diff options
Diffstat (limited to 'src/mapgen_indev.cpp')
| -rw-r--r-- | src/mapgen_indev.cpp | 90 |
1 files changed, 46 insertions, 44 deletions
diff --git a/src/mapgen_indev.cpp b/src/mapgen_indev.cpp index 430359be2..bd922a4df 100644 --- a/src/mapgen_indev.cpp +++ b/src/mapgen_indev.cpp @@ -345,50 +345,52 @@ void MapgenIndev::generateFloatIslands(int min_y) { */ void MapgenIndev::generateFloatIslands(int min_y) { - if (node_min.Y < min_y) return; - PseudoRandom pr(blockseed + 985); - // 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. - - v3s16 p0(node_min.X, node_min.Y, node_min.Z); - MapNode n1(c_stone); - - float xl = node_max.X - node_min.X; - float yl = node_max.Y - node_min.Y; - float zl = node_max.Z - node_min.Z; - float midy = node_min.Y + yl * 0.5; - u32 index = 0, index2d = 0; - for (int x1 = 0; x1 <= xl; ++x1) - { - for (int z1 = 0; z1 <= zl; ++z1, ++index2d) - { - float noise3 = noiseindev_float_islands3->result[index2d]; - float pmidy = midy + noise3 / 1.5 * AMPY; - for (int y1 = 0; y1 <= yl; ++y1, ++index) - { - int y = y1 + node_min.Y; - float noise1 = noiseindev_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 = noiseindev_float_islands2->result[index]; - if (noise2 - noise1off > -0.7){ - v3s16 p = p0 + v3s16(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] = n1; - } - } - } - } - } + if (node_min.Y < min_y) return; + PseudoRandom pr(blockseed + 985); + // originally from http://forum.minetest.net/viewtopic.php?id=4776 + float RAR = 0.8 * farscale(0.4, node_min.Y); // 0.4; // Island rarity. + float AMPY = 24; // 24; // Amplitude of island centre y variation. + float TGRAD = 24; // 24; // Noise gradient to create top surface. + float BGRAD = 24; // 24; // Noise gradient to create bottom surface. + + v3s16 p0(node_min.X, node_min.Y, node_min.Z); + MapNode n1(c_stone); + + 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 + 1; + 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 = noiseindev_float_islands3->result[index2d]; + float pmidy = midy + noise3 / 1.5 * AMPY; + float noise1 = noiseindev_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 = noiseindev_float_islands2->result[index]; + if (noise2 - noise1off > -0.7){ + v3s16 p = p0 + v3s16(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] = n1; + } + } + } + } + } } void MapgenIndev::generateExperimental() { |