From 732852ddf3507a1eb77a0426f97768a5ada028be Mon Sep 17 00:00:00 2001
From: CobaltXII <sidatt64@gmail.com>
Date: Thu, 3 Jan 2019 21:36:58 -0500
Subject: [PATCH] Crops can only be placed on farmland

---
 src/main.cpp | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/main.cpp b/src/main.cpp
index 7c64679..e245d94 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -791,6 +791,19 @@ int main(int argc, char** argv)
 										block_timer = 10;
 									}
 								}
+								else if (is_crop(place_id))
+								{
+									// Crops can only be placed on farmland.
+
+									block_id crops_below = the_world->get_id_safe(px, py + 1, pz);
+
+									if (crops_below == id_dry_farmland || crops_below == id_wet_farmland)
+									{
+										the_accessor->set_id_safe(px, py, pz, place_id);
+
+										block_timer = 10;
+									}
+								}
 								else
 								{
 									the_accessor->set_id_safe(px, py, pz, place_id);