Modifier: skip calling MOD_deform_mesh_eval_get

This is only needed in certain cases.

When testing performance improvements to the modifier stack
it's useful to bypass this function.

1 files changed, 8 insertions, 3 deletions

diff --git a/source/blender/modifiers/intern/MOD_shrinkwrap.c b/source/blender/modifiers/intern/MOD_shrinkwrap.c
index e76731caae2..842ec46f364 100644
--- a/source/blender/modifiers/intern/MOD_shrinkwrap.c
+++ b/source/blender/modifiers/intern/MOD_shrinkwrap.c
@@ -136,12 +136,17 @@ static void deformVertsEM(ModifierData *md,
 {
   ShrinkwrapModifierData *swmd = (ShrinkwrapModifierData *)md;
   struct Scene *scene = DEG_get_evaluated_scene(ctx->depsgraph);
-  Mesh *mesh_src = MOD_deform_mesh_eval_get(
-      ctx->object, editData, mesh, NULL, numVerts, false, false);
+  Mesh *mesh_src = NULL;
+
+  if ((swmd->vgroup_name[0] != '\0') || (swmd->shrinkType == MOD_SHRINKWRAP_PROJECT)) {
+    mesh_src = MOD_deform_mesh_eval_get(ctx->object, editData, mesh, NULL, numVerts, false, false);
+  }
 
   struct MDeformVert *dvert = NULL;
   int defgrp_index = -1;
-  MOD_get_vgroup(ctx->object, mesh_src, swmd->vgroup_name, &dvert, &defgrp_index);
+  if (swmd->vgroup_name[0] != '\0') {
+    MOD_get_vgroup(ctx->object, mesh_src, swmd->vgroup_name, &dvert, &defgrp_index);
+  }
 
   shrinkwrapModifier_deform(
       swmd, ctx, scene, ctx->object, mesh_src, dvert, defgrp_index, vertexCos, numVerts);