Fix T75111: Crash when using subframes for animated fluid collider

This is not dependent on having an armature as mentioned in T75111.
The collider simply has to be animated.

Reviewers: sebbas

Differential Revision: https://developer.blender.org/D7251

1 files changed, 11 insertions, 7 deletions

diff --git a/source/blender/blenkernel/intern/fluid.c b/source/blender/blenkernel/intern/fluid.c
index ae51c997a08..310410d8e0f 100644
--- a/source/blender/blenkernel/intern/fluid.c
+++ b/source/blender/blenkernel/intern/fluid.c
@@ -770,7 +770,9 @@ static void bb_combineMaps(FluidObjectBB *output,
 
           /* Values. */
           output->numobjs[index_out] = bb1.numobjs[index_in];
-          output->influence[index_out] = bb1.influence[index_in];
+          if (output->influence && bb1.influence) {
+            output->influence[index_out] = bb1.influence[index_in];
+          }
           output->distances[index_out] = bb1.distances[index_in];
           if (output->velocity && bb1.velocity) {
             copy_v3_v3(&output->velocity[index_out * 3], &bb1.velocity[index_in * 3]);
@@ -785,12 +787,14 @@ static void bb_combineMaps(FluidObjectBB *output,
 
           /* Values. */
           output->numobjs[index_out] = MAX2(bb2->numobjs[index_in], output->numobjs[index_out]);
-          if (additive) {
-            output->influence[index_out] += bb2->influence[index_in] * sample_size;
-          }
-          else {
-            output->influence[index_out] = MAX2(bb2->influence[index_in],
-                                                output->influence[index_out]);
+          if (output->influence && bb2->influence) {
+            if (additive) {
+              output->influence[index_out] += bb2->influence[index_in] * sample_size;
+            }
+            else {
+              output->influence[index_out] = MAX2(bb2->influence[index_in],
+                                                  output->influence[index_out]);
+            }
           }
           output->distances[index_out] = MIN2(bb2->distances[index_in],
                                               output->distances[index_out]);