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// NoiseTest.cpp
// Implements the main app entrypoint
#include "Globals.h"
#include <time.h>
#include "Noise.h"
void SaveValues(NOISE_DATATYPE * a_Values, const AString & a_FileName)
{
cFile f;
if (!f.Open(a_FileName, cFile::fmWrite))
{
LOGWARNING("Cannot write file %s", a_FileName.c_str());
return;
}
for (int y = 0; y < 256; y++)
{
unsigned char val[256];
for (int x = 0; x < 256; x++)
{
val[x] = std::min(255, std::max(0, (int)(256 * a_Values[x + 256 * y])));
}
f.Write(val, 256);
}
}
clock_t TestCubicNoise(void)
{
cCubicNoise Cubic(0);
NOISE_DATATYPE Values[256 * 256];
// Do a speed test:
clock_t Begin = clock();
for (int i = 0; i < 1000; i++)
{
Cubic.Generate2D(Values, 256, 256, 0, (NOISE_DATATYPE)25.6, 0, (NOISE_DATATYPE)25.6);
}
clock_t Ticks = clock() - Begin;
LOG("cCubicNoise generating 1000 * 256x256 values took %d ticks (%.02f sec)", Ticks, (double)Ticks / CLOCKS_PER_SEC);
// Save the results into a file for visual comparison:
SaveValues(Values, "NoiseCubic.raw");
return Ticks;
}
clock_t TestOldNoise(void)
{
cNoise Noise(0);
NOISE_DATATYPE Values[256 * 256];
// Do a speed test:
clock_t Begin = clock();
for (int i = 0; i < 1000; i++)
{
for (int y = 0; y < 256; y++)
{
float fy = (float)y / 10;
for (int x = 0; x < 256; x++)
{
Values[x + 256 * y] = Noise.CubicNoise2D((float)x / 10, fy);
} // for x
} // for y
}
clock_t Ticks = clock() - Begin;
LOG("cNoise generating 1000 * 256x256 values took %d ticks (%.02f sec)", Ticks, (double)Ticks / CLOCKS_PER_SEC);
// Save the results into a file for visual comparison:
SaveValues(Values, "NoiseOld.raw");
return Ticks;
}
int main(int argc, char * argv[])
{
new cMCLogger(); // Create a logger (will set itself as the main instance
clock_t NewTicks = TestCubicNoise();
clock_t OldTicks = TestOldNoise();
LOG("New method is %.02fx faster", (double)OldTicks / NewTicks);
LOG("Press Enter to quit program");
getchar();
}
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