Mercurial > mm7

changeset 1646:bac69d9157b6

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Merge
author Nomad
date Tue, 17 Sep 2013 23:10:07 +0200
parents 07fe868f0b44 (current diff) 7182930263b3 (diff)
children b0a2b8525483 42055a4bd550
files mm7_3.cpp
diffstat 12 files changed, 222 insertions(+), 231 deletions(-) [+]
line wrap: on
line diff
--- a/Actor.cpp	Tue Sep 17 22:10:06 2013 +0200
+++ b/Actor.cpp	Tue Sep 17 23:10:07 2013 +0200
@@ -3144,8 +3144,8 @@
     v18 = -16;
 
   v7->uYawAngle = stru_5C6E00->Atan2(
-                    pParty->vPosition.x + fixpoint_sub0(stru_5C6E00->Cos(v18 + stru_5C6E00->uIntegerPi + v10->uYawAngle), v10->uDistanceXZ) - v7->vPosition.x,
-                    pParty->vPosition.y + fixpoint_sub0(stru_5C6E00->Sin(v18 + stru_5C6E00->uIntegerPi + v10->uYawAngle), v10->uDistanceXZ) - v7->vPosition.y);
+                    pParty->vPosition.x + fixpoint_mul(stru_5C6E00->Cos(v18 + stru_5C6E00->uIntegerPi + v10->uYawAngle), v10->uDistanceXZ) - v7->vPosition.x,
+                    pParty->vPosition.y + fixpoint_mul(stru_5C6E00->Sin(v18 + stru_5C6E00->uIntegerPi + v10->uYawAngle), v10->uDistanceXZ) - v7->vPosition.y);
   if ( uActionLength )
     v7->uCurrentActionLength = uActionLength;
   else
--- a/CastSpellInfo.cpp	Tue Sep 17 22:10:06 2013 +0200
+++ b/CastSpellInfo.cpp	Tue Sep 17 23:10:07 2013 +0200
@@ -1349,9 +1349,9 @@
 			else
 			{
 				v155 = stru_5C6E00->Cos(pParty->sRotationY);
-				uRequiredMana = pParty->vPosition.x + fixpoint_sub0(2048, v155);
+				uRequiredMana = pParty->vPosition.x + fixpoint_mul(2048, v155);
 				v156 = stru_5C6E00->Sin(pParty->sRotationY);
-				LODWORD(v727) = pParty->vPosition.y + fixpoint_sub0(2048, v156);
+				LODWORD(v727) = pParty->vPosition.y + fixpoint_mul(2048, v156);
 				v154 = pParty->vPosition.z;
 			}
 			unsigned __int64 k = 0;
@@ -1656,9 +1656,9 @@
 			else
 			{
 				v212 = stru_5C6E00->Cos(pParty->sRotationY);
-				LODWORD(v718) = pParty->vPosition.x + fixpoint_sub0(2048, v212);
+				LODWORD(v718) = pParty->vPosition.x + fixpoint_mul(2048, v212);
 				v213 = stru_5C6E00->Sin(pParty->sRotationY);
-				v214 = fixpoint_sub0(2048, v213);
+				v214 = fixpoint_mul(2048, v213);
 				v211 = pParty->vPosition.z;
 				v713 = pParty->vPosition.y + v214;
 				v208 = LODWORD(v725);
--- a/Indoor.cpp	Tue Sep 17 22:10:06 2013 +0200
+++ b/Indoor.cpp	Tue Sep 17 23:10:07 2013 +0200
@@ -397,8 +397,8 @@
 
   _this.field_0_timer = pEventTimer->uTotalGameTimeElapsed;
   //_this.fov_deg = 65;
-  //_this.vPosition.x = pParty->vPosition.x - fixpoint_sub0(stru_5C6E00->Cos(pParty->sRotationY), pParty->y_rotation_granularity);
-  //_this.vPosition.y = pParty->vPosition.y - fixpoint_sub0(stru_5C6E00->Sin(pParty->sRotationY), pParty->y_rotation_granularity);
+  //_this.vPosition.x = pParty->vPosition.x - fixpoint_mul(stru_5C6E00->Cos(pParty->sRotationY), pParty->y_rotation_granularity);
+  //_this.vPosition.y = pParty->vPosition.y - fixpoint_mul(stru_5C6E00->Sin(pParty->sRotationY), pParty->y_rotation_granularity);
   //_this.vPosition.z = pParty->vPosition.z + pParty->sEyelevel;
   //_this.sRotationX = pParty->sRotationX;
   //_this.sRotationY = pParty->sRotationY;
@@ -2573,16 +2573,16 @@
                         HIDWORD(v33) = v32 >> 16;*/
                         //fixpoint_div(v1->x - v2->x, v1->y - v2->y);
                         //_a58 = v33 / (v1->y - v2->y);
-                        //_a59 = fixpoint_sub0(_a58, sY - v2->y);
+                        //_a59 = fixpoint_mul(_a58, sY - v2->y);
             auto x_div_y = fixpoint_div(v1->x - v2->x, v1->y - v2->y);
-            auto res = fixpoint_sub0(x_div_y, sY - v2->y);  // a / b * c  - looks like projection 
+            auto res = fixpoint_mul(x_div_y, sY - v2->y);  // a / b * c  - looks like projection 
             if (res + v2->x > sX)
               ++v54;
           }
           else
           {
             auto x_div_y = fixpoint_div(v2->x - v1->x, v2->y - v1->y);
-            auto res = fixpoint_sub0(x_div_y, sY - v1->y);
+            auto res = fixpoint_mul(x_div_y, sY - v1->y);
 
             if (res + v1->x > sX)
               ++v54;
@@ -2593,7 +2593,7 @@
                         LODWORD(v33) = v32 << 16;
                         HIDWORD(v33) = v32 >> 16;
                         _a58 = v33 / (v2->y - v1->y);
-                        _a59 = fixpoint_sub0(_a58, sY - v1->y);
+                        _a59 = fixpoint_mul(_a58, sY - v1->y);
 
                         if (_a59 + pVertices[k].x > sX)
                           ++v54;*/
@@ -3445,9 +3445,9 @@
         }
         else
         {
-          v30 = v0->vPosition.x + fixpoint_sub0(stru_721530.field_7C, stru_721530.direction.x);
-          v31 = v0->vPosition.y + fixpoint_sub0(stru_721530.field_7C, stru_721530.direction.y);
-          v32 = v0->vPosition.z + fixpoint_sub0(stru_721530.field_7C, stru_721530.direction.z);
+          v30 = v0->vPosition.x + fixpoint_mul(stru_721530.field_7C, stru_721530.direction.x);
+          v31 = v0->vPosition.y + fixpoint_mul(stru_721530.field_7C, stru_721530.direction.y);
+          v32 = v0->vPosition.z + fixpoint_mul(stru_721530.field_7C, stru_721530.direction.z);
         }
         v33 = collide_against_floor(v30, v31, v32, &stru_721530.uSectorID, &uFaceID);
         v34 = pIndoor->pFaces[uFaceID].uAttributes;
@@ -3472,12 +3472,12 @@
               goto LABEL_123;
             }
             //v58 = (unsigned __int64)(stru_721530.field_7C * (signed __int64)stru_721530.direction.x) >> 16;
-            v0->vPosition.x += fixpoint_sub0(stru_721530.field_7C, stru_721530.direction.x);
+            v0->vPosition.x += fixpoint_mul(stru_721530.field_7C, stru_721530.direction.x);
             //v58 = (unsigned __int64)(stru_721530.field_7C * (signed __int64)stru_721530.direction.y) >> 16;
-            v0->vPosition.y += fixpoint_sub0(stru_721530.field_7C, stru_721530.direction.y);
+            v0->vPosition.y += fixpoint_mul(stru_721530.field_7C, stru_721530.direction.y);
             //v58 = (unsigned __int64)(stru_721530.field_7C * (signed __int64)stru_721530.direction.z) >> 16;
             v36 = stru_721530.uFaceID;
-            v0->vPosition.z += fixpoint_sub0(stru_721530.field_7C, stru_721530.direction.z);
+            v0->vPosition.z += fixpoint_mul(stru_721530.field_7C, stru_721530.direction.z);
             v0->uSectorID = LOWORD(stru_721530.uSectorID);
             stru_721530.field_70 += stru_721530.field_7C;
             v37 = PID_ID(v36);
@@ -3491,8 +3491,8 @@
                   v45 = stru_5C6E00->Atan2(
                           v0->vPosition.x - pLevelDecorations[v37].vPosition.x,
                           v0->vPosition.y - pLevelDecorations[v37].vPosition.y);
-                  v0->vVelocity.x = fixpoint_sub0(stru_5C6E00->Cos(v45), _this);
-                  v0->vVelocity.y = fixpoint_sub0(stru_5C6E00->Sin(v45), _this);
+                  v0->vVelocity.x = fixpoint_mul(stru_5C6E00->Cos(v45), _this);
+                  v0->vVelocity.y = fixpoint_mul(stru_5C6E00->Sin(v45), _this);
                   goto LABEL_119;
                 }
                 if ( PID_TYPE(v36) == OBJECT_BModel)
@@ -3521,9 +3521,9 @@
                     if ( (stru_721530.speed >> 3) > v61 )
                       v61 = stru_721530.speed >> 3;
 
-                    v0->vVelocity.x += fixpoint_sub0(v61, v38->pFacePlane_old.vNormal.x);
-                    v0->vVelocity.y += fixpoint_sub0(v61, v38->pFacePlane_old.vNormal.y);
-                    v0->vVelocity.z += fixpoint_sub0(v61, v38->pFacePlane_old.vNormal.z);
+                    v0->vVelocity.x += fixpoint_mul(v61, v38->pFacePlane_old.vNormal.x);
+                    v0->vVelocity.y += fixpoint_mul(v61, v38->pFacePlane_old.vNormal.y);
+                    v0->vVelocity.z += fixpoint_mul(v61, v38->pFacePlane_old.vNormal.z);
                     v41 = v38->uPolygonType;
                     if ( v41 != 4 && v41 != 3 )
                     {
@@ -3547,9 +3547,9 @@
                     EventProcessor(pIndoor->pFaceExtras[v38->uFaceExtraID].uEventID, 0, 1);
                 }
 LABEL_119:
-                v0->vVelocity.x = fixpoint_sub0(58500, v0->vVelocity.x);
-                v0->vVelocity.y = fixpoint_sub0(58500, v0->vVelocity.y);
-                v0->vVelocity.z = fixpoint_sub0(58500, v0->vVelocity.z);
+                v0->vVelocity.x = fixpoint_mul(58500, v0->vVelocity.x);
+                v0->vVelocity.y = fixpoint_mul(58500, v0->vVelocity.y);
+                v0->vVelocity.z = fixpoint_mul(58500, v0->vVelocity.z);
                 v22 = 0;
                 goto LABEL_120;
               }
@@ -4070,7 +4070,7 @@
           else
           {
             auto a_div_b = fixpoint_div(y - word_721390_ys[j], word_721390_ys[j + 1] - word_721390_ys[j]);
-            auto res = fixpoint_sub0((signed int)word_721460_xs[j + 1] - (signed int)word_721460_xs[j], a_div_b);
+            auto res = fixpoint_mul((signed int)word_721460_xs[j + 1] - (signed int)word_721460_xs[j], a_div_b);
 
             if (res + word_721460_xs[j] >= x)
                 ++v53;
@@ -4088,7 +4088,7 @@
           }
           else
           {
-            v21 = fixpoint_sub0(pFloor->zCalc1, x) + fixpoint_sub0(pFloor->zCalc2, y) + (short)(pFloor->zCalc3 >> 16);
+            v21 = fixpoint_mul(pFloor->zCalc1, x) + fixpoint_mul(pFloor->zCalc2, y) + (short)(pFloor->zCalc3 >> 16);
           }
           blv_floor_level[v55] = v21;
           blv_floor_id[v55] = pSector->pFloors[i];
@@ -4141,7 +4141,7 @@
                 else
                 {
                   auto a_div_b = fixpoint_div(y - word_721390_ys[j], word_721390_ys[j + 1] - word_721390_ys[j]);
-                  auto res = fixpoint_sub0(word_721460_xs[j + 1] - word_721460_xs[j], a_div_b);
+                  auto res = fixpoint_mul(word_721460_xs[j + 1] - word_721460_xs[j], a_div_b);
                   if (res + word_721460_xs[j] >= x)
                     ++v54;
                 }
@@ -5164,9 +5164,9 @@
   {
     v16 = v8 * -pGame->pIndoorCameraD3D->vPartyPos.x + v29 * -pGame->pIndoorCameraD3D->vPartyPos.y;
     v17 = -65536 * pGame->pIndoorCameraD3D->vPartyPos.z;
-    this->field_0_party_dir_x = fixpoint_sub0(v16, v28) + fixpoint_sub0((-pGame->pIndoorCameraD3D->vPartyPos.z) << 16, v9);
+    this->field_0_party_dir_x = fixpoint_mul(v16, v28) + fixpoint_mul((-pGame->pIndoorCameraD3D->vPartyPos.z) << 16, v9);
     this->field_4_party_dir_y = v8 * -pGame->pIndoorCameraD3D->vPartyPos.y - v29 * -pGame->pIndoorCameraD3D->vPartyPos.x;
-    this->field_8_party_dir_z = fixpoint_sub0(v17, v28) - fixpoint_sub0(v16, v9);
+    this->field_8_party_dir_z = fixpoint_mul(v17, v28) - fixpoint_mul(v16, v9);
   }
   else
   {
@@ -5177,31 +5177,31 @@
 
   if (pGame->pIndoorCameraD3D->sRotationX)
   {
-    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);
+    v19 = fixpoint_mul(a2, v8) + fixpoint_mul(a3, v29);
+
+    this->field_C = fixpoint_mul(v19, v28) + fixpoint_mul(a4, v9);
+    this->field_10 = fixpoint_mul(a3, v8) - fixpoint_mul(a2, v29);
+    this->field_14 = fixpoint_mul(a4, v28) - fixpoint_mul(v19, v9);
   }
   else
   {
-    this->field_C = fixpoint_sub0(a2, v8) + fixpoint_sub0(a3, v29);
-    this->field_10 = fixpoint_sub0(a3, v8) - fixpoint_sub0(a2, v29);
+    this->field_C = fixpoint_mul(a2, v8) + fixpoint_mul(a3, v29);
+    this->field_10 = fixpoint_mul(a3, v8) - fixpoint_mul(a2, v29);
     this->field_14 = a4;
   }
 
   if (pGame->pIndoorCameraD3D->sRotationX)
   {
-    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);
+    v21 = fixpoint_mul(a5, v8) + fixpoint_mul(a6, v29);
+
+    this->field_18 = fixpoint_mul(v21, v28) + fixpoint_mul(a7, v9);
+    this->field_1C = fixpoint_mul(a6, v8) - fixpoint_mul(a5, v29);
+    this->field_20 = fixpoint_mul(a7, v28) - fixpoint_mul(v21, v9);
   }
   else
   {
-    this->field_18 = fixpoint_sub0(a5, v8) + fixpoint_sub0(a6, v29);
-    this->field_1C = fixpoint_sub0(a6, v8) - fixpoint_sub0(a5, v29);
+    this->field_18 = fixpoint_mul(a5, v8) + fixpoint_mul(a6, v29);
+    this->field_1C = fixpoint_mul(a6, v8) - fixpoint_mul(a5, v29);
     this->field_20 = a7;
   }
 
@@ -5535,9 +5535,9 @@
           if ( v108 >= 0 )
           {
             if ( sub_4075DB(
-                   pOut.x + ((signed int)(fixpoint_sub0(v108, v143) + 32768) >> 16),
-                   pOut.y + ((signed int)(fixpoint_sub0(v108, v147) + 32768) >> 16),
-                   outz + ((signed int)(fixpoint_sub0(v108, v151) + 32768) >> 16),
+                   pOut.x + ((signed int)(fixpoint_mul(v108, v143) + 32768) >> 16),
+                   pOut.y + ((signed int)(fixpoint_mul(v108, v147) + 32768) >> 16),
+                   outz + ((signed int)(fixpoint_mul(v108, v151) + 32768) >> 16),
                    v62) )
             {
               v114 = 1;
@@ -5661,9 +5661,9 @@
         || v132 < v90->pBounding.y1
         || v136 > v90->pBounding.z2
         || v140 < v90->pBounding.z1
-        || (yb = fixpoint_sub0(v144, v90->pFacePlane_old.vNormal.x),
-            v_4b = fixpoint_sub0(v148, v90->pFacePlane_old.vNormal.y),
-            vf = fixpoint_sub0(v152, v90->pFacePlane_old.vNormal.z),
+        || (yb = fixpoint_mul(v144, v90->pFacePlane_old.vNormal.x),
+            v_4b = fixpoint_mul(v148, v90->pFacePlane_old.vNormal.y),
+            vf = fixpoint_mul(v152, v90->pFacePlane_old.vNormal.z),
             v20 = yb + vf + v_4b == 0,
             v91 = yb + vf + v_4b,
             vc = yb + vf + v_4b,
@@ -5704,9 +5704,9 @@
         if ( vd >= 0 )
         {
           if ( sub_4075DB(
-                 pOut.x + ((signed int)(fixpoint_sub0(vd, v144) + 32768) >> 16),
-                 pOut.y + ((signed int)(fixpoint_sub0(vd, v148) + 32768) >> 16),
-                 outz + ((signed int)(fixpoint_sub0(vd, v152) + 32768) >> 16),
+                 pOut.x + ((signed int)(fixpoint_mul(vd, v144) + 32768) >> 16),
+                 pOut.y + ((signed int)(fixpoint_mul(vd, v148) + 32768) >> 16),
+                 outz + ((signed int)(fixpoint_mul(vd, v152) + 32768) >> 16),
                  v90) )
           {
             v113 = 1;
@@ -5804,9 +5804,9 @@
         || v137 < v16->pBoundingBox.y1
         || v133 > v16->pBoundingBox.z2
         || v129 < v16->pBoundingBox.z1
-        || (v17 = fixpoint_sub0(v125, v16->pFacePlane.vNormal.x),
-            v18 = fixpoint_sub0(v121, v16->pFacePlane.vNormal.y),
-            v19 = fixpoint_sub0(v117, v16->pFacePlane.vNormal.z),
+        || (v17 = fixpoint_mul(v125, v16->pFacePlane.vNormal.x),
+            v18 = fixpoint_mul(v121, v16->pFacePlane.vNormal.y),
+            v19 = fixpoint_mul(v117, v16->pFacePlane.vNormal.z),
             v20 = v17 + v18 + v19 == 0,
             v21 = v17 + v18 + v19,
             v109 = v17 + v18 + v19,
@@ -5835,9 +5835,9 @@
         if ( v110 >= 0 )
         {
           if ( sub_4077F1(
-                 pOut.x + ((signed int)(fixpoint_sub0(v110, v125) + 32768) >> 16),
-                 pOut.y + ((signed int)(fixpoint_sub0(v110, v121) + 32768) >> 16),
-                 outz + ((signed int)(fixpoint_sub0(v110, v117) + 32768) >> 16),
+                 pOut.x + ((signed int)(fixpoint_mul(v110, v125) + 32768) >> 16),
+                 pOut.y + ((signed int)(fixpoint_mul(v110, v121) + 32768) >> 16),
+                 outz + ((signed int)(fixpoint_mul(v110, v117) + 32768) >> 16),
                  v16,
                  (BSPVertexBuffer *)a5) )
           {
@@ -5938,9 +5938,9 @@
         || v138 < v39->pBoundingBox.y1
         || v134 > v39->pBoundingBox.z2
         || v130 < v39->pBoundingBox.z1
-        || (ya = fixpoint_sub0(v126, v39->pFacePlane.vNormal.x),
-            ve = fixpoint_sub0(v122, v39->pFacePlane.vNormal.y),
-            v_4 = fixpoint_sub0(v118, v39->pFacePlane.vNormal.z),
+        || (ya = fixpoint_mul(v126, v39->pFacePlane.vNormal.x),
+            ve = fixpoint_mul(v122, v39->pFacePlane.vNormal.y),
+            v_4 = fixpoint_mul(v118, v39->pFacePlane.vNormal.z),
             v20 = ya + ve + v_4 == 0,
             v40 = ya + ve + v_4,
             va = ya + ve + v_4,
@@ -5968,9 +5968,9 @@
         if ( vb >= 0 )
         {
           if ( sub_4077F1(
-                 pOut.x + ((signed int)(fixpoint_sub0(vb, v126) + 32768) >> 16),
-                 pOut.y + ((signed int)(fixpoint_sub0(vb, v122) + 32768) >> 16),
-                 outz + ((signed int)(fixpoint_sub0(vb, v118) + 32768) >> 16),
+                 pOut.x + ((signed int)(fixpoint_mul(vb, v126) + 32768) >> 16),
+                 pOut.y + ((signed int)(fixpoint_mul(vb, v122) + 32768) >> 16),
+                 outz + ((signed int)(fixpoint_mul(vb, v118) + 32768) >> 16),
                  v39,
                  (BSPVertexBuffer *)a5a) )
           {
--- a/Math.h	Tue Sep 17 22:10:06 2013 +0200
+++ b/Math.h	Tue Sep 17 23:10:07 2013 +0200
@@ -24,11 +24,10 @@
 };
 #pragma pack(pop)
 
-__int64 fixpoint_sub0(int, int);
-__int64 fixpoint_sub2(int, int);
+__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_mul(int, int);
+__int64 fixpoint_sub_unknown(int, int);
 int fixpoint_from_float(float value);
 int fixpoint_from_int(int lhv, int rhv);
 
--- a/ParticleEngine.cpp	Tue Sep 17 22:10:06 2013 +0200
+++ b/ParticleEngine.cpp	Tue Sep 17 23:10:07 2013 +0200
@@ -415,7 +415,7 @@
       //uParticleID = v44 >> 16;
       LODWORD(v44) = (signed int)(v44 >> 16) >> 16;
       pParticle->uScreenSpaceY = pBLVRenderParams->uViewportCenterY - v44;
-      pParticle->_screenspace_scale = fixpoint_sub0(fixpoint_from_float(pParticle->flt_28), pParticle->_screenspace_scale);
+      pParticle->_screenspace_scale = fixpoint_mul(fixpoint_from_float(pParticle->flt_28), pParticle->_screenspace_scale);
       pParticle->sZValue = z;
       return true;
     }
@@ -442,7 +442,7 @@
   //v7 = pParticle->flt_28;
   //pParticle->_screenspace_scale = v6 / x;
   //v8 = v7;
-  pParticle->_screenspace_scale = fixpoint_sub0(fixpoint_from_float(pParticle->flt_28), v6 / x);
+  pParticle->_screenspace_scale = fixpoint_mul(fixpoint_from_float(pParticle->flt_28), v6 / x);
   pParticle->sZValue = x;
   return true;
 }
@@ -527,11 +527,11 @@
         //uIDc = (LODWORD(v8) - pIndoorCamera->pos.x) << 16;
         //v9 = v6->_y + 6.7553994e15;
         //v10 = (LODWORD(v9) - pIndoorCamera->pos.y) << 16;
-        v11 = fixpoint_mul(v6->x - pGame->pIndoorCameraD3D->vPartyPos.x, v4) + fixpoint_mul(v6->y - pGame->pIndoorCameraD3D->vPartyPos.y, v5);
-        //HIDWORD(v8) = fixpoint_mul(v6->x - pIndoorCamera->pos.x, v5);
+        v11 = fixpoint_sub_unknown(v6->x - pGame->pIndoorCameraD3D->vPartyPos.x, v4) + fixpoint_sub_unknown(v6->y - pGame->pIndoorCameraD3D->vPartyPos.y, v5);
+        //HIDWORD(v8) = fixpoint_sub_unknown(v6->x - pIndoorCamera->pos.x, v5);
         //v12 = v6->_z + 6.7553994e15;
         //uIDd = (LODWORD(v12) - pIndoorCamera->pos.z) << 16;
-        auto _hidword_v12 = fixpoint_sub0(v11, v3) + fixpoint_mul(v6->z - pGame->pIndoorCameraD3D->vPartyPos.z, v44);
+        auto _hidword_v12 = fixpoint_mul(v11, v3) + fixpoint_sub_unknown(v6->z - pGame->pIndoorCameraD3D->vPartyPos.z, v44);
         LODWORD(v13) = 0;
         HIDWORD(v13) = SLOWORD(pODMRenderParams->int_fov_rad);
         //v14 = v13 / _hidword_v12;
@@ -539,24 +539,24 @@
         //v15 = v6->_screenspace_scale;
         v6->uScreenSpaceX = pViewport->uScreenCenterX
                           - ((signed int)((unsigned __int64)(v6->_screenspace_scale
-                                                           * (signed __int64)(fixpoint_mul(v6->y - pGame->pIndoorCameraD3D->vPartyPos.y, v4)
-                                                                                        - fixpoint_mul(v6->x - pGame->pIndoorCameraD3D->vPartyPos.x, v5))) >> 16) >> 16);
+                                                           * (signed __int64)(fixpoint_sub_unknown(v6->y - pGame->pIndoorCameraD3D->vPartyPos.y, v4)
+                                                                                        - fixpoint_sub_unknown(v6->x - pGame->pIndoorCameraD3D->vPartyPos.x, v5))) >> 16) >> 16);
         v6->uScreenSpaceY = pViewport->uScreenCenterY
                           - ((signed int)((unsigned __int64)(v6->_screenspace_scale
-                                                           * (signed __int64)(fixpoint_mul(v6->z - pGame->pIndoorCameraD3D->vPartyPos.z, v3)
+                                                           * (signed __int64)(fixpoint_sub_unknown(v6->z - pGame->pIndoorCameraD3D->vPartyPos.z, v3)
                                                                                         - ((unsigned __int64)(v11 * (signed __int64)v44) >> 16))) >> 16) >> 16);
         v6->sZValue = _hidword_v12;
       }
       //uIDe = (v41 - pIndoorCamera->pos.x) << 16;
       //v47 = (LODWORD(v39) - pIndoorCamera->pos.y) << 16;
-      v45 = fixpoint_mul(v6->x - pGame->pIndoorCameraD3D->vPartyPos.x, v4) + fixpoint_mul(v6->y - pGame->pIndoorCameraD3D->vPartyPos.y, v5);
-      //HIDWORD(v42) = fixpoint_mul(v6->x - pIndoorCamera->pos.x, v5);
+      v45 = fixpoint_sub_unknown(v6->x - pGame->pIndoorCameraD3D->vPartyPos.x, v4) + fixpoint_sub_unknown(v6->y - pGame->pIndoorCameraD3D->vPartyPos.y, v5);
+      //HIDWORD(v42) = fixpoint_sub_unknown(v6->x - pIndoorCamera->pos.x, v5);
       //uIDa = (LODWORD(v42) - pIndoorCamera->pos.z) << 16;
-      X_4 = fixpoint_mul(v6->z - pGame->pIndoorCameraD3D->vPartyPos.z, v44) + fixpoint_sub0(v45, v3);
+      X_4 = fixpoint_sub_unknown(v6->z - pGame->pIndoorCameraD3D->vPartyPos.z, v44) + fixpoint_mul(v45, v3);
       if ( X_4 < 0x40000 )
         return 0;
-      v16 = fixpoint_mul(v6->y - pGame->pIndoorCameraD3D->vPartyPos.y, v4) - fixpoint_mul(v6->x - pGame->pIndoorCameraD3D->vPartyPos.x, v5);
-      v17 = fixpoint_mul(v6->z - pGame->pIndoorCameraD3D->vPartyPos.z, v3) - fixpoint_sub0(v45, v44);
+      v16 = fixpoint_sub_unknown(v6->y - pGame->pIndoorCameraD3D->vPartyPos.y, v4) - fixpoint_sub_unknown(v6->x - pGame->pIndoorCameraD3D->vPartyPos.x, v5);
+      v17 = fixpoint_sub_unknown(v6->z - pGame->pIndoorCameraD3D->vPartyPos.z, v3) - fixpoint_mul(v45, v44);
     }
     else
     {
@@ -569,26 +569,26 @@
         //v21 = v6->_z + 6.7553994e15;
         LODWORD(v22) = 0;
         HIDWORD(v22) = SLOWORD(pODMRenderParams->int_fov_rad);
-        auto _var_123 = fixpoint_mul(v6->x - pGame->pIndoorCameraD3D->vPartyPos.x, v4) + fixpoint_mul(v6->y - pGame->pIndoorCameraD3D->vPartyPos.y, v5);
+        auto _var_123 = fixpoint_sub_unknown(v6->x - pGame->pIndoorCameraD3D->vPartyPos.x, v4) + fixpoint_sub_unknown(v6->y - pGame->pIndoorCameraD3D->vPartyPos.y, v5);
         //v23 = v22 / _var_123;
         v6->_screenspace_scale = v22 / _var_123;
         //v24 = v6->_screenspace_scale;
         v6->uScreenSpaceX = pViewport->uScreenCenterX
                           - ((signed int)((unsigned __int64)(v6->_screenspace_scale
-                                                           * (signed __int64)(fixpoint_mul(v6->y - pGame->pIndoorCameraD3D->vPartyPos.y, v4)
-                                                                                        - fixpoint_mul(v6->x - pGame->pIndoorCameraD3D->vPartyPos.x, v5))) >> 16) >> 16);
-        v6->uScreenSpaceY = pViewport->uScreenCenterY - (fixpoint_mul(v6->z, v6->_screenspace_scale) >> 16);
+                                                           * (signed __int64)(fixpoint_sub_unknown(v6->y - pGame->pIndoorCameraD3D->vPartyPos.y, v4)
+                                                                                        - fixpoint_sub_unknown(v6->x - pGame->pIndoorCameraD3D->vPartyPos.x, v5))) >> 16) >> 16);
+        v6->uScreenSpaceY = pViewport->uScreenCenterY - (fixpoint_sub_unknown(v6->z, v6->_screenspace_scale) >> 16);
         v6->sZValue = _var_123;
       }
       //uIDb = (v41 - pIndoorCamera->pos.x) << 16;
       //v48 = (LODWORD(v39) - pIndoorCamera->pos.y) << 16;
-      v26 = fixpoint_mul(v6->y - pGame->pIndoorCameraD3D->vPartyPos.y, v5);
+      v26 = fixpoint_sub_unknown(v6->y - pGame->pIndoorCameraD3D->vPartyPos.y, v5);
       //v27 = v26 + ((unsigned __int64)(uIDb * (signed __int64)v4) >> 16);
-      X_4 = v26 + fixpoint_mul(v6->x - pGame->pIndoorCameraD3D->vPartyPos.x, v4);
+      X_4 = v26 + fixpoint_sub_unknown(v6->x - pGame->pIndoorCameraD3D->vPartyPos.x, v4);
       if ( X_4 < 0x40000 || X_4 > (pODMRenderParams->uPickDepth - 1000) << 16 )
         return 0;
       v17 = v6->z;
-      v16 = fixpoint_mul(v6->y - pGame->pIndoorCameraD3D->vPartyPos.y, v4) - fixpoint_mul(v6->x - pGame->pIndoorCameraD3D->vPartyPos.x, v5);
+      v16 = fixpoint_sub_unknown(v6->y - pGame->pIndoorCameraD3D->vPartyPos.y, v4) - fixpoint_sub_unknown(v6->x - pGame->pIndoorCameraD3D->vPartyPos.x, v5);
     }
     v40 = v17;
     v28 = abs(v16);
@@ -604,7 +604,7 @@
       v33 = (signed int)((unsigned __int64)(v6->_screenspace_scale * (signed __int64)v40) >> 16) >> 16;
       //v34 = pViewport->uScreenCenterY - v33;
       v6->uScreenSpaceY = pViewport->uScreenCenterY - v33;
-      v6->_screenspace_scale = fixpoint_sub0(fixpoint_from_float(v6->flt_28), v6->_screenspace_scale);
+      v6->_screenspace_scale = fixpoint_mul(fixpoint_from_float(v6->flt_28), v6->_screenspace_scale);
       v6->sZValue = X_4;
       v36 = v6->uScreenSpaceX;
       if ( v36 >= (signed int)pViewport->uViewportTL_X )
--- a/SpriteObject.cpp	Tue Sep 17 22:10:06 2013 +0200
+++ b/SpriteObject.cpp	Tue Sep 17 23:10:07 2013 +0200
@@ -82,11 +82,11 @@
     pSpriteObjects[v6].vVelocity.z = 0;
     if ( a4 )
     {
-      v13 = fixpoint_sub0(stru_5C6E00->Cos(angle), stru_5C6E00->Cos(pitch));
-      a5a = fixpoint_sub0(stru_5C6E00->Sin(angle), stru_5C6E00->Cos(pitch));
-      pSpriteObjects[v6].vVelocity.x = fixpoint_sub0(v13, a4);
-      pSpriteObjects[v6].vVelocity.y = fixpoint_sub0(a5a, a4);
-      pSpriteObjects[v6].vVelocity.z = fixpoint_sub0(stru_5C6E00->Sin(pitch), a4);
+      v13 = fixpoint_mul(stru_5C6E00->Cos(angle), stru_5C6E00->Cos(pitch));
+      a5a = fixpoint_mul(stru_5C6E00->Sin(angle), stru_5C6E00->Cos(pitch));
+      pSpriteObjects[v6].vVelocity.x = fixpoint_mul(v13, a4);
+      pSpriteObjects[v6].vVelocity.y = fixpoint_mul(a5a, a4);
+      pSpriteObjects[v6].vVelocity.z = fixpoint_mul(stru_5C6E00->Sin(pitch), a4);
     }
     else
     {
@@ -107,11 +107,11 @@
     pSpriteObjects[v6].vVelocity.z = 0;
     if ( a4 )
     {
-      v13 = fixpoint_sub0(stru_5C6E00->Cos(angle), stru_5C6E00->Cos(pitch));
-      a5a = fixpoint_sub0(stru_5C6E00->Sin(angle), stru_5C6E00->Cos(pitch));
-      pSpriteObjects[v6].vVelocity.x = fixpoint_sub0(v13, a4);
-      pSpriteObjects[v6].vVelocity.y = fixpoint_sub0(a5a, a4);
-      pSpriteObjects[v6].vVelocity.z = fixpoint_sub0(stru_5C6E00->Sin(pitch), a4);
+      v13 = fixpoint_mul(stru_5C6E00->Cos(angle), stru_5C6E00->Cos(pitch));
+      a5a = fixpoint_mul(stru_5C6E00->Sin(angle), stru_5C6E00->Cos(pitch));
+      pSpriteObjects[v6].vVelocity.x = fixpoint_mul(v13, a4);
+      pSpriteObjects[v6].vVelocity.y = fixpoint_mul(a5a, a4);
+      pSpriteObjects[v6].vVelocity.z = fixpoint_mul(stru_5C6E00->Sin(pitch), a4);
     }
     else
     {
@@ -132,11 +132,11 @@
     pSpriteObjects[v6].vVelocity.z = 0;
     if ( a4 )
     {
-      v13 = fixpoint_sub0(stru_5C6E00->Cos(angle), stru_5C6E00->Cos(pitch)) >> 16;
-      a5a = fixpoint_sub0(stru_5C6E00->Sin(angle), stru_5C6E00->Cos(pitch)) >> 16;
-      pSpriteObjects[v6].vVelocity.x = fixpoint_sub0(v13, a4);
-      pSpriteObjects[v6].vVelocity.y = fixpoint_sub0(a5a, a4);
-      pSpriteObjects[v6].vVelocity.z = fixpoint_sub0(stru_5C6E00->Sin(pitch), a4);
+      v13 = fixpoint_mul(stru_5C6E00->Cos(angle), stru_5C6E00->Cos(pitch)) >> 16;
+      a5a = fixpoint_mul(stru_5C6E00->Sin(angle), stru_5C6E00->Cos(pitch)) >> 16;
+      pSpriteObjects[v6].vVelocity.x = fixpoint_mul(v13, a4);
+      pSpriteObjects[v6].vVelocity.y = fixpoint_mul(a5a, a4);
+      pSpriteObjects[v6].vVelocity.z = fixpoint_mul(stru_5C6E00->Sin(pitch), a4);
     }
     else
     {
@@ -157,11 +157,11 @@
     pSpriteObjects[v6].vVelocity.z = 0;
     if ( a4 )
     {
-      v13 = fixpoint_sub0(stru_5C6E00->Cos(angle), stru_5C6E00->Cos(pitch));
-      a5a = fixpoint_sub0(stru_5C6E00->Sin(angle), stru_5C6E00->Cos(pitch));
-      pSpriteObjects[v6].vVelocity.x = fixpoint_sub0(v13, a4);
-      pSpriteObjects[v6].vVelocity.y = fixpoint_sub0(a5a, a4);
-      pSpriteObjects[v6].vVelocity.z = fixpoint_sub0(stru_5C6E00->Sin(pitch), a4);
+      v13 = fixpoint_mul(stru_5C6E00->Cos(angle), stru_5C6E00->Cos(pitch));
+      a5a = fixpoint_mul(stru_5C6E00->Sin(angle), stru_5C6E00->Cos(pitch));
+      pSpriteObjects[v6].vVelocity.x = fixpoint_mul(v13, a4);
+      pSpriteObjects[v6].vVelocity.y = fixpoint_mul(a5a, a4);
+      pSpriteObjects[v6].vVelocity.z = fixpoint_mul(stru_5C6E00->Sin(pitch), a4);
     }
     else
     {
@@ -182,11 +182,11 @@
     pSpriteObjects[v6].vVelocity.z = 0;
     if ( a4 )
     {
-      v13 = fixpoint_sub0(stru_5C6E00->Cos(angle), stru_5C6E00->Cos(pitch));
-      a5a = fixpoint_sub0(stru_5C6E00->Sin(angle), stru_5C6E00->Cos(pitch));
-      pSpriteObjects[v6].vVelocity.x = fixpoint_sub0(v13, a4);
-      pSpriteObjects[v6].vVelocity.y = fixpoint_sub0(a5a, a4);
-      pSpriteObjects[v6].vVelocity.z = fixpoint_sub0(stru_5C6E00->Sin(pitch), a4);
+      v13 = fixpoint_mul(stru_5C6E00->Cos(angle), stru_5C6E00->Cos(pitch));
+      a5a = fixpoint_mul(stru_5C6E00->Sin(angle), stru_5C6E00->Cos(pitch));
+      pSpriteObjects[v6].vVelocity.x = fixpoint_mul(v13, a4);
+      pSpriteObjects[v6].vVelocity.y = fixpoint_mul(a5a, a4);
+      pSpriteObjects[v6].vVelocity.z = fixpoint_mul(stru_5C6E00->Sin(pitch), a4);
     }
     else
     {
@@ -311,11 +311,11 @@
       v1->vVelocity.z -= LOWORD(pEventTimer->uTimeElapsed) * GetGravityStrength();
       v56 = abs(v51.y * v1->vVelocity.y + v51.z * v1->vVelocity.z + v51.x * v1->vVelocity.x) >> 16;
       //v60 = ((unsigned __int64)(v56 * (signed __int64)v51.x) >> 16);
-      v1->vVelocity.x += fixpoint_sub0(v56, v51.x);
+      v1->vVelocity.x += fixpoint_mul(v56, v51.x);
       //v60 = ((unsigned __int64)(v56 * (signed __int64)v51.y) >> 16);
-      v1->vVelocity.y += fixpoint_sub0(v56, v51.y);
+      v1->vVelocity.y += fixpoint_mul(v56, v51.y);
       //v60 = ((unsigned __int64)(v56 * (signed __int64)v51.z) >> 16);
-      v1->vVelocity.z += fixpoint_sub0(v56, v51.z);
+      v1->vVelocity.z += fixpoint_mul(v56, v51.z);
 LABEL_12:
       v7 = v54;
       goto LABEL_13;
@@ -331,9 +331,9 @@
     if ( !(v2->uFlags & OBJECT_DESC_BOUNCE) || (v21 = -v1->vVelocity.z >> 1, v1->vVelocity.z = v21, (signed __int16)v21 < 10) )
       v1->vVelocity.z = 0;
 
-    v1->vVelocity.x = fixpoint_sub0(58500, v1->vVelocity.x);
-    v1->vVelocity.y = fixpoint_sub0(58500, v1->vVelocity.y);
-    v1->vVelocity.z = fixpoint_sub0(58500, v1->vVelocity.z);
+    v1->vVelocity.x = fixpoint_mul(58500, v1->vVelocity.x);
+    v1->vVelocity.y = fixpoint_mul(58500, v1->vVelocity.y);
+    v1->vVelocity.z = fixpoint_mul(58500, v1->vVelocity.z);
 
     if ( (v1->vVelocity.y * v1->vVelocity.y + v1->vVelocity.x * v1->vVelocity.x) < 400 )
         {
@@ -503,12 +503,12 @@
         return;
       }
       //v60 = ((unsigned __int64)(stru_721530.field_7C * (signed __int64)stru_721530.direction.x) >> 16);
-      v1->vPosition.x += fixpoint_sub0(stru_721530.field_7C, stru_721530.direction.x);
+      v1->vPosition.x += fixpoint_mul(stru_721530.field_7C, stru_721530.direction.x);
       //v60 = ((unsigned __int64)(stru_721530.field_7C * (signed __int64)stru_721530.direction.y) >> 16);
-      v1->vPosition.y += fixpoint_sub0(stru_721530.field_7C, stru_721530.direction.y);
+      v1->vPosition.y += fixpoint_mul(stru_721530.field_7C, stru_721530.direction.y);
       //v60 = ((unsigned __int64)(stru_721530.field_7C * (signed __int64)stru_721530.direction.z) >> 16);
       v28 = LOWORD(stru_721530.uSectorID);
-      v1->vPosition.z += fixpoint_sub0(stru_721530.field_7C, stru_721530.direction.z);
+      v1->vPosition.z += fixpoint_mul(stru_721530.field_7C, stru_721530.direction.z);
       v29 = v1->vPosition.z;
       v1->uSectorID = v28;
       stru_721530.field_70 += stru_721530.field_7C;
@@ -786,11 +786,11 @@
         return;
       }
       //v40 = (unsigned __int64)(stru_721530.field_7C * (signed __int64)stru_721530.direction.x) >> 16;
-      pSpriteObject->vPosition.x += fixpoint_sub0(stru_721530.field_7C, stru_721530.direction.x);
+      pSpriteObject->vPosition.x += fixpoint_mul(stru_721530.field_7C, stru_721530.direction.x);
       //v40 = (unsigned __int64)(stru_721530.field_7C * (signed __int64)stru_721530.direction.y) >> 16;
-      pSpriteObject->vPosition.y += fixpoint_sub0(stru_721530.field_7C, stru_721530.direction.y);
+      pSpriteObject->vPosition.y += fixpoint_mul(stru_721530.field_7C, stru_721530.direction.y);
       //v40 = (unsigned __int64)(stru_721530.field_7C * (signed __int64)stru_721530.direction.z) >> 16;
-      pSpriteObject->vPosition.z += fixpoint_sub0(stru_721530.field_7C, stru_721530.direction.z);
+      pSpriteObject->vPosition.z += fixpoint_mul(stru_721530.field_7C, stru_721530.direction.z);
       pSpriteObject->uSectorID = stru_721530.uSectorID;
       stru_721530.field_70 += stru_721530.field_7C;
       if ( pObject->uFlags & 0x40 && !_46BFFA_check_object_intercept(uLayingItemID, stru_721530.uFaceID) )
@@ -801,8 +801,8 @@
         v40 = integer_sqrt(pSpriteObject->vVelocity.x * pSpriteObject->vVelocity.x + pSpriteObject->vVelocity.y * pSpriteObject->vVelocity.y);
         v23 = stru_5C6E00->Atan2(pSpriteObject->vPosition.x - pLevelDecorations[v15].vPosition.x,
                 pSpriteObject->vPosition.y - pLevelDecorations[v15].vPosition.y);
-        pSpriteObject->vVelocity.x = fixpoint_sub0(stru_5C6E00->Cos(v23), v40);
-        pSpriteObject->vVelocity.y = fixpoint_sub0(stru_5C6E00->Sin(v23), v40);
+        pSpriteObject->vVelocity.x = fixpoint_mul(stru_5C6E00->Cos(v23), v40);
+        pSpriteObject->vVelocity.y = fixpoint_mul(stru_5C6E00->Sin(v23), v40);
       }
       else
       {
@@ -816,9 +816,9 @@
                                                                     + v16->pFacePlane_old.vNormal.y * pSpriteObject->vVelocity.y) >> 16;
           if ( (stru_721530.speed >> 3) > v42 )
             v42 = stru_721530.speed >> 3;
-          pSpriteObject->vVelocity.x += 2 * fixpoint_sub0(v42, v16->pFacePlane_old.vNormal.x);
-          pSpriteObject->vVelocity.y += 2 * fixpoint_sub0(v42, v16->pFacePlane_old.vNormal.y);
-          v39 = fixpoint_sub0(v42, v16->pFacePlane_old.vNormal.z);
+          pSpriteObject->vVelocity.x += 2 * fixpoint_mul(v42, v16->pFacePlane_old.vNormal.x);
+          pSpriteObject->vVelocity.y += 2 * fixpoint_mul(v42, v16->pFacePlane_old.vNormal.y);
+          v39 = fixpoint_mul(v42, v16->pFacePlane_old.vNormal.z);
           if ( v16->pFacePlane_old.vNormal.z <= 32000 )
           {
             v22 = 2 * v39;
@@ -826,7 +826,7 @@
           else
           {
             pSpriteObject->vVelocity.z += v39;
-            v22 = fixpoint_sub0(32000, v39);
+            v22 = fixpoint_mul(32000, v39);
           }
           pSpriteObject->vVelocity.z += v22;
           if ( BYTE3(v16->uAttributes) & 0x10 )
@@ -861,9 +861,9 @@
 LABEL_63:
       //v2 = v37;
 LABEL_64:
-      pSpriteObject->vVelocity.x = fixpoint_sub0(58500, pSpriteObject->vVelocity.x);
-      pSpriteObject->vVelocity.y = fixpoint_sub0(58500, pSpriteObject->vVelocity.y);
-      pSpriteObject->vVelocity.z = fixpoint_sub0(58500, pSpriteObject->vVelocity.z);
+      pSpriteObject->vVelocity.x = fixpoint_mul(58500, pSpriteObject->vVelocity.x);
+      pSpriteObject->vVelocity.y = fixpoint_mul(58500, pSpriteObject->vVelocity.y);
+      pSpriteObject->vVelocity.z = fixpoint_mul(58500, pSpriteObject->vVelocity.z);
       ++uFaceID;
       v28 = __OFSUB__(uFaceID, 100);
       v27 = uFaceID - 100 < 0;
@@ -893,9 +893,9 @@
         pSpriteObject->vVelocity.z -= LOWORD(pEventTimer->uTimeElapsed) * GetGravityStrength();
       v8 = 0;
     }
-    pSpriteObject->vVelocity.x = fixpoint_sub0(58500, pSpriteObject->vVelocity.x);
-    pSpriteObject->vVelocity.y = fixpoint_sub0(58500, pSpriteObject->vVelocity.y);
-    pSpriteObject->vVelocity.z = fixpoint_sub0(58500, pSpriteObject->vVelocity.z);
+    pSpriteObject->vVelocity.x = fixpoint_mul(58500, pSpriteObject->vVelocity.x);
+    pSpriteObject->vVelocity.y = fixpoint_mul(58500, pSpriteObject->vVelocity.y);
+    pSpriteObject->vVelocity.z = fixpoint_mul(58500, pSpriteObject->vVelocity.z);
     v9 = pSpriteObject->vVelocity.x;
     if ( v9 * v9 + pSpriteObject->vVelocity.y * pSpriteObject->vVelocity.y < 400 )
     {
--- a/Viewport.cpp	Tue Sep 17 22:10:06 2013 +0200
+++ b/Viewport.cpp	Tue Sep 17 23:10:07 2013 +0200
@@ -54,7 +54,7 @@
     this->uScreenHeight = br_y - tl_y + 1;
     this->uScreenCenterX = (signed int)(br_x + tl_x) /2;
     if ( pRenderer->pRenderD3D == 0 )
-        this->uScreenCenterY = this->uScreen_BR_Y - fixpoint_sub0(field_30, uScreenHeight);
+        this->uScreenCenterY = this->uScreen_BR_Y - fixpoint_mul(field_30, uScreenHeight);
     else
         this->uScreenCenterY = uScreenHeight/2;
     SetViewport(this->uScreen_TL_X, this->uScreen_TL_Y, this->uScreen_BR_X, this->uScreen_BR_Y);
--- a/mm7_1.cpp	Tue Sep 17 22:10:06 2013 +0200
+++ b/mm7_1.cpp	Tue Sep 17 23:10:07 2013 +0200
@@ -52,7 +52,7 @@
   return ((__int64)a1 << 16) / a2;
 }
 
-__int64 fixpoint_mul(int a1, int a2)
+__int64 fixpoint_sub_unknown(int a1, int a2)
 {
   return (((__int64)a1 << 16) * a2) >> 16;
 }
@@ -61,24 +61,16 @@
 //----- (0042EBBE) --------------------------------------------------------
 //----- (004453C0) mm6-----------------------------------------------------
 //----- (004A1760) mm6_chinese---------------------------------------------
-__int64 fixpoint_sub0(int a1, int a2)
+__int64 fixpoint_mul(int a1, int a2)
 {
   return ((__int64)a1 * (__int64)a2) >> 16;
 }
-__int64 fixpoint_sub2(int a1, int a2)
-{
-  signed __int64 v3; // qtt@1
-
-  LODWORD(v3) = a1 << 16;
-  HIDWORD(v3) = a1 >> 16;
-  return v3 / a2;
-}
 
 __int64 fixpoint_dot(int x1, int x2, int y1, int y2, int z1, int z2)
 {
-  return fixpoint_sub0(x1, x2) +
-         fixpoint_sub0(y1, y2) +
-         fixpoint_sub0(z1, z2);
+  return fixpoint_mul(x1, x2) +
+         fixpoint_mul(y1, y2) +
+         fixpoint_mul(z1, z2);
 }
 
 //----- (0041D20D) --------------------------------------------------------
--- a/mm7_2.cpp	Tue Sep 17 22:10:06 2013 +0200
+++ b/mm7_2.cpp	Tue Sep 17 23:10:07 2013 +0200
@@ -1343,15 +1343,15 @@
     v6->pMonsterInfo.uExp = 0;
     v6->uMovementSpeed = v9;
     v10 = rand() % 2048;
-    //v11 = pParty->vPosition.x + fixpoint_sub0(stru_5C6E00->Cos(v10), v19);
+    //v11 = pParty->vPosition.x + fixpoint_mul(stru_5C6E00->Cos(v10), v19);
     uFaceID = stru_5C6E00->Sin(v10);
     //v12 = pParty->vPosition.y;
-    //v13 = fixpoint_sub0(uFaceID, v19);
-    //v14 = pParty->vPosition.y + fixpoint_sub0(uFaceID, v19);
+    //v13 = fixpoint_mul(uFaceID, v19);
+    //v14 = pParty->vPosition.y + fixpoint_mul(uFaceID, v19);
     //LOWORD(v12) = v22;
-    v6->vInitialPosition.x = pParty->vPosition.x + fixpoint_sub0(stru_5C6E00->Cos(v10), v19);
+    v6->vInitialPosition.x = pParty->vPosition.x + fixpoint_mul(stru_5C6E00->Cos(v10), v19);
     v6->vPosition.x = v6->vInitialPosition.x;
-    v6->vInitialPosition.y = pParty->vPosition.y + fixpoint_sub0(uFaceID, v19);
+    v6->vInitialPosition.y = pParty->vPosition.y + fixpoint_mul(uFaceID, v19);
     v6->vPosition.y = v6->vInitialPosition.y;
     v6->vInitialPosition.z = pParty->vPosition.z;
     v6->vPosition.z = v6->vInitialPosition.z;
--- a/mm7_3.cpp	Tue Sep 17 22:10:06 2013 +0200
+++ b/mm7_3.cpp	Tue Sep 17 23:10:07 2013 +0200
@@ -794,22 +794,22 @@
   else
     v7 = pEventTimer->dt_in_some_format;
 
-  v8 = fixpoint_sub0(v7, speed) - v2->field_70; // speed * dt - something
+  v8 = fixpoint_mul(v7, speed) - v2->field_70; // speed * dt - something
   v2->field_6C = v8;
   if ( v8 > 0 )
   {
-    v10 = fixpoint_sub0(v8, v2->direction.x) + v2->normal.x;
+    v10 = fixpoint_mul(v8, v2->direction.x) + v2->normal.x;
     v2->field_4C = v10;
     v2->normal2.x = v10;
-    v11 = fixpoint_sub0(v2->field_6C, v2->direction.y) + v2->normal.y;
+    v11 = fixpoint_mul(v2->field_6C, v2->direction.y) + v2->normal.y;
     v2->field_50 = v11;
     v2->normal2.y = v11;
-    v2->normal2.z = fixpoint_sub0(v2->field_6C, v2->direction.z) + v2->normal.z;
+    v2->normal2.z = fixpoint_mul(v2->field_6C, v2->direction.z) + v2->normal.z;
     v12 = v2->position.z;
     v13 = v2->normal.x;
     v14 = v2->normal2.x;
     v15 = v2->prolly_normal_d;
-    v16 = v12 + fixpoint_sub0(v2->field_6C, v2->direction.z);
+    v16 = v12 + fixpoint_mul(v2->field_6C, v2->direction.z);
     v28 = v16;
     v2->field_54 = v16;
     v17 = v13;
@@ -991,21 +991,21 @@
       if ( v8 > 1000 )
         v8 = 1000;
 
-      v0->vVelocity.x = fixpoint_sub0(stru_5C6E00->Cos(v0->uYawAngle), v8);
-      v0->vVelocity.y = fixpoint_sub0(stru_5C6E00->Sin(v0->uYawAngle), v8);
+      v0->vVelocity.x = fixpoint_mul(stru_5C6E00->Cos(v0->uYawAngle), v8);
+      v0->vVelocity.y = fixpoint_mul(stru_5C6E00->Sin(v0->uYawAngle), v8);
       if ( uIsFlying )
       {
-        v0->vVelocity.z = fixpoint_sub0(stru_5C6E00->Sin(v0->uPitchAngle), v8);
+        v0->vVelocity.z = fixpoint_mul(stru_5C6E00->Sin(v0->uPitchAngle), v8);
       }
       //v7 = v68;
     }
     else
     {
-      v0->vVelocity.x = fixpoint_sub0(55000, v0->vVelocity.x);
-      v0->vVelocity.y = fixpoint_sub0(55000, v0->vVelocity.y);
+      v0->vVelocity.x = fixpoint_mul(55000, v0->vVelocity.x);
+      v0->vVelocity.y = fixpoint_mul(55000, v0->vVelocity.y);
       if ( uIsFlying )
       {
-        v0->vVelocity.z = fixpoint_sub0(55000, v0->vVelocity.z);
+        v0->vVelocity.z = fixpoint_mul(55000, v0->vVelocity.z);
       }
     }
     if ( v0->vPosition.z < v5 )
@@ -1028,9 +1028,9 @@
         v0->vVelocity.z += -8 * LOWORD(pEventTimer->uTimeElapsed) * v20;
         int v73 = abs(v62.x * v0->vVelocity.x + v62.z * v0->vVelocity.z + v62.y * v0->vVelocity.y) >> 16;
         //v72b = v21;
-        v0->vVelocity.x += fixpoint_sub0(v73, v62.x);
-        v0->vVelocity.y += fixpoint_sub0(v73, v62.y);
-        v0->vVelocity.z += fixpoint_sub0(v73, v62.z);
+        v0->vVelocity.x += fixpoint_mul(v73, v62.x);
+        v0->vVelocity.y += fixpoint_mul(v73, v62.y);
+        v0->vVelocity.z += fixpoint_mul(v73, v62.z);
         //v17 = 0;
       }
     }
@@ -1097,7 +1097,7 @@
       }
       v71 = i > 1;
       if ( stru_721530.field_7C < stru_721530.field_6C )
-        v70 = fixpoint_sub0(stru_721530.field_7C, stru_721530.direction.z);
+        v70 = fixpoint_mul(stru_721530.field_7C, stru_721530.direction.z);
       //v34 = 0;
       v35 = stru_721530.normal2.z - stru_721530.prolly_normal_d - 1;
       v36 = ODM_GetFloorLevel(stru_721530.normal2.x,
@@ -1130,12 +1130,12 @@
         v0->vPosition.z = LOWORD(stru_721530.normal2.z) - LOWORD(stru_721530.prolly_normal_d) - 1;
         break;
       }
-      //v72b = fixpoint_sub0(stru_721530.field_7C, stru_721530.field_58.x);
-      v0->vPosition.x += fixpoint_sub0(stru_721530.field_7C, stru_721530.direction.x);
+      //v72b = fixpoint_mul(stru_721530.field_7C, stru_721530.field_58.x);
+      v0->vPosition.x += fixpoint_mul(stru_721530.field_7C, stru_721530.direction.x);
       //v72b = (unsigned __int64)(stru_721530.field_7C * (signed __int64)stru_721530.field_58.y) >> 16;
-      v0->vPosition.y += fixpoint_sub0(stru_721530.field_7C, stru_721530.direction.y);
+      v0->vPosition.y += fixpoint_mul(stru_721530.field_7C, stru_721530.direction.y);
       //v72b = (unsigned __int64)(stru_721530.field_7C * (signed __int64)stru_721530.field_58.z) >> 16;
-      v0->vPosition.z += fixpoint_sub0(stru_721530.field_7C, stru_721530.direction.z);
+      v0->vPosition.z += fixpoint_mul(stru_721530.field_7C, stru_721530.direction.z);
       v38 = stru_721530.uFaceID;
       stru_721530.field_70 += stru_721530.field_7C;
 	  v39 = PID_ID(v38);
@@ -1193,8 +1193,8 @@
                   v0->vPosition.x - pLevelDecorations[v39].vPosition.x,
                   v0->vPosition.y - pLevelDecorations[v39].vPosition.y);
           v49 = v48;
-          v0->vVelocity.x = fixpoint_sub0(stru_5C6E00->Cos(v48), v47);
-          v0->vVelocity.y = fixpoint_sub0(stru_5C6E00->Sin(v48), v47);
+          v0->vVelocity.x = fixpoint_mul(stru_5C6E00->Cos(v48), v47);
+          v0->vVelocity.y = fixpoint_mul(stru_5C6E00->Sin(v48), v47);
           break;
         case OBJECT_BModel:
           v40 = &pOutdoor->pBModels[v38 >> 9];
@@ -1221,9 +1221,9 @@
               if ( (stru_721530.speed >> 3) > v72b )
                 v72b = stru_721530.speed >> 3;
 
-              v0->vVelocity.x += fixpoint_sub0(v72b, v41->pFacePlane.vNormal.x);
-              v0->vVelocity.y += fixpoint_sub0(v72b, v41->pFacePlane.vNormal.y);
-              v0->vVelocity.z += fixpoint_sub0(v72b, v41->pFacePlane.vNormal.z);
+              v0->vVelocity.x += fixpoint_mul(v72b, v41->pFacePlane.vNormal.x);
+              v0->vVelocity.y += fixpoint_mul(v72b, v41->pFacePlane.vNormal.y);
+              v0->vVelocity.z += fixpoint_mul(v72b, v41->pFacePlane.vNormal.z);
               if ( v42 != 4 )
               {
                 v45 = v0->vPosition.z;
@@ -1245,9 +1245,9 @@
           break;
       }
 
-      v0->vVelocity.x = fixpoint_sub0(58500, v0->vVelocity.x);
-      v0->vVelocity.y = fixpoint_sub0(58500, v0->vVelocity.y);
-      v0->vVelocity.z = fixpoint_sub0(58500, v0->vVelocity.z);
+      v0->vVelocity.x = fixpoint_mul(58500, v0->vVelocity.x);
+      v0->vVelocity.y = fixpoint_mul(58500, v0->vVelocity.y);
+      v0->vVelocity.z = fixpoint_mul(58500, v0->vVelocity.z);
 
       ++v69;
       if ( v69 >= 100 )
@@ -1696,37 +1696,37 @@
         break;
 
       case PARTY_StrafeLeft:
-        v2 -= fixpoint_sub0(stru_5C6E00->Sin(angle), v81 * fWalkSpeedMultiplier / 2);
-        v1 += fixpoint_sub0(stru_5C6E00->Cos(angle), v81 * fWalkSpeedMultiplier / 2);
+        v2 -= fixpoint_mul(stru_5C6E00->Sin(angle), v81 * fWalkSpeedMultiplier / 2);
+        v1 += fixpoint_mul(stru_5C6E00->Cos(angle), v81 * fWalkSpeedMultiplier / 2);
         v78 = 1;
         break;
       case PARTY_StrafeRight:
-        v2 += fixpoint_sub0(stru_5C6E00->Sin(angle), v81 * fWalkSpeedMultiplier / 2);
-        v1 -= fixpoint_sub0(stru_5C6E00->Cos(angle), v81 * fWalkSpeedMultiplier / 2);
+        v2 += fixpoint_mul(stru_5C6E00->Sin(angle), v81 * fWalkSpeedMultiplier / 2);
+        v1 -= fixpoint_mul(stru_5C6E00->Cos(angle), v81 * fWalkSpeedMultiplier / 2);
         v78 = 1;
         break;
       case PARTY_WalkForward:
-        v2 += fixpoint_sub0(stru_5C6E00->Cos(angle), 5 * v81 * fWalkSpeedMultiplier);
-        v1 += fixpoint_sub0(stru_5C6E00->Sin(angle), 5 * v81 * fWalkSpeedMultiplier);
+        v2 += fixpoint_mul(stru_5C6E00->Cos(angle), 5 * v81 * fWalkSpeedMultiplier);
+        v1 += fixpoint_mul(stru_5C6E00->Sin(angle), 5 * v81 * fWalkSpeedMultiplier);
         v78 = 1;
         break;
       case PARTY_WalkBackward:
-        v2 -= fixpoint_sub0(stru_5C6E00->Cos(angle), v81 * fBackwardWalkSpeedMultiplier);
-        v1 -= fixpoint_sub0(stru_5C6E00->Sin(angle), v81 * fBackwardWalkSpeedMultiplier);
+        v2 -= fixpoint_mul(stru_5C6E00->Cos(angle), v81 * fBackwardWalkSpeedMultiplier);
+        v1 -= fixpoint_mul(stru_5C6E00->Sin(angle), v81 * fBackwardWalkSpeedMultiplier);
         v78 = 1;
         break;
       case PARTY_RunForward:
-        v2 += fixpoint_sub0(stru_5C6E00->Cos(angle), 2 * v81 * fWalkSpeedMultiplier);
-        v1 += fixpoint_sub0(stru_5C6E00->Sin(angle), 2 * v81 * fWalkSpeedMultiplier);
+        v2 += fixpoint_mul(stru_5C6E00->Cos(angle), 2 * v81 * fWalkSpeedMultiplier);
+        v1 += fixpoint_mul(stru_5C6E00->Sin(angle), 2 * v81 * fWalkSpeedMultiplier);
         v72 = 1;
         break;
       case PARTY_RunBackward:
         //v32 = stru_5C6E00->SinCos(angle);
         //v33 = (double)v81;
         //v88 = (double)v81;
-        v2 -= fixpoint_sub0(stru_5C6E00->Cos(angle), v81 * fBackwardWalkSpeedMultiplier);
+        v2 -= fixpoint_mul(stru_5C6E00->Cos(angle), v81 * fBackwardWalkSpeedMultiplier);
         //v34 = stru_5C6E00->SinCos(angle - stru_5C6E00->uIntegerHalfPi);
-        v1 -= fixpoint_sub0(stru_5C6E00->Sin(angle), v81 * fBackwardWalkSpeedMultiplier);
+        v1 -= fixpoint_mul(stru_5C6E00->Sin(angle), v81 * fBackwardWalkSpeedMultiplier);
         v72 = 1;
         break;
       case PARTY_LookUp:
@@ -2693,10 +2693,10 @@
     }
     else
     {
-      _angle_x = pX + fixpoint_sub0(stru_721530.field_7C, stru_721530.direction.x);
-      _angle_y = pY + fixpoint_sub0(stru_721530.field_7C, stru_721530.direction.y);
-      pModel = (BSPModel *)fixpoint_sub0(stru_721530.field_7C, stru_721530.direction.z);
-      v40 = fixpoint_sub0(stru_721530.field_7C, stru_721530.direction.z) + pZ;
+      _angle_x = pX + fixpoint_mul(stru_721530.field_7C, stru_721530.direction.x);
+      _angle_y = pY + fixpoint_mul(stru_721530.field_7C, stru_721530.direction.y);
+      pModel = (BSPModel *)fixpoint_mul(stru_721530.field_7C, stru_721530.direction.z);
+      v40 = fixpoint_mul(stru_721530.field_7C, stru_721530.direction.z) + pZ;
     }
     v122 = v40;
     ODM_GetFloorLevel(_angle_x, _angle_y, v40, pParty->uPartyHeight, &is_on_water, &bmodel_standing_on_pid, 0);
@@ -5448,8 +5448,8 @@
 
     v37 += ((unsigned __int64)(pSkyPolygon.ptr_38->field_10 * v13) >> 16);
     screen_center_x += ((unsigned __int64)(pSkyPolygon.ptr_38->field_1C * v13) >> 16);
-    v35 = 224 * pMiscTimer->uTotalGameTimeElapsed + fixpoint_sub0(v37, pShading) / 8;
-    screen_center_x = 224 * pMiscTimer->uTotalGameTimeElapsed + fixpoint_sub0(screen_center_x, pShading) / 8;
+    v35 = 224 * pMiscTimer->uTotalGameTimeElapsed + fixpoint_mul(v37, pShading) / 8;
+    screen_center_x = 224 * pMiscTimer->uTotalGameTimeElapsed + fixpoint_mul(screen_center_x, pShading) / 8;
 
     //array_50AC10[i].vWorldViewPosition.x = pODMRenderParams->shading_dist_mist;
     //array_50AC10[i].vWorldPosition.x = v36 / (pSky.pTexture->uTextureHeight * 65536.0);
@@ -6065,7 +6065,7 @@
       v15 = grid_x2 - a1;
       v13 = grid_z1 - a2;
     }
-    return v14 + v8 + fixpoint_sub0(v13, (v10 - v8) * 128) + fixpoint_sub0(v15, (v9 - v8) * 128);
+    return v14 + v8 + fixpoint_mul(v13, (v10 - v8) * 128) + fixpoint_mul(v15, (v9 - v8) * 128);
   }
   else
     return y_x1z1;
@@ -6153,10 +6153,10 @@
   v24 = pGame->pIndoorCameraD3D->int_cosine_y * -pGame->pIndoorCameraD3D->vPartyPos.y - pGame->pIndoorCameraD3D->int_sine_y * -pGame->pIndoorCameraD3D->vPartyPos.x;
   if (pGame->pIndoorCameraD3D->sRotationX)
   {
-    this->field_0_party_dir_x = fixpoint_sub0(v11, pGame->pIndoorCameraD3D->int_cosine_x) +
-                                fixpoint_sub0((-pGame->pIndoorCameraD3D->vPartyPos.z) << 16, pGame->pIndoorCameraD3D->int_sine_x);
+    this->field_0_party_dir_x = fixpoint_mul(v11, pGame->pIndoorCameraD3D->int_cosine_x) +
+                                fixpoint_mul((-pGame->pIndoorCameraD3D->vPartyPos.z) << 16, pGame->pIndoorCameraD3D->int_sine_x);
     this->field_4_party_dir_y = v24;
-    this->field_8_party_dir_z = fixpoint_sub0((-pGame->pIndoorCameraD3D->vPartyPos.z) << 16, v25) - fixpoint_sub0(v11, v27);
+    this->field_8_party_dir_z = fixpoint_mul((-pGame->pIndoorCameraD3D->vPartyPos.z) << 16, v25) - fixpoint_mul(v11, v27);
   }
   else
   {
@@ -6167,31 +6167,31 @@
 
   if (pGame->pIndoorCameraD3D->sRotationX)
   {
-    v17 = fixpoint_sub0(a2, v9) + fixpoint_sub0(a3, v7);
-
-    this->field_C = fixpoint_sub0(v17, v25) + fixpoint_sub0(a4, v27);
-    this->field_10 = fixpoint_sub0(a3, v9) - fixpoint_sub0(a2, v7);
-    this->field_14 = fixpoint_sub0(a4, v25) - fixpoint_sub0(v17, v27);
+    v17 = fixpoint_mul(a2, v9) + fixpoint_mul(a3, v7);
+
+    this->field_C = fixpoint_mul(v17, v25) + fixpoint_mul(a4, v27);
+    this->field_10 = fixpoint_mul(a3, v9) - fixpoint_mul(a2, v7);
+    this->field_14 = fixpoint_mul(a4, v25) - fixpoint_mul(v17, v27);
   }
   else
   {
-    this->field_C = fixpoint_sub0(a2, v9) + fixpoint_sub0(a3, v7);
-    this->field_10 = fixpoint_sub0(a3, v9) - fixpoint_sub0(a2, v7);
+    this->field_C = fixpoint_mul(a2, v9) + fixpoint_mul(a3, v7);
+    this->field_10 = fixpoint_mul(a3, v9) - fixpoint_mul(a2, v7);
     this->field_14 = a4;
   }
 
   if (pGame->pIndoorCameraD3D->sRotationX)
   {
-    v19 = fixpoint_sub0(a5, v9) + fixpoint_sub0(a6, v7);
-
-    this->field_18 = fixpoint_sub0(v19, v25) + fixpoint_sub0(a7, v27);
-    this->field_1C = fixpoint_sub0(a6, v9) - fixpoint_sub0(a5, v7);
-    this->field_20 = fixpoint_sub0(a7, v25) - fixpoint_sub0(v19, v27);
+    v19 = fixpoint_mul(a5, v9) + fixpoint_mul(a6, v7);
+
+    this->field_18 = fixpoint_mul(v19, v25) + fixpoint_mul(a7, v27);
+    this->field_1C = fixpoint_mul(a6, v9) - fixpoint_mul(a5, v7);
+    this->field_20 = fixpoint_mul(a7, v25) - fixpoint_mul(v19, v27);
   }
   else
   {
-    this->field_18 = fixpoint_sub0(a5, v9) + fixpoint_sub0(a6, v7);
-    this->field_1C = fixpoint_sub0(a6, v9) - fixpoint_sub0(a5, v7);
+    this->field_18 = fixpoint_mul(a5, v9) + fixpoint_mul(a6, v7);
+    this->field_1C = fixpoint_mul(a6, v9) - fixpoint_mul(a5, v7);
     this->field_20 = a7;
   }
 
--- a/mm7_4.cpp	Tue Sep 17 22:10:06 2013 +0200
+++ b/mm7_4.cpp	Tue Sep 17 23:10:07 2013 +0200
@@ -363,7 +363,7 @@
                       if ( v9 > 0 )
                       {
                         v10 = v1->vPosition.z;
-                        v11 = stru_721530.normal.z + fixpoint_sub0(stru_721530.direction.z, v9);
+                        v11 = stru_721530.normal.z + fixpoint_mul(stru_721530.direction.z, v9);
                         if ( v11 >= v10 )
                         {
                           if ( v11 <= v18 + v10 )
--- a/mm7_5.cpp	Tue Sep 17 22:10:06 2013 +0200
+++ b/mm7_5.cpp	Tue Sep 17 23:10:07 2013 +0200
@@ -4476,9 +4476,9 @@
 		continue;
 	}
 	  
-	v32 = fixpoint_sub0(v29->pFacePlane_old.vNormal.x,v49);
-	v33 = fixpoint_sub0(v29->pFacePlane_old.vNormal.z,v47);
-	v34 = fixpoint_sub0(v29->pFacePlane_old.vNormal.y,v48);
+	v32 = fixpoint_mul(v29->pFacePlane_old.vNormal.x,v49);
+	v33 = fixpoint_mul(v29->pFacePlane_old.vNormal.z,v47);
+	v34 = fixpoint_mul(v29->pFacePlane_old.vNormal.y,v48);
 	v59 = v32 + v33 + v34;
 	if ( v59 )
 	{
@@ -4504,7 +4504,7 @@
 		if( abs(v38) >> 14 > abs(v59) )
 			continue;
 
-		v58 = fixpoint_sub2(v38,v59);
+		v58 = fixpoint_div(v38,v59);
 
 		if( v58 < 0 )
 		{
@@ -4512,9 +4512,9 @@
 		}
 
 		if(!sub_4075DB(
-				obj1_x + ((fixpoint_sub0(v49,v58) + 32768) >> 16),
-				obj1_y + ((fixpoint_sub0(v48,v58) + 32768) >> 16),
-				obj1_z + ((fixpoint_sub0(v47,v58) + 32768) >> 16),
+				obj1_x + ((fixpoint_mul(v49,v58) + 32768) >> 16),
+				obj1_y + ((fixpoint_mul(v48,v58) + 32768) >> 16),
+				obj1_z + ((fixpoint_mul(v47,v58) + 32768) >> 16),
 				v29) )
 		{
 			continue;
@@ -4637,8 +4637,8 @@
           //                + 32768) >> 16) >= a4a) )
 		  else
 		  {
-			v25 = fixpoint_sub2(dword_4F5D98_xs[i + 1] - dword_4F5D98_xs[i], dword_4F5CC8_ys[i + 1] - dword_4F5CC8_ys[i]);
-			if( dword_4F5D98_xs[i] + (fixpoint_sub0(v25, (v8 - dword_4F5CC8_ys[i]) << 16) + 32768 >> 16) >= a4a)
+			v25 = fixpoint_div(dword_4F5D98_xs[i + 1] - dword_4F5D98_xs[i], dword_4F5CC8_ys[i + 1] - dword_4F5CC8_ys[i]);
+			if( dword_4F5D98_xs[i] + (fixpoint_mul(v25, (v8 - dword_4F5CC8_ys[i]) << 16) + 32768 >> 16) >= a4a)
 				++a3a;
 		  }
       }