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authorMattes D <github@xoft.cz>2014-11-19 16:58:27 +0100
committerMattes D <github@xoft.cz>2014-11-19 16:58:27 +0100
commitfef4133f6d7a3bbd08cba15034d0004aa1a76753 (patch)
treeba0776b563e49ee44427630e241cf7b5e192d261 /src/Generating/Noise3DGenerator.cpp
parentcOctavedNoise: Removed misleading comment, fixed assert texts. (diff)
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Diffstat (limited to 'src/Generating/Noise3DGenerator.cpp')
-rw-r--r--src/Generating/Noise3DGenerator.cpp61
1 files changed, 54 insertions, 7 deletions
diff --git a/src/Generating/Noise3DGenerator.cpp b/src/Generating/Noise3DGenerator.cpp
index d051948c4..78b739d32 100644
--- a/src/Generating/Noise3DGenerator.cpp
+++ b/src/Generating/Noise3DGenerator.cpp
@@ -69,6 +69,15 @@ static class cInterpolNoiseSpeedTest
public:
cInterpolNoiseSpeedTest(void)
{
+ TestSpeed2D();
+ TestSpeed3D();
+ printf("InterpolNoise speed comparison finished.\n");
+ }
+
+
+ /** Compare the speed of the 3D InterpolNoise vs 3D CubicNoise. */
+ void TestSpeed3D(void)
+ {
printf("Evaluating 3D noise performance...\n");
static const int SIZE_X = 128;
static const int SIZE_Y = 128;
@@ -99,6 +108,38 @@ public:
printf("3D noise performance comparison finished.\n");
}
+
+ /** Compare the speed of the 2D InterpolNoise vs 2D CubicNoise. */
+ void TestSpeed2D(void)
+ {
+ printf("Evaluating 2D noise performance...\n");
+ static const int SIZE_X = 128;
+ static const int SIZE_Y = 128;
+ static const NOISE_DATATYPE MUL = 80;
+ std::unique_ptr<NOISE_DATATYPE[]> arr(new NOISE_DATATYPE[SIZE_X * SIZE_Y]);
+ cTimer timer;
+
+ // Test the cInterpolNoise:
+ cInterpolNoise<Interp5Deg> interpNoise(1);
+ long long start = timer.GetNowTime();
+ for (int i = 0; i < 500; i++)
+ {
+ interpNoise.Generate2D(arr.get(), SIZE_X, SIZE_Y, MUL * i, MUL * i + MUL, 0, MUL);
+ }
+ long long end = timer.GetNowTime();
+ printf("InterpolNoise took %.02f sec\n", static_cast<float>(end - start) / 1000);
+
+ // Test the cCubicNoise:
+ cCubicNoise cubicNoise(1);
+ start = timer.GetNowTime();
+ for (int i = 0; i < 500; i++)
+ {
+ cubicNoise.Generate2D(arr.get(), SIZE_X, SIZE_Y, MUL * i, MUL * i + MUL, 0, MUL);
+ }
+ end = timer.GetNowTime();
+ printf("CubicNoise took %.02f sec\n", static_cast<float>(end - start) / 1000);
+ printf("2D noise performance comparison finished.\n");
+ }
} g_InterpolNoiseSpeedTest;
#endif
@@ -120,6 +161,12 @@ cNoise3DGenerator::cNoise3DGenerator(cChunkGenerator & a_ChunkGenerator) :
m_Perlin.AddOctave(8, 0.125);
m_Perlin.AddOctave(16, 0.0625);
+ m_Cubic.AddOctave(1, 1);
+ m_Cubic.AddOctave(2, 0.5);
+ m_Cubic.AddOctave(4, 0.25);
+ m_Cubic.AddOctave(8, 0.125);
+ m_Cubic.AddOctave(16, 0.0625);
+
#if 0
// DEBUG: Test the noise generation:
// NOTE: In order to be able to run MCS with this code, you need to increase the default thread stack size
@@ -201,8 +248,8 @@ void cNoise3DGenerator::Initialize(cIniFile & a_IniFile)
{
// Params:
m_SeaLevel = a_IniFile.GetValueSetI("Generator", "Noise3DSeaLevel", 62);
- m_HeightAmplification = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DHeightAmplification", 0);
- m_MidPoint = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DMidPoint", 75);
+ m_HeightAmplification = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DHeightAmplification", 0.1);
+ m_MidPoint = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DMidPoint", 68);
m_FrequencyX = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DFrequencyX", 8);
m_FrequencyY = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DFrequencyY", 8);
m_FrequencyZ = (NOISE_DATATYPE)a_IniFile.GetValueSetF("Generator", "Noise3DFrequencyZ", 8);
@@ -280,23 +327,23 @@ void cNoise3DGenerator::GenerateNoiseArray(int a_ChunkX, int a_ChunkZ, NOISE_DAT
// Precalculate a "height" array:
NOISE_DATATYPE Height[DIM_X * DIM_Z]; // Output for the cubic noise heightmap ("source")
- m_Cubic.Generate2D(Height, DIM_X, DIM_Z, StartX / 25, EndX / 25, StartZ / 25, EndZ / 25);
+ m_Cubic.Generate2D(Height, DIM_X, DIM_Z, StartX / 5, EndX / 5, StartZ / 5, EndZ / 5);
for (size_t i = 0; i < ARRAYCOUNT(Height); i++)
{
- Height[i] = std::abs(Height[i]) * m_HeightAmplification + 1;
+ Height[i] = Height[i] * m_HeightAmplification;
}
// Modify the noise by height data:
for (int y = 0; y < DIM_Y; y++)
{
- NOISE_DATATYPE AddHeight = (y * UPSCALE_Y - m_MidPoint) / 20;
- AddHeight *= AddHeight * AddHeight;
+ NOISE_DATATYPE AddHeight = (y * UPSCALE_Y - m_MidPoint) / 30;
+ // AddHeight *= AddHeight * AddHeight;
for (int z = 0; z < DIM_Z; z++)
{
NOISE_DATATYPE * CurRow = &(NoiseO[y * DIM_X + z * DIM_X * DIM_Y]);
for (int x = 0; x < DIM_X; x++)
{
- CurRow[x] += AddHeight / Height[x + DIM_X * z];
+ CurRow[x] += AddHeight + Height[x + DIM_X * z];
}
}
}