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Permutation matrices research.
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889#include "fractal.hpp"#include <cmath>#include <array>#include "prelude.hpp"
fn distance_sq(Size x1, Size y1, Size x2, Size y2) -> F64 { let rise = y2 - y1; let run = x2 - x1; return rise * rise + run * run;}
fn distance(Size x1, Size y1, Size x2, Size y2) -> F64 { return sqrt(distance_sq(x1, y1, x2, y2));}
RGB::RGB(U8 red, U8 green, U8 blue) : Red(red) , Green(green), Blue(blue){}
fn RGB::to_hsv() const -> Color { let r = Red / 255.0; let g = Green / 255.0; let b = Blue / 255.0; let x_max = std::max(r, std::max(g, b)); let v = x_max; let x_min = std::min(r, std::min(g, b)); let c = x_max - x_min; let l = v - c / 2.0; let h = v == r ? 60.0 * (I64((g - b) / c) % 6) : v == g ? 60.0 * ((b - r) / c + 2) : v == b ? 60.0 * ((r - g) / c + 4) : 0.0; let s = v == 0 ? 0.0 : c / v;
return Color(h, s, v);}
Color::Color() : hue(0.0), saturation(0.0), value(0.0){}
Color::Color(F64 hue, F64 saturation, F64 value) : hue(hue) , saturation(saturation), value(value){}
Color::Color(U32 val) : hue(0.0), saturation(0.0){ value = (double) val / 255.0;}
fn Color::to_rgb() const -> RGB { let chroma = saturation * value; let cube_hue = hue / 60.0; let tmp = chroma * (1.0 - fabs(fmod(cube_hue, 2.0) - 1.0));
var components = std::array{ 0.0, 0.0, 0.0 }; if (cube_hue < 1.0) components = { chroma, tmp, 0.0 }; else if (cube_hue < 2.0) components = { tmp, chroma, 0.0 }; else if(cube_hue < 3.0) components = { 0.0, chroma, tmp }; else if(cube_hue < 4.0) components = { 0.0, tmp, chroma }; else if(cube_hue < 5.0) components = { tmp, 0.0, chroma }; else components = { chroma, 0.0, tmp };
let match = value - chroma; for (var& component : components) component += match, component *= 255;
const auto c = RGB(round(components[0]), round(components[1]), round(components[2])); return c;}
fn Color::lerp(Ref<const Color> rhs, double t) const -> Color{ return Color(std::lerp(hue, rhs.hue, t), std::lerp(saturation, rhs.saturation, t), std::lerp(value, rhs.value, t));}
Point::Point(F64 x, F64 y) : x(x), y(y){}