From c384b5ddbdcb4c0b26e55a824681db1f9753e496 Mon Sep 17 00:00:00 2001
From: Benjamin Meyer <>
Date: Thu, 4 Apr 2019 10:39:12 +0200
Subject: Fix: Erratic collision response when using constraints on colliders

Missing dependency, which made collission to access object transform
prior it was evaluated.

Reviewers: sergey

Differential Revision: https://developer.blender.org/D4636
---
 source/blender/modifiers/intern/MOD_collision.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'source/blender/modifiers/intern/MOD_collision.c')

diff --git a/source/blender/modifiers/intern/MOD_collision.c b/source/blender/modifiers/intern/MOD_collision.c
index 371a33ebfc6..2e56da6f100 100644
--- a/source/blender/modifiers/intern/MOD_collision.c
+++ b/source/blender/modifiers/intern/MOD_collision.c
@@ -240,6 +240,10 @@ static void deformVerts(
 	}
 }
 
+static void updateDepsgraph(ModifierData *UNUSED(md), const ModifierUpdateDepsgraphContext *ctx)
+{
+	DEG_add_modifier_to_transform_relation(ctx->node, "Collision Modifier");
+}
 
 ModifierTypeInfo modifierType_Collision = {
 	/* name */              "Collision",
@@ -261,7 +265,7 @@ ModifierTypeInfo modifierType_Collision = {
 	/* requiredDataMask */  NULL,
 	/* freeData */          freeData,
 	/* isDisabled */        NULL,
-	/* updateDepsgraph */   NULL,
+	/* updateDepsgraph */   updateDepsgraph,
 	/* dependsOnTime */     dependsOnTime,
 	/* dependsOnNormals */	NULL,
 	/* foreachObjectLink */ NULL,
-- 
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