85 lines
2.1 KiB
C++
85 lines
2.1 KiB
C++
#include "mandelbrot.h"
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#include "utils.h"
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#include <cstdint>
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#include <iostream>
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using namespace mpfr;
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Mandelbrotc::Mandelbrotc(Vec2mp const &f, Vec2mp const &t, Vec2i const &s, uint32_t mi)
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: f(f), t(t), s(s), max_iter(mi)
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{
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this->threads = std::vector<std::thread>();
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//this->screen = std::vector<std::vector<uint8_t>>();
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this->screen = new uint8_t*[s.x];
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for(int i = 0; i < s.x; ++i)
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this->screen[i] = new uint8_t[s.y];
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this->done = false;
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}
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void Mandelbrotc::start_threads(bool first)
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{
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if (!this->done && !first)
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return;
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Mandelbrotc const &m = *this;
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for (int i = 0; i < this->thread_count; i++) {
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std::thread t = std::thread(&Mandelbrotc::calc, this, i);
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this->threads.push_back(std::move(t));
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std::cout << "thread created" << std::endl;
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}
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this->done = false;
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}
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void Mandelbrotc::stop_threads()
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{
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for (int i = 0; i < this->thread_count; i++) {
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while (!this->threads[i].joinable())
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this->threads[i].join();
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}
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}
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void Mandelbrotc::calc(const uint8_t tid)
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{
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mpreal x, y;
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std::vector<uint8_t> v = std::vector<uint8_t>();
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for(double i = tid; i < this->s.x; i+=this->thread_count) {
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for(double j = 0; j < this->s.y; j++) {
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x = (mpfr::abs(this->f.x - this->t.x) * (i / this->s.x)) + this->f.x;
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y = (mpfr::abs(this->f.y - this->t.y) * (j / this->s.y)) + this->f.y;
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this->screen[(int)i][(int)j] = this->mandelbrot(Vec2mp(x, y));
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}
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}
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std::cout << "thread " << tid << " done" << std::endl;
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if (tid == thread_count-1)
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this->done = true;
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}
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uint32_t Mandelbrotc::mandelbrot(const Vec2mp &n)
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{
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uint32_t iter = 0;
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// BigFloat x = BigFloat(n.x.precision);
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// x.setValue(0.0);
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// BigFloat y = BigFloat(n.y.precision);
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// y.setValue(0.0);
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mpreal x = mpreal(0.0);
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mpreal xtemp = mpreal(0.0);
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mpreal y = mpreal(0.0);
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mpreal x2 = mpreal(0.0);
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mpreal y2 = mpreal(0.0);
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while (x*x + y*y <= 4 && iter < max_iter) {
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xtemp = x*x - y*y + n.x;
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y = 2*x*y+n.y;
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x = xtemp;
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iter++;
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}
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return iter;
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}
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