fpoint.cpp File Reference

#include "fpoint.h"
#include <cstdio>
#include <cmath>

Go to the source code of this file.

Macros
#define	_USE_MATH_DEFINES

Functions
float	DistanceBetween (FPOINT A, FPOINT B)
float	NormalizedAngleFrom (FPOINT *Point1, FPOINT *Point2, float FullScale)

Macro Definition Documentation

_USE_MATH_DEFINES

#define _USE_MATH_DEFINES

Definition at line 19 of file fpoint.cpp.

Function Documentation

DistanceBetween()

float DistanceBetween	(	FPOINT	A,
		FPOINT	B
	)

Definition at line 28 of file fpoint.cpp.

                                          {
  const double xd = XDelta(A, B);
  const double yd = YDelta(A, B);
  return sqrt(static_cast<double>(xd * xd + yd * yd));

NormalizedAngleFrom()

float NormalizedAngleFrom	(	FPOINT *	Point1,
		FPOINT *	Point2,
		float	FullScale
	)

Return the angle from Point1 to Point2 normalized to lie in the range 0 to FullScale (where FullScale corresponds to 2*pi or 360 degrees).

Parameters

Point1	points to compute angle between
Point2	points to compute angle between
FullScale	value to associate with 2*pi

Returns

angle

Definition at line 43 of file fpoint.cpp.

                                                                           {
  float NumRadsInCircle = 2.0 * M_PI;
 
  float Angle = AngleFrom (*Point1, *Point2);
  if (Angle < 0.0)
    Angle += NumRadsInCircle;
  Angle *= FullScale / NumRadsInCircle;
  if (Angle < 0.0 || Angle >= FullScale)
    Angle = 0.0;
  return (Angle);