45 lines
816 B
C++
45 lines
816 B
C++
#ifndef LLMR_UTIL_MATH
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#define LLMR_UTIL_MATH
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#include <cmath>
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#include "vec.hpp"
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namespace llmr {
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namespace util {
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template <typename T>
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inline T max(T a, T b) {
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return b > a ? b : a;
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}
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template <typename T>
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inline T min(T a, T b) {
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return b < a ? b : a;
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}
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inline double angle_between(double ax, double ay, double bx, double by) {
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return atan2((ax * by - ay * bx), ax * bx + ay * by);
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}
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template <typename T, typename S1, typename S2>
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inline vec2<T> normal(const S1& a, const S2& b) {
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T dx = b.x - a.x;
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T dy = b.y - a.y;
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T c = sqrt(dx * dx + dy * dy);
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return { dx / c, dy / c };
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}
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template <typename T, typename S1, typename S2>
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inline T dist(const S1& a, const S2& b) {
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T dx = b.x - a.x;
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T dy = b.y - a.y;
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T c = sqrt(dx * dx + dy * dy);
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return c;
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}
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}
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}
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#endif
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