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