Particle System: ported most DerivedMesh → Mesh

There are a few places where DerivedMesh is still used, most notably
when calling the (not yet ported) cloth simulation. There is also still
the use of Object.derivedDeform and Object.derivedFinal. Those places are
marked with a TODO.

Some functions in the editors module were copied to accept Mesh. Those
already had 'mesh' in the name; the copies are suffixed with '__real_mesh'
for easy renaming later when the DM-based functionality is removed.

1 files changed, 47 insertions, 29 deletions

diff --git a/source/blender/editors/physics/particle_object.c b/source/blender/editors/physics/particle_object.c
index 79d52abb32d..cb7c90a6c3d 100644
--- a/source/blender/editors/physics/particle_object.c
+++ b/source/blender/editors/physics/particle_object.c
@@ -33,6 +33,7 @@
 
 #include "MEM_guardedalloc.h"
 
+#include "DNA_mesh_types.h"
 #include "DNA_meshdata_types.h"
 #include "DNA_modifier_types.h"
 #include "DNA_scene_types.h"
@@ -48,6 +49,7 @@
 #include "BKE_global.h"
 #include "BKE_library.h"
 #include "BKE_main.h"
+#include "BKE_mesh.h"
 #include "BKE_modifier.h"
 #include "BKE_object.h"
 #include "BKE_particle.h"
@@ -574,7 +576,7 @@ static void disconnect_hair(
 			point++;
 		}
 
-		psys_mat_hair_to_global(ob, psmd->dm_final, psys->part->from, pa, hairmat);
+		psys_mat_hair_to_global(ob, psmd->mesh_final, psys->part->from, pa, hairmat);
 
 		for (k=0, key=pa->hair; k<pa->totkey; k++, key++) {
 			mul_m4_v3(hairmat, key->co);
@@ -653,13 +655,13 @@ static bool remap_hair_emitter(
 	MFace *mface = NULL, *mf;
 	MEdge *medge = NULL, *me;
 	MVert *mvert;
-	DerivedMesh *dm, *target_dm;
+	Mesh *mesh, *target_mesh;
 	int numverts;
 	int i, k;
 	float from_ob_imat[4][4], to_ob_imat[4][4];
 	float from_imat[4][4], to_imat[4][4];
 
-	if (!target_psmd->dm_final)
+	if (!target_psmd->mesh_final)
 		return false;
 	if (!psys->part || psys->part->type != PART_HAIR)
 		return false;
@@ -673,40 +675,46 @@ static bool remap_hair_emitter(
 	invert_m4_m4(from_imat, from_mat);
 	invert_m4_m4(to_imat, to_mat);
 	
-	if (target_psmd->dm_final->deformedOnly) {
+	if (target_psmd->mesh_final->runtime.deformed_only) {
 		/* we don't want to mess up target_psmd->dm when converting to global coordinates below */
-		dm = target_psmd->dm_final;
+		mesh = target_psmd->mesh_final;
 	}
 	else {
-		dm = target_psmd->dm_deformed;
+		mesh = target_psmd->mesh_deformed;
 	}
-	target_dm = target_psmd->dm_final;
-	if (dm == NULL) {
+	target_mesh = target_psmd->mesh_final;
+	if (mesh == NULL) {
 		return false;
 	}
 	/* don't modify the original vertices */
-	dm = CDDM_copy(dm);
+	BKE_id_copy_ex(
+	            NULL, &mesh->id, (ID **)&mesh,
+	            LIB_ID_CREATE_NO_MAIN |
+	            LIB_ID_CREATE_NO_USER_REFCOUNT |
+	            LIB_ID_CREATE_NO_DEG_TAG |
+	            LIB_ID_COPY_NO_PREVIEW,
+	            false);
 
 	/* BMESH_ONLY, deform dm may not have tessface */
-	DM_ensure_tessface(dm);
+	BKE_mesh_tessface_ensure(mesh);
 
-	numverts = dm->getNumVerts(dm);
-	mvert = dm->getVertArray(dm);
+	numverts = mesh->totvert;
+	mvert = mesh->mvert;
 
 	/* convert to global coordinates */
 	for (i=0; i<numverts; i++)
 		mul_m4_v3(to_mat, mvert[i].co);
 
-	if (dm->getNumTessFaces(dm) != 0) {
-		mface = dm->getTessFaceArray(dm);
-		bvhtree_from_mesh_get(&bvhtree, dm, BVHTREE_FROM_FACES, 2);
+	if (mesh->totface != 0) {
+		mface = mesh->mface;
+		BKE_bvhtree_from_mesh_get(&bvhtree, mesh, BVHTREE_FROM_FACES, 2);
 	}
-	else if (dm->getNumEdges(dm) != 0) {
-		medge = dm->getEdgeArray(dm);
-		bvhtree_from_mesh_get(&bvhtree, dm, BVHTREE_FROM_EDGES, 2);
+	else if (mesh->totedge != 0) {
+		medge = mesh->medge;
+		BKE_bvhtree_from_mesh_get(&bvhtree, mesh, BVHTREE_FROM_EDGES, 2);
 	}
 	else {
-		dm->release(dm);
+		BKE_id_free(NULL, mesh);
 		return false;
 	}
 
@@ -751,7 +759,7 @@ static bool remap_hair_emitter(
 			tpa->foffset = 0.0f;
 
 			tpa->num = nearest.index;
-			tpa->num_dmcache = psys_particle_dm_face_lookup(target_dm, dm, tpa->num, tpa->fuv, NULL);
+			tpa->num_dmcache = psys_particle_dm_face_lookup(target_mesh, mesh, tpa->num, tpa->fuv, NULL);
 		}
 		else {
 			me = &medge[nearest.index];
@@ -777,7 +785,7 @@ static bool remap_hair_emitter(
 				copy_m4_m4(imat, target_ob->obmat);
 			else {
 				/* note: using target_dm here, which is in target_ob object space and has full modifiers */
-				psys_mat_hair_to_object(target_ob, target_dm, target_psys->part->from, tpa, hairmat);
+				psys_mat_hair_to_object(target_ob, target_mesh, target_psys->part->from, tpa, hairmat);
 				invert_m4_m4(imat, hairmat);
 			}
 			mul_m4_m4m4(imat, imat, to_imat);
@@ -823,7 +831,7 @@ static bool remap_hair_emitter(
 	}
 
 	free_bvhtree_from_mesh(&bvhtree);
-	dm->release(dm);
+	BKE_id_free(NULL, mesh);
 
 	psys_free_path_cache(target_psys, target_edit);
 
@@ -994,7 +1002,7 @@ static bool copy_particle_systems_to_object(const bContext *C,
 	ModifierData *md;
 	ParticleSystem *psys_start = NULL, *psys, *psys_from;
 	ParticleSystem **tmp_psys;
-	DerivedMesh *final_dm;
+	Mesh *final_mesh;
 	CustomDataMask cdmask;
 	int i, totpsys;
 
@@ -1036,8 +1044,11 @@ static bool copy_particle_systems_to_object(const bContext *C,
 	psys_start = totpsys > 0 ? tmp_psys[0] : NULL;
 	
 	/* get the DM (psys and their modifiers have not been appended yet) */
-	final_dm = mesh_get_derived_final(depsgraph, scene, ob_to, cdmask);
-	
+	/* TODO(Sybren): use mesh_evaluated instead */
+	DerivedMesh *final_dm = mesh_get_derived_final(depsgraph, scene, ob_to, cdmask);
+	final_mesh = BKE_id_new_nomain(ID_ME, NULL);
+	DM_to_mesh(final_dm, final_mesh, ob_to, CD_MASK_EVERYTHING, false);
+
 	/* now append psys to the object and make modifiers */
 	for (i = 0, psys_from = PSYS_FROM_FIRST;
 	     i < totpsys;
@@ -1060,10 +1071,17 @@ static bool copy_particle_systems_to_object(const bContext *C,
 		modifier_unique_name(&ob_to->modifiers, (ModifierData *)psmd);
 		
 		psmd->psys = psys;
-		psmd->dm_final = CDDM_copy(final_dm);
-		CDDM_calc_normals(psmd->dm_final);
-		DM_ensure_tessface(psmd->dm_final);
-		
+		BKE_id_copy_ex(
+		            NULL, &final_mesh->id, (ID **)&psmd->mesh_final,
+		            LIB_ID_CREATE_NO_MAIN |
+		            LIB_ID_CREATE_NO_USER_REFCOUNT |
+		            LIB_ID_CREATE_NO_DEG_TAG |
+		            LIB_ID_COPY_NO_PREVIEW,
+		            false);
+
+		BKE_mesh_calc_normals(psmd->mesh_final);
+		BKE_mesh_tessface_ensure(psmd->mesh_final);
+
 		if (psys_from->edit) {
 			copy_particle_edit(depsgraph, scene, ob_to, psys, psys_from);
 		}