paysages : Noise adjustements.

git-svn-id: https://subversion.assembla.com/svn/thunderk/paysages@428 b1fd45b6-86a6-48da-8261-f70d1f35bdcc

lib_paysages/noise.c

@@ -31,6 +31,26 @@ void noiseInit()
     noiseSimplexInit();
     noisePerlinInit();
     noiseNaiveInit();
+    
+    /* Noise stats */
+    /*NoiseGenerator* noise;
+    int x;
+    double min, max, value;
+    noise = noiseCreateGenerator();
+    noiseSetFunctionParams(noise, NOISE_FUNCTION_NAIVE, 0.0);
+    noiseAddLevelSimple(noise, 1.0, 1.0);
+    min = 100000.0;
+    max = -100000.0;
+    for (x = 0; x < 1000000; x++)
+    {
+        value = noiseGet1DTotal(noise, toolsRandom() * 10000.0);
+        value = noiseGet2DTotal(noise, toolsRandom() * 10000.0, toolsRandom() * 10000.0);
+        value = noiseGet3DTotal(noise, toolsRandom() * 10000.0, toolsRandom() * 10000.0, toolsRandom() * 10000.0);
+        if (value < min) min = value;
+        if (value > max) max = value;
+    }
+    printf("%f %f\n", min, max);
+    noiseDeleteGenerator(noise);*/
 }
 
 void noiseQuit()

lib_paysages/noisenaive.c

@@ -55,8 +55,9 @@ void noiseNaiveLoad(PackStream* stream)
 
 double noiseNaiveGet1DValue(double x)
 {
-    int size = _noise_pool_size;
+    x *= 3.0;
     
+    int size = _noise_pool_size;
     int xbase = (int)floor(x);
 
     double xinternal = x - (double)xbase;
@@ -89,11 +90,14 @@ double noiseNaiveGet1DValue(double x)
     buf_cubic_x[2] = _noise_pool[x2 % _noise_pool_size];
     buf_cubic_x[3] = _noise_pool[x3 % _noise_pool_size];
     
-    return toolsCubicInterpolate(buf_cubic_x, xinternal);
+    return toolsCubicInterpolate(buf_cubic_x, xinternal) * 0.837;
 }
 
 double noiseNaiveGet2DValue(double x, double y)
 {
+    x *= 3.0;
+    y *= 3.0;
+    
     int size = (int)pow(_noise_pool_size, 0.5);
 
     int xbase = (int)floor(x);
@@ -171,11 +175,15 @@ double noiseNaiveGet2DValue(double x, double y)
     buf_cubic_x[3] = _noise_pool[(y3 * size + x3) % _noise_pool_size];
     buf_cubic_y[3] = toolsCubicInterpolate(buf_cubic_x, xinternal);
 
-    return toolsCubicInterpolate(buf_cubic_y, yinternal);
+    return toolsCubicInterpolate(buf_cubic_y, yinternal) * 0.723;
 }
 
 double noiseNaiveGet3DValue(double x, double y, double z)
 {
+    x *= 3.0;
+    y *= 3.0;
+    z *= 3.0;
+    
     int size = (int)pow(_noise_pool_size, 0.33333333333333333);
 
     int xbase = (int)floor(x);
@@ -357,7 +365,7 @@ double noiseNaiveGet3DValue(double x, double y, double z)
 
     buf_cubic_z[3] =  toolsCubicInterpolate(buf_cubic_y, yinternal);
 
-    return toolsCubicInterpolate(buf_cubic_z, zinternal);
+    return toolsCubicInterpolate(buf_cubic_z, zinternal) * 0.794;
 }
 
 /*double noiseNaiveGet4DValue(double x, double y, double z, double w)

lib_paysages/noiseperlin.c

@@ -39,7 +39,7 @@ static double g1[B + B + 2];
 
 double noisePerlinGet1DValue(double x)
 {
-        double vec[1] = {x};
+        double vec[1] = {x*2.0};
 	int bx0, bx1;
 	double rx0, rx1, sx, t, u, v;
 
@@ -50,12 +50,12 @@ double noisePerlinGet1DValue(double x)
 	u = rx0 * g1[ p[ bx0 ] ];
 	v = rx1 * g1[ p[ bx1 ] ];
 
-	return lerp(sx, u, v);
+	return lerp(sx, u, v) * 1.068;
 }
 
 double noisePerlinGet2DValue(double x, double y)
 {
-        double vec[2] = {x, y};
+        double vec[2] = {x*2.0, y*2.0};
 	int bx0, bx1, by0, by1, b00, b10, b01, b11;
 	double rx0, rx1, ry0, ry1, *q, sx, sy, a, b, t, u, v;
 	int i, j;
@@ -84,12 +84,12 @@ double noisePerlinGet2DValue(double x, double y)
 	q = g2[ b11 ] ; v = at2(rx1,ry1);
 	b = lerp(sx, u, v);
 
-	return lerp(sy, a, b);
+	return lerp(sy, a, b) * 0.709;
 }
 
 double noisePerlinGet3DValue(double x, double y, double z)
 {
-        double vec[3] = {x, y, z};
+        double vec[3] = {x*2.0, y*2.0, z*2.0};
 	int bx0, bx1, by0, by1, bz0, bz1, b00, b10, b01, b11;
 	double rx0, rx1, ry0, ry1, rz0, rz1, *q, sy, sz, a, b, c, d, t, u, v;
 	int i, j;
@@ -132,7 +132,7 @@ double noisePerlinGet3DValue(double x, double y, double z)
 
 	d = lerp(sy, a, b);
 
-	return lerp(sz, c, d);
+	return lerp(sz, c, d) * 0.661;
 }
 
 static void _normalize2(double v[2])