, color); this->frame.setPixel(x, y, color);
} }

13
Fractal.hpp
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@ -83,14 +83,13 @@ class Fractal {
private: private:
int image_width, image_height; int image_width, image_height;
std::function<std::complex<double>(std::complex<double>, std::complex<double>)> fractal_function; std::function<int (std::complex<double>, int)> fractal_function;
std::function<sf::Color(int iteration_number, int max_iterations)> render_function; std::function<sf::Color(int, int)> render_function;
sf::Image frame; sf::Image frame;
bool hasChanged; bool hasChanged;
Domain domain; Domain domain;
std::complex<double> scale_point(std::complex<double> point); std::complex<double> scale_point(std::complex<double> point);
int compute_point(std::complex<double> point, int max_iterations);
int compute_max_iterations(int window_width, double domain_width); int compute_max_iterations(int window_width, double domain_width);
public: public:
@ -98,13 +97,13 @@ public:
Fractal(int image_width, Fractal(int image_width,
int image_height, int image_height,
Domain domain, Domain domain,
std::function<std::complex<double>(std::complex<double>, std::complex<double>)> fractal_function = fractal_mandelbrot, std::function<int (std::complex<double>, int)> fractal_function = fractal_function_template<fractal_mandelbrot>,
std::function<sf::Color(int iteration_number, int max_iterations)> render_function = render_smooth std::function<sf::Color(int, int)> render_function = render_smooth
); );
void setFractalFunction(std::function<std::complex<double>(std::complex<double>, std::complex<double>)> fractal_function); void setFractalFunction(std::function<int (std::complex<double>, int)> fractal_function);
void setRenderFunction(std::function<sf::Color(int iteration_number, int max_iterations)> render_function); void setRenderFunction(std::function<sf::Color(int, int)> render_function);
void moveTo(int x, int y); void moveTo(int x, int y);

17
functions.hpp
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@ -4,6 +4,23 @@
#include <complex> #include <complex>
#include <SFML/Graphics.hpp> #include <SFML/Graphics.hpp>
typedef std::complex<double> (*fractal_function)(std::complex<double>, std::complex<double>);
template <fractal_function F>
int fractal_function_template(std::complex<double> point, int max_iterations) {
std::complex<double> z(0);
int iter = 0;
while (abs(z) < 2.0 && iter < max_iterations) {
z = F(z, point);
iter++;
}
return iter;
}
inline std::complex<double> fractal_mandelbrot(std::complex<double> z, std::complex<double> c) { inline std::complex<double> fractal_mandelbrot(std::complex<double> z, std::complex<double> c) {
return (z * z) + c; return (z * z) + c;
} }

8
main.cpp
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@ -192,22 +192,22 @@ int main(int argc, char **argv) {
// Fractal selection // Fractal selection
case sf::Keyboard::Key::Num1: case sf::Keyboard::Key::Num1:
std::cerr << "Selected mandelbrot algorithm" << std::endl; std::cerr << "Selected mandelbrot algorithm" << std::endl;
mandelbrot.setFractalFunction(fractal_mandelbrot); mandelbrot.setFractalFunction(fractal_function_template<fractal_mandelbrot>);
break; break;
case sf::Keyboard::Key::Num2: case sf::Keyboard::Key::Num2:
std::cerr << "Selected triple mandelbrot algorithm" << std::endl; std::cerr << "Selected triple mandelbrot algorithm" << std::endl;
mandelbrot.setFractalFunction(fractal_triple_mandelbrot); mandelbrot.setFractalFunction(fractal_function_template<fractal_triple_mandelbrot>);
break; break;
case sf::Keyboard::Key::Num3: case sf::Keyboard::Key::Num3:
std::cerr << "Selected quadruple mandelbrot algorithm" << std::endl; std::cerr << "Selected quadruple mandelbrot algorithm" << std::endl;
mandelbrot.setFractalFunction(fractal_quadruple_mandelbrot); mandelbrot.setFractalFunction(fractal_function_template<fractal_quadruple_mandelbrot>);
break; break;
case sf::Keyboard::Key::Num4: case sf::Keyboard::Key::Num4:
std::cerr << "Selected quintuple mandelbrot algorithm" << std::endl; std::cerr << "Selected quintuple mandelbrot algorithm" << std::endl;
mandelbrot.setFractalFunction(fractal_quintuple_mandelbrot); mandelbrot.setFractalFunction(fractal_function_template<fractal_quintuple_mandelbrot>);
break; break;
default: default: