Smoke Bugfix /enhancement: Load pre 2.65 pointcaches.

Warning: Just make sure that you DON'T free the cache at any point. This patch can only display existing pointcaches from e.g. 2.64

1 files changed, 86 insertions, 1 deletions

diff --git a/source/blender/blenkernel/intern/pointcache.c b/source/blender/blenkernel/intern/pointcache.c
index 968e9fe3206..8034c4d1de9 100644
--- a/source/blender/blenkernel/intern/pointcache.c
+++ b/source/blender/blenkernel/intern/pointcache.c
@@ -657,6 +657,85 @@ static int  ptcache_smoke_write(PTCacheFile *pf, void *smoke_v)
 
 	return ret;
 }
+
+/* read old smoke cache from 2.64 */
+static int ptcache_smoke_read_old(PTCacheFile *pf, void *smoke_v)
+{
+	SmokeModifierData *smd= (SmokeModifierData *)smoke_v;
+	SmokeDomainSettings *sds = smd->domain;
+	
+	if (sds->fluid) {
+		size_t res = sds->res[0]*sds->res[1]*sds->res[2];
+		float dt, dx, *dens, *heat, *heatold, *vx, *vy, *vz;
+		unsigned char *obstacles;
+		unsigned int out_len = (unsigned int)res * sizeof(float);
+		float *tmp_array = MEM_callocN(out_len, "Smoke old cache tmp");
+
+		int fluid_fields = smoke_get_data_flags(sds);
+
+		/* Part part of the new cache header */
+		sds->active_color[0] = 0.7f;
+		sds->active_color[1] = 0.7f;
+		sds->active_color[2] = 0.7f;
+		
+		smoke_export(sds->fluid, &dt, &dx, &dens, NULL, NULL, NULL, &heat, &heatold, &vx, &vy, &vz, NULL, NULL, NULL, &obstacles);
+
+		ptcache_file_compressed_read(pf, (unsigned char *)sds->shadow, out_len);
+		ptcache_file_compressed_read(pf, (unsigned char*)dens, out_len);
+		ptcache_file_compressed_read(pf, (unsigned char*)tmp_array, out_len);
+
+		if (fluid_fields & SM_ACTIVE_HEAT)
+		{
+			ptcache_file_compressed_read(pf, (unsigned char*)heat, out_len);
+			ptcache_file_compressed_read(pf, (unsigned char*)heatold, out_len);
+		}
+		else
+		{
+			ptcache_file_compressed_read(pf, (unsigned char*)tmp_array, out_len);
+			ptcache_file_compressed_read(pf, (unsigned char*)tmp_array, out_len);
+		}
+		ptcache_file_compressed_read(pf, (unsigned char*)vx, out_len);
+		ptcache_file_compressed_read(pf, (unsigned char*)vy, out_len);
+		ptcache_file_compressed_read(pf, (unsigned char*)vz, out_len);
+		ptcache_file_compressed_read(pf, (unsigned char*)tmp_array, out_len);
+		ptcache_file_compressed_read(pf, (unsigned char*)tmp_array, out_len);
+		ptcache_file_compressed_read(pf, (unsigned char*)tmp_array, out_len);
+		ptcache_file_compressed_read(pf, (unsigned char*)obstacles, (unsigned int)res);
+		ptcache_file_read(pf, &dt, 1, sizeof(float));
+		ptcache_file_read(pf, &dx, 1, sizeof(float));
+
+		MEM_freeN(tmp_array);
+
+		if (pf->data_types & (1<<BPHYS_DATA_SMOKE_HIGH) && sds->wt) {
+			int res = sds->res[0]*sds->res[1]*sds->res[2];
+			int res_big, res_big_array[3];
+			float *dens, *tcu, *tcv, *tcw;
+			unsigned int out_len = sizeof(float)*(unsigned int)res;
+			unsigned int out_len_big;
+			unsigned char *tmp_array_big;
+
+			smoke_turbulence_get_res(sds->wt, res_big_array);
+			res_big = res_big_array[0]*res_big_array[1]*res_big_array[2];
+			out_len_big = sizeof(float) * (unsigned int)res_big;
+
+			tmp_array_big = MEM_callocN(out_len_big, "Smoke old cache tmp");
+
+			smoke_turbulence_export(sds->wt, &dens, NULL, NULL, NULL, NULL, NULL, NULL, &tcu, &tcv, &tcw);
+
+			ptcache_file_compressed_read(pf, (unsigned char*)dens, out_len_big);
+			ptcache_file_compressed_read(pf, (unsigned char*)tmp_array_big, out_len_big);
+
+			ptcache_file_compressed_read(pf, (unsigned char*)tcu, out_len);
+			ptcache_file_compressed_read(pf, (unsigned char*)tcv, out_len);
+			ptcache_file_compressed_read(pf, (unsigned char*)tcw, out_len);
+
+			MEM_freeN(tmp_array_big);
+		}
+	}
+
+	return 1;	
+}
+
 static int ptcache_smoke_read(PTCacheFile *pf, void *smoke_v)
 {
 	SmokeModifierData *smd= (SmokeModifierData *)smoke_v;
@@ -671,7 +750,13 @@ static int ptcache_smoke_read(PTCacheFile *pf, void *smoke_v)
 
 	/* version header */
 	ptcache_file_read(pf, version, 4, sizeof(char));
-	if (strncmp(version, SMOKE_CACHE_VERSION, 4)) return 0;
+	if (strncmp(version, SMOKE_CACHE_VERSION, 4))
+	{
+		/* reset file pointer */
+		fseek(pf->fp, -4, SEEK_CUR);
+		return ptcache_smoke_read_old(pf, smoke_v);
+	}
+
 	/* fluid info */
 	ptcache_file_read(pf, &cache_fields, 1, sizeof(int));
 	ptcache_file_read(pf, &active_fields, 1, sizeof(int));