Handle particle spawners in env and delete expired ids

[dragonfireclient.git] / src / mg_decoration.cpp

diff --git a/src/mg_decoration.cpp b/src/mg_decoration.cpp
index 4f543a7ddff120e1d24245cc4bc2db3070bd2c34..8b6abb5d5598da883ef654478ed89884bf6d97d6 100644 (file)
--- a/src/mg_decoration.cpp
+++ b/src/mg_decoration.cpp
@@ -30,6 +30,7 @@ FlagDesc flagdesc_deco[] = {
        {"place_center_y", DECO_PLACE_CENTER_Y},
        {"place_center_z", DECO_PLACE_CENTER_Z},
        {"force_placement", DECO_FORCE_PLACEMENT},
+       {"liquid_surface", DECO_LIQUID_SURFACE},
        {NULL,             0}
 };
 
@@ -86,7 +87,7 @@ void Decoration::resolveNodeNames()
 
 size_t Decoration::placeDeco(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax)
 {
-       PseudoRandom ps(blockseed + 53);
+       PcgRandom ps(blockseed + 53);
        int carea_size = nmax.X - nmin.X + 1;
 
        // Divide area into parts
@@ -116,7 +117,15 @@ size_t Decoration::placeDeco(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax)
                float nval = (flags & DECO_USE_NOISE) ?
                        NoisePerlin2D(&np, p2d_center.X, p2d_center.Y, mapseed) :
                        fill_ratio;
-               u32 deco_count = area * MYMAX(nval, 0.f);
+               u32 deco_count = 0;
+               float deco_count_f = (float)area * nval;
+               if (deco_count_f >= 1.f) {
+                       deco_count = deco_count_f;
+               } else if (deco_count_f > 0.f) {
+                       // For low density decorations calculate a chance for 1 decoration
+                       if (ps.range(1000) <= deco_count_f * 1000.f)
+                               deco_count = 1;
+               }
 
                for (u32 i = 0; i < deco_count; i++) {
                        s16 x = ps.range(p2d_min.X, p2d_max.X);
@@ -124,9 +133,13 @@ size_t Decoration::placeDeco(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax)
 
                        int mapindex = carea_size * (z - nmin.Z) + (x - nmin.X);
 
-                       s16 y = mg->heightmap ?
-                                       mg->heightmap[mapindex] :
-                                       mg->findGroundLevel(v2s16(x, z), nmin.Y, nmax.Y);
+                       s16 y = -MAX_MAP_GENERATION_LIMIT;
+                       if (flags & DECO_LIQUID_SURFACE)
+                               y = mg->findLiquidSurface(v2s16(x, z), nmin.Y, nmax.Y);
+                       else if (mg->heightmap)
+                               y = mg->heightmap[mapindex];
+                       else
+                               y = mg->findGroundLevel(v2s16(x, z), nmin.Y, nmax.Y);
 
                        if (y < nmin.Y || y > nmax.Y ||
                                y < y_min  || y > y_max)
@@ -165,7 +178,7 @@ size_t Decoration::placeDeco(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax)
 #if 0
 void Decoration::placeCutoffs(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax)
 {
-       PseudoRandom pr(blockseed + 53);
+       PcgRandom pr(blockseed + 53);
        std::vector<CutoffData> handled_cutoffs;
 
        // Copy over the cutoffs we're interested in so we don't needlessly hold a lock
@@ -281,7 +294,7 @@ bool DecoSimple::canPlaceDecoration(MMVManip *vm, v3s16 p)
 }
 
 
-size_t DecoSimple::generate(MMVManip *vm, PseudoRandom *pr, v3s16 p)
+size_t DecoSimple::generate(MMVManip *vm, PcgRandom *pr, v3s16 p)
 {
        if (!canPlaceDecoration(vm, p))
                return 0;
@@ -291,13 +304,16 @@ size_t DecoSimple::generate(MMVManip *vm, PseudoRandom *pr, v3s16 p)
        s16 height = (deco_height_max > 0) ?
                pr->range(deco_height, deco_height_max) : deco_height;
 
+       bool force_placement = (flags & DECO_FORCE_PLACEMENT);
+
        v3s16 em = vm->m_area.getExtent();
        u32 vi = vm->m_area.index(p);
        for (int i = 0; i < height; i++) {
                vm->m_area.add_y(em, vi, 1);
 
                content_t c = vm->m_data[vi].getContent();
-               if (c != CONTENT_AIR && c != CONTENT_IGNORE)
+               if (c != CONTENT_AIR && c != CONTENT_IGNORE &&
+                               !force_placement)
                        break;
 
                vm->m_data[vi] = MapNode(c_place);
@@ -322,7 +338,7 @@ DecoSchematic::DecoSchematic()
 }
 
 
-size_t DecoSchematic::generate(MMVManip *vm, PseudoRandom *pr, v3s16 p)
+size_t DecoSchematic::generate(MMVManip *vm, PcgRandom *pr, v3s16 p)
 {
        // Schematic could have been unloaded but not the decoration
        // In this case generate() does nothing (but doesn't *fail*)
@@ -346,7 +362,7 @@ size_t DecoSchematic::generate(MMVManip *vm, PseudoRandom *pr, v3s16 p)
 
        bool force_placement = (flags & DECO_FORCE_PLACEMENT);
 
-       schematic->blitToVManip(p, vm, rot, force_placement);
+       schematic->blitToVManip(vm, p, rot, force_placement);
 
        return 1;
 }