54 lines
1.3 KiB
C++
54 lines
1.3 KiB
C++
#pragma once
|
|
#include <iostream>
|
|
#include <cmath>
|
|
#include <random>
|
|
|
|
#undef M_PI
|
|
#define M_PI 3.141592653589793f
|
|
|
|
extern const float EPSILON;
|
|
const float kInfinity = std::numeric_limits<float>::max();
|
|
|
|
inline float clamp(const float &lo, const float &hi, const float &v)
|
|
{ return std::max(lo, std::min(hi, v)); }
|
|
|
|
inline bool solveQuadratic(const float &a, const float &b, const float &c, float &x0, float &x1)
|
|
{
|
|
float discr = b * b - 4 * a * c;
|
|
if (discr < 0) return false;
|
|
else if (discr == 0) x0 = x1 = - 0.5 * b / a;
|
|
else {
|
|
float q = (b > 0) ?
|
|
-0.5 * (b + sqrt(discr)) :
|
|
-0.5 * (b - sqrt(discr));
|
|
x0 = q / a;
|
|
x1 = c / q;
|
|
}
|
|
if (x0 > x1) std::swap(x0, x1);
|
|
return true;
|
|
}
|
|
|
|
inline float get_random_float()
|
|
{
|
|
static std::random_device dev;
|
|
static std::mt19937 rng(dev());
|
|
static std::uniform_real_distribution<float> dist(0.f, 1.f); // distribution in range [1, 6]
|
|
|
|
return dist(rng);
|
|
}
|
|
|
|
inline void UpdateProgress(float progress)
|
|
{
|
|
int barWidth = 70;
|
|
|
|
std::cout << "[";
|
|
int pos = barWidth * progress;
|
|
for (int i = 0; i < barWidth; ++i) {
|
|
if (i < pos) std::cout << "=";
|
|
else if (i == pos) std::cout << ">";
|
|
else std::cout << " ";
|
|
}
|
|
std::cout << "] " << int(progress * 100.0) << " %\r";
|
|
std::cout.flush();
|
|
};
|