From 70354ac20b456f2cad3208e13ccb0a30980df39c Mon Sep 17 00:00:00 2001 From: paramat Date: Sun, 18 Jan 2015 12:35:38 +0000 Subject: [PATCH] Mgv7: Speed optimise calculateNoise and generateRidgeTerrain Remove unnecessary range limiting of persistmap Skip calculation of filler, mountain, ridge, heat and humidity perlinmaps in underground mapchunks Skip generateRidgeTerrain in underground mapchunks --- src/mapgen_v7.cpp | 43 +++++++++++++++++++++++-------------------- 1 file changed, 23 insertions(+), 20 deletions(-) diff --git a/src/mapgen_v7.cpp b/src/mapgen_v7.cpp index 251540880..f13eee829 100644 --- a/src/mapgen_v7.cpp +++ b/src/mapgen_v7.cpp @@ -285,33 +285,33 @@ void MapgenV7::calculateNoise() int y = node_min.Y; int z = node_min.Z; - noise_height_select->perlinMap2D(x, z); noise_terrain_persist->perlinMap2D(x, z); float *persistmap = noise_terrain_persist->result; - for (int i = 0; i != csize.X * csize.Z; i++) - persistmap[i] = rangelim(persistmap[i], 0.4, 0.9); noise_terrain_base->perlinMap2D(x, z, persistmap); noise_terrain_alt->perlinMap2D(x, z, persistmap); - noise_filler_depth->perlinMap2D(x, z); - - if (spflags & MGV7_MOUNTAINS) { - noise_mountain->perlinMap3D(x, y, z); - noise_mount_height->perlinMap2D(x, z); - } - - if (spflags & MGV7_RIDGES) { - noise_ridge->perlinMap3D(x, y, z); - noise_ridge_uwater->perlinMap2D(x, z); - } + noise_height_select->perlinMap2D(x, z); if (flags & MG_CAVES) { noise_cave1->perlinMap3D(x, y, z); noise_cave2->perlinMap3D(x, y, z); } - noise_heat->perlinMap2D(x, z); - noise_humidity->perlinMap2D(x, z); + if (node_max.Y >= water_level) { + noise_filler_depth->perlinMap2D(x, z); + noise_heat->perlinMap2D(x, z); + noise_humidity->perlinMap2D(x, z); + + if (spflags & MGV7_MOUNTAINS) { + noise_mountain->perlinMap3D(x, y, z); + noise_mount_height->perlinMap2D(x, z); + } + + if (spflags & MGV7_RIDGES) { + noise_ridge->perlinMap3D(x, y, z); + noise_ridge_uwater->perlinMap2D(x, z); + } + } //printf("calculateNoise: %dus\n", t.stop()); } @@ -469,7 +469,7 @@ int MapgenV7::generateBaseTerrain() int MapgenV7::generateMountainTerrain(int ymax) { - if (node_max.Y <= water_level) + if (node_max.Y < water_level) return ymax; MapNode n_stone(c_stone); @@ -500,6 +500,9 @@ int MapgenV7::generateMountainTerrain(int ymax) void MapgenV7::generateRidgeTerrain() { + if (node_max.Y < water_level) + return; + MapNode n_water(c_water_source); MapNode n_air(CONTENT_AIR); u32 index = 0; @@ -637,12 +640,12 @@ void MapgenV7::generateBiomes() void MapgenV7::dustTopNodes() { + if (node_max.Y < water_level) + return; + v3s16 em = vm->m_area.getExtent(); u32 index = 0; - if (water_level > node_max.Y) - return; - for (s16 z = node_min.Z; z <= node_max.Z; z++) for (s16 x = node_min.X; x <= node_max.X; x++, index++) { Biome *biome = (Biome *)bmgr->get(biomemap[index]); -- 2.25.1