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-rw-r--r--src/Noise.cpp170
-rw-r--r--src/Noise.h64
2 files changed, 233 insertions, 1 deletions
diff --git a/src/Noise.cpp b/src/Noise.cpp
index 89115d992..9c7042b02 100644
--- a/src/Noise.cpp
+++ b/src/Noise.cpp
@@ -854,7 +854,7 @@ void cPerlinNoise::Generate2D(
NOISE_DATATYPE Amplitude = FirstOctave.m_Amplitude;
for (int i = 0; i < ArrayCount; i++)
{
- a_Array[i] *= Amplitude;
+ a_Array[i] = a_Workspace[i] * Amplitude;
}
// Add each octave:
@@ -949,3 +949,171 @@ void cPerlinNoise::Generate3D(
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cRidgedMultiNoise:
+
+cRidgedMultiNoise::cRidgedMultiNoise(void) :
+ m_Seed(0)
+{
+}
+
+
+
+
+
+cRidgedMultiNoise::cRidgedMultiNoise(int a_Seed) :
+ m_Seed(a_Seed)
+{
+}
+
+
+
+
+
+void cRidgedMultiNoise::SetSeed(int a_Seed)
+{
+ m_Seed = a_Seed;
+}
+
+
+
+
+
+void cRidgedMultiNoise::AddOctave(float a_Frequency, float a_Amplitude)
+{
+ m_Octaves.push_back(cOctave(m_Seed * ((int)m_Octaves.size() + 4) * 4 + 1024, a_Frequency, a_Amplitude));
+}
+
+
+
+
+
+void cRidgedMultiNoise::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
+ ASSERT(!"RidgedMulti: No octaves to generate!");
+ 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:
+ const cOctave & FirstOctave = m_Octaves.front();
+
+ FirstOctave.m_Noise.Generate2D(
+ a_Workspace, a_SizeX, a_SizeY,
+ a_StartX * FirstOctave.m_Frequency, a_EndX * FirstOctave.m_Frequency,
+ a_StartY * FirstOctave.m_Frequency, a_EndY * FirstOctave.m_Frequency
+ );
+ NOISE_DATATYPE Amplitude = FirstOctave.m_Amplitude;
+ for (int i = 0; i < ArrayCount; i++)
+ {
+ a_Array[i] = std::abs(a_Workspace[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] += std::abs(a_Workspace[i] * Amplitude);
+ }
+ }
+
+ if (ShouldFreeWorkspace)
+ {
+ delete[] a_Workspace;
+ }
+}
+
+
+
+
+
+void cRidgedMultiNoise::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 ///< Workspace that this function can use and trash
+) const
+{
+ if (m_Octaves.empty())
+ {
+ // No work to be done
+ ASSERT(!"RidgedMulti: No octaves to generate!");
+ return;
+ }
+
+ bool ShouldFreeWorkspace = (a_Workspace == NULL);
+ int ArrayCount = a_SizeX * a_SizeY * a_SizeZ;
+ if (ShouldFreeWorkspace)
+ {
+ a_Workspace = new NOISE_DATATYPE[ArrayCount];
+ }
+
+ // Generate the first octave directly into array:
+ const cOctave & FirstOctave = m_Octaves.front();
+
+ FirstOctave.m_Noise.Generate3D(
+ a_Workspace, a_SizeX, a_SizeY, a_SizeZ,
+ a_StartX * FirstOctave.m_Frequency, a_EndX * FirstOctave.m_Frequency,
+ a_StartY * FirstOctave.m_Frequency, a_EndY * FirstOctave.m_Frequency,
+ a_StartZ * FirstOctave.m_Frequency, a_EndZ * FirstOctave.m_Frequency
+ );
+ NOISE_DATATYPE Amplitude = FirstOctave.m_Amplitude;
+ for (int i = 0; i < ArrayCount; i++)
+ {
+ a_Array[i] = a_Workspace[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.Generate3D(
+ a_Workspace, a_SizeX, a_SizeY, a_SizeZ,
+ a_StartX * itr->m_Frequency, a_EndX * itr->m_Frequency,
+ a_StartY * itr->m_Frequency, a_EndY * itr->m_Frequency,
+ a_StartZ * itr->m_Frequency, a_EndZ * 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/src/Noise.h b/src/Noise.h
index e605051b5..83af0cf08 100644
--- a/src/Noise.h
+++ b/src/Noise.h
@@ -192,6 +192,70 @@ 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
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-09 03:09:35 +0100