void ModelBody::RebuildCollisionMesh()
{
if (m_geom) {
if (GetFrame()) RemoveGeomsFromFrame(GetFrame());
DeleteGeoms();
}
m_collMesh = m_model->GetCollisionMesh();
SetPhysRadius(m_collMesh->GetAabb().GetRadius());
//static geom
m_geom = new Geom(m_collMesh->GetGeomTree());
m_geom->SetUserData(static_cast<void*>(this));
m_geom->MoveTo(GetOrient(), GetPosition());
//have to figure out which collision geometries are responsible for which geomtrees
DynGeomFinder dgf;
m_model->GetRoot()->Accept(dgf);
//dynamic geoms
for (auto it = m_collMesh->GetDynGeomTrees().begin(); it != m_collMesh->GetDynGeomTrees().end(); ++it) {
Geom *dynG = new Geom(*it);
dynG->SetUserData(static_cast<void*>(this));
dynG->MoveTo(GetOrient(), GetPosition());
dynG->m_animTransform = matrix4x4d::Identity();
SceneGraph::CollisionGeometry *cg = dgf.GetCgForTree(*it);
if (cg)
cg->SetGeom(dynG);
m_dynGeoms.push_back(dynG);
}
if (GetFrame()) AddGeomsToFrame(GetFrame());
}
void CityOnPlanet::PutCityBit(MTRand &rand, const matrix4x4d &rot, vector3d p1, vector3d p2, vector3d p3, vector3d p4)
{
double rad = (p1-p2).Length()*0.5;
LmrModel *model(0);
double modelRadXZ(0);
const LmrCollMesh *cmesh(0);
vector3d cent = (p1+p2+p3+p4)*0.25;
cityflavourdef_t *flavour(0);
citybuildinglist_t *buildings(0);
// pick a building flavour (city, windfarm, etc)
for (int flv=0; flv<CITYFLAVOURS; flv++) {
flavour = &cityflavour[flv];
buildings = &s_buildingLists[flavour->buildingListIdx];
int tries;
for (tries=20; tries--; ) {
const citybuilding_t &bt = buildings->buildings[rand.Int32(buildings->numBuildings)];
model = bt.resolvedModel;
modelRadXZ = bt.xzradius;
cmesh = bt.collMesh;
if (modelRadXZ < rad) break;
if (tries == 0) return;
}
bool tooDistant = ((flavour->center - cent).Length()*(1.0/flavour->size) > rand.Double());
if (!tooDistant) break;
else flavour = 0;
}
if (flavour == 0) {
if (rad > MIN_SEG_SIZE) goto always_divide;
else return;
}
if (rad > modelRadXZ*2.0) {
always_divide:
vector3d a = (p1+p2)*0.5;
vector3d b = (p2+p3)*0.5;
vector3d c = (p3+p4)*0.5;
vector3d d = (p4+p1)*0.5;
vector3d e = (p1+p2+p3+p4)*0.25;
PutCityBit(rand, rot, p1, a, e, d);
PutCityBit(rand, rot, a, p2, b, e);
PutCityBit(rand, rot, e, b, p3, c);
PutCityBit(rand, rot, d, e, c, p4);
} else {
cent = cent.Normalized();
double height = m_planet->GetTerrainHeight(cent);
/* don't position below sealevel! */
if (height - m_planet->GetSBody()->GetRadius() <= 0.0) return;
cent = cent * height;
assert(cmesh);
Geom *geom = new Geom(cmesh->geomTree);
int rotTimes90 = rand.Int32(4);
matrix4x4d grot = rot * matrix4x4d::RotateYMatrix(M_PI*0.5*double(rotTimes90));
geom->MoveTo(grot, cent);
geom->SetUserData(this);
// f->AddStaticGeom(geom);
BuildingDef def = { model, cmesh->GetBoundingRadius(), rotTimes90, cent, geom, false };
m_buildings.push_back(def);
}
}
