/
renderva.cpp
1994 lines (1749 loc) · 63.2 KB
/
renderva.cpp
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// renderva.cpp: handles the occlusion and rendering of vertex arrays
#include "engine.h"
static inline void drawtris(GLsizei numindices, const GLvoid *indices, ushort minvert, ushort maxvert)
{
if(hasDRE) glDrawRangeElements_(GL_TRIANGLES, minvert, maxvert, numindices, GL_UNSIGNED_SHORT, indices);
else glDrawElements(GL_TRIANGLES, numindices, GL_UNSIGNED_SHORT, indices);
glde++;
}
static inline void drawvatris(vtxarray *va, GLsizei numindices, const GLvoid *indices)
{
drawtris(numindices, indices, va->minvert, va->maxvert);
}
///////// view frustrum culling ///////////////////////
extern vector<vtxarray *> varoot, valist;
plane vfcP[5]; // perpindictular vectors to view frustrum bounding planes
float vfcDfog; // far plane culling distance (fog limit).
float vfcDnear[5], vfcDfar[5];
vtxarray *visibleva = NULL;
bool isfoggedsphere(float rad, const vec &cv)
{
loopi(4) if(vfcP[i].dist(cv) < -rad) return true;
float dist = vfcP[4].dist(cv);
return dist < -rad || dist > vfcDfog + rad;
}
int isvisiblesphere(float rad, const vec &cv)
{
int v = VFC_FULL_VISIBLE;
float dist;
loopi(5)
{
dist = vfcP[i].dist(cv);
if(dist < -rad) return VFC_NOT_VISIBLE;
if(dist < rad) v = VFC_PART_VISIBLE;
}
dist -= vfcDfog;
if(dist > rad) return VFC_FOGGED; //VFC_NOT_VISIBLE; // culling when fog is closer than size of world results in HOM
if(dist > -rad) v = VFC_PART_VISIBLE;
return v;
}
static inline int ishiddencube(const ivec &o, int size)
{
loopi(5) if(o.dist(vfcP[i]) < -vfcDfar[i]*size) return true;
return false;
}
static inline int isfoggedcube(const ivec &o, int size)
{
loopi(4) if(o.dist(vfcP[i]) < -vfcDfar[i]*size) return true;
float dist = o.dist(vfcP[4]);
return dist < -vfcDfar[4]*size || dist > vfcDfog - vfcDnear[4]*size;
}
int isvisiblecube(const ivec &o, int size)
{
int v = VFC_FULL_VISIBLE;
float dist;
loopi(5)
{
dist = o.dist(vfcP[i]);
if(dist < -vfcDfar[i]*size) return VFC_NOT_VISIBLE;
if(dist < -vfcDnear[i]*size) v = VFC_PART_VISIBLE;
}
dist -= vfcDfog;
if(dist > -vfcDnear[4]*size) return VFC_FOGGED;
if(dist > -vfcDfar[4]*size) v = VFC_PART_VISIBLE;
return v;
}
static inline float vadist(vtxarray *va, const vec &p)
{
return p.dist_to_bb(va->bbmin, va->bbmax);
}
#define VASORTSIZE 64
static vtxarray *vasort[VASORTSIZE];
void addvisibleva(vtxarray *va)
{
float dist = vadist(va, camera1->o);
va->distance = int(dist); /*cv.dist(camera1->o) - va->size*SQRT3/2*/
int hash = clamp(int(dist*VASORTSIZE/worldsize), 0, VASORTSIZE-1);
vtxarray **prev = &vasort[hash], *cur = vasort[hash];
while(cur && va->distance >= cur->distance)
{
prev = &cur->next;
cur = cur->next;
}
va->next = *prev;
*prev = va;
}
void sortvisiblevas()
{
visibleva = NULL;
vtxarray **last = &visibleva;
loopi(VASORTSIZE) if(vasort[i])
{
vtxarray *va = vasort[i];
*last = va;
while(va->next) va = va->next;
last = &va->next;
}
}
void findvisiblevas(vector<vtxarray *> &vas, bool resetocclude = false)
{
loopv(vas)
{
vtxarray &v = *vas[i];
int prevvfc = resetocclude ? VFC_NOT_VISIBLE : v.curvfc;
v.curvfc = isvisiblecube(v.o, v.size);
if(v.curvfc!=VFC_NOT_VISIBLE)
{
if(pvsoccluded(v.o, v.size))
{
v.curvfc += PVS_FULL_VISIBLE - VFC_FULL_VISIBLE;
continue;
}
addvisibleva(&v);
if(v.children.length()) findvisiblevas(v.children, prevvfc>=VFC_NOT_VISIBLE);
if(prevvfc>=VFC_NOT_VISIBLE)
{
v.occluded = !v.texs ? OCCLUDE_GEOM : OCCLUDE_NOTHING;
v.query = NULL;
}
}
}
}
void findvisiblevas()
{
memset(vasort, 0, sizeof(vasort));
findvisiblevas(varoot);
sortvisiblevas();
}
void calcvfcD()
{
loopi(5)
{
plane &p = vfcP[i];
vfcDnear[i] = vfcDfar[i] = 0;
loopk(3) if(p[k] > 0) vfcDfar[i] += p[k];
else vfcDnear[i] += p[k];
}
}
void setvfcP(const vec &bbmin, const vec &bbmax)
{
vec4 px = mvpmatrix.getrow(0), py = mvpmatrix.getrow(1), pz = mvpmatrix.getrow(2), pw = mvpmatrix.getrow(3);
vfcP[0] = plane(vec4(pw).mul(-bbmin.x).add(px)).normalize(); // left plane
vfcP[1] = plane(vec4(pw).mul(bbmax.x).sub(px)).normalize(); // right plane
vfcP[2] = plane(vec4(pw).mul(-bbmin.y).add(py)).normalize(); // bottom plane
vfcP[3] = plane(vec4(pw).mul(bbmax.y).sub(py)).normalize(); // top plane
vfcP[4] = plane(vec4(pw).add(pz)).normalize(); // near/far planes
extern int fog;
vfcDfog = fog;
calcvfcD();
}
plane oldvfcP[5];
void savevfcP()
{
memcpy(oldvfcP, vfcP, sizeof(vfcP));
}
void restorevfcP()
{
memcpy(vfcP, oldvfcP, sizeof(vfcP));
calcvfcD();
}
void visiblecubes(bool cull)
{
if(cull)
{
setvfcP();
findvisiblevas();
}
else
{
memset(vfcP, 0, sizeof(vfcP));
vfcDfog = 1000000;
memset(vfcDnear, 0, sizeof(vfcDnear));
memset(vfcDfar, 0, sizeof(vfcDfar));
visibleva = NULL;
loopv(valist)
{
vtxarray *va = valist[i];
va->distance = 0;
va->curvfc = VFC_FULL_VISIBLE;
va->occluded = !va->texs ? OCCLUDE_GEOM : OCCLUDE_NOTHING;
va->query = NULL;
va->next = visibleva;
visibleva = va;
}
}
}
static inline bool insideva(const vtxarray *va, const vec &v, int margin = 2)
{
int size = va->size + margin;
return v.x>=va->o.x-margin && v.y>=va->o.y-margin && v.z>=va->o.z-margin &&
v.x<=va->o.x+size && v.y<=va->o.y+size && v.z<=va->o.z+size;
}
///////// occlusion queries /////////////
#define MAXQUERY 2048
struct queryframe
{
int cur, max;
occludequery queries[MAXQUERY];
};
static queryframe queryframes[2] = {{0, 0}, {0, 0}};
static uint flipquery = 0;
int getnumqueries()
{
return queryframes[flipquery].cur;
}
void flipqueries()
{
flipquery = (flipquery + 1) % 2;
queryframe &qf = queryframes[flipquery];
loopi(qf.cur) qf.queries[i].owner = NULL;
qf.cur = 0;
}
occludequery *newquery(void *owner)
{
queryframe &qf = queryframes[flipquery];
if(qf.cur >= qf.max)
{
if(qf.max >= MAXQUERY) return NULL;
glGenQueries_(1, &qf.queries[qf.max++].id);
}
occludequery *query = &qf.queries[qf.cur++];
query->owner = owner;
query->fragments = -1;
return query;
}
void resetqueries()
{
loopi(2) loopj(queryframes[i].max) queryframes[i].queries[j].owner = NULL;
}
void clearqueries()
{
loopi(2)
{
queryframe &qf = queryframes[i];
loopj(qf.max)
{
glDeleteQueries_(1, &qf.queries[j].id);
qf.queries[j].owner = NULL;
}
qf.cur = qf.max = 0;
}
}
VAR(oqfrags, 0, 8, 64);
VAR(oqwait, 0, 1, 1);
bool checkquery(occludequery *query, bool nowait)
{
GLuint fragments;
if(query->fragments >= 0) fragments = query->fragments;
else
{
if(nowait || !oqwait)
{
GLint avail;
glGetQueryObjectiv_(query->id, GL_QUERY_RESULT_AVAILABLE, &avail);
if(!avail) return false;
}
glGetQueryObjectuiv_(query->id, GL_QUERY_RESULT_ARB, &fragments);
query->fragments = fragments;
}
return fragments < uint(oqfrags);
}
void drawbb(const ivec &bo, const ivec &br, const vec &camera)
{
glBegin(GL_QUADS);
#define GENFACEORIENT(orient, v0, v1, v2, v3) do { \
int dim = dimension(orient); \
if(dimcoord(orient)) \
{ \
if(camera[dim] < bo[dim] + br[dim]) continue; \
} \
else if(camera[dim] > bo[dim]) continue; \
v0 v1 v2 v3 \
xtraverts += 4; \
} while(0);
#define GENFACEVERT(orient, vert, ox,oy,oz, rx,ry,rz) \
glVertex3f(ox rx, oy ry, oz rz);
GENFACEVERTS(bo.x, bo.x + br.x, bo.y, bo.y + br.y, bo.z, bo.z + br.z, , , , , , )
#undef GENFACEORIENT
#undef GENFACEVERTS
glEnd();
}
extern int octaentsize;
static octaentities *visiblemms, **lastvisiblemms;
static inline bool insideoe(const octaentities *oe, const vec &v, int margin = 1)
{
return v.x>=oe->bbmin.x-margin && v.y>=oe->bbmin.y-margin && v.z>=oe->bbmin.z-margin &&
v.x<=oe->bbmax.x+margin && v.y<=oe->bbmax.y+margin && v.z<=oe->bbmax.z+margin;
}
void findvisiblemms(const vector<extentity *> &ents)
{
visiblemms = NULL;
lastvisiblemms = &visiblemms;
for(vtxarray *va = visibleva; va; va = va->next)
{
if(va->mapmodels.empty() || va->curvfc >= VFC_FOGGED || va->occluded >= OCCLUDE_BB) continue;
loopv(va->mapmodels)
{
octaentities *oe = va->mapmodels[i];
if(isfoggedcube(oe->o, oe->size) || pvsoccluded(oe->bbmin, ivec(oe->bbmax).sub(oe->bbmin))) continue;
bool occluded = oe->query && oe->query->owner == oe && checkquery(oe->query);
if(occluded)
{
oe->distance = -1;
oe->next = NULL;
*lastvisiblemms = oe;
lastvisiblemms = &oe->next;
}
else
{
int visible = 0;
loopv(oe->mapmodels)
{
extentity &e = *ents[oe->mapmodels[i]];
if(e.flags&extentity::F_NOVIS) continue;
e.visible = true;
++visible;
}
if(!visible) continue;
oe->distance = int(camera1->o.dist_to_bb(oe->o, oe->size));
octaentities **prev = &visiblemms, *cur = visiblemms;
while(cur && cur->distance >= 0 && oe->distance > cur->distance)
{
prev = &cur->next;
cur = cur->next;
}
if(*prev == NULL) lastvisiblemms = &oe->next;
oe->next = *prev;
*prev = oe;
}
}
}
}
VAR(oqmm, 0, 4, 8);
extern bool getentboundingbox(extentity &e, ivec &o, ivec &r);
static inline void rendermapmodel(extentity &e)
{
int anim = ANIM_MAPMODEL|ANIM_LOOP, basetime = 0;
if(e.flags&extentity::F_ANIM) entities::animatemapmodel(e, anim, basetime);
rendermapmodel(e.attr2, anim, e.o, e.attr1, 0, MDL_CULL_VFC | MDL_CULL_DIST, basetime);
}
void rendermapmodels()
{
const vector<extentity *> &ents = entities::getents();
findvisiblemms(ents);
static int skipoq = 0;
bool doquery = hasOQ && oqfrags && oqmm;
for(octaentities *oe = visiblemms; oe; oe = oe->next) if(oe->distance>=0)
{
bool rendered = false;
loopv(oe->mapmodels)
{
extentity &e = *ents[oe->mapmodels[i]];
if(!e.visible) continue;
if(!rendered)
{
rendered = true;
oe->query = doquery && oe->distance>0 && !(++skipoq%oqmm) ? newquery(oe) : NULL;
if(oe->query) startmodelquery(oe->query);
}
rendermapmodel(e);
e.visible = false;
}
if(rendered && oe->query) endmodelquery();
}
rendermodelbatches();
resetmodelbatches();
bool colormask = true;
for(octaentities *oe = visiblemms; oe; oe = oe->next) if(oe->distance<0)
{
oe->query = doquery && !insideoe(oe, camera1->o) ? newquery(oe) : NULL;
if(!oe->query) continue;
if(colormask)
{
glDepthMask(GL_FALSE);
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
nocolorshader->set();
colormask = false;
}
startquery(oe->query);
drawbb(oe->bbmin, ivec(oe->bbmax).sub(oe->bbmin));
endquery(oe->query);
}
if(!colormask)
{
glDepthMask(GL_TRUE);
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
}
}
static inline bool bbinsideva(const ivec &bo, const ivec &br, vtxarray *va)
{
return bo.x >= va->bbmin.x && bo.y >= va->bbmin.y && va->o.z >= va->bbmin.z &&
bo.x + br.x <= va->bbmax.x && bo.y + br.y <= va->bbmax.y && bo.z + br.z <= va->bbmax.z;
}
static inline bool bboccluded(const ivec &bo, const ivec &br, cube *c, const ivec &o, int size)
{
loopoctabox(o, size, bo, br)
{
ivec co(i, o.x, o.y, o.z, size);
if(c[i].ext && c[i].ext->va)
{
vtxarray *va = c[i].ext->va;
if(va->curvfc >= VFC_FOGGED || (va->occluded >= OCCLUDE_BB && bbinsideva(bo, br, va))) continue;
}
if(c[i].children && bboccluded(bo, br, c[i].children, co, size>>1)) continue;
return false;
}
return true;
}
bool bboccluded(const ivec &bo, const ivec &br)
{
int diff = (bo.x^(bo.x+br.x)) | (bo.y^(bo.y+br.y)) | (bo.z^(bo.z+br.z));
if(diff&~((1<<worldscale)-1)) return false;
int scale = worldscale-1;
if(diff&(1<<scale)) return bboccluded(bo, br, worldroot, ivec(0, 0, 0), 1<<scale);
cube *c = &worldroot[octastep(bo.x, bo.y, bo.z, scale)];
if(c->ext && c->ext->va)
{
vtxarray *va = c->ext->va;
if(va->curvfc >= VFC_FOGGED || (va->occluded >= OCCLUDE_BB && bbinsideva(bo, br, va))) return true;
}
scale--;
while(c->children && !(diff&(1<<scale)))
{
c = &c->children[octastep(bo.x, bo.y, bo.z, scale)];
if(c->ext && c->ext->va)
{
vtxarray *va = c->ext->va;
if(va->curvfc >= VFC_FOGGED || (va->occluded >= OCCLUDE_BB && bbinsideva(bo, br, va))) return true;
}
scale--;
}
if(c->children) return bboccluded(bo, br, c->children, ivec(bo).mask(~((2<<scale)-1)), 1<<scale);
return false;
}
VAR(outline, 0, 0, 1);
HVARP(outlinecolour, 0, 0, 0xFFFFFF);
VAR(dtoutline, 0, 1, 1);
void renderoutline()
{
notextureshader->set();
glDisable(GL_TEXTURE_2D);
glEnableClientState(GL_VERTEX_ARRAY);
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
bvec color((outlinecolour>>16)&0xFF, (outlinecolour>>8)&0xFF, outlinecolour&0xFF);
glColor3f(color.x*ldrscaleb, color.y*ldrscaleb, color.z*ldrscaleb);
enablepolygonoffset(GL_POLYGON_OFFSET_LINE);
if(!dtoutline) glDisable(GL_DEPTH_TEST);
vtxarray *prev = NULL;
for(vtxarray *va = visibleva; va; va = va->next)
{
if(va->occluded >= OCCLUDE_BB) continue;
if((!va->texs || va->occluded >= OCCLUDE_GEOM) && !va->alphaback && !va->alphafront && !va->refracttris) continue;
if(!prev || va->vbuf != prev->vbuf)
{
if(hasVBO)
{
glBindBuffer_(GL_ARRAY_BUFFER_ARB, va->vbuf);
glBindBuffer_(GL_ELEMENT_ARRAY_BUFFER_ARB, va->ebuf);
}
glVertexPointer(3, GL_FLOAT, VTXSIZE, va->vdata[0].pos.v);
}
if(va->texs && va->occluded < OCCLUDE_GEOM)
{
drawvatris(va, 3*va->tris, va->edata);
xtravertsva += va->verts;
}
if(va->alphaback || va->alphafront || va->refract)
{
drawvatris(va, 3*(va->alphabacktris + va->alphafronttris + va->refracttris), &va->edata[3*(va->tris + va->blendtris)]);
xtravertsva += 3*(va->alphabacktris + va->alphafronttris + va->refracttris);
}
prev = va;
}
if(!dtoutline) glEnable(GL_DEPTH_TEST);
disablepolygonoffset(GL_POLYGON_OFFSET_LINE);
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
if(hasVBO)
{
glBindBuffer_(GL_ARRAY_BUFFER_ARB, 0);
glBindBuffer_(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
}
glDisableClientState(GL_VERTEX_ARRAY);
glEnable(GL_TEXTURE_2D);
defaultshader->set();
}
HVAR(blendbrushcolor, 0, 0x0000C0, 0xFFFFFF);
void renderblendbrush(GLuint tex, float x, float y, float w, float h)
{
static Shader *blendbrushshader = NULL;
if(!blendbrushshader) blendbrushshader = lookupshaderbyname("blendbrush");
blendbrushshader->set();
glEnableClientState(GL_VERTEX_ARRAY);
glDepthFunc(GL_LEQUAL);
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, tex);
bvec color((blendbrushcolor>>16)&0xFF, (blendbrushcolor>>8)&0xFF, blendbrushcolor&0xFF);
glColor4f(color.x*ldrscaleb, color.y*ldrscaleb, color.z*ldrscaleb, 0.25f);
LOCALPARAM(texgenS, (1.0f/w, 0, 0, -x/w));
LOCALPARAM(texgenT, (0, 1.0f/h, 0, -y/h));
vtxarray *prev = NULL;
for(vtxarray *va = visibleva; va; va = va->next)
{
if(!va->texs || va->occluded >= OCCLUDE_GEOM) continue;
if(va->o.x + va->size <= x || va->o.y + va->size <= y || va->o.x >= x + w || va->o.y >= y + h) continue;
if(!prev || va->vbuf != prev->vbuf)
{
if(hasVBO)
{
glBindBuffer_(GL_ARRAY_BUFFER_ARB, va->vbuf);
glBindBuffer_(GL_ELEMENT_ARRAY_BUFFER_ARB, va->ebuf);
}
glVertexPointer(3, GL_FLOAT, VTXSIZE, va->vdata[0].pos.v);
}
drawvatris(va, 3*va->tris, va->edata);
xtravertsva += va->verts;
prev = va;
}
glDisable(GL_TEXTURE_2D);
glDisable(GL_BLEND);
glDepthFunc(GL_LESS);
if(hasVBO)
{
glBindBuffer_(GL_ARRAY_BUFFER_ARB, 0);
glBindBuffer_(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
}
glDisableClientState(GL_VERTEX_ARRAY);
notextureshader->set();
}
int calcbbsidemask(const ivec &bbmin, const ivec &bbmax, const vec &lightpos, float lightradius, float bias)
{
vec pmin = bbmin.tovec().sub(lightpos).div(lightradius), pmax = bbmax.tovec().sub(lightpos).div(lightradius);
int mask = 0x3F;
float dp1 = pmax.x + pmax.y, dn1 = pmax.x - pmin.y, ap1 = fabs(dp1), an1 = fabs(dn1),
dp2 = pmin.x + pmin.y, dn2 = pmin.x - pmax.y, ap2 = fabs(dp2), an2 = fabs(dn2);
if(ap1 > bias*an1 && ap2 > bias*an2)
mask &= (3<<4)
| (dp1 >= 0 ? (1<<0)|(1<<2) : (2<<0)|(2<<2))
| (dp2 >= 0 ? (1<<0)|(1<<2) : (2<<0)|(2<<2));
if(an1 > bias*ap1 && an2 > bias*ap2)
mask &= (3<<4)
| (dn1 >= 0 ? (1<<0)|(2<<2) : (2<<0)|(1<<2))
| (dn2 >= 0 ? (1<<0)|(2<<2) : (2<<0)|(1<<2));
dp1 = pmax.y + pmax.z, dn1 = pmax.y - pmin.z, ap1 = fabs(dp1), an1 = fabs(dn1),
dp2 = pmin.y + pmin.z, dn2 = pmin.y - pmax.z, ap2 = fabs(dp2), an2 = fabs(dn2);
if(ap1 > bias*an1 && ap2 > bias*an2)
mask &= (3<<0)
| (dp1 >= 0 ? (1<<2)|(1<<4) : (2<<2)|(2<<4))
| (dp2 >= 0 ? (1<<2)|(1<<4) : (2<<2)|(2<<4));
if(an1 > bias*ap1 && an2 > bias*ap2)
mask &= (3<<0)
| (dn1 >= 0 ? (1<<2)|(2<<4) : (2<<2)|(1<<4))
| (dn2 >= 0 ? (1<<2)|(2<<4) : (2<<2)|(1<<4));
dp1 = pmax.z + pmax.x, dn1 = pmax.z - pmin.x, ap1 = fabs(dp1), an1 = fabs(dn1),
dp2 = pmin.z + pmin.x, dn2 = pmin.z - pmax.x, ap2 = fabs(dp2), an2 = fabs(dn2);
if(ap1 > bias*an1 && ap2 > bias*an2)
mask &= (3<<2)
| (dp1 >= 0 ? (1<<4)|(1<<0) : (2<<4)|(2<<0))
| (dp2 >= 0 ? (1<<4)|(1<<0) : (2<<4)|(2<<0));
if(an1 > bias*ap1 && an2 > bias*ap2)
mask &= (3<<2)
| (dn1 >= 0 ? (1<<4)|(2<<0) : (2<<4)|(1<<0))
| (dn2 >= 0 ? (1<<4)|(2<<0) : (2<<4)|(1<<0));
return mask;
}
int calcbbtetramask(const ivec &bbmin, const ivec &bbmax, const vec &lightpos, float lightradius, float bias)
{
// top 1: +1, +1, +1
// top 2: -1, -1, +1
// bot 1: +1, -1, -1,
// bot 2: -1, +1, -1
vec pmin = bbmin.tovec().sub(lightpos).div(lightradius), pmax = bbmax.tovec().sub(lightpos).div(lightradius);
int mask = 0xF;
bias *= 2;
// +x,+y top split, no bias
if(pmin.x + pmin.y > 0) mask &= ~(1<<1);
else if(pmax.x + pmax.y < 0) mask &= ~(1<<0);
// +x,-y bottom split, no bias
if(pmin.x - pmax.y > 0) mask &= ~(1<<3);
else if(pmax.x - pmin.y < 0) mask &= ~(1<<2);
// +x,-y,+z % +x,+y,-z = +y,+z top 1/bottom 1 split
if(pmin.y + pmin.z > bias) mask &= ~(1<<2);
else if(pmax.y + pmax.z < -bias) mask &= ~(1<<0);
// +x,+y,-z % -x,+y,+z = +x,+z top 1/bottom 2 split
if(pmin.x + pmin.z > bias) mask &= ~(1<<3);
else if(pmax.x + pmax.z < -bias) mask &= ~(1<<0);
// -x,-y,-z % +x,-y,+z = -x,+z top 2/bottom 1 split
if(pmin.z - pmax.x > bias) mask &= ~(1<<2);
else if(pmax.z - pmin.x < -bias) mask &= ~(1<<1);
// -x,+y,+z % -x,-y,-z = -y,+z top 2/bottom 2 split
if(pmin.z - pmax.y > bias) mask &= ~(1<<3);
else if(pmax.z - pmin.y < -bias) mask &= ~(1<<1);
return mask;
}
int calcspheresidemask(const vec &p, float radius, float bias)
{
// p is in the cubemap's local coordinate system
// bias = border/(size - border)
float dxyp = p.x + p.y, dxyn = p.x - p.y, axyp = fabs(dxyp), axyn = fabs(dxyn),
dyzp = p.y + p.z, dyzn = p.y - p.z, ayzp = fabs(dyzp), ayzn = fabs(dyzn),
dzxp = p.z + p.x, dzxn = p.z - p.x, azxp = fabs(dzxp), azxn = fabs(dzxn);
int mask = 0x3F;
radius *= SQRT2;
if(axyp > bias*axyn + radius) mask &= dxyp < 0 ? ~((1<<0)|(1<<2)) : ~((2<<0)|(2<<2));
if(axyn > bias*axyp + radius) mask &= dxyn < 0 ? ~((1<<0)|(2<<2)) : ~((2<<0)|(1<<2));
if(ayzp > bias*ayzn + radius) mask &= dyzp < 0 ? ~((1<<2)|(1<<4)) : ~((2<<2)|(2<<4));
if(ayzn > bias*ayzp + radius) mask &= dyzn < 0 ? ~((1<<2)|(2<<4)) : ~((2<<2)|(1<<4));
if(azxp > bias*azxn + radius) mask &= dzxp < 0 ? ~((1<<4)|(1<<0)) : ~((2<<4)|(2<<0));
if(azxn > bias*azxp + radius) mask &= dzxn < 0 ? ~((1<<4)|(2<<0)) : ~((2<<4)|(1<<0));
return mask;
}
int calcspheretetramask(const vec &p, float radius, float bias)
{
// p is in the cubemap's local coordinate system
// bias = border/(size - border)
int mask = 0xF;
bias *= 2;
radius *= SQRT2;
// +x,+y top split, no bias
float d = p.x + p.y;
if(fabs(d) > radius) mask &= d >= 0 ? ~(1<<1) : ~(1<<0);
// +x,-y bottom split, no bias
d = p.x - p.y;
if(fabs(d) > radius) mask &= d >= 0 ? ~(1<<3) : ~(1<<2);
// +x,-y,+z % +x,+y,-z = +y,+z top 1/bottom 1 split
d = p.y + p.z;
if(fabs(d) > radius + bias) mask &= d >= 0 ? ~(1<<2) : ~(1<<0);
// +x,+y,-z % -x,+y,+z = +x,+z top 1/bottom 2 split
d = p.x + p.z;
if(fabs(d) > radius + bias) mask &= d >= 0 ? ~(1<<3) : ~(1<<0);
// -x,-y,-z % +x,-y,+z = -x,+z top 2/bottom 1 split
d = p.z - p.x;
if(fabs(d) > radius + bias) mask &= d >= 0 ? ~(1<<2) : ~(1<<1);
// -x,+y,+z % -x,-y,-z = -y,+z top 2/bottom 2 split
d = p.z - p.y;
if(fabs(d) > radius + bias) mask &= d >= 0 ? ~(1<<3) : ~(1<<1);
return mask;
}
int calctrisidemask(const vec &p1, const vec &p2, const vec &p3, float bias)
{
// p1, p2, p3 are in the cubemap's local coordinate system
// bias = border/(size - border)
int mask = 0x3F;
float dp1 = p1.x + p1.y, dn1 = p1.x - p1.y, ap1 = fabs(dp1), an1 = fabs(dn1),
dp2 = p2.x + p2.y, dn2 = p2.x - p2.y, ap2 = fabs(dp2), an2 = fabs(dn2),
dp3 = p3.x + p3.y, dn3 = p3.x - p3.y, ap3 = fabs(dp3), an3 = fabs(dn3);
if(ap1 > bias*an1 && ap2 > bias*an2 && ap3 > bias*an3)
mask &= (3<<4)
| (dp1 >= 0 ? (1<<0)|(1<<2) : (2<<0)|(2<<2))
| (dp2 >= 0 ? (1<<0)|(1<<2) : (2<<0)|(2<<2))
| (dp3 >= 0 ? (1<<0)|(1<<2) : (2<<0)|(2<<2));
if(an1 > bias*ap1 && an2 > bias*ap2 && an3 > bias*ap3)
mask &= (3<<4)
| (dn1 >= 0 ? (1<<0)|(2<<2) : (2<<0)|(1<<2))
| (dn2 >= 0 ? (1<<0)|(2<<2) : (2<<0)|(1<<2))
| (dn3 >= 0 ? (1<<0)|(2<<2) : (2<<0)|(1<<2));
dp1 = p1.y + p1.z, dn1 = p1.y - p1.z, ap1 = fabs(dp1), an1 = fabs(dn1),
dp2 = p2.y + p2.z, dn2 = p2.y - p2.z, ap2 = fabs(dp2), an2 = fabs(dn2),
dp3 = p3.y + p3.z, dn3 = p3.y - p3.z, ap3 = fabs(dp3), an3 = fabs(dn3);
if(ap1 > bias*an1 && ap2 > bias*an2 && ap3 > bias*an3)
mask &= (3<<0)
| (dp1 >= 0 ? (1<<2)|(1<<4) : (2<<2)|(2<<4))
| (dp2 >= 0 ? (1<<2)|(1<<4) : (2<<2)|(2<<4))
| (dp3 >= 0 ? (1<<2)|(1<<4) : (2<<2)|(2<<4));
if(an1 > bias*ap1 && an2 > bias*ap2 && an3 > bias*ap3)
mask &= (3<<0)
| (dn1 >= 0 ? (1<<2)|(2<<4) : (2<<2)|(1<<4))
| (dn2 >= 0 ? (1<<2)|(2<<4) : (2<<2)|(1<<4))
| (dn3 >= 0 ? (1<<2)|(2<<4) : (2<<2)|(1<<4));
dp1 = p1.z + p1.x, dn1 = p1.z - p1.x, ap1 = fabs(dp1), an1 = fabs(dn1),
dp2 = p2.z + p2.x, dn2 = p2.z - p2.x, ap2 = fabs(dp2), an2 = fabs(dn2),
dp3 = p3.z + p3.x, dn3 = p3.z - p3.x, ap3 = fabs(dp3), an3 = fabs(dn3);
if(ap1 > bias*an1 && ap2 > bias*an2 && ap3 > bias*an3)
mask &= (3<<2)
| (dp1 >= 0 ? (1<<4)|(1<<0) : (2<<4)|(2<<0))
| (dp2 >= 0 ? (1<<4)|(1<<0) : (2<<4)|(2<<0))
| (dp3 >= 0 ? (1<<4)|(1<<0) : (2<<4)|(2<<0));
if(an1 > bias*ap1 && an2 > bias*ap2 && an3 > bias*ap3)
mask &= (3<<2)
| (dn1 >= 0 ? (1<<4)|(2<<0) : (2<<4)|(1<<0))
| (dn2 >= 0 ? (1<<4)|(2<<0) : (2<<4)|(1<<0))
| (dn3 >= 0 ? (1<<4)|(2<<0) : (2<<4)|(1<<0));
return mask;
}
int calctritetramask(const vec &p1, const vec &p2, const vec &p3, float bias)
{
// p1, p2, p3 are in the cubemap's local coordinate system
// bias = border/(size - border)
int mask = 0xF;
bias *= 2;
// +x,+y top split, no bias
float d1 = p1.x + p1.y, d2 = p2.x + p2.y, d3 = p3.x + p3.y;
if(d1 > 0)
{
if(d2 > 0 && d3 > 0) mask &= ~(1<<1);
}
else if(d1 < 0 && d2 < 0 && d3 < 0) mask &= ~(1<<0);
// +x,-y bottom split, no bias
d1 = p1.x - p1.y, d2 = p2.x - p2.y, d3 = p3.x - p3.y;
if(d1 > 0)
{
if(d2 > 0 && d3 > 0) mask &= ~(1<<3);
}
else if(d1 < 0 && d2 < 0 && d3 < 0) mask &= ~(1<<2);
// +x,-y,+z % +x,+y,-z = +y,+z top 1/bottom 1 split
d1 = p1.y + p1.z, d2 = p2.y + p2.z, d3 = p3.y + p3.z;
if(d1 > bias)
{
if(d2 > bias && d3 > bias) mask &= ~(1<<2);
}
else if(d1 < -bias && d2 < -bias && d3 < -bias) mask &= ~(1<<0);
// +x,+y,-z % -x,+y,+z = +x,+z top 1/bottom 2 split
d1 = p1.x + p1.z, d2 = p2.x + p2.z, d3 = p3.x + p3.z;
if(d1 > bias)
{
if(d2 > bias && d3 > bias) mask &= ~(1<<3);
}
else if(d1 < -bias && d2 < -bias && d3 < -bias) mask &= ~(1<<0);
// -x,-y,-z % +x,-y,+z = -x,+z top 2/bottom 1 split
d1 = p1.z - p1.x, d2 = p2.z - p2.x, d3 = p3.z - p3.x;
if(d1 > bias)
{
if(d2 > bias && d3 > bias) mask &= ~(1<<2);
}
else if(d1 < -bias && d2 < -bias && d3 < -bias) mask &= ~(1<<1);
// -x,+y,+z % -x,-y,-z = -y,+z top 2/bottom 2 split
d1 = p1.z - p1.y, d2 = p2.z - p2.y, d3 = p3.z - p3.y;
if(d1 > bias)
{
if(d2 > bias && d3 > bias) mask &= ~(1<<3);
}
else if(d1 < -bias && d2 < -bias && d3 < -bias) mask &= ~(1<<1);
return mask;
}
int cullfrustumsides(const vec &lightpos, float lightradius, float size, float border)
{
int sides = 0x3F, masks[6] = { 3<<4, 3<<4, 3<<0, 3<<0, 3<<2, 3<<2 };
float scale = (size - 2*border)/size, bias = border / (float)(size - border);
// check if cone enclosing side would cross frustum plane
scale = 2 / (scale*scale + 2);
loopi(5) if(vfcP[i].dist(lightpos) <= -0.03125f)
{
vec n = vec(vfcP[i]).div(lightradius);
float len = scale*n.squaredlen();
if(n.x*n.x > len) sides &= n.x < 0 ? ~(1<<0) : ~(2 << 0);
if(n.y*n.y > len) sides &= n.y < 0 ? ~(1<<2) : ~(2 << 2);
if(n.z*n.z > len) sides &= n.z < 0 ? ~(1<<4) : ~(2 << 4);
}
if (vfcP[4].dist(lightpos) >= vfcDfog + 0.03125f)
{
vec n = vec(vfcP[4]).div(lightradius);
float len = scale*n.squaredlen();
if(n.x*n.x > len) sides &= n.x >= 0 ? ~(1<<0) : ~(2 << 0);
if(n.y*n.y > len) sides &= n.y >= 0 ? ~(1<<2) : ~(2 << 2);
if(n.z*n.z > len) sides &= n.z >= 0 ? ~(1<<4) : ~(2 << 4);
}
// this next test usually clips off more sides than the former, but occasionally clips fewer/different ones, so do both and combine results
// check if frustum corners/origin cross plane sides
// infinite version, assumes frustum corners merely give direction and extend to infinite distance
vec p = vec(camera1->o).sub(lightpos).div(lightradius);
float dp = p.x + p.y, dn = p.x - p.y, ap = fabs(dp), an = fabs(dn);
masks[0] |= ap <= bias*an ? 0x3F : (dp >= 0 ? (1<<0)|(1<<2) : (2<<0)|(2<<2));
masks[1] |= an <= bias*ap ? 0x3F : (dn >= 0 ? (1<<0)|(2<<2) : (2<<0)|(1<<2));
dp = p.y + p.z, dn = p.y - p.z, ap = fabs(dp), an = fabs(dn);
masks[2] |= ap <= bias*an ? 0x3F : (dp >= 0 ? (1<<2)|(1<<4) : (2<<2)|(2<<4));
masks[3] |= an <= bias*ap ? 0x3F : (dn >= 0 ? (1<<2)|(2<<4) : (2<<2)|(1<<4));
dp = p.z + p.x, dn = p.z - p.x, ap = fabs(dp), an = fabs(dn);
masks[4] |= ap <= bias*an ? 0x3F : (dp >= 0 ? (1<<4)|(1<<0) : (2<<4)|(2<<0));
masks[5] |= an <= bias*ap ? 0x3F : (dn >= 0 ? (1<<4)|(2<<0) : (2<<4)|(1<<0));
loopi(4)
{
vec n;
switch(i)
{
case 0: n.cross(vfcP[0], vfcP[2]); break;
case 1: n.cross(vfcP[3], vfcP[0]); break;
case 2: n.cross(vfcP[2], vfcP[1]); break;
case 3: n.cross(vfcP[1], vfcP[3]); break;
}
dp = n.x + n.y, dn = n.x - n.y, ap = fabs(dp), an = fabs(dn);
if(ap > 0) masks[0] |= dp >= 0 ? (1<<0)|(1<<2) : (2<<0)|(2<<2);
if(an > 0) masks[1] |= dn >= 0 ? (1<<0)|(2<<2) : (2<<0)|(1<<2);
dp = n.y + n.z, dn = n.y - n.z, ap = fabs(dp), an = fabs(dn);
if(ap > 0) masks[2] |= dp >= 0 ? (1<<2)|(1<<4) : (2<<2)|(2<<4);
if(an > 0) masks[3] |= dn >= 0 ? (1<<2)|(2<<4) : (2<<2)|(1<<4);
dp = n.z + n.x, dn = n.z - n.x, ap = fabs(dp), an = fabs(dn);
if(ap > 0) masks[4] |= dp >= 0 ? (1<<4)|(1<<0) : (2<<4)|(2<<0);
if(an > 0) masks[5] |= dn >= 0 ? (1<<4)|(2<<0) : (2<<4)|(1<<0);
}
return sides & masks[0] & masks[1] & masks[2] & masks[3] & masks[4] & masks[5];
}
int cullfrustumtetra(const vec &lightpos, float lightradius, float size, float border)
{
int outside[5] = { 0, 0, 0, 0 };
loopi(4) if(vfcP[i].dist(lightpos) < 0) outside[4] |= 1<<i;
float dist = vfcP[4].dist(lightpos);
if(dist < 0) outside[4] |= 1<<4;
if(dist > vfcDfog) outside[4] |= 1<<5;
if(!outside[4]) return 0xF;
float pr = SQRT3*lightradius;
vec p[4] =
{
vec(lightpos).add(vec(-pr, pr, pr)),
vec(lightpos).add(vec(pr, -pr, pr)),
vec(lightpos).add(vec(pr, pr, -pr)),
vec(lightpos).add(vec(-pr, -pr, -pr))
};
loopk(4)
{
loopi(4) if(vfcP[i].dist(p[k]) < 0) outside[k] |= 1<<i;
float dist = vfcP[k].dist(p[k]);
if(dist < 0) outside[k] |= 1<<4;
if(dist > vfcDfog) outside[k] |= 1<<5;
}
int mask = 0xF;
if(outside[4] & outside[0] & outside[1] & outside[2]) mask &= ~(1<<0);
if(outside[4] & outside[0] & outside[1] & outside[3]) mask &= ~(1<<1);
if(outside[4] & outside[1] & outside[2] & outside[3]) mask &= ~(1<<2);
if(outside[4] & outside[0] & outside[2] & outside[3]) mask &= ~(1<<3);
return mask;
}
VAR(smbbcull, 0, 1, 1);
VAR(smdistcull, 0, 1, 1);
VAR(smnodraw, 0, 0, 1);
vec shadoworigin(0, 0, 0), shadowdir(0, 0, 0);
float shadowradius = 0, shadowbias = 0;
int shadowside = 0, shadowspot = 0;
vtxarray *shadowva = NULL;
static inline void addshadowva(vtxarray *va, float dist)
{
va->rdistance = int(dist);
int hash = clamp(int(dist*VASORTSIZE/shadowradius), 0, VASORTSIZE-1);
vtxarray **prev = &vasort[hash], *cur = vasort[hash];
while(cur && va->rdistance > cur->rdistance)
{
prev = &cur->rnext;
cur = cur->rnext;
}
va->rnext = *prev;
*prev = va;
}
void sortshadowvas()
{
shadowva = NULL;
vtxarray **last = &shadowva;
loopi(VASORTSIZE) if(vasort[i])
{
vtxarray *va = vasort[i];
*last = va;
while(va->rnext) va = va->rnext;
last = &va->rnext;
}
}