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Separate retrieval of nodetype and nodes lump into its own function (Function. Not file. Sorry.)

This commit is contained in:
MascaraSnake 2019-12-29 15:50:53 +01:00
parent 8032054a47
commit 0aed60f4de
1 changed files with 62 additions and 53 deletions
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115
src/p_setup.c
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@ -1473,9 +1473,62 @@ typedef enum {
NT_ZGL2,
NT_XGL3,
NT_ZGL3,
NT_UNSUPPORTED
NT_UNSUPPORTED,
NUMNODETYPES
} nodetype_t;
// Find out the BSP format.
static nodetype_t P_GetNodetype(const virtres_t *virt, virtlump_t *virtnodes)
{
boolean supported[NUMNODETYPES];
nodetype_t nodetype = NT_UNSUPPORTED;
char signature[4 + 1];
if (vres_Find(virt, "TEXTMAP"))
{
virtnodes = vres_Find(virt, "ZNODES");
supported[NT_XGLN] = supported[NT_XGL3] = true;
}
else
{
virtlump_t *virtsegs = vres_Find(virt, "SEGS");
virtlump_t *virtssectors;
if (virtsegs && virtsegs->size)
return NT_DOOM; // Traditional map format BSP tree.
virtssectors = vres_Find(virt, "SSECTORS");
if (virtssectors && virtssectors->size)
{ // Possibly GL nodes: NODES ignored, SSECTORS takes precedence as nodes lump, (It is confusing yeah) and has a signature.
virtnodes = virtssectors;
supported[NT_XGLN] = supported[NT_ZGLN] = supported[NT_XGL3] = true;
}
else
{ // Possibly ZDoom extended nodes: SSECTORS is empty, NODES has a signature.
virtnodes = vres_Find(virt, "NODES");
supported[NT_XNOD] = supported[NT_ZNOD] = true;
}
M_Memcpy(signature, virtnodes->data, 4);
signature[4] = '\0';
virtnodes->data += 4;
}
if (!strcmp(signature, "XNOD"))
nodetype = NT_XNOD;
else if (!strcmp(signature, "ZNOD"))
nodetype = NT_ZNOD;
else if (!strcmp(signature, "XGLN"))
nodetype = NT_XGLN;
else if (!strcmp(signature, "ZGLN"))
nodetype = NT_ZGLN;
else if (!strcmp(signature, "XGL3"))
nodetype = NT_XGL3;
return supported[nodetype] ? nodetype : NT_UNSUPPORTED;
}
static void P_LoadExtendedNodes(UINT8 *data, nodetype_t nodetype)
{
size_t i, j, k;
@ -1680,60 +1733,16 @@ static void P_LoadExtendedNodes(UINT8 *data, nodetype_t nodetype)
static void P_LoadMapBSP(const virtres_t *virt)
{
virtlump_t* virtssectors = vres_Find(virt, "SSECTORS");
virtlump_t* virtsegs = vres_Find(virt, "SEGS");
virtlump_t* virtnodes = vres_Find(virt, "NODES");
nodetype_t nodetype = NT_UNSUPPORTED;
// Find out the BSP format.
if (vres_Find(virt, "TEXTMAP"))
{
virtnodes = vres_Find(virt, "ZNODES");
if (!memcmp(virtnodes->data, "XGLN", 4))
nodetype = NT_XGLN;
else if (!memcmp(virtnodes->data, "XGL3", 4))
nodetype = NT_XGL3;
}
else
{
if (!virtsegs || !virtsegs->size)
{
// Possibly ZDoom extended nodes: SSECTORS is empty, NODES has a signature.
if (!virtssectors || !virtssectors->size)
{
if (!memcmp(virtnodes->data, "XNOD", 4))
nodetype = NT_XNOD;
else if (!memcmp(virtnodes->data, "ZNOD", 4)) // Compressed variant.
nodetype = NT_ZNOD;
}
// Possibly GL nodes: NODES ignored, SSECTORS takes precedence as nodes lump, (It is confusing yeah) and has a signature.
else
{
if (!memcmp(virtssectors->data, "XGLN", 4))
{
virtnodes = virtssectors;
nodetype = NT_XGLN;
}
else if (!memcmp(virtssectors->data, "ZGLN", 4)) // Compressed variant.
{
virtnodes = virtssectors;
nodetype = NT_ZGLN;
}
else if (!memcmp(virtssectors->data, "XGL3", 4)) // Compressed variant.
{
virtnodes = virtssectors;
nodetype = NT_XGL3;
}
}
}
else // Traditional map format BSP tree.
nodetype = NT_DOOM;
}
virtlump_t *virtnodes = NULL;
nodetype_t nodetype = P_GetNodetype(virt, virtnodes);
switch (nodetype)
{
case NT_DOOM:
{
virtlump_t *virtssectors = vres_Find(virt, "SSECTORS");
virtlump_t *virtsegs = vres_Find(virt, "SEGS");
numsubsectors = virtssectors->size / sizeof(mapsubsector_t);
numnodes = virtnodes->size / sizeof(mapnode_t);
numsegs = virtsegs->size / sizeof(mapseg_t);
@ -1753,11 +1762,11 @@ static void P_LoadMapBSP(const virtres_t *virt)
P_LoadNodes(virtnodes->data);
P_LoadSegs(virtsegs->data);
break;
}
case NT_XNOD:
case NT_XGLN:
case NT_XGL3:
P_LoadExtendedNodes(virtnodes->data + 4, nodetype);
P_LoadExtendedNodes(virtnodes->data, nodetype);
break;
default:
CONS_Alert(CONS_WARNING, "Unsupported BSP format detected.\n");