mirror of
https://github.com/nzp-team/vhlt.git
synced 2024-11-28 14:53:55 +00:00
470 lines
13 KiB
C++
470 lines
13 KiB
C++
#include "bsp5.h"
|
|
|
|
// SubdivideFace
|
|
|
|
// InitHash
|
|
// HashVec
|
|
|
|
// GetVertex
|
|
// GetEdge
|
|
// MakeFaceEdges
|
|
|
|
static int subdivides;
|
|
|
|
/* a surface has all of the faces that could be drawn on a given plane
|
|
the outside filling stage can remove some of them so a better bsp can be generated */
|
|
|
|
// =====================================================================================
|
|
// SubdivideFace
|
|
// If the face is >256 in either texture direction, carve a valid sized
|
|
// piece off and insert the remainder in the next link
|
|
// =====================================================================================
|
|
void SubdivideFace(face_t* f, face_t** prevptr)
|
|
{
|
|
vec_t mins, maxs;
|
|
vec_t v;
|
|
int axis;
|
|
int i;
|
|
dplane_t plane;
|
|
face_t* front;
|
|
face_t* back;
|
|
face_t* next;
|
|
texinfo_t* tex;
|
|
vec3_t temp;
|
|
|
|
// special (non-surface cached) faces don't need subdivision
|
|
|
|
#ifdef HLCSG_HLBSP_VOIDTEXINFO
|
|
if (f->texturenum == -1)
|
|
{
|
|
return;
|
|
}
|
|
#endif
|
|
tex = &g_texinfo[f->texturenum];
|
|
|
|
if (tex->flags & TEX_SPECIAL)
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (f->facestyle == face_hint)
|
|
{
|
|
return;
|
|
}
|
|
if (f->facestyle == face_skip)
|
|
{
|
|
return;
|
|
}
|
|
|
|
#ifdef ZHLT_NULLTEX // AJM
|
|
if (f->facestyle == face_null)
|
|
return; // ideally these should have their tex_special flag set, so its here jic
|
|
#endif
|
|
#ifdef HLCSG_HLBSP_SOLIDHINT
|
|
if (f->facestyle == face_discardable)
|
|
return;
|
|
#endif
|
|
|
|
for (axis = 0; axis < 2; axis++)
|
|
{
|
|
while (1)
|
|
{
|
|
#ifdef HLBSP_SUBDIVIDE_INMID
|
|
const int maxlightmapsize = g_subdivide_size / TEXTURE_STEP + 1;
|
|
int lightmapmins, lightmapmaxs;
|
|
if (f->numpoints == 0)
|
|
{
|
|
break;
|
|
}
|
|
for (i = 0; i < f->numpoints; i++)
|
|
{
|
|
v = DotProduct (f->pts[i], tex->vecs[axis]) + tex->vecs[axis][3];
|
|
if (i == 0 || v < mins)
|
|
{
|
|
mins = v;
|
|
}
|
|
if (i == 0 || v > maxs)
|
|
{
|
|
maxs = v;
|
|
}
|
|
}
|
|
lightmapmins = (int)floor (mins / TEXTURE_STEP - 0.05); // the worst case
|
|
lightmapmaxs = (int)ceil (maxs / TEXTURE_STEP + 0.05); // the worst case
|
|
if (lightmapmaxs - lightmapmins <= maxlightmapsize)
|
|
{
|
|
break;
|
|
}
|
|
#else
|
|
#ifdef ZHLT_64BIT_FIX
|
|
mins = 99999999;
|
|
maxs = -99999999;
|
|
#else
|
|
mins = 999999;
|
|
maxs = -999999;
|
|
#endif
|
|
|
|
for (i = 0; i < f->numpoints; i++)
|
|
{
|
|
v = DotProduct(f->pts[i], tex->vecs[axis]);
|
|
if (v < mins)
|
|
{
|
|
mins = v;
|
|
}
|
|
if (v > maxs)
|
|
{
|
|
maxs = v;
|
|
}
|
|
}
|
|
|
|
if ((maxs - mins) <= g_subdivide_size)
|
|
{
|
|
break;
|
|
}
|
|
#endif
|
|
|
|
// split it
|
|
subdivides++;
|
|
|
|
VectorCopy(tex->vecs[axis], temp);
|
|
v = VectorNormalize(temp);
|
|
|
|
VectorCopy(temp, plane.normal);
|
|
#ifdef HLBSP_SUBDIVIDE_INMID
|
|
int splitpos;
|
|
if ((lightmapmaxs - lightmapmins - 1) - (maxlightmapsize - 1) < (maxlightmapsize - 1) / 4) // don't create very thin face
|
|
{
|
|
splitpos = lightmapmins + (maxlightmapsize - 1) - (maxlightmapsize - 1) / 4;
|
|
}
|
|
else
|
|
{
|
|
splitpos = lightmapmins + (maxlightmapsize - 1);
|
|
}
|
|
plane.dist = ((splitpos + 0.5) * TEXTURE_STEP - tex->vecs[axis][3]) / v;
|
|
#else
|
|
plane.dist = (mins + g_subdivide_size - TEXTURE_STEP) / v; //plane.dist = (mins + g_subdivide_size - 16) / v; //--vluzacn
|
|
#endif
|
|
next = f->next;
|
|
SplitFace(f, &plane, &front, &back);
|
|
if (!front || !back)
|
|
{
|
|
Developer(DEVELOPER_LEVEL_SPAM, "SubdivideFace: didn't split the %d-sided polygon @(%.0f,%.0f,%.0f)",
|
|
f->numpoints, f->pts[0][0], f->pts[0][1], f->pts[0][2]);
|
|
#ifndef HLBSP_SubdivideFace_FIX
|
|
break;
|
|
#endif
|
|
}
|
|
#ifdef HLBSP_SubdivideFace_FIX
|
|
f = next;
|
|
if (front)
|
|
{
|
|
front->next = f;
|
|
f = front;
|
|
}
|
|
if (back)
|
|
{
|
|
back->next = f;
|
|
f = back;
|
|
}
|
|
*prevptr = f;
|
|
#else
|
|
*prevptr = back;
|
|
back->next = front;
|
|
front->next = next;
|
|
f = back;
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
|
|
//===========================================================================
|
|
|
|
typedef struct hashvert_s
|
|
{
|
|
struct hashvert_s* next;
|
|
vec3_t point;
|
|
int num;
|
|
int numplanes; // for corner determination
|
|
int planenums[2];
|
|
int numedges;
|
|
}
|
|
hashvert_t;
|
|
|
|
// #define POINT_EPSILON 0.01
|
|
#define POINT_EPSILON (ON_EPSILON / 2) //#define POINT_EPSILON ON_EPSILON //--vluzacn
|
|
|
|
static hashvert_t hvertex[MAX_MAP_VERTS];
|
|
static hashvert_t* hvert_p;
|
|
|
|
static face_t* edgefaces[MAX_MAP_EDGES][2];
|
|
static int firstmodeledge = 1;
|
|
static int firstmodelface;
|
|
|
|
//============================================================================
|
|
|
|
#define NUM_HASH 4096
|
|
|
|
static hashvert_t* hashverts[NUM_HASH];
|
|
|
|
static vec3_t hash_min;
|
|
static vec3_t hash_scale;
|
|
#ifdef HLBSP_HASH_FIX
|
|
// It's okay if the coordinates go under hash_min, because they are hashed in a cyclic way (modulus by hash_numslots)
|
|
// So please don't change the hardcoded hash_min and scale
|
|
static int hash_numslots[3];
|
|
#define MAX_HASH_NEIGHBORS 4
|
|
#endif
|
|
|
|
// =====================================================================================
|
|
// InitHash
|
|
// =====================================================================================
|
|
static void InitHash()
|
|
{
|
|
vec3_t size;
|
|
vec_t volume;
|
|
vec_t scale;
|
|
int newsize[2];
|
|
int i;
|
|
|
|
memset(hashverts, 0, sizeof(hashverts));
|
|
|
|
for (i = 0; i < 3; i++)
|
|
{
|
|
hash_min[i] = -8000;
|
|
size[i] = 16000;
|
|
}
|
|
|
|
volume = size[0] * size[1];
|
|
|
|
scale = sqrt(volume / NUM_HASH);
|
|
|
|
#ifdef HLBSP_HASH_FIX
|
|
hash_numslots[0] = (int)floor (size[0] / scale);
|
|
hash_numslots[1] = (int)floor (size[1] / scale);
|
|
while (hash_numslots[0] * hash_numslots[1] > NUM_HASH)
|
|
{
|
|
Developer (DEVELOPER_LEVEL_WARNING, "hash_numslots[0] * hash_numslots[1] > NUM_HASH");
|
|
hash_numslots[0]--;
|
|
hash_numslots[1]--;
|
|
}
|
|
|
|
hash_scale[0] = hash_numslots[0] / size[0];
|
|
hash_scale[1] = hash_numslots[1] / size[1];
|
|
#else
|
|
newsize[0] = size[0] / scale;
|
|
newsize[1] = size[1] / scale;
|
|
|
|
hash_scale[0] = newsize[0] / size[0];
|
|
hash_scale[1] = newsize[1] / size[1];
|
|
hash_scale[2] = newsize[1];
|
|
#endif
|
|
|
|
hvert_p = hvertex;
|
|
}
|
|
|
|
// =====================================================================================
|
|
// HashVec
|
|
// =====================================================================================
|
|
#ifdef HLBSP_HASH_FIX
|
|
static int HashVec (const vec3_t vec, int *num_hashneighbors, int *hashneighbors)
|
|
// returned value: the one bucket that a new vertex may "write" into
|
|
// returned hashneighbors: the buckets that we should "read" to check for an existing vertex
|
|
{
|
|
int h;
|
|
int i;
|
|
int x;
|
|
int y;
|
|
int slot[2];
|
|
vec_t normalized[2];
|
|
vec_t slotdiff[2];
|
|
|
|
for (i = 0; i < 2; i++)
|
|
{
|
|
normalized[i] = hash_scale[i] * (vec[i] - hash_min[i]);
|
|
slot[i] = (int)floor (normalized[i]);
|
|
slotdiff[i] = normalized[i] - (vec_t)slot[i];
|
|
|
|
slot[i] = (slot[i] + hash_numslots[i]) % hash_numslots[i];
|
|
slot[i] = (slot[i] + hash_numslots[i]) % hash_numslots[i]; // do it twice to handle negative values
|
|
}
|
|
|
|
h = slot[0] * hash_numslots[1] + slot[1];
|
|
|
|
*num_hashneighbors = 0;
|
|
for (x = -1; x <= 1; x++)
|
|
{
|
|
if (x == -1 && slotdiff[0] > hash_scale[0] * (2 * POINT_EPSILON) ||
|
|
x == 1 && slotdiff[0] < 1 - hash_scale[0] * (2 * POINT_EPSILON))
|
|
{
|
|
continue;
|
|
}
|
|
for (y = -1; y <= 1; y++)
|
|
{
|
|
if (y == -1 && slotdiff[1] > hash_scale[1] * (2 * POINT_EPSILON) ||
|
|
y == 1 && slotdiff[1] < 1 - hash_scale[1] * (2 * POINT_EPSILON))
|
|
{
|
|
continue;
|
|
}
|
|
if (*num_hashneighbors >= MAX_HASH_NEIGHBORS)
|
|
{
|
|
Error ("HashVec: internal error.");
|
|
}
|
|
hashneighbors[*num_hashneighbors] =
|
|
((slot[0] + x + hash_numslots[0]) % hash_numslots[0]) * hash_numslots[1] +
|
|
(slot[1] + y + hash_numslots[1]) % hash_numslots[1];
|
|
(*num_hashneighbors)++;
|
|
}
|
|
}
|
|
|
|
return h;
|
|
}
|
|
#else // This HashVec function was subtly but horribly wrong...
|
|
static unsigned HashVec(const vec3_t vec)
|
|
{
|
|
unsigned h;
|
|
|
|
h = hash_scale[0] * (vec[0] - hash_min[0]) * hash_scale[2] + hash_scale[1] * (vec[1] - hash_min[1]);
|
|
if (h >= NUM_HASH)
|
|
{
|
|
return NUM_HASH - 1;
|
|
}
|
|
return h;
|
|
}
|
|
#endif
|
|
|
|
// =====================================================================================
|
|
// GetVertex
|
|
// =====================================================================================
|
|
static int GetVertex(const vec3_t in, const int planenum)
|
|
{
|
|
int h;
|
|
int i;
|
|
hashvert_t* hv;
|
|
vec3_t vert;
|
|
#ifdef HLBSP_HASH_FIX
|
|
int num_hashneighbors;
|
|
int hashneighbors[MAX_HASH_NEIGHBORS];
|
|
#endif
|
|
|
|
for (i = 0; i < 3; i++)
|
|
{
|
|
if (fabs(in[i] - VectorRound(in[i])) < 0.001)
|
|
{
|
|
vert[i] = VectorRound(in[i]);
|
|
}
|
|
else
|
|
{
|
|
vert[i] = in[i];
|
|
}
|
|
}
|
|
|
|
#ifdef HLBSP_HASH_FIX
|
|
h = HashVec(vert, &num_hashneighbors, hashneighbors);
|
|
#else
|
|
h = HashVec(vert);
|
|
#endif
|
|
|
|
#ifdef HLBSP_HASH_FIX
|
|
for (i = 0; i < num_hashneighbors; i++)
|
|
for (hv = hashverts[hashneighbors[i]]; hv; hv = hv->next)
|
|
#else
|
|
for (hv = hashverts[h]; hv; hv = hv->next)
|
|
#endif
|
|
{
|
|
if (fabs(hv->point[0] - vert[0]) < POINT_EPSILON
|
|
&& fabs(hv->point[1] - vert[1]) < POINT_EPSILON && fabs(hv->point[2] - vert[2]) < POINT_EPSILON)
|
|
{
|
|
hv->numedges++;
|
|
if (hv->numplanes == 3)
|
|
{
|
|
return hv->num; // allready known to be a corner
|
|
}
|
|
for (i = 0; i < hv->numplanes; i++)
|
|
{
|
|
if (hv->planenums[i] == planenum)
|
|
{
|
|
return hv->num; // allready know this plane
|
|
}
|
|
}
|
|
if (hv->numplanes != 2)
|
|
{
|
|
hv->planenums[hv->numplanes] = planenum;
|
|
}
|
|
hv->numplanes++;
|
|
return hv->num;
|
|
}
|
|
}
|
|
|
|
hv = hvert_p;
|
|
hv->numedges = 1;
|
|
hv->numplanes = 1;
|
|
hv->planenums[0] = planenum;
|
|
hv->next = hashverts[h];
|
|
hashverts[h] = hv;
|
|
VectorCopy(vert, hv->point);
|
|
hv->num = g_numvertexes;
|
|
hlassume(hv->num != MAX_MAP_VERTS, assume_MAX_MAP_VERTS);
|
|
hvert_p++;
|
|
|
|
// emit a vertex
|
|
hlassume(g_numvertexes < MAX_MAP_VERTS, assume_MAX_MAP_VERTS);
|
|
|
|
g_dvertexes[g_numvertexes].point[0] = vert[0];
|
|
g_dvertexes[g_numvertexes].point[1] = vert[1];
|
|
g_dvertexes[g_numvertexes].point[2] = vert[2];
|
|
g_numvertexes++;
|
|
|
|
return hv->num;
|
|
}
|
|
|
|
//===========================================================================
|
|
|
|
// =====================================================================================
|
|
// GetEdge
|
|
// Don't allow four way edges
|
|
// =====================================================================================
|
|
int GetEdge(const vec3_t p1, const vec3_t p2, face_t* f)
|
|
{
|
|
int v1;
|
|
int v2;
|
|
dedge_t* edge;
|
|
int i;
|
|
|
|
hlassert(f->contents);
|
|
|
|
v1 = GetVertex(p1, f->planenum);
|
|
v2 = GetVertex(p2, f->planenum);
|
|
for (i = firstmodeledge; i < g_numedges; i++)
|
|
{
|
|
edge = &g_dedges[i];
|
|
if (v1 == edge->v[1] && v2 == edge->v[0] && !edgefaces[i][1] && edgefaces[i][0]->contents == f->contents
|
|
#ifdef HLBSP_EDGESHARE_SAMESIDE
|
|
&& edgefaces[i][0]->planenum != (f->planenum ^ 1)
|
|
&& edgefaces[i][0]->contents == f->contents
|
|
#endif
|
|
)
|
|
{
|
|
edgefaces[i][1] = f;
|
|
return -i;
|
|
}
|
|
}
|
|
|
|
// emit an edge
|
|
hlassume(g_numedges < MAX_MAP_EDGES, assume_MAX_MAP_EDGES);
|
|
edge = &g_dedges[g_numedges];
|
|
g_numedges++;
|
|
edge->v[0] = v1;
|
|
edge->v[1] = v2;
|
|
edgefaces[i][0] = f;
|
|
|
|
return i;
|
|
}
|
|
|
|
// =====================================================================================
|
|
// MakeFaceEdges
|
|
// =====================================================================================
|
|
void MakeFaceEdges()
|
|
{
|
|
InitHash();
|
|
firstmodeledge = g_numedges;
|
|
firstmodelface = g_numfaces;
|
|
}
|