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- /*
- ===========================================================================
- Copyright (C) 1999-2005 Id Software, Inc.
- This file is part of Quake III Arena source code.
- Quake III Arena source code is free software; you can redistribute it
- and/or modify it under the terms of the GNU General Public License as
- published by the Free Software Foundation; either version 2 of the License,
- or (at your option) any later version.
- Quake III Arena source code is distributed in the hope that it will be
- useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with Foobar; if not, write to the Free Software
- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- ===========================================================================
- */
- #include "qbsp.h"
- #include "../botlib/aasfile.h"
- #include "aas_create.h"
- //===========================================================================
- //
- // Parameter: -
- // Returns: -
- // Changes Globals: -
- //===========================================================================
- int AAS_TryMergeFaces(tmp_face_t *face1, tmp_face_t *face2)
- {
- winding_t *neww;
- #ifdef DEBUG
- if (!face1->winding) Error("face1 %d without winding", face1->num);
- if (!face2->winding) Error("face2 %d without winding", face2->num);
- #endif //DEBUG
- //
- if (face1->faceflags != face2->faceflags) return false;
- //NOTE: if the front or back area is zero this doesn't mean there's
- //a real area. It means there's solid at that side of the face
- //if both faces have the same front area
- if (face1->frontarea == face2->frontarea)
- {
- //if both faces have the same back area
- if (face1->backarea == face2->backarea)
- {
- //if the faces are in the same plane
- if (face1->planenum == face2->planenum)
- {
- //if they have both a front and a back area (no solid on either side)
- if (face1->frontarea && face1->backarea)
- {
- neww = MergeWindings(face1->winding, face2->winding,
- mapplanes[face1->planenum].normal);
- } //end if
- else
- {
- //this function is to be found in l_poly.c
- neww = TryMergeWinding(face1->winding, face2->winding,
- mapplanes[face1->planenum].normal);
- } //end else
- if (neww)
- {
- FreeWinding(face1->winding);
- face1->winding = neww;
- if (face2->frontarea) AAS_RemoveFaceFromArea(face2, face2->frontarea);
- if (face2->backarea) AAS_RemoveFaceFromArea(face2, face2->backarea);
- AAS_FreeTmpFace(face2);
- return true;
- } //end if
- } //end if
- else if ((face1->planenum & ~1) == (face2->planenum & ~1))
- {
- Log_Write("face %d and %d, same front and back area but flipped planes\r\n",
- face1->num, face2->num);
- } //end if
- } //end if
- } //end if
- return false;
- } //end of the function AAS_TryMergeFaces
- /*
- int AAS_TryMergeFaces(tmp_face_t *face1, tmp_face_t *face2)
- {
- winding_t *neww;
- #ifdef DEBUG
- if (!face1->winding) Error("face1 %d without winding", face1->num);
- if (!face2->winding) Error("face2 %d without winding", face2->num);
- #endif //DEBUG
- //if the faces are in the same plane
- if ((face1->planenum & ~1) != (face2->planenum & ~1)) return false;
- // if (face1->planenum != face2->planenum) return false;
- //NOTE: if the front or back area is zero this doesn't mean there's
- //a real area. It means there's solid at that side of the face
- //if both faces have the same front area
- if (face1->frontarea != face2->frontarea ||
- face1->backarea != face2->backarea)
- {
- if (!face1->frontarea || !face1->backarea ||
- !face2->frontarea || !face2->backarea) return false;
- else if (face1->frontarea != face2->backarea ||
- face1->backarea != face2->frontarea) return false;
- // return false;
- } //end if
- //this function is to be found in l_poly.c
- neww = TryMergeWinding(face1->winding, face2->winding,
- mapplanes[face1->planenum].normal);
- if (!neww) return false;
- //
- FreeWinding(face1->winding);
- face1->winding = neww;
- //remove face2
- if (face2->frontarea)
- AAS_RemoveFaceFromArea(face2, &tmpaasworld.areas[face2->frontarea]);
- if (face2->backarea)
- AAS_RemoveFaceFromArea(face2, &tmpaasworld.areas[face2->backarea]);
- return true;
- } //end of the function AAS_TryMergeFaces*/
- //===========================================================================
- //
- // Parameter: -
- // Returns: -
- // Changes Globals: -
- //===========================================================================
- void AAS_MergeAreaFaces(void)
- {
- int num_facemerges = 0;
- int side1, side2, restart;
- tmp_area_t *tmparea, *lasttmparea;
- tmp_face_t *face1, *face2;
- Log_Write("AAS_MergeAreaFaces\r\n");
- qprintf("%6d face merges", num_facemerges);
- //NOTE: first convex area is a dummy
- lasttmparea = tmpaasworld.areas;
- for (tmparea = tmpaasworld.areas; tmparea; tmparea = tmparea->l_next)
- {
- restart = false;
- //
- if (tmparea->invalid) continue;
- //
- for (face1 = tmparea->tmpfaces; face1; face1 = face1->next[side1])
- {
- side1 = face1->frontarea != tmparea;
- for (face2 = face1->next[side1]; face2; face2 = face2->next[side2])
- {
- side2 = face2->frontarea != tmparea;
- //if succesfully merged
- if (AAS_TryMergeFaces(face1, face2))
- {
- //start over again after merging two faces
- restart = true;
- num_facemerges++;
- qprintf("\r%6d", num_facemerges);
- AAS_CheckArea(tmparea);
- break;
- } //end if
- } //end for
- if (restart)
- {
- tmparea = lasttmparea;
- break;
- } //end if
- } //end for
- lasttmparea = tmparea;
- } //end for
- qprintf("\n");
- Log_Write("%6d face merges\r\n", num_facemerges);
- } //end of the function AAS_MergeAreaFaces
- //===========================================================================
- //
- // Parameter: -
- // Returns: -
- // Changes Globals: -
- //===========================================================================
- void AAS_MergePlaneFaces(tmp_area_t *tmparea, int planenum)
- {
- tmp_face_t *face1, *face2, *nextface2;
- winding_t *neww;
- int side1, side2;
- for (face1 = tmparea->tmpfaces; face1; face1 = face1->next[side1])
- {
- side1 = face1->frontarea != tmparea;
- if (face1->planenum != planenum) continue;
- //
- for (face2 = face1->next[side1]; face2; face2 = nextface2)
- {
- side2 = face2->frontarea != tmparea;
- nextface2 = face2->next[side2];
- //
- if ((face2->planenum & ~1) != (planenum & ~1)) continue;
- //
- neww = MergeWindings(face1->winding, face2->winding,
- mapplanes[face1->planenum].normal);
- FreeWinding(face1->winding);
- face1->winding = neww;
- if (face2->frontarea) AAS_RemoveFaceFromArea(face2, face2->frontarea);
- if (face2->backarea) AAS_RemoveFaceFromArea(face2, face2->backarea);
- AAS_FreeTmpFace(face2);
- //
- nextface2 = face1->next[side1];
- } //end for
- } //end for
- } //end of the function AAS_MergePlaneFaces
- //===========================================================================
- //
- // Parameter: -
- // Returns: -
- // Changes Globals: -
- //===========================================================================
- int AAS_CanMergePlaneFaces(tmp_area_t *tmparea, int planenum)
- {
- tmp_area_t *frontarea, *backarea;
- tmp_face_t *face1;
- int side1, merge, faceflags;
- frontarea = backarea = NULL;
- merge = false;
- for (face1 = tmparea->tmpfaces; face1; face1 = face1->next[side1])
- {
- side1 = face1->frontarea != tmparea;
- if ((face1->planenum & ~1) != (planenum & ~1)) continue;
- if (!frontarea && !backarea)
- {
- frontarea = face1->frontarea;
- backarea = face1->backarea;
- faceflags = face1->faceflags;
- } //end if
- else
- {
- if (frontarea != face1->frontarea) return false;
- if (backarea != face1->backarea) return false;
- if (faceflags != face1->faceflags) return false;
- merge = true;
- } //end else
- } //end for
- return merge;
- } //end of the function AAS_CanMergePlaneFaces
- //===========================================================================
- //
- // Parameter: -
- // Returns: -
- // Changes Globals: -
- //===========================================================================
- void AAS_MergeAreaPlaneFaces(void)
- {
- int num_facemerges = 0;
- int side1;
- tmp_area_t *tmparea, *nexttmparea;
- tmp_face_t *face1;
- Log_Write("AAS_MergePlaneFaces\r\n");
- qprintf("%6d plane face merges", num_facemerges);
- //NOTE: first convex area is a dummy
- for (tmparea = tmpaasworld.areas; tmparea; tmparea = nexttmparea)
- {
- nexttmparea = tmparea->l_next;
- //
- if (tmparea->invalid) continue;
- //
- for (face1 = tmparea->tmpfaces; face1; face1 = face1->next[side1])
- {
- side1 = face1->frontarea != tmparea;
- //
- if (AAS_CanMergePlaneFaces(tmparea, face1->planenum))
- {
- AAS_MergePlaneFaces(tmparea, face1->planenum);
- nexttmparea = tmparea;
- num_facemerges++;
- qprintf("\r%6d", num_facemerges);
- break;
- } //end if
- } //end for
- } //end for
- qprintf("\n");
- Log_Write("%6d plane face merges\r\n", num_facemerges);
- } //end of the function AAS_MergeAreaPlaneFaces
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