Particle system: Move runtime data to runtime field

Allows it to be preserved during copy-on-write update when on-geometry
related update is needed.

This is a required part for T63537, where we need to preserve the entire
evaluation data when object is tagged for only RECALC_COPY_ON_WRITE.

Reviewers: brecht

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D5023

1 files changed, 8 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_particle.h b/source/blender/blenkernel/BKE_particle.h
index 164dbbbf482..ca3a560286f 100644
--- a/source/blender/blenkernel/BKE_particle.h
+++ b/source/blender/blenkernel/BKE_particle.h
@@ -38,6 +38,7 @@ struct ParticleKey;
 struct ParticleSettings;
 struct ParticleSystem;
 struct ParticleSystemModifierData;
+struct ParticleSystemModifierDataRuntime;
 
 struct BVHTreeRay;
 struct BVHTreeRayHit;
@@ -608,6 +609,13 @@ float psys_get_current_display_percentage(struct ParticleSystem *psys,
 #define DMCACHE_NOTFOUND -1
 #define DMCACHE_ISCHILD -2
 
+/* **** Particle system modifier helpers.  **** */
+
+struct Mesh *BKE_particle_modifier_mesh_final_get(struct ParticleSystemModifierData *psmd);
+struct Mesh *BKE_particle_modifier_mesh_original_get(struct ParticleSystemModifierData *psmd);
+struct ParticleSystemModifierDataRuntime *BKE_particle_modifier_runtime_ensure(
+    struct ParticleSystemModifierData *psmd);
+
 /* **** Depsgraph evaluation **** */
 
 struct Depsgraph;