#define @0
#define @1
#define @2
#define @3
#define @@
#define uniform
#define varying
struct vec2
{
	vec2(double t) {};
	vec2(double x, double y) {};
	double x;
	double y;
	vec2 operator + (vec2);
	vec2 operator - (vec2);
	vec2 operator * (vec2);
	vec2 operator / (vec2);
	vec2 operator + (double);
	vec2 operator - (double);
	vec2 operator * (double);
	vec2 operator / (double);
	friend vec2 operator +(double, vec2);
	friend vec2 operator -(double, vec2);
	friend vec2 operator *(double, vec2);
	friend vec2 operator /(double, vec2);
	void operator += (double);
	void operator -= (double);
	void operator *= (double);
	void operator /= (double);
	void operator += (vec2);
	void operator -= (vec2);
	void operator *= (vec2);
	void operator /= (vec2);
};

struct vec3
{
	vec3(double t) {};
	vec3(double x, double y, double z) {};
	double x;
	double y;
	double z;
	vec3 operator + (vec3);
	vec3 operator - (vec3);
	vec3 operator * (vec3);
	vec3 operator / (vec3);
	vec3 operator + (double);
	vec3 operator - (double);
	vec3 operator * (double);
	vec3 operator / (double);
	friend vec3 operator +(double, vec3);
	friend vec3 operator -(double, vec3);
	friend vec3 operator *(double, vec3);
	friend vec3 operator /(double, vec3);
	void operator += (double);
	void operator -= (double);
	void operator *= (double);
	void operator /= (double);
	void operator += (vec3);
	void operator -= (vec3);
	void operator *= (vec3);
	void operator /= (vec3);
};

struct vec4
{
	vec4(double t) {};
	vec4(double x, double y, double z, double w) {};
	double x;
	double y;
	double z;
	double w;
	vec4 operator + (vec4);
	vec4 operator - (vec4);
	vec4 operator * (vec4);
	vec4 operator / (vec4);
	vec4 operator + (double);
	vec4 operator - (double);
	vec4 operator * (double);
	vec4 operator / (double);
	friend vec4 operator +(double, vec4);
	friend vec4 operator -(double, vec4);
	friend vec4 operator *(double, vec4);
	friend vec4 operator /(double, vec4);
	void operator += (double);
	void operator -= (double);
	void operator *= (double);
	void operator /= (double);
	void operator += (vec4);
	void operator -= (vec4);
	void operator *= (vec4);
	void operator /= (vec4);
};

typedef double sampler2D;
vec4 texture2D(sampler2D t, vec2 uv);
template <typename T> T mix(T a, T b, double c);
template <typename T> T mod(T a, double b);
template <typename T> T fract(T a);
template <typename T> T step(double b, T a);
template <typename T> T smoothstep(double a, double b, T a);