viseq/src/vmath.h

#pragma once

#include "raylib.h"
#include <cmath>

#include "nlohmann/json.hpp"

using json = nlohmann::json;

namespace VISEQ::VMATH{

	template<typename T>
	class Vec2D{
		public:
		
			Vec2D() {};
			Vec2D(T x, T y) : x(x), y(y) {}
			T x = 0;
			T y = 0;
			T dist(Vec2D* v) { return sqrt(pow((v->x - x), 2) + pow((v->y - y), 2));};
			T dist(Vec2D v) { return sqrt(pow((v.x - x), 2) + pow((v.y - y), 2));};

			T length() { return (T)sqrt(pow(x, 2) + pow(y, 2));};

			T angle(Vec2D v){
				T angle = atan2(v.y, v.x) - atan2(y,x);
				if(angle > M_PI) angle -= M_PI_2;
				if(angle < -M_PI) angle += M_PI_2;
				return angle;
				//return acos(dot(v));
			};

			T angleDeg(Vec2D v){
				return angle(v) * 180 / M_PI;
			};
			
			T dot(Vec2D &v){
				return (x*v.x) + (y*v.y);
			};
			
			T dot(Vec2D v){
				return (x*v.x) + (y*v.y);
			};

			operator Vector2() const {
				return (Vector2){x,y};
			}

			Vec2D orth(Vec2D &v){
				return Vec2D(-v.y, v.x);
			};
			
			Vec2D orth(){
				return Vec2D(-y, x);
			};
			
			Vec2D norm() { return *this / length();};

			Vec2D center(Vec2D v){
				return Vec2D<T>{x,y} - (Vec2D<T>{x,y} - v)*0.5f;
			}

			Vec2D& operator=(const Vec2D& vec){
				if (this == &vec){
					return *this;
				}
				x = vec.x;
				y = vec.y;
				return *this;
			};
			
			Vec2D& operator+=(const Vec2D& vec){
				this->x += vec.x;
				this->y += vec.y;
				return *this;
			};
			
			Vec2D& operator-=(const Vec2D& vec){
				this->x -= vec.x;
				this->y -= vec.y;
				return *this;
			};
			
			Vec2D& operator*=(const Vec2D& vec){
				this->x *= vec.x;
				this->y *= vec.y;
				return *this;
			};
			
			Vec2D& operator/=(const Vec2D& vec){
				this->x /= vec.x;
				this->y /= vec.y;
				return *this;
			};
			
			Vec2D& operator*=(T scalar){
				this->x *= scalar;
				this->y *= scalar;
				return *this;
			};
			
			Vec2D& operator/=(T scalar){
				this->x /= scalar;
				this->y /= scalar;
				return *this;
			};
	};

	template<typename T>
	void to_json(json& j, const Vec2D<T> V){
		j = json{{"x",V.x},{"y",V.y}};
	}
	
	template<typename T>
	void from_json(const json& j, Vec2D<T> V){
		j.at("x").get_to(V.x);
		j.at("y").get_to(V.y);
	}

	template<typename T>
	Vec2D<T> operator+(const Vec2D<T> left, const Vec2D<T> right){
		return Vec2D<T>(left.x + right.x, left.y + right.y);
	};

	template<typename T>
	Vec2D<T> operator-(const Vec2D<T> left, const Vec2D<T> right){
		return Vec2D<T>(left.x - right.x, left.y - right.y);
	};

	template<typename T>
	Vec2D<T> operator*(const Vec2D<T> left, const Vec2D<T> right){
		return Vec2D<T>(left.x * right.x, left.y * right.y);
	};

	template<typename T>
	Vec2D<T> operator/(const Vec2D<T> left, const Vec2D<T> right){
		return Vec2D<T>(left.x / right.x, left.y / right.y);
	};

	template<typename T>
	Vec2D<T> operator/(const Vec2D<T> left, T scalar){
		return Vec2D<T>(left.x / scalar, left.y / scalar);
	};

	template<typename T>
	Vec2D<T> operator*(const Vec2D<T> left, T scalar){
		return Vec2D<T>(left.x * scalar, left.y * scalar);
	};

	template<typename T>
	Vec2D<T> cartesianToPolar(T x, T y) {
		return Vec2D<T>{sqrt(x * x + y * y), atan(y / x)}; // r,theta
	}

	template<typename T>
	Vec2D<T> polarToCartesian(T r, T q) {
		return Vec2D<T>{r * cos(q), r * sin(q)};
	}
}

using Vec2Df = VISEQ::VMATH::Vec2D<float>;