--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OurMath.h	Fri Nov 22 13:54:38 2013 +0600
@@ -0,0 +1,71 @@
+#pragma once
+
+#include <cassert>
+#include <limits>
+
+/*  186 */
+#pragma pack(push, 1)
+struct stru193_math
+{
+  stru193_math();
+  int Cos(int angle);
+  unsigned int Atan2(int x, int y);
+  int Sin(int angle);
+
+  int pTanTable[520];
+  int pCosTable[520];
+  int pInvCosTable[520];
+  static const unsigned int uIntegerPi = 1024;
+  static const unsigned int uIntegerHalfPi = 512;
+  static const unsigned int uIntegerDoublePi = 2048;
+  static const unsigned int uDoublePiMask = 2047;
+  static const unsigned int uPiMask = 1023;
+  static const unsigned int uHalfPiMask = 511;
+};
+#pragma pack(pop)
+
+__int64 fixpoint_mul(int, int);
+__int64 fixpoint_dot(int x1, int x2, int y1, int y2, int z1, int z2);
+__int64 fixpoint_div(int, int);
+__int64 fixpoint_sub_unknown(int, int);
+int fixpoint_from_float(float value);
+int fixpoint_from_int(int lhv, int rhv);
+
+template <typename FloatType>
+inline int bankersRounding(
+  const FloatType& value
+  ) {
+    assert("Method unsupported for this type" && false);
+    return value;
+}
+
+template<> inline int bankersRounding<float>(const float& inValue)
+{
+  union Cast
+  {
+    double d;
+    long l;
+  };
+  volatile Cast c;
+  c.d = inValue + 6755399441055744.0;
+  return c.l;
+}
+
+#pragma push_macro("max")
+#undef max
+template<> inline int bankersRounding<double>(const double& inValue)
+{
+  double maxValue = std::numeric_limits<int>::max();
+  assert(maxValue - 6755399441055744.0 >= inValue);
+  union Cast
+  {
+    double d;
+    long l;
+  };
+  volatile Cast c;
+  c.d = inValue + 6755399441055744.0;
+  return c.l;
+}
+#pragma pop_macro("max")
+
+extern struct stru193_math *stru_5C6E00;