/*
* Method: Number
*
* Generates a real (non-integer) number.
*
* > number = rand:Number()
* > number = rand:Number(max)
* > number = rand:Number(min, max)
*
* Parameters:
*
* min - optional, the minimum possible value for the generated number. If
* omitted, defaults to 0
*
* max - optional, the maximum possible value for the generated number. If
* omitted, defaults to a very large number (currently 2^32-1)
*
* Return:
*
* number - the random number
*
* Availability:
*
* alpha 10
*
* Status:
*
* stable
*/
static int l_rand_number(lua_State *l)
{
MTRand *rand = LuaObject<MTRand>::CheckFromLua(1);
double min, max;
if (lua_isnumber(l, 2) && lua_isnumber(l, 3)) {
min = lua_tonumber(l, 2);
max = lua_tonumber(l, 3);
}
else if (lua_isnumber(l, 2)) {
min = 0.0;
max = lua_tonumber(l, 2);
}
else {
lua_pushnumber(l, rand->Double());
return 1;
}
if (min > max)
luaL_error(l, "Max must be bigger than min in random number range");
lua_pushnumber(l, rand->Double(min, max));
return 1;
}
void GenCol(float col[4], MTRand &rng) const {
float ma = 1 + float(rng.Double(modAll*2)-modAll);
for (int i=0; i<4; i++) col[i] = baseCol[i] + float(rng.Double(-modCol[i], modCol[i]));
for (int i=0; i<3; i++) col[i] = Clamp(ma*col[i], 0.0f, 1.0f);
}
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);
}
}