--- a/Indoor.cpp	Sat Sep 07 13:26:15 2013 +0200
+++ b/Indoor.cpp	Sat Sep 07 15:20:57 2013 +0200
@@ -4828,11 +4828,12 @@
               }
               else
               {
-                LODWORD(v19) = pBLVRenderParams->field_40 << 16;
+                __debugbreak(); // sw rendering
+                /*LODWORD(v19) = pBLVRenderParams->field_40 << 16;
                 HIDWORD(v19) = pBLVRenderParams->field_40 >> 16;
                 v20 = v19 / x;
                 v3->_screenspace_x_scaler_packedfloat = (unsigned __int64)(v24->scale * v19 / x) >> 16;
-                v31 = (unsigned __int64)(v24->scale * (signed __int64)v20) >> 16;
+                v31 = (unsigned __int64)(v24->scale * (signed __int64)v20) >> 16;*/
               }
               //HIWORD(v21) = HIWORD(x);
               //LOWORD(v21) = 0;
@@ -4942,7 +4943,7 @@
   }
 }
 //----- (0043FA33) --------------------------------------------------------
-void __fastcall PrepareDecorationsRenderList_BLV(unsigned int uDecorationID, unsigned int uSectorID)
+void PrepareDecorationsRenderList_BLV(unsigned int uDecorationID, unsigned int uSectorID)
 {
   LevelDecoration *v2; // esi@1
   DecorationDesc *v3; // ebx@2
@@ -5152,113 +5153,97 @@
   }
 }
 //----- (0048653D) --------------------------------------------------------
-int stru149::_48653D(int a2, int a3, int a4, int a5, int a6, int a7)//portal frustum culling
+void stru149::_48653D_frustum_blv(int a2, int a3, int a4, int a5, int a6, int a7)//portal frustum culling
 {
-  stru149 *v7; // esi@1
+  //stru149 *v7; // esi@1
   int v8; // edi@1
   int v9; // eax@1
   //int v10; // edx@1
   //int v11; // ecx@1
-  int v12; // eax@1
-  int v13; // ebx@2
-  int v14; // ecx@2
-  int v15; // eax@2
+  //int v12; // eax@1
+  //int v13; // ebx@2
+  //int v14; // ecx@2
+  //int v15; // eax@2
   int v16; // ST14_4@3
   int v17; // ST10_4@3
-  int v18; // eax@5
+  //int v18; // eax@5
   int v19; // ST10_4@6
-  int v20; // eax@8
+  //int v20; // eax@8
   int v21; // ST10_4@9
-  int v22; // eax@10
-  int v23; // ecx@10
-  int v24; // eax@10
-  int result; // eax@10
+  //int v22; // eax@10
+  //int v23; // ecx@10
+  //int v24; // eax@10
+  //int result; // eax@10
   //int v26; // [sp+14h] [bp-14h]@1
-  int v27; // [sp+18h] [bp-10h]@1
+  //int v27; // [sp+18h] [bp-10h]@1
   int v28; // [sp+1Ch] [bp-Ch]@1
   int v29; // [sp+24h] [bp-4h]@1
-  int v30; // [sp+30h] [bp+8h]@10
-  int v31; // [sp+3Ch] [bp+14h]@10
-
-  v7 = this;
+  //int v30; // [sp+30h] [bp+8h]@10
+  //int v31; // [sp+3Ch] [bp+14h]@10
+
   v8 = stru_5C6E00->Cos(pBLVRenderParams->sPartyRotY);
   v29 = stru_5C6E00->Sin(pBLVRenderParams->sPartyRotY);
   v28 = stru_5C6E00->Cos(pBLVRenderParams->sPartyRotX);
   v9 = stru_5C6E00->Sin(pBLVRenderParams->sPartyRotX);
   //v11 = -pBLVRenderParams->vPartyPos.y;
   //v26 = -pBLVRenderParams->vPartyPos.x;
-  v27 = v9;
-  v12 = -pBLVRenderParams->vPartyPos.z;
+  //v27 = v9;
+  //v12 = -pBLVRenderParams->vPartyPos.z;
   if ( pBLVRenderParams->sPartyRotX )
   {
     v16 = v8 * -pBLVRenderParams->vPartyPos.x + v29 * -pBLVRenderParams->vPartyPos.y;
-    v13 = v28;
     v17 = -65536 * pBLVRenderParams->vPartyPos.z;
-    v7->field_0_party_dir_x = ((unsigned __int64)(v16 * (signed __int64)v28) >> 16)
-                + ((unsigned __int64)(-65536 * pBLVRenderParams->vPartyPos.z * (signed __int64)v27) >> 16);
-    v7->field_4_party_dir_y = v8 * -pBLVRenderParams->vPartyPos.y - v29 * -pBLVRenderParams->vPartyPos.x;
-    v14 = v27;
-    v15 = ((unsigned __int64)(v17 * (signed __int64)v28) >> 16) - ((unsigned __int64)(v16 * (signed __int64)v27) >> 16);
+    this->field_0_party_dir_x = fixpoint_sub0(v16, v28) + fixpoint_sub0((-pBLVRenderParams->vPartyPos.z) << 16, v9);
+    this->field_4_party_dir_y = v8 * -pBLVRenderParams->vPartyPos.y - v29 * -pBLVRenderParams->vPartyPos.x;
+    this->field_8_party_dir_z = fixpoint_sub0(v17, v28) - fixpoint_sub0(v16, v9);
   }
   else
   {
-    v7->field_0_party_dir_x = v8 * -pBLVRenderParams->vPartyPos.x + v29 * -pBLVRenderParams->vPartyPos.y;
-    v13 = v28;
-    v7->field_4_party_dir_y = v8 * -pBLVRenderParams->vPartyPos.y - v29 * -pBLVRenderParams->vPartyPos.x;
-    v14 = v27;
-    v15 = v12 << 16;
+    this->field_0_party_dir_x = v8 * -pBLVRenderParams->vPartyPos.x + v29 * -pBLVRenderParams->vPartyPos.y;
+    this->field_4_party_dir_y = v8 * -pBLVRenderParams->vPartyPos.y - v29 * -pBLVRenderParams->vPartyPos.x;
+    this->field_8_party_dir_z = (-pBLVRenderParams->vPartyPos.z) << 16;
   }
-  v7->field_8 = v15;
-  if ( pBLVRenderParams->sPartyRotX )
+
+  if (pBLVRenderParams->sPartyRotX)
   {
-    v19 = ((unsigned __int64)(a2 * (signed __int64)v8) >> 16) + ((unsigned __int64)(a3 * (signed __int64)v29) >> 16);
-    v7->field_C = ((unsigned __int64)(v19 * (signed __int64)v13) >> 16)
-                + ((unsigned __int64)(a4 * (signed __int64)v14) >> 16);
-    v7->field_10 = ((unsigned __int64)(a3 * (signed __int64)v8) >> 16)
-                 - ((unsigned __int64)(a2 * (signed __int64)v29) >> 16);
-    v18 = ((unsigned __int64)(a4 * (signed __int64)v13) >> 16) - ((unsigned __int64)(v19 * (signed __int64)v14) >> 16);
+    v19 = fixpoint_sub0(a2, v8) + fixpoint_sub0(a3, v29);
+
+    this->field_C = fixpoint_sub0(v19, v28) + fixpoint_sub0(a4, v9);
+    this->field_10 = fixpoint_sub0(a3, v8) - fixpoint_sub0(a2, v29);
+    this->field_14 = fixpoint_sub0(a4, v28) - fixpoint_sub0(v19, v9);
   }
   else
   {
-    v7->field_C = ((unsigned __int64)(a2 * (signed __int64)v8) >> 16)
-                + ((unsigned __int64)(a3 * (signed __int64)v29) >> 16);
-    v7->field_10 = ((unsigned __int64)(a3 * (signed __int64)v8) >> 16)
-                 - ((unsigned __int64)(a2 * (signed __int64)v29) >> 16);
-    v18 = a4;
+    this->field_C = fixpoint_sub0(a2, v8) + fixpoint_sub0(a3, v29);
+    this->field_10 = fixpoint_sub0(a3, v8) - fixpoint_sub0(a2, v29);
+    this->field_14 = a4;
   }
-  v7->field_14 = v18;
-  if ( pBLVRenderParams->sPartyRotX )
+
+  if (pBLVRenderParams->sPartyRotX)
   {
-    v21 = ((unsigned __int64)(a5 * (signed __int64)v8) >> 16) + ((unsigned __int64)(a6 * (signed __int64)v29) >> 16);
-    v7->field_18 = ((unsigned __int64)(v21 * (signed __int64)v13) >> 16)
-                 + ((unsigned __int64)(a7 * (signed __int64)v14) >> 16);
-    v7->field_1C = ((unsigned __int64)(a6 * (signed __int64)v8) >> 16)
-                 - ((unsigned __int64)(a5 * (signed __int64)v29) >> 16);
-    v20 = ((unsigned __int64)(a7 * (signed __int64)v13) >> 16) - ((unsigned __int64)(v21 * (signed __int64)v14) >> 16);
+    v21 = fixpoint_sub0(a5, v8) + fixpoint_sub0(a6, v29);
+
+    this->field_18 = fixpoint_sub0(v21, v28) + fixpoint_sub0(a7, v9);
+    this->field_1C = fixpoint_sub0(a6, v8) - fixpoint_sub0(a5, v29);
+    this->field_20 = fixpoint_sub0(a7, v28) - fixpoint_sub0(v21, v9);
   }
   else
   {
-    v7->field_18 = ((unsigned __int64)(a5 * (signed __int64)v8) >> 16)
-                 + ((unsigned __int64)(a6 * (signed __int64)v29) >> 16);
-    v7->field_1C = ((unsigned __int64)(a6 * (signed __int64)v8) >> 16)
-                 - ((unsigned __int64)(a5 * (signed __int64)v29) >> 16);
-    v20 = a7;
+    this->field_18 = fixpoint_sub0(a5, v8) + fixpoint_sub0(a6, v29);
+    this->field_1C = fixpoint_sub0(a6, v8) - fixpoint_sub0(a5, v29);
+    this->field_20 = a7;
   }
-  v7->field_18 = -v7->field_18;
-  v7->field_1C = -v7->field_1C;
-  v7->field_20 = v20;
-  v22 = v7->field_C;
-  v7->field_20 = -v7->field_20;
-  v23 = ((unsigned __int64)(v22 * (signed __int64)v7->field_0_party_dir_x) >> 16)
-      + ((unsigned __int64)(v7->field_10 * (signed __int64)v7->field_4_party_dir_y) >> 16)
-      + ((unsigned __int64)(v7->field_14 * (signed __int64)v7->field_8) >> 16);
-  v30 = v7->field_18;
-  v24 = v7->field_0_party_dir_x;
-  v7->field_24 = v23;
-  v31 = (unsigned __int64)(v30 * (signed __int64)v24) >> 16;
-  result = (unsigned __int64)(v7->field_1C * (signed __int64)v7->field_4_party_dir_y) >> 16;
-  v7->field_28 = v31 + result + ((unsigned __int64)(v7->field_20 * (signed __int64)v7->field_8) >> 16);
-  return result;
+
+  this->field_18 = -this->field_18;
+  this->field_1C = -this->field_1C;
+  this->field_20 = -this->field_20;
+
+  this->field_24 = fixpoint_dot(this->field_C,  this->field_0_party_dir_x,
+                                this->field_10, this->field_4_party_dir_y,
+                                this->field_14, this->field_8_party_dir_z);
+  this->field_28 = fixpoint_dot(this->field_18, this->field_0_party_dir_x,
+                                this->field_1C, this->field_4_party_dir_y,
+                                this->field_20, this->field_8_party_dir_z);
 }
 //----- (00407A1C) --------------------------------------------------------
 bool __fastcall sub_407A1C(int x, int z, int y, Vec3_int_ v)
@@ -5373,7 +5358,7 @@
   int v112; // [sp+18h] [bp-64h]@128
   signed int v113; // [sp+20h] [bp-5Ch]@1
   signed int v114; // [sp+24h] [bp-58h]@1
-  unsigned __int64 a4; // [sp+28h] [bp-54h]@1
+  //unsigned __int64 a4; // [sp+28h] [bp-54h]@1
   unsigned int a4_8; // [sp+30h] [bp-4Ch]@1
   int v117; // [sp+34h] [bp-48h]@4
   int v118; // [sp+34h] [bp-48h]@39
@@ -5442,13 +5427,13 @@
 
   __debugbreak();
 
-  a4 = __PAIR__(z, x);
   v4 = stru_5C6E00->Atan2(v.x - x, v.y - z);
   v114 = 0;
   v97.z = y;
+  v97.x = x;
+  v97.y = z;
   v113 = 0;
   a4_8 = v4;
-  *(_QWORD *)&v97.x = a4;
   if ( uCurrentlyLoadedLevelType != LEVEL_Outdoor)
   {
     Vec3_int_::Rotate(32, stru_5C6E00->uIntegerHalfPi + v4, 0, v97, &pOut.x, &pOut.y, &outz);
@@ -5602,10 +5587,12 @@
       v54 = pOut.x;
     }
     v72.z = y;
-    *(_QWORD *)&v72.x = a4;
+    v72.x = x;
+    v72.y = z;
     Vec3_int_::Rotate(32, a4_8 - stru_5C6E00->uIntegerHalfPi, 0, v72, &pOut.x, &pOut.y, &outz);
     v73.z = v.z;
-    *(_QWORD *)&v73.x = *(_QWORD *)&v;
+    v73.x = v.x;
+    v73.y = v.y;
     Vec3_int_::Rotate(32, a4_8 - stru_5C6E00->uIntegerHalfPi, 0, v73, &outx, &outy, &v163);
     v74 = outy - pOut.y;
     v75 = v163 - outz;
@@ -5892,10 +5879,12 @@
   }
 LABEL_37:
   v27.z = y;
-  *(_QWORD *)&v27.x = a4;
+  v27.x = x;
+  v27.y = z;
   Vec3_int_::Rotate(32, a4_8 - stru_5C6E00->uIntegerHalfPi, 0, v27, &pOut.x, &pOut.y, &outz);
   v28.z = v.z;
-  *(_QWORD *)&v28.x = *(_QWORD *)&v;
+  v28.x = v.x;
+  v28.y = v.y;
   Vec3_int_::Rotate(32, a4_8 - stru_5C6E00->uIntegerHalfPi, 0, v28, &outx, &outy, &v163);
   v29 = outy - pOut.y;
   v30 = v163 - outz;