diff options
Diffstat (limited to 'src/Noise.cpp')
| -rw-r--r-- | src/Noise.cpp | 171 |
1 files changed, 1 insertions, 170 deletions
diff --git a/src/Noise.cpp b/src/Noise.cpp index d16c0849c..c4a7e2d5f 100644 --- a/src/Noise.cpp +++ b/src/Noise.cpp @@ -1044,179 +1044,10 @@ NOISE_DATATYPE cImprovedNoise::GetValueAt(int a_X, int a_Y, int a_Z) int A = m_Perm[a_X] + a_Y; int AA = m_Perm[A] + a_Z; - return Grad(m_Perm[AA], 0, 0, 0); + return Grad(m_Perm[AA], 1, 1, 1); } -//////////////////////////////////////////////////////////////////////////////// -// 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 == nullptr); - 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] = fabs(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] += fabs(a_Workspace[i] * Amplitude); - } - } - - if (ShouldFreeWorkspace) - { - delete[] a_Workspace; - a_Workspace = nullptr; - } -} - - - - - -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 == nullptr); - 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; - a_Workspace = nullptr; - } -} - - - - |