Hexen|Fixed: Fog cloud movement

The movement of fog clouds is now smooth on the Z axis. The original implementation just added an offset to the Z coordinate at 4 tic intervals.
skyjake · Aug 27, 2012 · 663477f · 663477f
1 parent fc9f887
commit 663477f
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Showing 2 changed files with 10 additions and 3 deletions.
diff --git a/doomsday/plugins/jhexen/src/a_action.c b/doomsday/plugins/jhexen/src/a_action.c
@@ -506,7 +506,7 @@ void C_DECL A_FogSpawn(mobj_t* actor)
 void C_DECL A_FogMove(mobj_t* actor)
 {
     coord_t speed = (coord_t) actor->args[0];
-    uint an, weaveindex;
+    uint an;
 
     if(!(actor->args[4]))
         return;
@@ -517,10 +517,14 @@ void C_DECL A_FogMove(mobj_t* actor)
         return;
     }
 
+    // Move the fog slightly/slowly up and down. Some fog patches are supposed
+    // to move higher and some are supposed to stay close to the ground.
+    // Unlike in the original Hexen, the move is done by applying momentum
+    // to the cloud so that the movement is smooth.
     if((actor->args[3] % 4) == 0)
     {
-        weaveindex = actor->special2;
-        actor->origin[VZ] += FLOATBOBOFFSET(weaveindex) * 2;
+        uint weaveindex = actor->special2;
+        actor->mom[VZ] = FLOATBOBOFFSET(weaveindex) / TICSPERSEC;
         actor->special2 = (weaveindex + 1) & 63;
     }
 

diff --git a/doomsday/plugins/jhexen/src/p_mobj.c b/doomsday/plugins/jhexen/src/p_mobj.c
@@ -1505,6 +1505,9 @@ boolean P_HitFloor(mobj_t* thing)
     case MT_LEAF2:
     case MT_SPLASH:
     case MT_SLUDGECHUNK:
+    case MT_FOGPATCHS:
+    case MT_FOGPATCHM:
+    case MT_FOGPATCHL:
         return false;
 
     default: