From 81ab9ef968d392aa8edc79566bf02e23f93da7a8 Mon Sep 17 00:00:00 2001 From: Sergey Sharybin Date: Thu, 27 Dec 2018 11:35:31 +0100 Subject: Fix T56595: Hair Dynamics stop working after saving new file The issue was caused by NaN valid of the average spring length being stored in the file. This caused accumulation in the springs builder to also deliver NaNs, which then caused solver itself to not do anything. Not sure why these values where never initialized prior to the accumulation. Or even, why this runime data is stored in a DNA. Some sanitizing is possible here, but needs to be done with care to not disrupt Spring production. --- source/blender/blenkernel/intern/cloth.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'source/blender/blenkernel/intern/cloth.c') diff --git a/source/blender/blenkernel/intern/cloth.c b/source/blender/blenkernel/intern/cloth.c index 9666b1ef68f..5396a1905b9 100644 --- a/source/blender/blenkernel/intern/cloth.c +++ b/source/blender/blenkernel/intern/cloth.c @@ -1285,6 +1285,11 @@ static int cloth_build_springs ( ClothModifierData *clmd, DerivedMesh *dm ) if (!edgelist) return 0; + clmd->sim_parms->avg_spring_len = 0.0f; + for (i = 0; i < mvert_num; i++) { + cloth->verts[i].avg_spring_len = 0.0f; + } + // structural springs for ( i = 0; i < numedges; i++ ) { spring = (ClothSpring *)MEM_callocN ( sizeof ( ClothSpring ), "cloth spring" ); -- cgit v1.2.3