BOOL ValidNode(vertex& N)
{
// *** Query and cache polygons for ray-casting
Fvector PointUp; PointUp.set(N.Pos); PointUp.y += RCAST_Depth/2;
Fvector PointDown; PointDown.set(N.Pos); PointDown.y -= RCAST_Depth/2;
Fbox BB; BB.set (PointUp,PointUp); BB.grow(g_params.fPatchSize/2); // box 1
Fbox B2; B2.set (PointDown,PointDown); B2.grow(g_params.fPatchSize/2); // box 2
BB.merge(B2 );
BoxQuery(BB,false );
u32 dwCount = XRC.r_count();
if (dwCount==0) {
Log("chasm1");
return FALSE; // chasm?
}
// *** Transfer triangles and compute sector
R_ASSERT(dwCount<RCAST_MaxTris);
static svector<tri,RCAST_MaxTris> tris; tris.clear();
for (u32 i=0; i<dwCount; i++)
{
tri& D = tris.last();
CDB::RESULT&rp = XRC.r_begin()[i];
*(Level.get_tris()+XRC.r_begin()[i].id);
D.v[0].set (rp.verts[0]);
D.v[1].set (rp.verts[1]);
D.v[2].set (rp.verts[2]);
Fvector N;
N.mknormal (D.v[0],D.v[1],D.v[2]);
if (N.y<=0) continue;
tris.inc ();
}
if (tris.size()==0) {
Log("chasm2");
return FALSE; // chasm?
}
// *** Perform ray-casts and calculate sector
Fvector P,D,PLP; D.set(0,-1,0);
float coeff = 0.5f*g_params.fPatchSize/float(RCAST_Count);
int num_successed_rays = 0;
for (int x=-RCAST_Count; x<=RCAST_Count; x++)
{
P.x = N.Pos.x + coeff*float(x);
for (int z=-RCAST_Count; z<=RCAST_Count; z++) {
P.z = N.Pos.z + coeff*float(z);
P.y = N.Pos.y;
N.Plane.intersectRayPoint(P,D,PLP); // "project" position
P.y = PLP.y+RCAST_DepthValid/2;
float tri_min_range = flt_max;
int tri_selected = -1;
float range = 0.f,u,v;
for (i=0; i<u32(tris.size()); i++)
{
if (CDB::TestRayTri(P,D,tris[i].v,u,v,range,false))
{
if (range<tri_min_range) {
tri_min_range = range;
tri_selected = i;
}
}
}
if (tri_selected>=0) {
if (range<RCAST_DepthValid) num_successed_rays++;
}
}
}
if (float(num_successed_rays)/float(RCAST_Total) < 0.5f) {
Msg ("Floating node.");
return FALSE;
}
return TRUE;
}
BOOL CreateNode(Fvector& vAt, vertex& N)
{
// *** Query and cache polygons for ray-casting
Fvector PointUp; PointUp.set(vAt); PointUp.y += RCAST_Depth; SnapXZ (PointUp);
Fvector PointDown; PointDown.set(vAt); PointDown.y -= RCAST_Depth; SnapXZ (PointDown);
Fbox BB; BB.set (PointUp,PointUp); BB.grow(g_params.fPatchSize/2); // box 1
Fbox B2; B2.set (PointDown,PointDown); B2.grow(g_params.fPatchSize/2); // box 2
BB.merge(B2 );
BoxQuery(BB,false );
u32 dwCount = XRC.r_count();
if (dwCount==0) {
// Log("chasm1");
return FALSE; // chasm?
}
// *** Transfer triangles and compute sector
R_ASSERT(dwCount<RCAST_MaxTris);
static svector<tri,RCAST_MaxTris> tris; tris.clear();
for (u32 i=0; i<dwCount; i++)
{
tri& D = tris.last();
CDB::RESULT &rp = XRC.r_begin()[i];
CDB::TRI& T = *(Level.get_tris()+rp.id);
D.v[0].set (rp.verts[0]);
D.v[1].set (rp.verts[1]);
D.v[2].set (rp.verts[2]);
D.sector = T.sector;
D.N.mknormal(D.v[0],D.v[1],D.v[2]);
if (D.N.y<=0) continue;
tris.inc ();
}
if (tris.size()==0) {
// Log("chasm2");
return FALSE; // chasm?
}
// *** Perform ray-casts and calculate sector
WORD Sector = 0xfffe; // mark as first time
static svector<Fvector,RCAST_Total> points; points.clear();
static svector<Fvector,RCAST_Total> normals; normals.clear();
Fvector P,D; D.set(0,-1,0);
float coeff = 0.5f*g_params.fPatchSize/float(RCAST_Count);
for (int x=-RCAST_Count; x<=RCAST_Count; x++)
{
P.x = vAt.x + coeff*float(x);
for (int z=-RCAST_Count; z<=RCAST_Count; z++) {
P.z = vAt.z + coeff*float(z);
P.y = vAt.y + 10.f;
float tri_min_range = flt_max;
int tri_selected = -1;
float range,u,v;
for (i=0; i<u32(tris.size()); i++)
{
if (CDB::TestRayTri(P,D,tris[i].v,u,v,range,false))
{
if (range<tri_min_range) {
tri_min_range = range;
tri_selected = i;
}
}
}
if (tri_selected>=0) {
P.y -= tri_min_range;
points.push_back(P);
normals.push_back(tris[tri_selected].N);
WORD TS = WORD(tris[tri_selected].sector);
if (Sector==0xfffe) Sector = TS;
else if (Sector!=TS) Sector=InvalidSector;
}
}
}
if (points.size()<3) {
// Msg ("Failed to create node at [%f,%f,%f].",vAt.x,vAt.y,vAt.z);
return FALSE;
}
if (float(points.size())/float(RCAST_Total) < 0.7f) {
// Msg ("Partial chasm at [%f,%f,%f].",vAt.x,vAt.y,vAt.z);
return FALSE;
}
// *** Calc normal
Fvector vNorm;
vNorm.set(0,0,0);
for (u32 n=0; n<normals.size(); n++)
vNorm.add(normals[n]);
vNorm.div(float(normals.size()));
vNorm.normalize();
/*
{
// second algorithm (Magic)
Fvector N,O;
N.set(vNorm);
O.set(points[0]);
Mgc::OrthogonalPlaneFit(
points.size(),(Mgc::Vector3*)points.begin(),
*((Mgc::Vector3*)&O),
*((Mgc::Vector3*)&N)
);
if (N.y<0) N.invert();
N.normalize();
vNorm.lerp(vNorm,N,.3f);
vNorm.normalize();
}
*/
// *** Align plane
Fvector vOffs;
vOffs.set(0,-1000,0);
Fplane PL; PL.build(vOffs,vNorm);
for (u32 p=0; p<points.size(); p++)
{
float dist = PL.classify(points[p]);
if (dist>0) {
vOffs = points[p];
PL.build(vOffs,vNorm);
}
}
// *** Create node and register it
N.Sector =Sector; // sector
N.Plane.build (vOffs,vNorm); // build plane
D.set (0,1,0);
N.Plane.intersectRayPoint(PointDown,D,N.Pos); // "project" position
// *** Validate results
vNorm.set(0,1,0);
if (vNorm.dotproduct(N.Plane.n)<_cos(deg2rad(60.f))) return FALSE;
float y_old = vAt.y;
float y_new = N.Pos.y;
if (y_old>y_new) {
// down
if (y_old-y_new > g_params.fCanDOWN ) return FALSE;
} else {
// up
if (y_new-y_old > g_params.fCanUP ) return FALSE;
}
// *** Validate plane
{
Fvector PLP; D.set(0,-1,0);
int num_successed_rays = 0;
for (int x=-RCAST_Count; x<=RCAST_Count; x++)
{
P.x = N.Pos.x + coeff*float(x);
for (int z=-RCAST_Count; z<=RCAST_Count; z++) {
P.z = N.Pos.z + coeff*float(z);
P.y = N.Pos.y;
N.Plane.intersectRayPoint(P,D,PLP); // "project" position
P.y = PLP.y+RCAST_VALID*0.01f;
float tri_min_range = flt_max;
int tri_selected = -1;
float range,u,v;
for (i=0; i<float(tris.size()); i++)
{
if (CDB::TestRayTri(P,D,tris[i].v,u,v,range,false))
{
if (range<tri_min_range) {
tri_min_range = range;
tri_selected = i;
}
}
}
if (tri_selected>=0) {
if (tri_min_range<RCAST_VALID) num_successed_rays++;
}
}
}
float perc = float(num_successed_rays)/float(RCAST_Total);
if (perc < 0.5f) {
// Msg ("Floating node.");
return FALSE;
}
}
// *** Mask check
// ???
return TRUE;
}