--- a/Vis.cpp	Tue May 21 16:13:48 2013 +0600
+++ b/Vis.cpp	Thu May 23 11:16:46 2013 +0600
@@ -552,7 +552,7 @@
   if (pFace->Portal() || pFace->Invisible())
     return false;
 
-  int ray_dir_x = pRayEnd->vWorldPosition.x - pRayStart->vWorldPosition.x,
+  int ray_dir_x = pRayEnd->vWorldPosition.x - pRayStart->vWorldPosition.x,//calculate the direction vector of the line(вычислим вектор направления линий)
       ray_dir_y = pRayEnd->vWorldPosition.y - pRayStart->vWorldPosition.y,
       ray_dir_z = pRayEnd->vWorldPosition.z - pRayStart->vWorldPosition.z;
 
@@ -565,20 +565,20 @@
   #define EPSILON 1e-6
 
 //c2 = n*u
-  c2 = pFace->pFacePlane.vNormal.x * ray_dir_y
+  c2 = pFace->pFacePlane.vNormal.x * ray_dir_y// get length of the line(Это дает нам длину линии)
        + pFace->pFacePlane.vNormal.y * ray_dir_x 
        + pFace->pFacePlane.vNormal.z * ray_dir_z;
   if (c2 > -EPSILON && c2 < EPSILON)   // ray faces face's normal ( > 0) or parallel ( == 0)
     return false;
 
 //t = -d-(n*p0)/n*u
-  float t = c1 / c2;
+  float t = c1 / c2;//How far is crossing the line in percent for 0 to 1(Как далеко пересечение линии в процентах от 0 до 1 )
 
   if (t < 0 || t > 1)
     return false;
 
 // p(t) = p0 + tu;
-  Intersection->vWorldPosition.x = pRayStart->vWorldPosition.x + t * ray_dir_y;
+  Intersection->vWorldPosition.x = pRayStart->vWorldPosition.x + t * ray_dir_y;// add the interest to the start line(прибавляем процент линии к линии старта)
   Intersection->vWorldPosition.y = pRayStart->vWorldPosition.y + t * ray_dir_x;
   Intersection->vWorldPosition.z = pRayStart->vWorldPosition.z + t * ray_dir_z;
 
@@ -586,22 +586,22 @@
   IntersectPoint.y = (signed __int64)Intersection->vWorldPosition.y;
   IntersectPoint.z = (signed __int64)Intersection->vWorldPosition.z;
         
-  if ( !_4C1D2B(pFace, IntersectPoint, pBModelID) )
+  if ( !IntersectBModel_sub(pFace, IntersectPoint, pBModelID) )
     return false;
 
-  //*pDepth = t;
+  *pDepth = t;//Record the distance from the origin of the ray (Записываем дистанцию от начала луча )
   return true;
 }
 
 //----- (004C1D2B) --------------------------------------------------------
-bool Vis::_4C1D2B(BLVFace *pFace, Vec3_short_ a2, unsigned int uModelID)
+bool Vis::IntersectBModel_sub(BLVFace *pFace, Vec3_short_ IntersectPoint, unsigned int uModelID)
 {
   //BLVFace *v4; // esi@1
   int v5; // esi@10
   bool v6; // edi@10
-  int v7; // ecx@12
-  signed int v8; // edx@12
-  signed int v9; // eax@13
+  //int v7; // ecx@12
+  //signed int v8; // edx@12
+  //signed int v9; // eax@13
   signed int v10; // ebx@14
   int v11; // edi@16
   signed int v12; // ST28_4@18
@@ -610,67 +610,55 @@
   int v15; // [sp+10h] [bp-Ch]@10
   signed int v16; // [sp+18h] [bp-4h]@10
 
-  //v4 = pFace;
-  if (a2.x < pFace->pBounding.x1 || a2.x > pFace->pBounding.x2 ||
-      a2.y < pFace->pBounding.y1 || a2.y > pFace->pBounding.y2 ||
-      a2.z < pFace->pBounding.z1 || a2.z > pFace->pBounding.z2 )
+  if (IntersectPoint.x < pFace->pBounding.x1 || IntersectPoint.x > pFace->pBounding.x2 ||
+      IntersectPoint.y < pFace->pBounding.y1 || IntersectPoint.y > pFace->pBounding.y2 ||
+      IntersectPoint.z < pFace->pBounding.z1 || IntersectPoint.z > pFace->pBounding.z2 )
     return false;
 
   pFace->uAttributes |= 0x80000000;
   return true;
   if (uModelID != -1)
-    _4C2186_BLV_IntersectBModel(pFace, uModelID,
-                                word_F8BC48_displaced_face_intersect_plane_coords_a,
-                                word_F8BD18_displaced_face_intersect_plane_coords_b,
-                                &a2, pFace, uModelID);
+    _4C2186_BLV_IntersectBModel(pFace, uModelID, word_F8BC48_displaced_face_intersect_plane_coords_a,
+                                word_F8BD18_displaced_face_intersect_plane_coords_b, &IntersectPoint, pFace, uModelID);
   else
-    _4C1EE5_BLV_IntersectBModel_2((int *)&pFace, (int *)&uModelID,
-                                  word_F8BC48_displaced_face_intersect_plane_coords_a,
-                                  word_F8BD18_displaced_face_intersect_plane_coords_b,
-                                  &a2, pFace);
+    _4C1EE5_BLV_IntersectBModel_2((int *)&pFace, (int *)&uModelID, word_F8BC48_displaced_face_intersect_plane_coords_a,
+                                  word_F8BD18_displaced_face_intersect_plane_coords_b, &IntersectPoint, pFace);
   
   v5 = 2 * pFace->uNumVertices;
   v16 = 0;
   word_F8BC48_displaced_face_intersect_plane_coords_a[v5] = word_F8BC48_displaced_face_intersect_plane_coords_a[0];
   word_F8BD18_displaced_face_intersect_plane_coords_b[v5] = word_F8BD18_displaced_face_intersect_plane_coords_b[0];
-  v15 = 0;
   v6 = word_F8BD18_displaced_face_intersect_plane_coords_b[0] >= (signed int)uModelID;
   if (v5 <= 0)
     return false;
 
-  do
+  for ( v15 = 0; v15 < v5; ++v15 )
   {
     if ( v16 >= 2 )
       break;
-    v7 = 2 * v15;
-    v8 = word_F8BD18_displaced_face_intersect_plane_coords_b[ + v15 + 1];
-    if ( v6 ^ v8 >= (signed int)uModelID )
+    if ( v6 ^ word_F8BD18_displaced_face_intersect_plane_coords_b[v15 + 1] >= (signed int)uModelID )
     {
-      v9 = word_F8BC48_displaced_face_intersect_plane_coords_a[v7/2 + 1];
-      if ( v9 >= (signed int)pFace )
+      if ( word_F8BC48_displaced_face_intersect_plane_coords_a[v15 + 1] >= (signed int)pFace )
         v10 = 0;
       else
         v10 = 2;
-      v11 = v10 | word_F8BC48_displaced_face_intersect_plane_coords_a[v7/2] < (signed int)pFace;
+      v11 = v10 | word_F8BC48_displaced_face_intersect_plane_coords_a[v15] < (signed int)pFace;
       if ( v11 != 3 )
       {
         if ( !v11
-          || (v12 = v9 - word_F8BC48_displaced_face_intersect_plane_coords_a[v7/2],
+          || (v12 = word_F8BC48_displaced_face_intersect_plane_coords_a[v15 + 1] - word_F8BC48_displaced_face_intersect_plane_coords_a[v15],
               LODWORD(v13) = v12 << 16,
               HIDWORD(v13) = v12 >> 16,
-              word_F8BC48_displaced_face_intersect_plane_coords_a[v7/2]
-            + ((signed int)(((unsigned __int64)(v13 / (v8 - word_F8BD18_displaced_face_intersect_plane_coords_b[v7/2])
-                                              * (signed int)((uModelID - word_F8BD18_displaced_face_intersect_plane_coords_b[v7/2]) << 16)) >> 16) + 32768) >> 16) >= (signed int)pFace) )
+              word_F8BC48_displaced_face_intersect_plane_coords_a[v15]
+            + ((signed int)(((unsigned __int64)(v13 / (word_F8BD18_displaced_face_intersect_plane_coords_b[v15 + 1] - word_F8BD18_displaced_face_intersect_plane_coords_b[v15])
+                                              * (signed int)((uModelID - word_F8BD18_displaced_face_intersect_plane_coords_b[v15]) << 16)) >> 16) + 32768) >> 16) >= (signed int)pFace) )
           ++v16;
       }
     }
-    ++v15;
-    v6 = v8 >= (signed int)uModelID;
+    v6 = word_F8BD18_displaced_face_intersect_plane_coords_b[v15 + 1] >= (signed int)uModelID;
   }
-  while ( v15 < v5 );
   result = 1;
   if ( v16 != 1 )
-LABEL_25:
     result = 0;
   return result;
 }
@@ -776,7 +764,7 @@
 }
 
 //----- (004C2186) --------------------------------------------------------
-bool Vis::_4C2186_BLV_IntersectBModel(BLVFace *pFace, unsigned int ModelID, __int16 *displaced_face_intersect_plane_coords_a, __int16 *displaced_face_intersect_plane_coords_b, Vec3_short_ *a5, BLVFace *face, unsigned int uModelID)
+bool Vis::_4C2186_BLV_IntersectBModel(BLVFace *pFace, unsigned int ModelID, __int16 *displaced_face_intersect_plane_coords_a, __int16 *displaced_face_intersect_plane_coords_b, Vec3_short_ *IntersectPoint, BLVFace *face, unsigned int uModelID)
 {
   bool result; // eax@1
   //int *v9; // esi@1
@@ -804,8 +792,8 @@
   //a1a = 0;
   if ( BYTE1(pFace->uAttributes) & 1 )
   {
-    pFace->pFacePlane.vNormal.x = a5->x;
-    pFace->pFacePlane.vNormal.y = a5->y;
+    pFace->pFacePlane.vNormal.x = IntersectPoint->x;
+    pFace->pFacePlane.vNormal.y = IntersectPoint->y;
     if ( pFace->uNumVertices )
     {
       //v11 = 188 * ModelID + 72;
@@ -827,8 +815,8 @@
   {
     if ( BYTE1(pFace->uAttributes) & 2 )
     {
-      pFace->pFacePlane.vNormal.x = a5->x;
-      pFace->pFacePlane.vNormal.z = a5->z;
+      pFace->pFacePlane.vNormal.x = IntersectPoint->x;
+      pFace->pFacePlane.vNormal.z = IntersectPoint->z;
       if ( pFace->uNumVertices )
       {
         v15 = 188 * uModelID + 72;
@@ -836,7 +824,7 @@
         for ( uint i = 0; i < pFace->uNumVertices; ++i )
         {
           displaced_face_intersect_plane_coords_a[2 * i] = pFace->pXInterceptDisplacements[i] + pOutdoor->pBModels[uModelID].pVertices.pVertices[pFace->pVertexIDs[i]].x;
-          *(a5b - 1) = pFace->pZInterceptDisplacements[i] + pOutdoor->pBModels[uModelID].pVertices.pVertices[pFace->pVertexIDs[i]].y;
+          displaced_face_intersect_plane_coords_b[2 * i] = pFace->pZInterceptDisplacements[i] + pOutdoor->pBModels[uModelID].pVertices.pVertices[pFace->pVertexIDs[i]].y;
           *(__int16 *)((char *)a5b + (int)displaced_face_intersect_plane_coords_a - (int)displaced_face_intersect_plane_coords_b) = pFace->pXInterceptDisplacements[i + 1]
                 + pOutdoor->pBModels[uModelID].pVertices.pVertices[pFace->pVertexIDs[i + 1]].x;
           v17 = pFace->pZInterceptDisplacements[i + 1] + pOutdoor->pBModels[uModelID].pVertices.pVertices[pFace->pVertexIDs[i + 1]].z;
@@ -848,8 +836,8 @@
     }
     else
     {
-      pFace->pFacePlane.vNormal.y = a5->y;
-      pFace->pFacePlane.vNormal.z = a5->z;
+      pFace->pFacePlane.vNormal.y = IntersectPoint->y;
+      pFace->pFacePlane.vNormal.z = IntersectPoint->z;
       if ( pFace->uNumVertices )
       {
         v19 = 188 * uModelID + 72;
@@ -857,7 +845,7 @@
         for ( uint i = 0; i < pFace->uNumVertices; ++i )
         {
           displaced_face_intersect_plane_coords_a[2 * i] = pFace->pYInterceptDisplacements[i] + pOutdoor->pBModels[uModelID].pVertices.pVertices[pFace->pVertexIDs[i]].y;
-          *(a5c - 1) = pFace->pZInterceptDisplacements[i] + pOutdoor->pBModels[uModelID].pVertices.pVertices[pFace->pVertexIDs[i]].z;
+          displaced_face_intersect_plane_coords_b[2 * i] = pFace->pZInterceptDisplacements[i] + pOutdoor->pBModels[uModelID].pVertices.pVertices[pFace->pVertexIDs[i]].z;
           *(__int16 *)((char *)a5c + (int)(char *)displaced_face_intersect_plane_coords_a - (char *)displaced_face_intersect_plane_coords_b) = pFace->pYInterceptDisplacements[i + 1]
                 + pOutdoor->pBModels[uModelID].pVertices.pVertices[pFace->pVertexIDs[i + 1]].y;
           v21 = pFace->pZInterceptDisplacements[i + 1] + pOutdoor->pBModels[uModelID].pVertices.pVertices[pFace->pVertexIDs[i + 1]].z;