1 files changed, 101 insertions, 0 deletions

diff --git a/tests/NoiseTest/NoiseTest.cpp b/tests/NoiseTest/NoiseTest.cpp
new file mode 100644
index 000000000..5542f3ca6
--- /dev/null
+++ b/tests/NoiseTest/NoiseTest.cpp
@@ -0,0 +1,101 @@
+
+// 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();
+}