68 lines
1.4 KiB
C++
68 lines
1.4 KiB
C++
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#pragma once
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#include <cmath>
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#include <iostream>
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#include <random>
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#define M_PI 3.14159265358979323846
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constexpr 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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{
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return std::max(lo, std::min(hi, v));
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}
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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)
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return false;
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else if (discr == 0)
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x0 = x1 = -0.5 * b / a;
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else
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{
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float q = (b > 0) ? -0.5 * (b + sqrt(discr)) : -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)
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std::swap(x0, x1);
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return true;
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}
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enum MaterialType
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{
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DIFFUSE_AND_GLOSSY,
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REFLECTION_AND_REFRACTION,
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REFLECTION
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};
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inline float get_random_float()
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{
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std::random_device dev;
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std::mt19937 rng(dev());
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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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{
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if (i < pos)
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std::cout << "=";
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else if (i == pos)
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std::cout << ">";
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else
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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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