float *NoiseIndev::perlinMap2DFar(float x, float y) {
float f = 1.0, g = 1.0;
int i, j, index, oct;
x /= np->spread.X;
y /= np->spread.Y;
memset(result, 0, sizeof(float) * sx * sy);
for (oct = 0; oct < np->octaves; oct++) {
gradientMap2D(x * f, y * f,
f / np->spread.X, f / np->spread.Y,
seed + np->seed + oct);
index = 0;
for (j = 0; j != sy; j++) {
for (i = 0; i != sx; i++) {
result[index] += g * buf[index];
index++;
}
}
f *= 2.0;
g *= np->persist * farscale(npindev->farpersist, x, y); // only difference from not far version
}
return result;
}
void NoiseIndev::transformNoiseMapFarScale(float xx, float yy, float zz) {
int i = 0;
for (int z = 0; z != sz; z++) {
for (int y = 0; y != sy; y++) {
for (int x = 0; x != sx; x++) {
result[i] = result[i] * npindev->scale * farscale(npindev->farscale, xx, yy, zz) + npindev->offset;
i++;
}
}
}
}
int Mapgen_features::float_islands_generate(const v3POS & node_min, const v3POS & node_max, int min_y, MMVManip *vm) {
int generated = 0;
if (node_min.Y < min_y) return generated;
// originally from http://forum.minetest.net/viewtopic.php?id=4776
float RAR = 0.8 * farscale(0.4, node_min.Y); // 0.4; // Island rarity in chunk layer. -0.4 = thick layer with holes, 0 = 50%, 0.4 = desert rarity, 0.7 = very rare.
float AMPY = 24; // 24; // Amplitude of island centre y variation.
float TGRAD = 24; // 24; // Noise gradient to create top surface. Tallness of island top.
float BGRAD = 24; // 24; // Noise gradient to create bottom surface. Tallness of island bottom.
v3POS p0(node_min.X, node_min.Y, node_min.Z);
float xl = node_max.X - node_min.X;
float yl = node_max.Y - node_min.Y;
float zl = node_max.Z - node_min.Z;
u32 zstride = xl + y_offset;
float midy = node_min.Y + yl * 0.5;
u32 index = 0;
for (int z1 = 0; z1 <= zl; ++z1)
for (int y1 = 0; y1 <= yl; ++y1)
for (int x1 = 0; x1 <= xl; ++x1, ++index) {
int y = y1 + node_min.Y;
u32 index2d = z1 * zstride + x1;
float noise3 = noise_float_islands3->result[index2d];
float pmidy = midy + noise3 / 1.5 * AMPY;
float noise1 = noise_float_islands1->result[index];
float offset = y > pmidy ? (y - pmidy) / TGRAD : (pmidy - y) / BGRAD;
float noise1off = noise1 - offset - RAR;
if (noise1off > 0 && noise1off < 0.7) {
float noise2 = noise_float_islands2->result[index];
if (noise2 - noise1off > -0.7) {
v3POS p = p0 + v3POS(x1, y1, z1);
u32 i = vm->m_area.index(p);
if (!vm->m_area.contains(i))
continue;
// Cancel if not air
if (vm->m_data[i].getContent() != CONTENT_AIR)
continue;
vm->m_data[i] = layers_get(index);
++generated;
}
}
}
return generated;
}
CaveIndev::CaveIndev(MapgenIndev *mg, PseudoRandom *ps, PseudoRandom *ps2,
v3s16 node_min, bool is_large_cave) {
this->mg = mg;
this->vm = mg->vm;
this->ndef = mg->ndef;
this->water_level = mg->water_level;
this->large_cave = is_large_cave;
this->ps = ps;
this->ps2 = ps2;
this->c_water_source = mg->c_water_source;
this->c_lava_source = mg->c_lava_source;
this->c_ice = mg->c_ice;
min_tunnel_diameter = 2;
max_tunnel_diameter = ps->range(2,6);
dswitchint = ps->range(1,14);
flooded = large_cave && ps->range(0,4);
if (large_cave) {
part_max_length_rs = ps->range(2,4);
float scale = farscale(0.4, node_min.X, node_min.Y, node_min.Z);
if (node_min.Y < -100 && !ps->range(0, scale * 14)) { //huge
flooded = !ps->range(0, 10);
tunnel_routepoints = ps->range(10, 50);
min_tunnel_diameter = 30;
max_tunnel_diameter = ps->range(40, ps->range(50, 80));
} else {
tunnel_routepoints = ps->range(5, ps->range(15,30));
min_tunnel_diameter = 5;
max_tunnel_diameter = ps->range(7, ps->range(8,24));
}
flooded_water = !ps->range(0, 2);
} else {
part_max_length_rs = ps->range(2,9);
tunnel_routepoints = ps->range(10, ps->range(15,30));
}
large_cave_is_flat = (ps->range(0,1) == 0);
}
void DungeonGen::makeDungeon(v3s16 start_padding)
{
v3s16 areasize = vm->m_area.getExtent();
v3s16 roomsize;
v3s16 roomplace;
float far_multi = farscale(5, vm->m_area.MinEdge.X, vm->m_area.MinEdge.Y, vm->m_area.MinEdge.Z);
/*
Find place for first room
*/
bool fits = false;
for (u32 i = 0; i < 100 && !fits; i++) {
bool is_large_room = ((random.next() & 3) == 1);
roomsize = is_large_room ?
v3s16(random.range(8, 16 * far_multi), random.range(8, 16 * far_multi), random.range(8, 16 * far_multi)) :
v3s16(random.range(4, 8 * far_multi), random.range(4, 6 * far_multi), random.range(4, 8 * far_multi));
roomsize += dp.roomsize;
// start_padding is used to disallow starting the generation of
// a dungeon in a neighboring generation chunk
roomplace = vm->m_area.MinEdge + start_padding + v3s16(
random.range(0, areasize.X - roomsize.X - start_padding.X),
random.range(0, areasize.Y - roomsize.Y - start_padding.Y),
random.range(0, areasize.Z - roomsize.Z - start_padding.Z));
/*
Check that we're not putting the room to an unknown place,
otherwise it might end up floating in the air
*/
fits = true;
for (s16 z = 0; z < roomsize.Z; z++)
for (s16 y = 0; y < roomsize.Y; y++)
for (s16 x = 0; x < roomsize.X; x++) {
v3s16 p = roomplace + v3s16(x, y, z);
u32 vi = vm->m_area.index(p);
if ((vm->m_flags[vi] & VMANIP_FLAG_DUNGEON_UNTOUCHABLE) ||
vm->m_data[vi].getContent() == CONTENT_IGNORE) {
fits = false;
break;
}
}
}
// No place found
if (fits == false)
return;
/*
Stores the center position of the last room made, so that
a new corridor can be started from the last room instead of
the new room, if chosen so.
*/
v3s16 last_room_center = roomplace + v3s16(roomsize.X / 2, 1, roomsize.Z / 2);
u32 room_count = random.range(2, random.range(8, 16 * far_multi));
for (u32 i = 0; i < room_count; i++) {
// Make a room to the determined place
makeRoom(roomsize, roomplace);
v3s16 room_center = roomplace + v3s16(roomsize.X / 2, 1, roomsize.Z / 2);
mg->gennotify.addEvent(dp.notifytype, room_center);
#ifdef DGEN_USE_TORCHES
// Place torch at room center (for testing)
vm->m_data[vm->m_area.index(room_center)] = MapNode(c_torch);
#endif
// Quit if last room
if (i == room_count - 1)
break;
// Determine walker start position
bool start_in_last_room = (random.range(0, 2) != 0);
v3s16 walker_start_place;
if (start_in_last_room) {
walker_start_place = last_room_center;
} else {
walker_start_place = room_center;
// Store center of current room as the last one
last_room_center = room_center;
}
// Create walker and find a place for a door
v3s16 doorplace;
v3s16 doordir;
m_pos = walker_start_place;
if (!findPlaceForDoor(doorplace, doordir))
return;
if (random.range(0, 1) == 0)
// Make the door
makeDoor(doorplace, doordir);
else
// Don't actually make a door
doorplace -= doordir;
// Make a random corridor starting from the door
v3s16 corridor_end;
v3s16 corridor_end_dir;
makeCorridor(doorplace, doordir, corridor_end, corridor_end_dir);
// Find a place for a random sized room
roomsize = v3s16(random.range(4, 8 * far_multi), random.range(4, 6 * far_multi), random.range(4, 8 * far_multi));
roomsize += dp.roomsize;
m_pos = corridor_end;
m_dir = corridor_end_dir;
if (!findPlaceForRoomDoor(roomsize, doorplace, doordir, roomplace))
return;
if (random.range(0, 1) == 0)
// Make the door
makeDoor(doorplace, doordir);
else
// Don't actually make a door
roomplace -= doordir;
}
}
void MapgenIndev::calculateNoise() {
int x = node_min.X;
int y = node_min.Y;
int z = node_min.Z;
// Need to adjust for the original implementation's +.5 offset...
if (!(flags & MG_FLAT)) {
noiseindev_terrain_base->perlinMap2DFar(
x + 0.5 * noiseindev_terrain_base->npindev->spread.X * farscale(noiseindev_terrain_base->npindev->farspread, x, z),
z + 0.5 * noiseindev_terrain_base->npindev->spread.Z * farscale(noiseindev_terrain_base->npindev->farspread, x, z));
noiseindev_terrain_base->transformNoiseMapFarScale(x, y, z);
noiseindev_terrain_higher->perlinMap2DFar(
x + 0.5 * noiseindev_terrain_higher->npindev->spread.X * farscale(noiseindev_terrain_higher->npindev->farspread, x, z),
z + 0.5 * noiseindev_terrain_higher->npindev->spread.Z * farscale(noiseindev_terrain_higher->npindev->farspread, x, z));
noiseindev_terrain_higher->transformNoiseMapFarScale(x, y, z);
noiseindev_steepness->perlinMap2DFar(
x + 0.5 * noiseindev_steepness->npindev->spread.X * farscale(noiseindev_steepness->npindev->farspread, x, z),
z + 0.5 * noiseindev_steepness->npindev->spread.Z * farscale(noiseindev_steepness->npindev->farspread, x, z));
noiseindev_steepness->transformNoiseMapFarScale(x, y, z);
noiseindev_height_select->perlinMap2DFar(
x + 0.5 * noiseindev_height_select->npindev->spread.X * farscale(noiseindev_height_select->npindev->farspread, x, z),
z + 0.5 * noiseindev_height_select->npindev->spread.Z * farscale(noiseindev_height_select->npindev->farspread, x, z));
noiseindev_float_islands1->perlinMap3D(
x + 0.33 * noiseindev_float_islands1->npindev->spread.X * farscale(noiseindev_float_islands1->npindev->farspread, x, y, z),
y + 0.33 * noiseindev_float_islands1->npindev->spread.Y * farscale(noiseindev_float_islands1->npindev->farspread, x, y, z),
z + 0.33 * noiseindev_float_islands1->npindev->spread.Z * farscale(noiseindev_float_islands1->npindev->farspread, x, y, z)
);
noiseindev_float_islands1->transformNoiseMapFarScale(x, y, z);
noiseindev_float_islands2->perlinMap3D(
x + 0.33 * noiseindev_float_islands2->npindev->spread.X * farscale(noiseindev_float_islands2->npindev->farspread, x, y, z),
y + 0.33 * noiseindev_float_islands2->npindev->spread.Y * farscale(noiseindev_float_islands2->npindev->farspread, x, y, z),
z + 0.33 * noiseindev_float_islands2->npindev->spread.Z * farscale(noiseindev_float_islands2->npindev->farspread, x, y, z)
);
noiseindev_float_islands2->transformNoiseMapFarScale(x, y, z);
noiseindev_float_islands3->perlinMap2DFar(
x + 0.5 * noiseindev_float_islands3->npindev->spread.X * farscale(noiseindev_float_islands3->npindev->farspread, x, z),
z + 0.5 * noiseindev_float_islands3->npindev->spread.Z * farscale(noiseindev_float_islands3->npindev->farspread, x, z));
noiseindev_float_islands3->transformNoiseMapFarScale(x, y, z);
noiseindev_mud->perlinMap2DFar(
x + 0.5 * noiseindev_mud->npindev->spread.X * farscale(noiseindev_mud->npindev->farspread, x, y, z),
z + 0.5 * noiseindev_mud->npindev->spread.Z * farscale(noiseindev_mud->npindev->farspread, x, y, z));
noiseindev_mud->transformNoiseMapFarScale(x, y, z);
}
noiseindev_beach->perlinMap2DFar(
x + 0.2 * noiseindev_beach->npindev->spread.X * farscale(noiseindev_beach->npindev->farspread, x, z),
z + 0.7 * noiseindev_beach->npindev->spread.Z * farscale(noiseindev_beach->npindev->farspread, x, z));
noiseindev_biome->perlinMap2DFar(
x + 0.6 * noiseindev_biome->npindev->spread.X * farscale(noiseindev_biome->npindev->farspread, x, z),
z + 0.2 * noiseindev_biome->npindev->spread.Z * farscale(noiseindev_biome->npindev->farspread, x, z));
}
