From 3c14787064cba769be045a56de5406fa791ad541 Mon Sep 17 00:00:00 2001
From: jacksonmj <mj-pt@jacksonmj.co.uk>
Date: Sun, 10 Jun 2012 22:31:01 +0100
Subject: [PATCH] Prevent THDR from counting towards stacked particle limit

---
 src/powder.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/powder.c b/src/powder.c
index 2e55f49aa..de06b1678 100644
--- a/src/powder.c
+++ b/src/powder.c
@@ -2864,7 +2864,10 @@ void update_particles(pixel *vid)//doesn't update the particles themselves, but
 					// To make particles collide correctly when inside these elements, these elements must not overwrite an existing pmap entry from particles inside them
 					if (!pmap[y][x] || (t!=PT_INVIS && t!= PT_FILT))
 						pmap[y][x] = t|(i<<8);
-					pmap_count[y][x]++;
+					// Count number of particles at each location, for excess stacking check
+					// (does not include energy particles or THDR - currently no limit on stacking those)
+					if (t!=PT_THDR)
+						pmap_count[y][x]++;
 				}
 			}
 			lastPartUsed = i;