+OrePuff::OrePuff() :
+ Ore()
+{
+ noise_puff_top = NULL;
+ noise_puff_bottom = NULL;
+}
+
+
+OrePuff::~OrePuff()
+{
+ delete noise_puff_top;
+ delete noise_puff_bottom;
+}
+
+
+void OrePuff::generate(MMVManip *vm, int mapseed, u32 blockseed,
+ v3s16 nmin, v3s16 nmax, u8 *biomemap)
+{
+ PcgRandom pr(blockseed + 4234);
+ MapNode n_ore(c_ore, 0, ore_param2);
+
+ int y_start = pr.range(nmin.Y, nmax.Y);
+
+ if (!noise) {
+ int sx = nmax.X - nmin.X + 1;
+ int sz = nmax.Z - nmin.Z + 1;
+ noise = new Noise(&np, 0, sx, sz);
+ noise_puff_top = new Noise(&np_puff_top, 0, sx, sz);
+ noise_puff_bottom = new Noise(&np_puff_bottom, 0, sx, sz);
+ }
+
+ noise->seed = mapseed + y_start;
+ noise->perlinMap2D(nmin.X, nmin.Z);
+ bool noise_generated = false;
+
+ size_t index = 0;
+ for (int z = nmin.Z; z <= nmax.Z; z++)
+ for (int x = nmin.X; x <= nmax.X; x++, index++) {
+ float noiseval = noise->result[index];
+ if (noiseval < nthresh)
+ continue;
+
+ if (biomemap && !biomes.empty()) {
+ UNORDERED_SET<u8>::iterator it = biomes.find(biomemap[index]);
+ if (it == biomes.end())
+ continue;
+ }
+
+ if (!noise_generated) {
+ noise_generated = true;
+ noise_puff_top->perlinMap2D(nmin.X, nmin.Z);
+ noise_puff_bottom->perlinMap2D(nmin.X, nmin.Z);
+ }
+
+ float ntop = noise_puff_top->result[index];
+ float nbottom = noise_puff_bottom->result[index];
+
+ if (!(flags & OREFLAG_PUFF_CLIFFS)) {
+ float ndiff = noiseval - nthresh;
+ if (ndiff < 1.0f) {
+ ntop *= ndiff;
+ nbottom *= ndiff;
+ }
+ }
+
+ int ymid = y_start;
+ int y0 = ymid - nbottom;
+ int y1 = ymid + ntop;
+
+ if ((flags & OREFLAG_PUFF_ADDITIVE) && (y0 > y1))
+ SWAP(int, y0, y1);
+
+ for (int y = y0; y <= y1; y++) {
+ u32 i = vm->m_area.index(x, y, z);
+ if (!vm->m_area.contains(i))
+ continue;
+ if (!CONTAINS(c_wherein, vm->m_data[i].getContent()))
+ continue;
+
+ vm->m_data[i] = n_ore;
+ }
+ }
+}
+
+
+///////////////////////////////////////////////////////////////////////////////
+
+