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Ore: Add Blob ore type

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This commit is contained in:
kwolekr 2014-12-28 03:11:00 -05:00
parent 8c98f497d9
commit 900fa26965
4 changed files with 84 additions and 19 deletions
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61
src/mg_ore.cpp
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@ -178,12 +178,12 @@ void OreSheet::generate(ManualMapVoxelManipulator *vm, int seed,
if (!noise) {
int sx = nmax.X - nmin.X + 1;
int sz = nmax.Z - nmin.Z + 1;
noise = new Noise(&np, seed, sx, sz);
noise = new Noise(&np, 0, sx, sz);
}
noise->seed = seed + y_start;
noise->perlinMap2D(nmin.X, nmin.Z);
int index = 0;
size_t index = 0;
for (int z = nmin.Z; z <= nmax.Z; z++)
for (int x = nmin.X; x <= nmax.X; x++) {
float noiseval = noise->result[index++];
@ -204,3 +204,60 @@ void OreSheet::generate(ManualMapVoxelManipulator *vm, int seed,
}
}
}
///////////////////////////////////////////////////////////////////////////////
void OreBlob::generate(ManualMapVoxelManipulator *vm, int seed, u32 blockseed,
v3s16 nmin, v3s16 nmax)
{
PseudoRandom pr(blockseed + 2404);
MapNode n_ore(c_ore, 0, ore_param2);
int volume = (nmax.X - nmin.X + 1) *
(nmax.Y - nmin.Y + 1) *
(nmax.Z - nmin.Z + 1);
int csize = clust_size;
int nblobs = volume / clust_scarcity;
if (!noise)
noise = new Noise(&np, seed, csize, csize, csize);
for (int i = 0; i != nblobs; i++) {
int x0 = pr.range(nmin.X, nmax.X - csize + 1);
int y0 = pr.range(nmin.Y, nmax.Y - csize + 1);
int z0 = pr.range(nmin.Z, nmax.Z - csize + 1);
bool noise_generated = false;
noise->seed = blockseed + i;
size_t index = 0;
for (int z1 = 0; z1 != csize; z1++)
for (int y1 = 0; y1 != csize; y1++)
for (int x1 = 0; x1 != csize; x1++, index++) {
u32 i = vm->m_area.index(x0 + x1, y0 + y1, z0 + z1);
if (!CONTAINS(c_wherein, vm->m_data[i].getContent()))
continue;
// Lazily generate noise only if there's a chance of ore being placed
// This simple optimization makes calls 6x faster on average
if (!noise_generated) {
noise_generated = true;
noise->perlinMap3D(x0, y0, z0);
}
float noiseval = noise->result[index];
float xdist = x1 - csize / 2;
float ydist = y1 - csize / 2;
float zdist = z1 - csize / 2;
noiseval -= (sqrt(xdist * xdist + ydist * ydist + zdist * zdist) / csize);
if (noiseval < nthresh)
continue;
vm->m_data[i] = n_ore;
}
}
}