From 7efe89ff584b2c0338dcede4c1e08504d0158780 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20R=C3=BChl?= <bahamada_basti@yahoo.de>
Date: Sun, 26 Jun 2011 13:47:21 +0200
Subject: [PATCH] backported cactus, papyrus and clay

---
 data/heart.png | Bin 308 -> 258 bytes
 heart.png      | Bin 258 -> 0 bytes
 src/mapgen.cpp |  77 ++++++++++++++++++++++++++++++++++++++++++-------
 3 files changed, 67 insertions(+), 10 deletions(-)
 delete mode 100644 heart.png

diff --git a/data/heart.png b/data/heart.png
index 6bc183e04f21cba17b52009e89bb52072d5a0afd..bea1aefd6b22e3268f88db0eb26188b1cb362f81 100644
GIT binary patch
delta 210
zcmV;@04@Kt0)hgNBnkm@Qb$4nuFf3kkuey52XskIMF-mj8W%GHKxNM^0001#Nkl<Z
zILoDz(G9~O3`C!!ZbaAU9ITNwm?LYnGtrOW#!v^EauNb@z6S^pfE8bB(|exiVB5Q_
z1qs9kqVWKE6o`alGN(H5fkelncnYWrnnF6B+~_DV)^fJ`NF|dOCN&KZfbhpL^p>VQ
zc5uf$mMgo6z)RnOHGYBE@E2eNX~Qny4B~~m3Xq?rh593L2{H=50gdG<qjW()Qvd(}
M07*qoM6N<$f))N%_W%F@

delta 260
zcmV+f0sH=f0<;2<Bn<>}LP=Bz2nYy#2xN$nE*O8-Nkl<ZIE~HHJx&8L5QgE$2nouh
zqU8o~6m9?=Daj4E0VQ+^C&*Hz<p{X}R7j}^Rj3#WyumEqq=Z)*dF;{mdHlm)lgh~r
zG06D}<6OTcj&O)a+!wn2QhbKvJb(Tg0#0#)VXnUsO=oixB04c4UOH>9#BDbI(Ls&#
z%GzuoAEjllO;+D+Z%Dd*{$^t^CUp&JEU@e=UJ*}~yJ%xg%!>0@nGqj71`Tns%ixlj
zSHyE-v`gGF%B`+*G+V^gXS^f57lH>&dmg0sA52LHMA{<$AAAB8R%;g2&!{W_0000<
KMNUMnLSTZvP;Kl0

diff --git a/heart.png b/heart.png
deleted file mode 100644
index bea1aefd6b22e3268f88db0eb26188b1cb362f81..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001

literal 258
zcmeAS@N?(olHy`uVBq!ia0vp^0wB!61|;P_|4#%`jKx9jP7LeL$-D$|I14-?iy0XB
zj({-ZRBb+KpdfpRr>`sfZB{99V<v~x^Ljv`DV{ElAr_~XPQJ){Sb@i7{^C5B>n~*1
zOf;RLoV~^PV*i6<0qnDigqRBVv2zGCh{k7MuAcWI;r8w|tei*K7JX!>6zOP5Hd=1=
zq0!~|;tH-6T(g|4=G}RrVR)@*+b<8*$>M6JyaEj$jvIcNwydn+xXm=}-5m$K?>Cy(
zHQx9jp1_iMSnmPPqt@MA6Xq{%{iR&UX~eakvG=Lg;u1%PV4(XLJYD@<);T3K0RY|`
BTmb+8

diff --git a/src/mapgen.cpp b/src/mapgen.cpp
index 801dd72b..71696a34 100644
--- a/src/mapgen.cpp
+++ b/src/mapgen.cpp
@@ -151,6 +151,34 @@ static void make_tree(VoxelManipulator &vmanip, v3s16 p0)
 	}
 }
 
+void make_papyrus(VoxelManipulator &vmanip, v3s16 p0)
+{
+	MapNode papyrusnode(CONTENT_PAPYRUS);
+
+	s16 trunk_h = myrand_range(2, 3);
+	v3s16 p1 = p0;
+	for(s16 ii=0; ii<trunk_h; ii++)
+	{
+		if(vmanip.m_area.contains(p1))
+			vmanip.m_data[vmanip.m_area.index(p1)] = papyrusnode;
+		p1.Y++;
+	}
+}
+
+void make_cactus(VoxelManipulator &vmanip, v3s16 p0)
+{
+	MapNode cactusnode(CONTENT_CACTUS);
+
+	s16 trunk_h = 3;
+	v3s16 p1 = p0;
+	for(s16 ii=0; ii<trunk_h; ii++)
+	{
+		if(vmanip.m_area.contains(p1))
+			vmanip.m_data[vmanip.m_area.index(p1)] = cactusnode;
+		p1.Y++;
+	}
+}
+
 #if 0
 static void make_randomstone(VoxelManipulator &vmanip, v3s16 p0)
 {
@@ -1752,6 +1780,15 @@ void make_block(BlockMakeData *data)
 				u32 current_depth = 0;
 				bool air_detected = false;
 				bool water_detected = false;
+				bool have_clay = false;
+
+				// Determine whether to have clay in the sand here
+				double claynoise = noise2d_perlin(
+						0.5+(float)p2d.X/500, 0.5+(float)p2d.Y/500,
+						data->seed+4321, 6, 0.95);
+
+				have_clay = have_sand && (claynoise > 1.25);
+
 				// Use fast index incrementing
 				s16 start_y = node_max.Y+2;
 				v3s16 em = vmanip.m_area.getExtent();
@@ -1778,7 +1815,10 @@ void make_block(BlockMakeData *data)
 						{
 							if(have_sand)
 							{
-								vmanip.m_data[i] = MapNode(CONTENT_SAND);
+								if (have_clay)
+									vmanip.m_data[i] = MapNode(CONTENT_CLAY);
+								else
+									vmanip.m_data[i] = MapNode(CONTENT_SAND);
 							}
 							#if 1
 							else if(current_depth==0 && !water_detected
@@ -1823,7 +1863,7 @@ void make_block(BlockMakeData *data)
 			//s16 y = find_ground_level(data->vmanip, v2s16(x,z));
 			s16 y = find_ground_level_from_noise(data->seed, v2s16(x,z), 4);
 			// Don't make a tree under water level
-			if(y < WATER_LEVEL)
+			if(y < WATER_LEVEL - 1)
 				continue;
 			// Make sure tree fits (only trees whose starting point is
 			// at this block are added)
@@ -1847,19 +1887,36 @@ void make_block(BlockMakeData *data)
 			// If not found, handle next one
 			if(found == false)
 				continue;
-			/*
-				Trees grow only on mud and grass
-			*/
+
 			{
 				u32 i = data->vmanip->m_area.index(p);
 				MapNode *n = &data->vmanip->m_data[i];
-				if(n->d != CONTENT_MUD && n->d != CONTENT_GRASS)
+
+				if(n->d != CONTENT_MUD && n->d != CONTENT_GRASS && n->d != CONTENT_SAND)
+						continue;
+
+				// Papyrus grows only on mud and in water
+				if(n->d == CONTENT_MUD && y == WATER_LEVEL - 1)
+				{
+					p.Y++;
+					make_papyrus(vmanip, p);
+				}
+				// Don't make a tree under water level
+				if(y < WATER_LEVEL)
 					continue;
+				// Trees grow only on mud and grass
+				if(n->d == CONTENT_MUD || n->d == CONTENT_GRASS)
+				{
+					p.Y++;
+					make_tree(vmanip, p);
+				}
+				// Cactii grow only on sand
+				else if(n->d == CONTENT_SAND)
+				{
+					p.Y++;
+					make_cactus(vmanip, p);
+				}
 			}
-			// Tree will be placed one higher
-			p.Y++;
-			// Make a tree
-			make_tree(vmanip, p);
 		}
 
 #if 0