GalileoFunctions.h File Reference

#include <math/Vector3.h>
#include <math/ONB.h>
#include <utilities/config.h>
#include <utilities/rgb.h>

Defines
#define	_GR_FUNCTIONS_   1
#define	GRAssert(condition)   (condition) ? (void)0 : GRAssertHelper(__FILE__, __LINE__);
#define	likely(x)   (x)
#define	unlikely(x)   (x)
Functions
double	GRMin (double a, double b)
double	GRMax (double a, double b)
int	GRAbs (int x)
double	GRLerp (double factor, double a, double b)
double	GRHermite (double x)
float	GRPowerHeuristic (float pdf1, float pdf2)
bool	GRisnan (float val)
double	GRDegRad (double a)
double	GRRadDeg (double a)
int	GRClamp (int x, int min, int max)
int	GRFloor (double x)
Vector3	GRReflect (const Vector3 &v_out, const Vector3 &n)
Vector3	GRRefract (const Vector3 &v_out, const Vector3 &n, double eta)
rgb	GRNormalReflectance (const rgb &eta)
rgb	GRFresnelReflectance (const rgb &eta, double cos_theta)
Vector3	GRRandDir (double uRand1, double uRand2)
void	GRCosineSampleHemisphere (double r1, double r2, const ONB &uvw, Vector3 &v)
bool	isBigEndian ()
template<class T>
void	swapBytes (T &t)
void	GRError (const char *format,...)
void	GRWarning (const char *format,...)
void	GRAssertHelper (char *filename, int line_number)
void	GRLowercase (char *original)
bool	GRFileExtension (const char *original, char *extension_buf)
bool	GRFileName (const char *original, char *filename_buf)

---

Detailed Description

A set of general purpose functions for the galileo renderer.

---

Function Documentation

Vector3 GRReflect (  const Vector3 &  v_out, const Vector3 &  n )  [inline]

Calculates the direction of a reflected light ray. Parameters: [in]  v_out  Incident vector that points away from the reflecting surface [in]  n  Unit-length normal vector Returns: The direction that results when vOut is reflected about n.

Vector3 GRRefract (  const Vector3 &  v_out, const Vector3 &  n, double  eta )  [inline]

Calculates the direction of a refracted light ray. Parameters: [in]  v_out  Incident vector that points away from the refracting surface [in]  n  Unit-length normal vector in the same hemisphere as vOut [in]  eta  Ratio of the index of refraction in the incident material to the index of refraction in the other material Returns: The direction of the refracted ray. Total internal reflection is handled correctly.

rgb GRNormalReflectance (  const rgb &  eta  )  [inline]

Calculates the percentage of reflected light for a beam with normal incidence. Parameters: [in]  eta  Ratio of indices of refraction (incident / refracted) Returns: The fresnel reflectance for a beam at normal incidence

rgb GRFresnelReflectance (  const rgb &  eta, double  cos_theta )  [inline]

Calculates the Fresnel reflectance for a beam with incident angle theta. Parameters: [in]  eta  Ratio of indices of refraction (incident / refracted) [in]  cos_theta  Cosine of the angle of incidence of the beam Returns: The reflectance for the beam.

---