Fix T49738: Hair Add Brush doesn't work

the issue was caused by wrong default value for brush particle count
which was clamped on display from 0 to 1. This is technically a regression
but how to port this to 2.78a?

2 files changed, 15 insertions, 0 deletions

diff --git a/source/blender/blenloader/intern/versioning_270.c b/source/blender/blenloader/intern/versioning_270.c
index 0d4ff00b775..a2a10f5ccd8 100644
--- a/source/blender/blenloader/intern/versioning_270.c
+++ b/source/blender/blenloader/intern/versioning_270.c
@@ -1425,4 +1425,18 @@ void blo_do_versions_270(FileData *fd, Library *UNUSED(lib), Main *main)
 			}
 		}
 	}
+
+	{
+		for (Scene *scene = main->scene.first; scene != NULL; scene = scene->id.next) {
+			if (scene->toolsettings != NULL) {
+				ToolSettings *ts = scene->toolsettings;
+				ParticleEditSettings *pset = &ts->particle;
+				for (int a = 0; a < PE_TOT_BRUSH; a++) {
+					if (pset->brush[a].count == 0) {
+						pset->brush[a].count = 10;
+					}
+				}
+			}
+		}
+	}
 }
diff --git a/source/blender/blenloader/intern/versioning_defaults.c b/source/blender/blenloader/intern/versioning_defaults.c
index ec817b9b261..99d9e140481 100644
--- a/source/blender/blenloader/intern/versioning_defaults.c
+++ b/source/blender/blenloader/intern/versioning_defaults.c
@@ -147,6 +147,7 @@ void BLO_update_defaults_startup_blend(Main *bmain)
 			ParticleEditSettings *pset = &ts->particle;
 			for (int a = 0; a < PE_TOT_BRUSH; a++) {
 				pset->brush[a].strength = 0.5f;
+				pset->brush[a].count = 10;
 			}
 			pset->brush[PE_BRUSH_CUT].strength = 1.0f;
 		}