#pragma once

#include <math.h>
#include "style.h"
#include "memstrm.h"

#define M_PI	3.14159265358979323846

typedef float Scalar;

#define PI				((Scalar)(M_PI))
#define PI_OVER_2		((Scalar)(M_PI / 2.0))
#define PI_OVER_3		((Scalar)(M_PI / 3.0))
#define PI_OVER_4		((Scalar)(M_PI / 4.0))
#define PI_OVER_6		((Scalar)(M_PI / 6.0))
#define TWO_PI			((Scalar)(2.0 * M_PI))
#define DEG_PER_RAD		((Scalar)(180.0 / M_PI))
#define RAD_PER_DEG		((Scalar)(M_PI / 180.0))

inline Scalar	Lerp(Scalar a, Scalar b, Scalar t)					{ return a * (1.0f - t) + b * t; }
inline Logical	Small_Enough(Scalar x, Scalar e=SMALL)				{ return fabs(x) <= e; }
inline Logical	Close_Enough(Scalar x, Scalar y, Scalar e=SMALL)	{ return fabs(x - y) <= e; }

int Round(Scalar value);

void Find_Roots(Scalar a, Scalar b, Scalar c, Scalar *center, Scalar *range);

inline MemoryStream& MemoryStream_Read(MemoryStream *stream, Scalar *output)		{ return stream->ReadBytes(output, sizeof(*output)); }
inline MemoryStream& MemoryStream_Write(MemoryStream *stream, const Scalar *input)	{ return stream->WriteBytes(input, sizeof(*input)); }

void Convert_From_Ascii(const char *str, Scalar *value);