Forgot to commit some stuff (noise+dynaterrain) from previous commit

src/Nazara/Noise/NoiseBase.cpp

@@ -54,6 +54,42 @@ void NzNoiseBase::ShufflePermutationTable()
         perm[i] = perm[i & 255];
 }
 
+int NzNoiseBase::fastfloor(float n)
+{
+    if(n >= 0)
+        return static_cast<int>(n);
+    else
+        return static_cast<int>(n-1);
+}
+
+int NzNoiseBase::JenkinsHash(int a, int b, int c)
+{
+    a = a-b;  a = a - c;  a = a^(static_cast<unsigned int>(c) >> 13);
+    b = b-c;  b = b - a;  b = b^(a << 8);
+    c = c-a;  c = c - b;  c = c^(static_cast<unsigned int>(b) >> 13);
+    a = a-b;  a = a - c;  a = a^(static_cast<unsigned int>(c) >> 12);
+    b = b-c;  b = b - a;  b = b^(a << 16);
+    c = c-a;  c = c - b;  c = c^(static_cast<unsigned int>(b) >> 5);
+    a = a-b;  a = a - c;  a = a^(static_cast<unsigned int>(c) >> 3);
+    b = b-c;  b = b - a;  b = b^(a << 10);
+    c = c-a;  c = c - b;  c = c^(static_cast<unsigned int>(b) >> 15);
+    return c;
+}
+
+/*
+//key = 64 bits
+public long hash64shift(long key)
+{
+  key = (~key) + (key << 21); // key = (key << 21) - key - 1;
+  key = key ^ (key >>> 24);
+  key = (key + (key << 3)) + (key << 8); // key * 265
+  key = key ^ (key >>> 14);
+  key = (key + (key << 2)) + (key << 4); // key * 21
+  key = key ^ (key >>> 28);
+  key = key + (key << 31);
+  return key;
+}*/
+
 NzNoiseBase::~NzNoiseBase()
 {
     //dtor