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Fix two bugs in extended segs loading, and add some error checking while I'm at it

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This commit is contained in:
MascaraSnake 2020-01-02 09:51:07 +01:00
parent 02acf6222b
commit 5ba179ad7c
1 changed files with 31 additions and 10 deletions
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41
src/p_setup.c
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@ -1840,10 +1840,13 @@ static inline float P_SegLengthFloat(seg_t *seg)
static void P_InitializeSeg(seg_t *seg) static void P_InitializeSeg(seg_t *seg)
{ {
seg->sidedef = &sides[seg->linedef->sidenum[seg->side]]; if (seg->linedef)
{
seg->sidedef = &sides[seg->linedef->sidenum[seg->side]];
seg->frontsector = seg->sidedef->sector; seg->frontsector = seg->sidedef->sector;
seg->backsector = (seg->linedef->flags & ML_TWOSIDED) ? sides[seg->linedef->sidenum[seg->side ^ 1]].sector : NULL; seg->backsector = (seg->linedef->flags & ML_TWOSIDED) ? sides[seg->linedef->sidenum[seg->side ^ 1]].sector : NULL;
}
#ifdef HWRENDER #ifdef HWRENDER
seg->pv1 = seg->pv2 = NULL; seg->pv1 = seg->pv2 = NULL;
@ -2026,15 +2029,21 @@ static boolean P_LoadExtendedSubsectorsAndSegs(UINT8 **data, nodetype_t nodetype
case NT_XGL3: case NT_XGL3:
for (m = 0; m < subsectors[i].numlines; m++, k++) for (m = 0; m < subsectors[i].numlines; m++, k++)
{ {
UINT32 vertexnum = READUINT32((*data));
UINT16 linenum; UINT16 linenum;
segs[k - 1 + ((m == 0) ? 0 : subsectors[i].numlines)].v2 = segs[k].v1 = &vertexes[READUINT32((*data))]; if (vertexnum >= numvertexes)
I_Error("P_LoadExtendedSubsectorsAndSegs: Seg %d in subsector %d has invalid vertex %d!\n", k, m, vertexnum);
(*data) += 4; // partner, can be ignored by software renderer segs[k - 1 + ((m == 0) ? subsectors[i].numlines : 0)].v2 = segs[k].v1 = &vertexes[vertexnum];
READUINT32((*data)); // partner, can be ignored by software renderer
if (nodetype == NT_XGL3) if (nodetype == NT_XGL3)
(*data) += 2; // Line number is 32-bit in XGL3, but we're limited to 16 bits. READUINT16((*data)); // Line number is 32-bit in XGL3, but we're limited to 16 bits.
linenum = READUINT16((*data)); linenum = READUINT16((*data));
if (linenum != 0xFFFF && linenum >= numlines)
I_Error("P_LoadExtendedSubsectorsAndSegs: Seg %d in subsector %d has invalid linedef %d!\n", k, m, linenum);
segs[k].glseg = (linenum == 0xFFFF); segs[k].glseg = (linenum == 0xFFFF);
segs[k].linedef = (linenum == 0xFFFF) ? NULL : &lines[linenum]; segs[k].linedef = (linenum == 0xFFFF) ? NULL : &lines[linenum];
segs[k].side = READUINT8((*data)); segs[k].side = READUINT8((*data));
@ -2044,9 +2053,20 @@ static boolean P_LoadExtendedSubsectorsAndSegs(UINT8 **data, nodetype_t nodetype
case NT_XNOD: case NT_XNOD:
for (m = 0; m < subsectors[i].numlines; m++, k++) for (m = 0; m < subsectors[i].numlines; m++, k++)
{ {
segs[k].v1 = &vertexes[READUINT32((*data))]; UINT32 v1num = READUINT32((*data));
segs[k].v2 = &vertexes[READUINT32((*data))]; UINT32 v2num = READUINT32((*data));
segs[k].linedef = &lines[READUINT16((*data))]; UINT16 linenum = READUINT16((*data));
if (v1num >= numvertexes)
I_Error("P_LoadExtendedSubsectorsAndSegs: Seg %d in subsector %d has invalid v1 %d!\n", k, m, v1num);
if (v2num >= numvertexes)
I_Error("P_LoadExtendedSubsectorsAndSegs: Seg %d in subsector %d has invalid v2 %d!\n", k, m, v2num);
if (linenum >= numlines)
I_Error("P_LoadExtendedSubsectorsAndSegs: Seg %d in subsector %d has invalid linedef %d!\n", k, m, linenum);
segs[k].v1 = &vertexes[v1num];
segs[k].v2 = &vertexes[v2num];
segs[k].linedef = &lines[linenum];
segs[k].side = READUINT8((*data)); segs[k].side = READUINT8((*data));
segs[k].glseg = false; segs[k].glseg = false;
} }
@ -2063,7 +2083,8 @@ static boolean P_LoadExtendedSubsectorsAndSegs(UINT8 **data, nodetype_t nodetype
vertex_t *v2 = seg->v2; vertex_t *v2 = seg->v2;
P_InitializeSeg(seg); P_InitializeSeg(seg);
seg->angle = R_PointToAngle2(v1->x, v1->y, v2->x, v2->y); seg->angle = R_PointToAngle2(v1->x, v1->y, v2->x, v2->y);
seg->offset = FixedHypot(v1->x - seg->linedef->v1->x, v1->y - seg->linedef->v1->y); if (seg->linedef)
segs[i].offset = FixedHypot(v1->x - seg->linedef->v1->x, v1->y - seg->linedef->v1->y);
} }
return true; return true;