--- a/stru10.cpp	Tue Jun 25 11:31:22 2013 +0600
+++ b/stru10.cpp	Wed Jun 26 14:21:55 2013 +0600
@@ -680,9 +680,9 @@
               (v25.vWorldPosition.z - pBLVRenderParams->vPartyPos.z) * a1.z;
   if (fabs(_dp) < 1e-6f)
   {
-    memcpy(&v25, pOutBounding + 1, sizeof(RenderVertexSoft));
-    memcpy(pOutBounding + 1, pOutBounding + 3, sizeof(RenderVertexSoft));
-    memcpy(pOutBounding + 3, &v25, sizeof(RenderVertexSoft));
+    memcpy(&v25, &pOutBounding[1], sizeof(RenderVertexSoft));
+    memcpy(&pOutBounding[1], &pOutBounding[3], sizeof(RenderVertexSoft));
+    memcpy(&pOutBounding[3], &v25, sizeof(RenderVertexSoft));
   }
 
     //if ( byte_4D864C && pGame->uFlags & GAME_FLAGS_1_DRAW_BLV_DEBUGS)
@@ -694,10 +694,10 @@
         v26.vWorldPosition.y = pParty->vPosition.y;
         v26.vWorldPosition.z = pParty->vPosition.z + pParty->sEyelevel;             // frustum
 
-        pGame->pIndoorCameraD3D->do_draw_debug_line_sw(&v26, 0xFF0000u, pOutBounding, 0xFF0000u, 0, 0);
-        pGame->pIndoorCameraD3D->do_draw_debug_line_sw(&v26, 0xFF00u, pOutBounding + 1, 0xFF00u, 0, 0);
-        pGame->pIndoorCameraD3D->do_draw_debug_line_sw(&v26, 0xFFu, pOutBounding + 2, 0xFFu, 0, 0);
-        pGame->pIndoorCameraD3D->do_draw_debug_line_sw(&v26, 0xFFFFFFu, pOutBounding + 3, 0xFFFFFFu, 0, 0);
+        pGame->pIndoorCameraD3D->do_draw_debug_line_sw(&v26, 0xFF0000u, &pOutBounding[0], 0xFF0000u, 0, 0);
+        pGame->pIndoorCameraD3D->do_draw_debug_line_sw(&v26, 0xFF00u, &pOutBounding[1], 0xFF00u, 0, 0);
+        pGame->pIndoorCameraD3D->do_draw_debug_line_sw(&v26, 0xFFu, &pOutBounding[2], 0xFFu, 0, 0);
+        pGame->pIndoorCameraD3D->do_draw_debug_line_sw(&v26, 0xFFFFFFu, &pOutBounding[3], 0xFFFFFFu, 0, 0);
         bDoNotDrawPortalFrustum = true;
       }
       pGame->pIndoorCameraD3D->debug_outline_sw(pOutBounding, uNumVertices, 0x1EFF1Eu, 0.00019999999);    // bounding
@@ -767,7 +767,7 @@
 // 4D864C: using guessed type char byte_4D864C;
 
 //----- (0049C681) --------------------------------------------------------
-bool stru10::CalcPortalShape(BLVFace *pFace, IndoorCameraD3D_Vec4 *a3, RenderVertexSoft *pOutBounding)
+bool stru10::CalcPortalShape(BLVFace *pFace, IndoorCameraD3D_Vec4 *pPortalDataFrustum, RenderVertexSoft *pOutBounding)
 {
   RenderVertexSoft pLimits[4]; // [sp+Ch] [bp-C0h]@1
 
@@ -775,54 +775,54 @@
   //if ( byte_4D864C && pGame->uFlags & GAME_FLAGS_1_DRAW_BLV_DEBUGS)
  //   pGame->pIndoorCameraD3D->debug_outline_sw(pLimits, 4, 0xFF1E1E, 0.000099999997);
   if (CalcFaceBounding(pFace, pLimits, 4, pOutBounding))
-    return _49C720(pOutBounding, a3) != 0;
+    return _49C720(pOutBounding, pPortalDataFrustum) != 0;
   return false;
 }
 
 // 4D864C: using guessed type char byte_4D864C;
 
 //----- (0049C720) --------------------------------------------------------
-char stru10::_49C720(RenderVertexSoft *pFaceBounding, IndoorCameraD3D_Vec4 *a4)
+char stru10::_49C720(RenderVertexSoft *pFaceBounding, IndoorCameraD3D_Vec4 *pPortalDataFrustum)
 {
-  Vec3_float_ a3; // [sp+4h] [bp-34h]@1
-  a3.x = (double)pBLVRenderParams->vPartyPos.x;
-  a3.y = (double)pBLVRenderParams->vPartyPos.y;
-  a3.z = (double)pBLVRenderParams->vPartyPos.z;
+  Vec3_float_ pRayStart; // [sp+4h] [bp-34h]@1
+  pRayStart.x = (double)pBLVRenderParams->vPartyPos.x;
+  pRayStart.y = (double)pBLVRenderParams->vPartyPos.y;
+  pRayStart.z = (double)pBLVRenderParams->vPartyPos.z;
 
-  if (FindFaceNormal(pFaceBounding,     pFaceBounding + 1, &a3, a4) &&
-      FindFaceNormal(pFaceBounding + 1, pFaceBounding + 2, &a3, a4 + 1) &&
-      FindFaceNormal(pFaceBounding + 2, pFaceBounding + 3, &a3, a4 + 2) &&
-      FindFaceNormal(pFaceBounding + 3, pFaceBounding,     &a3, a4 + 3))
+  if (FindFaceNormal(&pFaceBounding[0], &pFaceBounding[1], &pRayStart, &pPortalDataFrustum[0]) &&
+      FindFaceNormal(&pFaceBounding[1], &pFaceBounding[2], &pRayStart, &pPortalDataFrustum[1]) &&
+      FindFaceNormal(&pFaceBounding[2], &pFaceBounding[3], &pRayStart, &pPortalDataFrustum[2]) &&
+      FindFaceNormal(&pFaceBounding[3], &pFaceBounding[0], &pRayStart, &pPortalDataFrustum[3]))
     return true;
   return false;
 }
 
 //----- (0049C7C5) --------------------------------------------------------
-bool stru10::FindFaceNormal(RenderVertexSoft *a1, RenderVertexSoft *a2, Vec3_float_ *a3, IndoorCameraD3D_Vec4 *a4)
+bool stru10::FindFaceNormal(RenderVertexSoft *pFaceBounding1, RenderVertexSoft *pFaceBounding2, Vec3_float_ *pRayStart, IndoorCameraD3D_Vec4 *pPortalDataFrustum)
 {
-  Vec3_float_ v1; // [sp+4h] [bp-48h]@1
-  Vec3_float_ v2; // [sp+10h] [bp-3Ch]@1
+  Vec3_float_ ray_dir; // [sp+4h] [bp-48h]@1
+  Vec3_float_ pRay2; // [sp+10h] [bp-3Ch]@1
 
-  v1.x = a1->vWorldPosition.x - a3->x;
-  v1.y = a1->vWorldPosition.y - a3->y;
-  v1.z = a1->vWorldPosition.z - a3->z;
-  Vec3_float_::Cross(&v1, &v2, a2->vWorldPosition.x - a1->vWorldPosition.x,
-                               a2->vWorldPosition.y - a1->vWorldPosition.y,
-                               a2->vWorldPosition.z - a1->vWorldPosition.z);
+  ray_dir.x = pFaceBounding1->vWorldPosition.x - pRayStart->x;//get ray for cmera to bounding1
+  ray_dir.y = pFaceBounding1->vWorldPosition.y - pRayStart->y;
+  ray_dir.z = pFaceBounding1->vWorldPosition.z - pRayStart->z;
+  Vec3_float_::Cross(&ray_dir, &pRay2, pFaceBounding2->vWorldPosition.x - pFaceBounding1->vWorldPosition.x,
+                               pFaceBounding2->vWorldPosition.y - pFaceBounding1->vWorldPosition.y,
+                               pFaceBounding2->vWorldPosition.z - pFaceBounding1->vWorldPosition.z);
 
-  float sqr_mag = v2.x * v2.x + v2.y * v2.y + v2.z * v2.z;
+  float sqr_mag = pRay2.x * pRay2.x + pRay2.y * pRay2.y + pRay2.z * pRay2.z;
   if (fabsf(sqr_mag) > 1e-6f)
   {
     float inv_mag = 1.0f / sqrtf(sqr_mag);
-    v2.x *= inv_mag;
-    v2.y *= inv_mag;
-    v2.z *= inv_mag;
-    //v2.Normalize();
+    pRay2.x *= inv_mag;
+    pRay2.y *= inv_mag;
+    pRay2.z *= inv_mag;
+    pRay2.Normalize();
 
-    a4->x = v2.x;
-    a4->y = v2.y;
-    a4->z = v2.z;
-    a4->dot = a3->z * v2.z + a3->y * v2.y + a3->x * v2.x;
+    pPortalDataFrustum->x = pRay2.x;
+    pPortalDataFrustum->y = pRay2.y;
+    pPortalDataFrustum->z = pRay2.z;
+    pPortalDataFrustum->dot = pRayStart->z * pRay2.z + pRayStart->y * pRay2.y + pRayStart->x * pRay2.x;
     return true;
   }
   return false;