From 06c0949beb5db99b718c8a8b9dbefaf6c1655006 Mon Sep 17 00:00:00 2001
From: Simon Robertshaw <simon@hardwired.org.uk>
Date: Tue, 26 Apr 2011 16:46:57 +0100
Subject: [PATCH] Gravity breaks elements like pressure does (Doesn't work for
 broken metal and needs tweaking a little)

---
 src/powder.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/powder.c b/src/powder.c
index 8409d1b91..63351305b 100644
--- a/src/powder.c
+++ b/src/powder.c
@@ -1668,8 +1668,12 @@ void update_particles_i(pixel *vid, int start, int inc)
 				if (ptransitions[t].plt!=PT_NUM)
 					t = ptransitions[t].plt;
 				else s = 0;
-			}
-			else s = 0;
+			} else if ((fabsf(gravy[y/CELL][x/CELL])+fabsf(gravx[y/CELL][x/CELL]))>(ptransitions[t].phv/4.0f)&&ptransitions[t].pht>-1) {
+				// particle type change due to high gravity
+				if (ptransitions[t].pht!=PT_NUM)
+					t = ptransitions[t].pht;
+				else s = 0;
+			} else s = 0;
 			if (s) { // particle type change occurred
 				parts[i].life = 0;
 				part_change_type(i,x,y,t);