Utils.h

/*
 * Utils.h
 *
 *  Created on: 23/nov/2016
 *      Author: bertini
 */

#ifndef UTILS_H_
#define UTILS_H_

template<typename T>
static inline T _abs(const T &a) {
	return a < 0 ? -a : a;
}

static inline bool almostEqualFloat(float A, float B, float eps) {
	if (A == 0) {
		return _abs(B) < eps;
	} else if (B == 0) {
		return _abs(A) < eps;
	} else {
#if 0
		float d = max(_abs(A), _abs(B));
		float g = (_abs(A - B) / d);
#else
		float g = _abs(A - B);
#endif
		if (g <= eps) {
			return true;
		} else {
			return false;
		}
	}
}

static inline bool almostEqualFloat(float A, float B) {
	return almostEqualFloat(A, B, 0.2f);
}

static inline bool almostUnequalFloat(float a, float b) {
	return !almostEqualFloat(a, b);
}

static inline float _min(float x, float y) {
	return x < y ? x : y;
}

static inline float _max(float x, float y) {
	return x > y ? x : y;
}

static inline float clamp(float x, float start, float end) {
	return _min(_max(x, start), end);
}

#endif /* UTILS_H_ */