From f93a829672c7aabb09ae9b958623a97105b8e28d Mon Sep 17 00:00:00 2001
From: savask <savask@yandex.ru>
Date: Thu, 19 Apr 2012 21:40:28 +0700
Subject: [PATCH] Fix sponge bug.

---
 includes/powder.h | 1 +
 src/elementdata.c | 2 +-
 src/powder.c      | 7 +++++--
 src/save.c        | 5 +++++
 4 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/includes/powder.h b/includes/powder.h
index 5db61dbd6..99d3afc26 100644
--- a/includes/powder.h
+++ b/includes/powder.h
@@ -254,6 +254,7 @@
 
 #define FLAG_STAGNANT	1
 #define FLAG_SKIPMOVE	0x2 // skip movement for one frame, only implemented for PHOT
+#define FLAG_MOVABLE	0x4 // if can move
 
 #define GRAPHICS_FUNC_ARGS particle *cpart, int nx, int ny, int *pixel_mode, int* cola, int *colr, int *colg, int *colb, int *firea, int *firer, int *fireg, int *fireb
 #define GRAPHICS_FUNC_SUBCALL_ARGS cpart, nx, ny, pixel_mode, cola, colr, colg, colb, firea, firer, fireg, fireb
diff --git a/src/elementdata.c b/src/elementdata.c
index f72efa3b5..aa2544eb9 100644
--- a/src/elementdata.c
+++ b/src/elementdata.c
@@ -104,7 +104,7 @@ part_type ptypes[PT_NUM] =
 	{"LIGH",	PIXPACK(0xFFFFC0),	0.0f,	0.00f * CFDS,	0.90f,	0.00f,	0.0f,	0.0f,	0.00f,	0.000f	* CFDS,	0,	0,		0,	1,	1,	1,	1,	100,	SC_ELEC,		R_TEMP+0.0f	+273.15f,	0,	    "More realistic lightning. Set pen size to set the size of the lightning.", ST_SOLID, TYPE_SOLID, &update_LIGH, &graphics_LIGH},
     {"TESC",	PIXPACK(0x707040),	0.0f,	0.00f * CFDS,	0.90f,	0.00f,	0.0f,	0.0f,	0.00f,	0.000f	* CFDS,	0,	0,		0,	1,	1,	1,	1,	100,	SC_ELEC,		R_TEMP+0.0f	+273.15f,	251,	"Tesla coil!", ST_SOLID, TYPE_SOLID|PROP_CONDUCTS|PROP_LIFE_DEC|PROP_HOT_GLOW, NULL, NULL},
     {"DEST",	PIXPACK(0xFF3311),  -0.05f,	0.00f * CFDS,	0.95f,	0.95f,	-0.1f,	0.4f,	0.00f,	0.000f	* CFDS,	1,	0,		0,  0,	0,	1,	1,	101,	SC_EXPLOSIVE,	R_TEMP+0.0f	+273.15f,	150,	"More destructive Bomb.", ST_SOLID, TYPE_PART|PROP_LIFE_DEC|PROP_LIFE_KILL_DEC, &update_DEST, &graphics_DEST},
-	{"SPNG",  	PIXPACK(0xFFBE30),	0.00f, 	0.00f * CFDS,   0.00f,  1.00f,   0.00f, 0.0f,   0.00f,  0.000f  * CFDS, 0, 	20, 	0,  1, 	30,	1, 	1,	100,    SC_SOLIDS,  	R_TEMP+0.0f +273.15f,   251,    "A sponge, absorbs water.", ST_SOLID, TYPE_SOLID, &update_SPNG, &graphics_SPNG},
+	{"SPNG",  	PIXPACK(0xFFBE30),	0.00f, 	0.00f * CFDS,   0.00f,  0.0f,   0.00f, 0.0f,   0.00f,  0.000f  * CFDS, 0, 	20, 	0,  1, 	30,	1, 	1,	100,    SC_SOLIDS,  	R_TEMP+0.0f +273.15f,   251,    "A sponge, absorbs water.", ST_SOLID, TYPE_SOLID, &update_SPNG, &graphics_SPNG},
 	{"RIME",  	PIXPACK(0xCCCCCC),	0.00f, 	0.00f * CFDS,   0.00f,  1.00f,   0.00f, 0.0f,   0.00f,  0.000f  * CFDS, 0, 	0, 		0, 	0, 	30,	1,  1,	100,    SC_CRACKER2,  	243.15f,				100,    "Not quite Ice", ST_SOLID, TYPE_SOLID, &update_RIME, NULL},
 	{"FOG",  	PIXPACK(0xAAAAAA),	0.8f,	0.00f * CFDS,	0.4f,	0.70f,	-0.1f,	0.0f,	0.99f,	0.000f	* CFDS, 0, 	0, 		0,  0,  30, 1,  1,	1,		SC_CRACKER2,  	243.15f,				100,    "Not quite Steam", ST_GAS, TYPE_GAS|PROP_LIFE_DEC, &update_FOG, NULL},
 	{"BCLN",	PIXPACK(0xFFD040),	0.0f,	0.00f * CFDS,	0.97f,	0.50f,	0.0f,	0.0f,	0.00f,	0.000f	* CFDS,	0,	0,		0,	0,	12,	1,	1,	100,	SC_SPECIAL,		R_TEMP+0.0f	+273.15f,	251,	"Breakable Clone.", ST_NONE, TYPE_SOLID|PROP_LIFE_DEC|PROP_LIFE_KILL_DEC, &update_BCLN, NULL},
diff --git a/src/powder.c b/src/powder.c
index 98f023aa6..9c684e91d 100644
--- a/src/powder.c
+++ b/src/powder.c
@@ -1816,8 +1816,11 @@ void update_particles_i(pixel *vid, int start, int inc)
 				pGravY += gravy[(y/CELL)*(XRES/CELL)+(x/CELL)];
 			}
 			//velocity updates for the particle
-			parts[i].vx *= ptypes[t].loss;
-			parts[i].vy *= ptypes[t].loss;
+			if (!(parts[i].flags&FLAG_MOVABLE))
+			{
+				parts[i].vx *= ptypes[t].loss;
+				parts[i].vy *= ptypes[t].loss;
+			}
 			//particle gets velocity from the vx and vy maps
 			parts[i].vx += ptypes[t].advection*vx[y/CELL][x/CELL] + pGravX;
 			parts[i].vy += ptypes[t].advection*vy[y/CELL][x/CELL] + pGravY;
diff --git a/src/save.c b/src/save.c
index c56bdd319..a96cb052a 100644
--- a/src/save.c
+++ b/src/save.c
@@ -2136,6 +2136,11 @@ int parse_save_PSv(void *save, int size, int replace, int x0, int y0, unsigned c
 					STKM_init_legs(&(fighters[fcount]), i-1);
 				}
 			}
+			else if (parts[i-1].type == PT_SPNG)
+			{
+				if (fabs(parts[i-1].vx)>0.0f || fabs(parts[i-1].vy)>0.0f)
+					parts[i-1].flags |= FLAG_MOVABLE;
+			}
 
 			if (ver<48 && (ty==OLD_PT_WIND || (ty==PT_BRAY&&parts[i-1].life==0)))
 			{