--- a/Indoor.cpp	Wed Feb 20 04:36:14 2013 +0200
+++ b/Indoor.cpp	Wed Feb 20 08:23:12 2013 +0200
@@ -192,10 +192,10 @@
   }
   if ( pRenderer->pRenderD3D )
   {
-    v3->sCosineY = stru_5C6E00->SinCos(v3->sPartyRotY);
-    v3->sSineY = stru_5C6E00->SinCos(v3->sPartyRotY - stru_5C6E00->uIntegerHalfPi);
-    v3->sCosineNegX = stru_5C6E00->SinCos(-v3->sPartyRotX);
-    v3->sSineNegX = stru_5C6E00->SinCos(-v3->sPartyRotX - stru_5C6E00->uIntegerHalfPi);
+    v3->sCosineY = stru_5C6E00->Cos(v3->sPartyRotY);
+    v3->sSineY = stru_5C6E00->Sin(v3->sPartyRotY);
+    v3->sCosineNegX = stru_5C6E00->Cos(-v3->sPartyRotX);
+    v3->sSineNegX = stru_5C6E00->Sin(-v3->sPartyRotX);
     v3->fCosineY = cos((3.141592653589793 + 3.141592653589793) * (double)v3->sPartyRotY * 0.00048828125);
     v3->fSineY = sin((3.141592653589793 + 3.141592653589793) * (double)v3->sPartyRotY * 0.00048828125);
     v3->fCosineNegX = cos((3.141592653589793 + 3.141592653589793) * (double)-v3->sPartyRotX * 0.00048828125);
@@ -214,10 +214,10 @@
   }
   else
   {
-    v3->sCosineY = stru_5C6E00->SinCos(-v3->sPartyRotY);
-    v3->sSineY = stru_5C6E00->SinCos(-v3->sPartyRotY - stru_5C6E00->uIntegerHalfPi);
-    v3->sCosineNegX = stru_5C6E00->SinCos(-v3->sPartyRotX);
-    v3->sSineNegX = stru_5C6E00->SinCos(-v3->sPartyRotX - stru_5C6E00->uIntegerHalfPi);
+    v3->sCosineY = stru_5C6E00->Cos(-v3->sPartyRotY);
+    v3->sSineY = stru_5C6E00->Sin(-v3->sPartyRotY);
+    v3->sCosineNegX = stru_5C6E00->Cos(-v3->sPartyRotX);
+    v3->sSineNegX = stru_5C6E00->Sin(-v3->sPartyRotX);
     v17 = cos((double)-v3->sPartyRotY * 0.0030664064);
     v18 = v3->sPartyRotY;
     v3->fCosineY = v17;
@@ -372,10 +372,8 @@
     _this.uFlags |= INDOOR_CAMERA_DRAW_D3D_OUTLINES;
 
   _this.field_0_timer = pEventTimer->uTotalGameTimeElapsed;
-  _this.vPosition.x = pParty->vPosition.x
-                   - ((unsigned __int64)(stru_5C6E00->SinCos(pParty->sRotationY)
-                                       * (signed __int64)pParty->y_rotation_granularity) >> 16);
-  v2 = stru_5C6E00->SinCos(pParty->sRotationY - stru_5C6E00->uIntegerHalfPi);
+  _this.vPosition.x = pParty->vPosition.x - ((unsigned __int64)(stru_5C6E00->Cos(pParty->sRotationY) * (signed __int64)pParty->y_rotation_granularity) >> 16);
+  v2 = stru_5C6E00->Sin(pParty->sRotationY);
   v3 = (unsigned __int64)(v2 * (signed __int64)pParty->y_rotation_granularity) >> 16;
   _this.field_1C_mb_fov = 65;
   _this.vPosition.y = pParty->vPosition.y - v3;
@@ -4030,18 +4028,18 @@
           v6 = (signed __int64)((double)v61 * flt_6BE3AC_debug_recmod1_x_1_6);
         if ( v6 > 1000 )
           v6 = 1000;
-        v12 = stru_5C6E00->SinCos(v0->uYawAngle);
+        v12 = stru_5C6E00->Cos(v0->uYawAngle);
         uSectorID = v12;
         v13 = v12 * (signed __int64)v6;
         v61 = v13 >> 16;
         v0->vVelocity.x = WORD1(v13);
-        uSectorID = stru_5C6E00->SinCos(v0->uYawAngle - stru_5C6E00->uIntegerHalfPi);
+        uSectorID = stru_5C6E00->Sin(v0->uYawAngle);
         v61 = (unsigned __int64)(uSectorID * (signed __int64)v6) >> 16;
         v7 = v62 == 0;
         v0->vVelocity.y = (unsigned int)(uSectorID * v6) >> 16;
         if ( !v7 )
         {
-          v14 = stru_5C6E00->SinCos(v0->uPitchAngle - stru_5C6E00->uIntegerHalfPi);
+          v14 = stru_5C6E00->Sin(v0->uPitchAngle);
           uSectorID = v14;
           v15 = v14 * (signed __int64)v6;
           v61 = v15 >> 16;
@@ -4229,11 +4227,11 @@
                   v45 = stru_5C6E00->Atan2(
                           v0->vPosition.x - pLevelDecorations[v37].vPosition.x,
                           v0->vPosition.y - pLevelDecorations[v37].vPosition.y);
-                  v54 = stru_5C6E00->SinCos(v45);
+                  v54 = stru_5C6E00->Cos(v45);
                   v56 = (unsigned __int64)(v54 * (signed __int64)(signed int)_this) >> 16;
                   v46 = v45 - stru_5C6E00->uIntegerHalfPi;
                   v0->vVelocity.x = v54 * _this >> 16;
-                  v47 = stru_5C6E00->SinCos(v46);
+                  v47 = stru_5C6E00->Sin(v45);
                   v54 = v47;
                   v48 = v47 * (signed __int64)(signed int)_this;
                   v56 = v48 >> 16;