Implement hair drawing with Draw Manager in Clay engine

Part of T51378

3 files changed, 28 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_particle.h b/source/blender/blenkernel/BKE_particle.h
index 2b6a84a2f87..90f7703b967 100644
--- a/source/blender/blenkernel/BKE_particle.h
+++ b/source/blender/blenkernel/BKE_particle.h
@@ -479,3 +479,10 @@ void BKE_particle_system_eval(struct EvaluationContext *eval_ctx,
                               struct ParticleSystem *psys);
 
 #endif
+
+/* Draw Cache */
+enum {
+	BKE_PARTICLE_BATCH_DIRTY_ALL = 0,
+};
+void BKE_particle_batch_cache_dirty(struct ParticleSystem *psys, int mode);
+void BKE_particle_batch_cache_free(struct ParticleSystem *psys);
diff --git a/source/blender/blenkernel/intern/particle.c b/source/blender/blenkernel/intern/particle.c
index b6f5f11846b..71257fdc4b4 100644
--- a/source/blender/blenkernel/intern/particle.c
+++ b/source/blender/blenkernel/intern/particle.c
@@ -4305,3 +4305,22 @@ void psys_apply_hair_lattice(Scene *scene, Object *ob, ParticleSystem *psys)
 		psys->flag |= PSYS_EDITED;
 	}
 }
+
+
+
+/* Draw Engine */
+void (*BKE_particle_batch_cache_dirty_cb)(ParticleSystem *psys, int mode) = NULL;
+void (*BKE_particle_batch_cache_free_cb)(ParticleSystem *psys) = NULL;
+
+void BKE_particle_batch_cache_dirty(ParticleSystem *psys, int mode)
+{
+	if (psys->batch_cache) {
+		BKE_particle_batch_cache_dirty_cb(psys, mode);
+	}
+}
+void BKE_particle_batch_cache_free(ParticleSystem *psys)
+{
+	if (psys->batch_cache) {
+		BKE_particle_batch_cache_free_cb(psys);
+	}
+}
diff --git a/source/blender/blenkernel/intern/particle_system.c b/source/blender/blenkernel/intern/particle_system.c
index c26ac056499..2da0b6aeb4f 100644
--- a/source/blender/blenkernel/intern/particle_system.c
+++ b/source/blender/blenkernel/intern/particle_system.c
@@ -4321,6 +4321,8 @@ void particle_system_update(Scene *scene, Object *ob, ParticleSystem *psys, cons
 	/* save matrix for duplicators, at rendertime the actual dupliobject's matrix is used so don't update! */
 	if (psys->renderdata==0)
 		invert_m4_m4(psys->imat, ob->obmat);
+
+	BKE_particle_batch_cache_dirty(psys, BKE_PARTICLE_BATCH_DIRTY_ALL);
 }
 
 /* ID looper */