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, 76 insertions, 66 deletions

diff --git a/source/blender/blenkernel/intern/particle_distribute.c b/source/blender/blenkernel/intern/particle_distribute.c
index bf21e18f4b9..e85a3f15022 100644
--- a/source/blender/blenkernel/intern/particle_distribute.c
+++ b/source/blender/blenkernel/intern/particle_distribute.c
@@ -50,9 +50,8 @@
 #include "DNA_particle_types.h"
 #include "DNA_scene_types.h"
 
-#include "BKE_cdderivedmesh.h"
-#include "BKE_DerivedMesh.h"
 #include "BKE_global.h"
+#include "BKE_library.h"
 #include "BKE_mesh.h"
 #include "BKE_object.h"
 #include "BKE_particle.h"
@@ -80,7 +79,7 @@ static void alloc_child_particles(ParticleSystem *psys, int tot)
 	}
 }
 
-static void distribute_simple_children(Scene *scene, Object *ob, DerivedMesh *finaldm, DerivedMesh *deformdm, ParticleSystem *psys, const bool use_render_params)
+static void distribute_simple_children(Scene *scene, Object *ob, Mesh *final_mesh, Mesh *deform_mesh, ParticleSystem *psys, const bool use_render_params)
 {
 	ChildParticle *cpa = NULL;
 	int i, p;
@@ -107,14 +106,14 @@ static void distribute_simple_children(Scene *scene, Object *ob, DerivedMesh *fi
 		}
 	}
 	/* dmcache must be updated for parent particles if children from faces is used */
-	psys_calc_dmcache(ob, finaldm, deformdm, psys);
+	psys_calc_dmcache(ob, final_mesh, deform_mesh, psys);
 }
-static void distribute_grid(DerivedMesh *dm, ParticleSystem *psys)
+static void distribute_grid(Mesh *mesh, ParticleSystem *psys)
 {
 	ParticleData *pa=NULL;
 	float min[3], max[3], delta[3], d;
-	MVert *mv, *mvert = dm->getVertDataArray(dm,0);
-	int totvert=dm->getNumVerts(dm), from=psys->part->from;
+	MVert *mv, *mvert = mesh->mvert;
+	int totvert=mesh->totvert, from=psys->part->from;
 	int i, j, k, p, res=psys->part->grid_res, size[3], axis;
 
 	/* find bounding box of dm */
@@ -196,8 +195,8 @@ static void distribute_grid(DerivedMesh *dm, ParticleSystem *psys)
 		int a, a1, a2, a0mul, a1mul, a2mul, totface;
 		int amax= from==PART_FROM_FACE ? 3 : 1;
 
-		totface=dm->getNumTessFaces(dm);
-		mface=mface_array=dm->getTessFaceDataArray(dm,CD_MFACE);
+		totface = mesh->totface;
+		mface = mface_array = mesh->mface;
 		
 		for (a=0; a<amax; a++) {
 			if (a==0) { a0mul=res*res; a1mul=res; a2mul=1; }
@@ -440,7 +439,7 @@ static void distribute_from_verts_exec(ParticleTask *thread, ParticleData *pa, i
 	ParticleThreadContext *ctx= thread->ctx;
 	MFace *mface;
 
-	mface = ctx->dm->getTessFaceDataArray(ctx->dm, CD_MFACE);
+	mface = ctx->mesh->mface;
 
 	int rng_skip_tot = PSYS_RND_DIST_SKIP; /* count how many rng_* calls wont need skipping */
 
@@ -449,12 +448,12 @@ static void distribute_from_verts_exec(ParticleTask *thread, ParticleData *pa, i
 
 	zero_v4(pa->fuv);
 
-	if (pa->num != DMCACHE_NOTFOUND && pa->num < ctx->dm->getNumVerts(ctx->dm)) {
+	if (pa->num != DMCACHE_NOTFOUND && pa->num < ctx->mesh->totvert) {
 
 		/* This finds the first face to contain the emitting vertex,
 		 * this is not ideal, but is mostly fine as UV seams generally
 		 * map to equal-colored parts of a texture */
-		for (int i = 0; i < ctx->dm->getNumTessFaces(ctx->dm); i++, mface++) {
+		for (int i = 0; i < ctx->mesh->totface; i++, mface++) {
 			if (ELEM(pa->num, mface->v1, mface->v2, mface->v3, mface->v4)) {
 				unsigned int *vert = &mface->v1;
 
@@ -475,7 +474,7 @@ static void distribute_from_verts_exec(ParticleTask *thread, ParticleData *pa, i
 		KDTreeNearest ptn[3];
 		int w, maxw;
 		
-		psys_particle_on_dm(ctx->dm,from,pa->num,pa->num_dmcache,pa->fuv,pa->foffset,co1,0,0,0,orco1,0);
+		psys_particle_on_dm(ctx->mesh,from,pa->num,pa->num_dmcache,pa->fuv,pa->foffset,co1,0,0,0,orco1,0);
 		BKE_mesh_orco_verts_transform((Mesh*)ob->data, &orco1, 1, 1);
 		maxw = BLI_kdtree_find_nearest_n(ctx->tree,orco1,ptn,3);
 		
@@ -491,7 +490,7 @@ static void distribute_from_verts_exec(ParticleTask *thread, ParticleData *pa, i
 
 static void distribute_from_faces_exec(ParticleTask *thread, ParticleData *pa, int p) {
 	ParticleThreadContext *ctx= thread->ctx;
-	DerivedMesh *dm= ctx->dm;
+	Mesh *mesh = ctx->mesh;
 	float randu, randv;
 	int distr= ctx->distr;
 	int i;
@@ -500,7 +499,7 @@ static void distribute_from_faces_exec(ParticleTask *thread, ParticleData *pa, i
 	MFace *mface;
 	
 	pa->num = i = ctx->index[p];
-	mface = dm->getTessFaceData(dm,i,CD_MFACE);
+	mface = &mesh->mface[i];
 	
 	switch (distr) {
 		case PART_DISTR_JIT:
@@ -533,7 +532,7 @@ static void distribute_from_faces_exec(ParticleTask *thread, ParticleData *pa, i
 
 static void distribute_from_volume_exec(ParticleTask *thread, ParticleData *pa, int p) {
 	ParticleThreadContext *ctx= thread->ctx;
-	DerivedMesh *dm= ctx->dm;
+	Mesh *mesh = ctx->mesh;
 	float *v1, *v2, *v3, *v4, nor[3], co[3];
 	float cur_d, min_d, randu, randv;
 	int distr= ctx->distr;
@@ -541,10 +540,10 @@ static void distribute_from_volume_exec(ParticleTask *thread, ParticleData *pa,
 	int rng_skip_tot= PSYS_RND_DIST_SKIP; /* count how many rng_* calls wont need skipping */
 	
 	MFace *mface;
-	MVert *mvert=dm->getVertDataArray(dm,CD_MVERT);
+	MVert *mvert = mesh->mvert;
 	
 	pa->num = i = ctx->index[p];
-	mface = dm->getTessFaceData(dm,i,CD_MFACE);
+	mface = &mesh->mface[i];
 	
 	switch (distr) {
 		case PART_DISTR_JIT:
@@ -572,7 +571,7 @@ static void distribute_from_volume_exec(ParticleTask *thread, ParticleData *pa,
 	pa->foffset= 0.0f;
 	
 	/* experimental */
-	tot=dm->getNumTessFaces(dm);
+	tot = mesh->totface;
 	
 	psys_interpolate_face(mvert,mface,0,0,pa->fuv,co,nor,0,0,0);
 	
@@ -582,7 +581,7 @@ static void distribute_from_volume_exec(ParticleTask *thread, ParticleData *pa,
 	min_d=FLT_MAX;
 	intersect=0;
 	
-	for (i=0,mface=dm->getTessFaceDataArray(dm,CD_MFACE); i<tot; i++,mface++) {
+	for (i=0, mface=mesh->mface; i<tot; i++,mface++) {
 		if (i==pa->num) continue;
 		
 		v1=mvert[mface->v1].co;
@@ -628,7 +627,7 @@ static void distribute_from_volume_exec(ParticleTask *thread, ParticleData *pa,
 static void distribute_children_exec(ParticleTask *thread, ChildParticle *cpa, int p) {
 	ParticleThreadContext *ctx= thread->ctx;
 	Object *ob= ctx->sim.ob;
-	DerivedMesh *dm= ctx->dm;
+	Mesh *mesh = ctx->mesh;
 	float orco1[3], co1[3], nor1[3];
 	float randu, randv;
 	int cfrom= ctx->cfrom;
@@ -644,7 +643,7 @@ static void distribute_children_exec(ParticleTask *thread, ChildParticle *cpa, i
 		return;
 	}
 	
-	mf= dm->getTessFaceData(dm, ctx->index[p], CD_MFACE);
+	mf = &mesh->mface[ctx->index[p]];
 	
 	randu= BLI_rng_get_float(thread->rng);
 	randv= BLI_rng_get_float(thread->rng);
@@ -661,7 +660,7 @@ static void distribute_children_exec(ParticleTask *thread, ChildParticle *cpa, i
 		int parent[10];
 		float pweight[10];
 		
-		psys_particle_on_dm(dm,cfrom,cpa->num,DMCACHE_ISCHILD,cpa->fuv,cpa->foffset,co1,nor1,NULL,NULL,orco1);
+		psys_particle_on_dm(mesh,cfrom,cpa->num,DMCACHE_ISCHILD,cpa->fuv,cpa->foffset,co1,nor1,NULL,NULL,orco1);
 		BKE_mesh_orco_verts_transform((Mesh*)ob->data, &orco1, 1, 1);
 		maxw = BLI_kdtree_find_nearest_n(ctx->tree,orco1,ptn,3);
 		
@@ -800,19 +799,18 @@ static void distribute_invalid(ParticleSimulationData *sim, int from)
 	}
 }
 
-/* Creates a distribution of coordinates on a DerivedMesh */
-/* This is to denote functionality that does not yet work with mesh - only derived mesh */
+/* Creates a distribution of coordinates on a Mesh */
 static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, ParticleSimulationData *sim, int from)
 {
 	Scene *scene = sim->scene;
-	DerivedMesh *finaldm = sim->psmd->dm_final;
+	Mesh *final_mesh = sim->psmd->mesh_final;
 	Object *ob = sim->ob;
 	ParticleSystem *psys= sim->psys;
 	ParticleData *pa=0, *tpars= 0;
 	ParticleSettings *part;
 	ParticleSeam *seams= 0;
 	KDTree *tree=0;
-	DerivedMesh *dm= NULL;
+	Mesh *mesh = NULL;
 	float *jit= NULL;
 	int i, p=0;
 	int cfrom=0;
@@ -829,7 +827,7 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti
 	if (totpart==0)
 		return 0;
 	
-	if (!finaldm->deformedOnly && !finaldm->getTessFaceDataArray(finaldm, CD_ORIGINDEX)) {
+	if (!final_mesh->runtime.deformed_only && !CustomData_get_layer(&final_mesh->fdata, CD_ORIGINDEX)) {
 		printf("Can't create particles with the current modifier stack, disable destructive modifiers\n");
 // XXX		error("Can't paint with the current modifier stack, disable destructive modifiers");
 		return 0;
@@ -849,7 +847,7 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti
 		/* Simple children */
 		if (part->childtype != PART_CHILD_FACES) {
 			BLI_srandom(31415926 + psys->seed + psys->child_seed);
-			distribute_simple_children(scene, ob, finaldm, sim->psmd->dm_deformed, psys, use_render_params);
+			distribute_simple_children(scene, ob, final_mesh, sim->psmd->mesh_deformed, psys, use_render_params);
 			return 0;
 		}
 	}
@@ -859,17 +857,23 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti
 			BLI_srandom(31415926 + psys->seed);
 
 			if (psys->part->use_modifier_stack) {
-				dm = finaldm;
+				mesh = final_mesh;
 			}
 			else {
-				dm = CDDM_from_mesh((Mesh*)ob->data);
+				BKE_id_copy_ex(
+				        NULL, ob->data, (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);
 			}
-			DM_ensure_tessface(dm);
+			BKE_mesh_tessface_ensure(mesh);
 
-			distribute_grid(dm,psys);
+			distribute_grid(mesh,psys);
 
-			if (dm != finaldm) {
-				dm->release(dm);
+			if (mesh != final_mesh) {
+				BKE_id_free(NULL, mesh);
 			}
 
 			return 0;
@@ -880,17 +884,17 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti
 	if (from == PART_FROM_CHILD) {
 		distr=PART_DISTR_RAND;
 		BLI_srandom(31415926 + psys->seed + psys->child_seed);
-		dm= finaldm;
+		mesh= final_mesh;
 
 		/* BMESH ONLY */
-		DM_ensure_tessface(dm);
+		BKE_mesh_tessface_ensure(mesh);
 
 		children=1;
 
 		tree=BLI_kdtree_new(totpart);
 
 		for (p=0,pa=psys->particles; p<totpart; p++,pa++) {
-			psys_particle_on_dm(dm,part->from,pa->num,pa->num_dmcache,pa->fuv,pa->foffset,co,nor,0,0,orco);
+			psys_particle_on_dm(mesh,part->from,pa->num,pa->num_dmcache,pa->fuv,pa->foffset,co,nor,0,0,orco);
 			BKE_mesh_orco_verts_transform((Mesh*)ob->data, &orco, 1, 1);
 			BLI_kdtree_insert(tree, p, orco);
 		}
@@ -905,20 +909,26 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti
 		BLI_srandom(31415926 + psys->seed);
 		
 		if (psys->part->use_modifier_stack)
-			dm = finaldm;
+			mesh = final_mesh;
 		else
-			dm= CDDM_from_mesh((Mesh*)ob->data);
+			BKE_id_copy_ex(
+			            NULL, ob->data, (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);
 
-		DM_ensure_tessface(dm);
+		BKE_mesh_tessface_ensure(mesh);
 
 		/* we need orco for consistent distributions */
-		if (!CustomData_has_layer(&dm->vertData, CD_ORCO))
-			DM_add_vert_layer(dm, CD_ORCO, CD_ASSIGN, BKE_mesh_orco_verts_get(ob));
+		if (!CustomData_has_layer(&mesh->vdata, CD_ORCO))
+			CustomData_add_layer(&mesh->vdata, CD_ORCO, CD_ASSIGN, BKE_mesh_orco_verts_get(ob), mesh->totvert);
 
 		if (from == PART_FROM_VERT) {
-			MVert *mv= dm->getVertDataArray(dm, CD_MVERT);
-			float (*orcodata)[3] = dm->getVertDataArray(dm, CD_ORCO);
-			int totvert = dm->getNumVerts(dm);
+			MVert *mv = mesh->mvert;
+			float (*orcodata)[3] = CustomData_get_layer(&mesh->vdata, CD_ORCO);
+			int totvert = mesh->totvert;
 
 			tree=BLI_kdtree_new(totvert);
 
@@ -937,7 +947,7 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti
 	}
 
 	/* Get total number of emission elements and allocate needed arrays */
-	totelem = (from == PART_FROM_VERT) ? dm->getNumVerts(dm) : dm->getNumTessFaces(dm);
+	totelem = (from == PART_FROM_VERT) ? mesh->totvert : mesh->totface;
 
 	if (totelem == 0) {
 		distribute_invalid(sim, children ? PART_FROM_CHILD : 0);
@@ -945,7 +955,7 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti
 		if (G.debug & G_DEBUG)
 			fprintf(stderr,"Particle distribution error: Nothing to emit from!\n");
 
-		if (dm != finaldm) dm->release(dm);
+		if (mesh != final_mesh) BKE_id_free(NULL, mesh);
 
 		BLI_kdtree_free(tree);
 
@@ -962,10 +972,10 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti
 		float totarea=0.f, co1[3], co2[3], co3[3], co4[3];
 		float (*orcodata)[3];
 		
-		orcodata= dm->getVertDataArray(dm, CD_ORCO);
+		orcodata = CustomData_get_layer(&mesh->vdata, CD_ORCO);
 
 		for (i=0; i<totelem; i++) {
-			MFace *mf=dm->getTessFaceData(dm,i,CD_MFACE);
+			MFace *mf = &mesh->mface[i];
 
 			if (orcodata) {
 				copy_v3_v3(co1, orcodata[mf->v1]);
@@ -980,14 +990,14 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti
 				}
 			}
 			else {
-				v1= (MVert*)dm->getVertData(dm,mf->v1,CD_MVERT);
-				v2= (MVert*)dm->getVertData(dm,mf->v2,CD_MVERT);
-				v3= (MVert*)dm->getVertData(dm,mf->v3,CD_MVERT);
+				v1 = &mesh->mvert[mf->v1];
+				v2 = &mesh->mvert[mf->v2];
+				v3 = &mesh->mvert[mf->v3];
 				copy_v3_v3(co1, v1->co);
 				copy_v3_v3(co2, v2->co);
 				copy_v3_v3(co3, v3->co);
 				if (mf->v4) {
-					v4= (MVert*)dm->getVertData(dm,mf->v4,CD_MVERT);
+					v4 = &mesh->mvert[mf->v4];
 					copy_v3_v3(co4, v4->co);
 				}
 			}
@@ -1014,7 +1024,7 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti
 	}
 
 	/* Calculate weights from vgroup */
-	vweight = psys_cache_vgroup(dm,psys,PSYS_VG_DENSITY);
+	vweight = psys_cache_vgroup(mesh,psys,PSYS_VG_DENSITY);
 
 	if (vweight) {
 		if (from==PART_FROM_VERT) {
@@ -1023,7 +1033,7 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti
 		}
 		else { /* PART_FROM_FACE / PART_FROM_VOLUME */
 			for (i=0;i<totelem; i++) {
-				MFace *mf=dm->getTessFaceData(dm,i,CD_MFACE);
+				MFace *mf = &mesh->mface[i];
 				tweight = vweight[mf->v1] + vweight[mf->v2] + vweight[mf->v3];
 				
 				if (mf->v4) {
@@ -1126,12 +1136,12 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti
 		int *orig_index = NULL;
 
 		if (from == PART_FROM_VERT) {
-			if (dm->numVertData)
-				orig_index = dm->getVertDataArray(dm, CD_ORIGINDEX);
+			if (mesh->totvert)
+				orig_index = CustomData_get_layer(&mesh->vdata, CD_ORIGINDEX);
 		}
 		else {
-			if (dm->numTessFaceData)
-				orig_index = dm->getTessFaceDataArray(dm, CD_ORIGINDEX);
+			if (mesh->totface)
+				orig_index = CustomData_get_layer(&mesh->fdata, CD_ORIGINDEX);
 		}
 
 		if (orig_index) {
@@ -1174,7 +1184,7 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti
 	ctx->maxweight= maxweight;
 	ctx->cfrom= cfrom;
 	ctx->distr= distr;
-	ctx->dm= dm;
+	ctx->mesh= mesh;
 	ctx->tpars= tpars;
 
 	if (children) {
@@ -1198,7 +1208,7 @@ static void distribute_particles_on_dm(ParticleSimulationData *sim, int from)
 	TaskPool *task_pool;
 	ParticleThreadContext ctx;
 	ParticleTask *tasks;
-	DerivedMesh *finaldm = sim->psmd->dm_final;
+	Mesh *final_mesh = sim->psmd->mesh_final;
 	int i, totpart, numtasks;
 	
 	/* create a task pool for distribution tasks */
@@ -1223,10 +1233,10 @@ static void distribute_particles_on_dm(ParticleSimulationData *sim, int from)
 	
 	BLI_task_pool_free(task_pool);
 	
-	psys_calc_dmcache(sim->ob, finaldm, sim->psmd->dm_deformed, sim->psys);
+	psys_calc_dmcache(sim->ob, final_mesh, sim->psmd->mesh_deformed, sim->psys);
 	
-	if (ctx.dm != finaldm)
-		ctx.dm->release(ctx.dm);
+	if (ctx.mesh != final_mesh)
+		BKE_id_free(NULL, ctx.mesh);
 	
 	psys_tasks_free(tasks, numtasks);
 	
@@ -1247,7 +1257,7 @@ void distribute_particles(ParticleSimulationData *sim, int from)
 	int distr_error=0;
 
 	if (psmd) {
-		if (psmd->dm_final)
+		if (psmd->mesh_final)
 			distribute_particles_on_dm(sim, from);
 		else
 			distr_error=1;