From 0ea5fc66924303d1bf73ba283a383e2aadee02f2 Mon Sep 17 00:00:00 2001 From: neodarz Date: Sat, 11 Aug 2018 20:21:34 +0200 Subject: Initial commit --- docs/doxygen/nel/a02990.html | 457 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 457 insertions(+) create mode 100644 docs/doxygen/nel/a02990.html (limited to 'docs/doxygen/nel/a02990.html') diff --git a/docs/doxygen/nel/a02990.html b/docs/doxygen/nel/a02990.html new file mode 100644 index 00000000..d3114603 --- /dev/null +++ b/docs/doxygen/nel/a02990.html @@ -0,0 +1,457 @@ + + +NeL: NLMISC::CNoiseValue class Reference + + + +
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+

NLMISC::CNoiseValue Class Reference

#include <noise_value.h> +

+

Detailed Description

+A class which generate noisy value, according to a position
Author:
Lionel Berenguier

+Nevrax France

+
Date:
2001
+ +

+ +

+Definition at line 49 of file noise_value.h. + + + + + + + + + + + + + + + + + + + + + + + + + + +

Public Member Functions

 CNoiseValue (float abs, float rand, float freq)
 CNoiseValue ()
 Default to 0, 1, 1.

float eval (const CVector &posInWorld) const
float evalOneLevelRandom (const CVector &posInWorld) const
void serial (IStream &f)

Data Fields

float Abs
float Frequency
float Rand

Private Member Functions

float evalRandom (const CVector &pos) const
float noise (const CVector &pos) const
 pos scale is in [0..1]

+

Constructor & Destructor Documentation

+

+ + + + +
+ + + + + + + + + +
NLMISC::CNoiseValue::CNoiseValue (   ) 
+
+ + + + + +
+   + + +

+Default to 0, 1, 1. +

+ +

+Definition at line 258 of file noise_value.cpp. +

+

00259 {
+00260         Abs= 0;
+00261         Rand= 1;
+00262         Frequency= 1;
+00263 }
+
+

+ + + + +
+ + + + + + + + + + + + + + + + + + + + + + + + + +
NLMISC::CNoiseValue::CNoiseValue ( float  abs,
float  rand,
float  freq
) 
+
+ + + + + +
+   + + +

+ +

+Definition at line 267 of file noise_value.cpp. +

+

00268 {
+00269         Abs= abs;
+00270         Rand= rand;
+00271         Frequency= freq;
+00272 }
+
+

Member Function Documentation

+

+ + + + +
+ + + + + + + + + + +
float NLMISC::CNoiseValue::eval ( const CVector &  posInWorld  )  const
+
+ + + + + +
+   + + +

+return Abs + Rand* noise(Pos*Frequency). with noise() E [0..1]. Warning! Use OptFastFloor()! So call must be enclosed with a OptFastFloorBegin()/OptFastFloorEnd(). +

+Definition at line 276 of file noise_value.cpp. +

+References noise(). +

+Referenced by NLMISC::CNoiseColorGradient::eval(), NL3D::CVegetable::generateGroup(), NL3D::CVegetable::generateGroupBiLinear(), and NL3D::CVegetable::generateInstance(). +

+

00277 {
+00278         // A single cube in the Grid3d correspond to Frequency==1.
+00279         // So enlarging size of the grid3d do not affect the frequency aspect.
+00280         return Abs + Rand * noise(posInWorld*Frequency);
+00281 }
+
+

+ + + + +
+ + + + + + + + + + +
float NLMISC::CNoiseValue::evalOneLevelRandom ( const CVector &  posInWorld  )  const
+
+ + + + + +
+   + + +

+same as eval, but eval just one random level for noise() => act much more like a random. Warning! Use OptFastFloor()! So call must be enclosed with a OptFastFloorBegin()/OptFastFloorEnd(). +

+Definition at line 285 of file noise_value.cpp. +

+References evalRandom(). +

+Referenced by NL3D::CVegetable::generateGroupBiLinear(), and NL3D::CVegetable::generateGroupEx(). +

+

00286 {
+00287         // A single cube in the Grid3d correspond to Frequency==1.
+00288         // So enlarging size of the grid3d do not affect the frequency aspect.
+00289         return Abs + Rand * evalRandom(posInWorld*Frequency);
+00290 }
+
+

+ + + + +
+ + + + + + + + + + +
float NLMISC::CNoiseValue::evalRandom ( const CVector &  pos  )  const [private]
+
+ + + + + +
+   + + +

+ +

+Definition at line 216 of file noise_value.cpp. +

+Referenced by evalOneLevelRandom(). +

+

00217 {
+00218         return CRandomGrid3D::evalNearest(pos);
+00219 }
+
+

+ + + + +
+ + + + + + + + + + +
float NLMISC::CNoiseValue::noise ( const CVector &  pos  )  const [private]
+
+ + + + + +
+   + + +

+pos scale is in [0..1] +

+ +

+Definition at line 223 of file noise_value.cpp. +

+References level, NL3D_NOISE_LEVEL, and uint. +

+Referenced by eval(). +

+

00224 {
+00225         // eval "fractaly".
+00226         float           turb;
+00227 
+00228 #if (NL3D_NOISE_LEVEL != 3)
+00229         CVector         vd= pos;
+00230         turb=0;
+00231         for(uint level=0;level<NL3D_NOISE_LEVEL;level++)
+00232         {
+00233                 // Add the influence of the ith level.
+00234                 turb+= CRandomGrid3D::getLevelSize(level) * 
+00235                         CRandomGrid3D::evalBiLinear(vd + CRandomGrid3D::getLevelPhase(level) );
+00236                 // Next level at higher frequency
+00237                 vd*= 2;
+00238         }
+00239 #else
+00240         // special case. unrolled loop.
+00241         // level 0 has no phase.
+00242         turb= CRandomGrid3D::getLevelSize(0) * 
+00243                 CRandomGrid3D::evalBiLinear(pos);
+00244         // level 1
+00245         turb+= CRandomGrid3D::getLevelSize(1) * 
+00246                 CRandomGrid3D::evalBiLinear(pos*2 + CRandomGrid3D::getLevelPhase(1) );
+00247         // level 2
+00248         turb+= CRandomGrid3D::getLevelSize(2) * 
+00249                 CRandomGrid3D::evalBiLinear(pos*4 + CRandomGrid3D::getLevelPhase(2) );
+00250 #endif
+00251 
+00252         return turb;
+00253 }
+
+

+ + + + +
+ + + + + + + + + + +
void NLMISC::CNoiseValue::serial ( IStream &  f  ) 
+
+ + + + + +
+   + + +

+ +

+Definition at line 294 of file noise_value.cpp. +

+References NLMISC::IStream::serial(), and NLMISC::IStream::serialVersion(). +

+

00295 {
+00296         (void)f.serialVersion(0);
+00297         f.serial(Abs);
+00298         f.serial(Rand);
+00299         f.serial(Frequency);
+00300 }
+
+

Field Documentation

+

+ + + + +
+ + +
float NLMISC::CNoiseValue::Abs +
+
+ + + + + +
+   + + +

+ +

+Definition at line 52 of file noise_value.h. +

+Referenced by NL3D::CVegetable::CVegetable(), and NL3D::CVegetable::generateInstance().

+

+ + + + +
+ + +
float NLMISC::CNoiseValue::Frequency +
+
+ + + + + +
+   + + +

+ +

+Definition at line 54 of file noise_value.h.

+

+ + + + +
+ + +
float NLMISC::CNoiseValue::Rand +
+
+ + + + + +
+   + + +

+ +

+Definition at line 53 of file noise_value.h. +

+Referenced by NL3D::CVegetable::CVegetable(), and NL3D::CVegetable::generateInstance().

+

The documentation for this class was generated from the following files: +
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