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-rw-r--r--source/Noise.cpp145
-rw-r--r--source/Noise.h64
2 files changed, 188 insertions, 21 deletions
diff --git a/source/Noise.cpp b/source/Noise.cpp
index 93a710970..2a1734497 100644
--- a/source/Noise.cpp
+++ b/source/Noise.cpp
@@ -74,7 +74,7 @@ class cCubicCell2D
{
public:
cCubicCell2D(
- cNoise & a_Noise, ///< Noise to use for generating the random values
+ const cNoise & a_Noise, ///< Noise to use for generating the random values
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
const NOISE_DATATYPE * a_FracX, ///< Pointer to the array that stores the X fractional values
@@ -96,7 +96,7 @@ public:
protected:
typedef NOISE_DATATYPE Workspace[4][4];
- cNoise & m_Noise;
+ const cNoise & m_Noise;
Workspace * m_WorkRnds; ///< The current random values; points to either m_Workspace1 or m_Workspace2 (doublebuffering)
Workspace m_Workspace1; ///< Buffer 1 for workspace doublebuffering, used in Move()
@@ -115,7 +115,7 @@ protected:
cCubicCell2D::cCubicCell2D(
- cNoise & a_Noise, ///< Noise to use for generating the random values
+ const cNoise & a_Noise, ///< Noise to use for generating the random values
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
const NOISE_DATATYPE * a_FracX, ///< Pointer to the array that stores the X fractional values
@@ -228,6 +228,15 @@ cNoise::cNoise(unsigned int a_Seed) :
+cNoise::cNoise(const cNoise & a_Noise) :
+ m_Seed(a_Noise.m_Seed)
+{
+}
+
+
+
+
+
NOISE_DATATYPE cNoise::LinearNoise1D(NOISE_DATATYPE a_X) const
{
int BaseX = FAST_FLOOR(a_X);
@@ -370,6 +379,13 @@ NOISE_DATATYPE cNoise::CubicNoise3D(NOISE_DATATYPE a_X, NOISE_DATATYPE a_Y, NOIS
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cCubicNoise:
+#ifdef _DEBUG
+ int cCubicNoise::m_NumSingleX = 0;
+ int cCubicNoise::m_NumSingleXY = 0;
+ int cCubicNoise::m_NumSingleY = 0;
+ int cCubicNoise::m_NumCalls = 0;
+#endif // _DEBUG
+
cCubicNoise::cCubicNoise(int a_Seed) :
m_Noise(a_Seed)
{
@@ -383,9 +399,8 @@ void cCubicNoise::Generate2D(
NOISE_DATATYPE * a_Array, ///< Array to generate into [x + a_SizeX * y]
int a_SizeX, int a_SizeY, ///< Size of the array (num doubles), 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 ///< Workspace that this function can use and trash
-)
+ NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY ///< Noise-space coords of the array in the Y direction
+) const
{
ASSERT(a_SizeX < MAX_SIZE);
ASSERT(a_SizeY < MAX_SIZE);
@@ -407,6 +422,23 @@ void cCubicNoise::Generate2D(
Cell.InitWorkRnds(FloorX[0], FloorY[0]);
+ #ifdef _DEBUG
+ // Statistics on the noise-space coords:
+ if (NumSameX == 1)
+ {
+ m_NumSingleX++;
+ if (NumSameY == 1)
+ {
+ m_NumSingleXY++;
+ }
+ }
+ if (NumSameY == 1)
+ {
+ m_NumSingleY++;
+ }
+ m_NumCalls++;
+ #endif _DEBUG
+
// Calculate query values using Cell:
int FromY = 0;
for (int y = 0; y < NumSameY; y++)
@@ -435,7 +467,7 @@ void cCubicNoise::CalcFloorFrac(
NOISE_DATATYPE a_Start, NOISE_DATATYPE a_End,
int * a_Floor, NOISE_DATATYPE * a_Frac,
int * a_Same, int & a_NumSame
-)
+) const
{
NOISE_DATATYPE val = a_Start;
NOISE_DATATYPE dif = (a_End - a_Start) / a_Size;
@@ -470,3 +502,102 @@ void cCubicNoise::CalcFloorFrac(
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cPerlinNoise:
+
+cPerlinNoise::cPerlinNoise(void) :
+ m_Seed(0)
+{
+}
+
+
+
+
+
+cPerlinNoise::cPerlinNoise(int a_Seed) :
+ m_Seed(a_Seed)
+{
+}
+
+
+
+
+
+void cPerlinNoise::SetSeed(int a_Seed)
+{
+ m_Seed = a_Seed;
+}
+
+
+
+
+
+void cPerlinNoise::AddOctave(float a_Frequency, float a_Amplitude)
+{
+ m_Octaves.push_back(cOctave(m_Seed * (m_Octaves.size() + 4) * 4 + 1024, a_Frequency, a_Amplitude));
+}
+
+
+
+
+
+void cPerlinNoise::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 ///< Workspace that this function can use and trash
+) const
+{
+ if (m_Octaves.empty())
+ {
+ // No work to be done
+ return;
+ }
+
+ bool ShouldFreeWorkspace = (a_Workspace == NULL);
+ int ArrayCount = a_SizeX * a_SizeY;
+ if (ShouldFreeWorkspace)
+ {
+ a_Workspace = new NOISE_DATATYPE[ArrayCount];
+ }
+
+ // Generate the first octave directly into array:
+ m_Octaves.front().m_Noise.Generate2D(
+ a_Workspace, a_SizeX, a_SizeY,
+ a_StartX * m_Octaves.front().m_Frequency, a_EndX * m_Octaves.front().m_Frequency,
+ a_StartY * m_Octaves.front().m_Frequency, a_EndY * m_Octaves.front().m_Frequency
+ );
+ NOISE_DATATYPE Amplitude = m_Octaves.front().m_Amplitude;
+ for (int i = 0; i < ArrayCount; i++)
+ {
+ a_Array[i] *= Amplitude;
+ }
+
+ // Add each octave:
+ for (cOctaves::const_iterator itr = m_Octaves.begin() + 1, end = m_Octaves.end(); itr != end; ++itr)
+ {
+ // Generate cubic noise for the octave:
+ itr->m_Noise.Generate2D(
+ a_Workspace, a_SizeX, a_SizeY,
+ a_StartX * itr->m_Frequency, a_EndX * itr->m_Frequency,
+ a_StartY * itr->m_Frequency, a_EndY * itr->m_Frequency
+ );
+ // Add the cubic noise into the output:
+ NOISE_DATATYPE Amplitude = itr->m_Amplitude;
+ for (int i = 0; i < ArrayCount; i++)
+ {
+ a_Array[i] += a_Workspace[i] * Amplitude;
+ }
+ }
+
+ if (ShouldFreeWorkspace)
+ {
+ delete[] a_Workspace;
+ }
+}
+
+
+
+
diff --git a/source/Noise.h b/source/Noise.h
index 2829ac827..983ecb4b6 100644
--- a/source/Noise.h
+++ b/source/Noise.h
@@ -26,6 +26,7 @@ class cNoise
{
public:
cNoise(unsigned int a_Seed);
+ cNoise(const cNoise & a_Noise);
// The following functions, if not marked INLINE, are about 20 % slower
INLINE NOISE_DATATYPE IntNoise1D(int a_X) const;
@@ -139,18 +140,16 @@ public:
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
- );
+ NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX ///< Noise-space coords of the array
+ ) 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
- );
+ NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY ///< Noise-space coords of the array in the Y direction
+ ) const;
void Generate3D(
@@ -158,15 +157,22 @@ public:
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
- );
+ NOISE_DATATYPE a_StartZ, NOISE_DATATYPE a_EndZ ///< Noise-space coords of the array in the Z direction
+ ) const;
protected:
typedef NOISE_DATATYPE Workspace1D[4];
typedef NOISE_DATATYPE Workspace2D[4][4];
cNoise m_Noise; // Used for integral rnd values
+
+ #ifdef _DEBUG
+ // Statistics on the noise-space coords:
+ static int m_NumSingleX;
+ static int m_NumSingleXY;
+ static int m_NumSingleY;
+ static int m_NumCalls;
+ #endif // _DEBUG
/// Calculates the integral and fractional parts along one axis.
void CalcFloorFrac(
@@ -174,7 +180,7 @@ protected:
NOISE_DATATYPE a_Start, NOISE_DATATYPE a_End,
int * a_Floor, NOISE_DATATYPE * a_Frac,
int * a_Same, int & a_NumSame
- );
+ ) const;
void UpdateWorkRnds2DX(
Workspace2D & a_WorkRnds,
@@ -182,7 +188,7 @@ protected:
int a_LastFloorX, int a_NewFloorX,
int a_FloorY,
NOISE_DATATYPE a_FractionY
- );
+ ) const;
} ;
@@ -192,12 +198,20 @@ protected:
class cPerlinNoise
{
public:
+ cPerlinNoise(void);
+ cPerlinNoise(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(
@@ -206,7 +220,7 @@ public:
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(
@@ -216,7 +230,29 @@ public:
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;
} ;