fix for incorrect rounding of vertex locations when using RENDER_LOWPRECISION (now...

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@2894 d7cf8633-e32d-0410-b094-e92efae38249

diff --git a/protocol.c b/protocol.c
index 413db775bd9522dd925a8d8a0154adb7b568dad9..0e50aaebd8fa914834752ce27afa838fc0aa46c1 100644 (file)
--- a/protocol.c
+++ b/protocol.c
@@ -148,6 +148,7 @@ static entity_frame_t deltaframe; // FIXME?
 void EntityFrame_Write(entity_database_t *d, entity_frame_t *f, sizebuf_t *msg)
 {
        int i, onum, bits, number;
+       float org[3], deltaorg[3];
        entity_frame_t *o = &deltaframe;
        entity_state_t *ent, *delta, baseline;
 
@@ -185,24 +186,44 @@ void EntityFrame_Write(entity_database_t *d, entity_frame_t *f, sizebuf_t *msg)
                        delta = &baseline;
                }
                bits = 0;
+               VectorCopy(ent->origin, org);
+               VectorCopy(delta->origin, deltaorg);
                if (ent->flags & RENDER_LOWPRECISION)
                {
-                       if ((int) ent->origin[0] != (int) delta->origin[0])
-                               bits |= E_ORIGIN1;
-                       if ((int) ent->origin[1] != (int) delta->origin[1])
-                               bits |= E_ORIGIN2;
-                       if ((int) ent->origin[2] != (int) delta->origin[2])
-                               bits |= E_ORIGIN3;
+                       if (org[0] > 0)
+                               org[0] = (int) (org[0] + 0.5f);
+                       else
+                               org[0] = (int) (org[0] - 0.5f);
+                       if (org[1] > 0)
+                               org[1] = (int) (org[1] + 0.5f);
+                       else
+                               org[1] = (int) (org[1] - 0.5f);
+                       if (org[2] > 0)
+                               org[2] = (int) (org[2] + 0.5f);
+                       else
+                               org[2] = (int) (org[2] - 0.5f);
                }
-               else
+               if (delta->flags & RENDER_LOWPRECISION)
                {
-                       if (fabs(ent->origin[0] - delta->origin[0]) > 0.01f)
-                               bits |= E_ORIGIN1;
-                       if (fabs(ent->origin[1] - delta->origin[1]) > 0.01f)
-                               bits |= E_ORIGIN2;
-                       if (fabs(ent->origin[2] - delta->origin[2]) > 0.01f)
-                               bits |= E_ORIGIN3;
+                       if (deltaorg[0] > 0)
+                               deltaorg[0] = (int) (deltaorg[0] + 0.5f);
+                       else
+                               deltaorg[0] = (int) (deltaorg[0] - 0.5f);
+                       if (deltaorg[1] > 0)
+                               deltaorg[1] = (int) (deltaorg[1] + 0.5f);
+                       else
+                               deltaorg[1] = (int) (deltaorg[1] - 0.5f);
+                       if (deltaorg[2] > 0)
+                               deltaorg[2] = (int) (deltaorg[2] + 0.5f);
+                       else
+                               deltaorg[2] = (int) (deltaorg[2] - 0.5f);
                }
+               if (fabs(org[0] - deltaorg[0]) > 0.01f)
+                       bits |= E_ORIGIN1;
+               if (fabs(org[1] - deltaorg[1]) > 0.01f)
+                       bits |= E_ORIGIN2;
+               if (fabs(org[2] - deltaorg[2]) > 0.01f)
+                       bits |= E_ORIGIN3;
                if ((qbyte) (ent->angles[0] * (256.0f / 360.0f)) != (qbyte) (delta->angles[0] * (256.0f / 360.0f)))
                        bits |= E_ANGLE1;
                if ((qbyte) (ent->angles[1] * (256.0f / 360.0f)) != (qbyte) (delta->angles[1] * (256.0f / 360.0f)))
@@ -263,20 +284,20 @@ void EntityFrame_Write(entity_database_t *d, entity_frame_t *f, sizebuf_t *msg)
                        if (ent->flags & RENDER_LOWPRECISION)
                        {
                                if (bits & E_ORIGIN1)
-                                       MSG_WriteShort(msg, ent->origin[0]);
+                                       MSG_WriteShort(msg, org[0]);
                                if (bits & E_ORIGIN2)
-                                       MSG_WriteShort(msg, ent->origin[1]);
+                                       MSG_WriteShort(msg, org[1]);
                                if (bits & E_ORIGIN3)
-                                       MSG_WriteShort(msg, ent->origin[2]);
+                                       MSG_WriteShort(msg, org[2]);
                        }
                        else
                        {
                                if (bits & E_ORIGIN1)
-                                       MSG_WriteFloat(msg, ent->origin[0]);
+                                       MSG_WriteFloat(msg, org[0]);
                                if (bits & E_ORIGIN2)
-                                       MSG_WriteFloat(msg, ent->origin[1]);
+                                       MSG_WriteFloat(msg, org[1]);
                                if (bits & E_ORIGIN3)
-                                       MSG_WriteFloat(msg, ent->origin[2]);
+                                       MSG_WriteFloat(msg, org[2]);
                        }
                        if (bits & E_ANGLE1)
                                MSG_WriteAngle(msg, ent->angles[0]);