Fix [#36265]: Smoke doesn't work if domain object has negative scale.

1 files changed, 7 insertions, 4 deletions

diff --git a/source/blender/blenkernel/intern/smoke.c b/source/blender/blenkernel/intern/smoke.c
index b2c0a45cbc4..789b0ec5823 100644
--- a/source/blender/blenkernel/intern/smoke.c
+++ b/source/blender/blenkernel/intern/smoke.c
@@ -259,7 +259,10 @@ static void smoke_set_domain_from_derivedmesh(SmokeDomainSettings *sds, Object *
 		zero_v3_int(sds->base_res);
 		copy_v3_v3(sds->cell_size, size);
 	}
-	mul_v3_v3(size, ob->size);
+	/* apply object scale */
+	for (i = 0; i < 3; i++) {
+		size[i] = fabs(size[i] * ob->size[i]);
+	}
 	copy_v3_v3(sds->global_size, size);
 	copy_v3_v3(sds->dp0, min);
 
@@ -272,21 +275,21 @@ static void smoke_set_domain_from_derivedmesh(SmokeDomainSettings *sds, Object *
 	/* define grid resolutions from longest domain side */
 	if (size[0] >= MAX2(size[1], size[2])) {
 		scale = res / size[0];
-		sds->scale = size[0] / ob->size[0];
+		sds->scale = size[0] / fabs(ob->size[0]);
 		sds->base_res[0] = res;
 		sds->base_res[1] = (int)(size[1] * scale + 0.5f);
 		sds->base_res[2] = (int)(size[2] * scale + 0.5f);
 	}
 	else if (size[1] >= MAX2(size[0], size[2])) {
 		scale = res / size[1];
-		sds->scale = size[1] / ob->size[1];
+		sds->scale = size[1] / fabs(ob->size[1]);
 		sds->base_res[0] = (int)(size[0] * scale + 0.5f);
 		sds->base_res[1] = res;
 		sds->base_res[2] = (int)(size[2] * scale + 0.5f);
 	}
 	else {
 		scale = res / size[2];
-		sds->scale = size[2] / ob->size[2];
+		sds->scale = size[2] / fabs(ob->size[2]);
 		sds->base_res[0] = (int)(size[0] * scale + 0.5f);
 		sds->base_res[1] = (int)(size[1] * scale + 0.5f);
 		sds->base_res[2] = res;