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-rw-r--r--src/Noise.h84
1 files changed, 80 insertions, 4 deletions
diff --git a/src/Noise.h b/src/Noise.h
index 62004503f..4cf8d4ad8 100644
--- a/src/Noise.h
+++ b/src/Noise.h
@@ -5,6 +5,12 @@
#pragma once
+#include <cmath>
+
+
+
+
+
// Some settings
#define NOISE_DATATYPE float
@@ -33,6 +39,12 @@ public:
INLINE NOISE_DATATYPE IntNoise2D(int a_X, int a_Y) const;
INLINE NOISE_DATATYPE IntNoise3D(int a_X, int a_Y, int a_Z) const;
+ // Return a float number in the specified range:
+ INLINE NOISE_DATATYPE IntNoise2DInRange(int a_X, int a_Y, float a_Min, float a_Max) const
+ {
+ return a_Min + std::abs(IntNoise2D(a_X, a_Y)) * (a_Max - a_Min);
+ }
+
// Note: These functions have a mod8-irregular chance - each of the mod8 remainders has different chance of occurrence. Divide by 8 to rectify.
INLINE int IntNoise1DInt(int a_X) const;
INLINE int IntNoise2DInt(int a_X, int a_Y) const;
@@ -100,7 +112,7 @@ protected:
cNoise m_Noise; // Used for integral rnd values
#ifdef _DEBUG
- // Statistics on the noise-space coords:
+ // Statistics on the noise-space coords:
static int m_NumSingleX;
static int m_NumSingleXY;
static int m_NumSingleY;
@@ -192,7 +204,71 @@ protected:
-///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+class cRidgedMultiNoise
+{
+public:
+ cRidgedMultiNoise(void);
+ cRidgedMultiNoise(int a_Seed);
+
+
+ void SetSeed(int a_Seed);
+
+ void AddOctave(NOISE_DATATYPE a_Frequency, NOISE_DATATYPE a_Amplitude);
+
+ void Generate1D(
+ NOISE_DATATYPE * a_Array, ///< Array to generate into
+ int a_SizeX, ///< Count of the array
+ NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX, ///< Noise-space coords of the array
+ NOISE_DATATYPE * a_Workspace = NULL ///< Workspace that this function can use and trash
+ ) const;
+
+
+ void Generate2D(
+ NOISE_DATATYPE * a_Array, ///< Array to generate into [x + a_SizeX * y]
+ int a_SizeX, int a_SizeY, ///< Count of the array, in each direction
+ NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX, ///< Noise-space coords of the array in the X direction
+ NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY, ///< Noise-space coords of the array in the Y direction
+ NOISE_DATATYPE * a_Workspace = NULL ///< Workspace that this function can use and trash
+ ) const;
+
+
+ void Generate3D(
+ NOISE_DATATYPE * a_Array, ///< Array to generate into [x + a_SizeX * y + a_SizeX * a_SizeY * z]
+ int a_SizeX, int a_SizeY, int a_SizeZ, ///< Count of the array, in each direction
+ NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX, ///< Noise-space coords of the array in the X direction
+ NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY, ///< Noise-space coords of the array in the Y direction
+ NOISE_DATATYPE a_StartZ, NOISE_DATATYPE a_EndZ, ///< Noise-space coords of the array in the Z direction
+ NOISE_DATATYPE * a_Workspace = NULL ///< Workspace that this function can use and trash
+ ) const;
+
+protected:
+ class cOctave
+ {
+ public:
+ cCubicNoise m_Noise;
+
+ NOISE_DATATYPE m_Frequency; // Coord multiplier
+ NOISE_DATATYPE m_Amplitude; // Value multiplier
+
+ cOctave(int a_Seed, NOISE_DATATYPE a_Frequency, NOISE_DATATYPE a_Amplitude) :
+ m_Noise(a_Seed),
+ m_Frequency(a_Frequency),
+ m_Amplitude(a_Amplitude)
+ {
+ }
+ } ;
+
+ typedef std::vector<cOctave> cOctaves;
+
+ int m_Seed;
+ cOctaves m_Octaves;
+} ;
+
+
+
+
+
+////////////////////////////////////////////////////////////////////////////////
// Inline function definitions:
// These need to be in the header, otherwise linker error occur in MSVC
@@ -280,7 +356,7 @@ NOISE_DATATYPE cNoise::CubicInterpolate(NOISE_DATATYPE a_A, NOISE_DATATYPE a_B,
NOISE_DATATYPE cNoise::CosineInterpolate(NOISE_DATATYPE a_A, NOISE_DATATYPE a_B, NOISE_DATATYPE a_Pct)
{
const NOISE_DATATYPE ft = a_Pct * (NOISE_DATATYPE)3.1415927;
- const NOISE_DATATYPE f = (1 - cos(ft)) * (NOISE_DATATYPE)0.5;
+ const NOISE_DATATYPE f = (NOISE_DATATYPE)((NOISE_DATATYPE)(1 - cos(ft)) * (NOISE_DATATYPE)0.5);
return a_A * (1 - f) + a_B * f;
}
@@ -297,7 +373,7 @@ NOISE_DATATYPE cNoise::LinearInterpolate(NOISE_DATATYPE a_A, NOISE_DATATYPE a_B,
-///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////////
// Global functions:
extern void Debug2DNoise(const NOISE_DATATYPE * a_Noise, int a_SizeX, int a_SizeY, const AString & a_FileNameBase);