blender-archive/source/blender/modifiers/intern/MOD_mirror.c

/*
* $Id$
*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software  Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2005 by the Blender Foundation.
* All rights reserved.
*
* Contributor(s): Daniel Dunbar
*                 Ton Roosendaal,
*                 Ben Batt,
*                 Brecht Van Lommel,
*                 Campbell Barton
*
* ***** END GPL LICENSE BLOCK *****
*
*/

#include "DNA_meshdata_types.h"
#include "DNA_object_types.h"

#include "BLI_math.h"
#include "BLI_smallhash.h"
#include "BLI_array.h"

#include "BKE_cdderivedmesh.h"
#include "BKE_mesh.h"
#include "BKE_modifier.h"
#include "BKE_deform.h"
#include "BKE_utildefines.h"
#include "BKE_tessmesh.h"

#include "MEM_guardedalloc.h"
#include "depsgraph_private.h"

static void initData(ModifierData *md)
{
	MirrorModifierData *mmd = (MirrorModifierData*) md;

	mmd->flag |= (MOD_MIR_AXIS_X | MOD_MIR_VGROUP);
	mmd->tolerance = 0.001;
	mmd->mirror_ob = NULL;
}

static void copyData(ModifierData *md, ModifierData *target)
{
	MirrorModifierData *mmd = (MirrorModifierData*) md;
	MirrorModifierData *tmmd = (MirrorModifierData*) target;

	tmmd->axis = mmd->axis;
	tmmd->flag = mmd->flag;
	tmmd->tolerance = mmd->tolerance;
	tmmd->mirror_ob = mmd->mirror_ob;;
}

static void foreachObjectLink(
						 ModifierData *md, Object *ob,
	  void (*walk)(void *userData, Object *ob, Object **obpoin),
		 void *userData)
{
	MirrorModifierData *mmd = (MirrorModifierData*) md;
	
	if (mmd->mirror_ob)
		walk(userData, ob, &mmd->mirror_ob);
}

static void updateDepgraph(ModifierData *md, DagForest *forest, struct Scene *UNUSED(scene),
					  Object *UNUSED(ob), DagNode *obNode)
{
	MirrorModifierData *mmd = (MirrorModifierData*) md;

	if(mmd->mirror_ob) {
		DagNode *latNode = dag_get_node(forest, mmd->mirror_ob);

		dag_add_relation(forest, latNode, obNode,
				 DAG_RL_DATA_DATA | DAG_RL_OB_DATA, "Mirror Modifier");
	}
}


/* Mirror */
#define VERT_NEW	1

void vertgroup_flip_name (char *name, int strip_number);
DerivedMesh *doMirrorOnAxis(MirrorModifierData *mmd,
		Object *ob,
		DerivedMesh *dm,
		int UNUSED(initFlags),
		int axis)
{
	float tolerance = mmd->tolerance;
	DerivedMesh *cddm, *origdm;
	bDeformGroup *def, *defb;
	bDeformGroup **vector_def = NULL;
	MVert *mv;
	MEdge *me;
	MLoop *ml;
	MPoly *mp;
	float mtx[4][4];
	int i, j, *vtargetmap = NULL;
	BLI_array_declare(vtargetmap);
	int vector_size=0, a, b, totshape;
	
	origdm = dm;
	if (!CDDM_Check(dm))
		dm = CDDM_copy(dm, 0);
	
	if (mmd->flag & MOD_MIR_VGROUP) {
		/* calculate the number of deformedGroups */
		for(vector_size = 0, def = ob->defbase.first; def;
			def = def->next, vector_size++);

		/* load the deformedGroups for fast access */
		vector_def =
			(bDeformGroup **)MEM_mallocN(sizeof(bDeformGroup*) * vector_size,
										 "group_index");
		for(a = 0, def = ob->defbase.first; def; def = def->next, a++) {
			vector_def[a] = def;
		}
	}

	if (mmd->mirror_ob) {
		float mtx2[4][4];

		invert_m4_m4(mtx2, mmd->mirror_ob->obmat);
		mul_m4_m4m4(mtx, ob->obmat, mtx2);
	} else {
		unit_m4(mtx);
	}
	
	cddm = CDDM_from_template(dm, dm->numVertData*2, dm->numEdgeData*2, 0, dm->numLoopData*2, dm->numPolyData*2);
	
	/*copy customdata to original geometry*/
	CustomData_copy_data(&dm->vertData, &cddm->vertData, 0, 0, dm->numVertData);
	CustomData_copy_data(&dm->edgeData, &cddm->edgeData, 0, 0, dm->numEdgeData);
	CustomData_copy_data(&dm->loopData, &cddm->loopData, 0, 0, dm->numLoopData);
	CustomData_copy_data(&dm->polyData, &cddm->polyData, 0, 0, dm->numPolyData);

	/*copy customdata to new geometry*/
	CustomData_copy_data(&dm->vertData, &cddm->vertData, 0, dm->numVertData, dm->numVertData);
	CustomData_copy_data(&dm->edgeData, &cddm->edgeData, 0, dm->numEdgeData, dm->numEdgeData);
	CustomData_copy_data(&dm->polyData, &cddm->polyData, 0, dm->numPolyData, dm->numPolyData);
	
	/*mirror vertex coordinates*/
	mv = CDDM_get_verts(cddm) + dm->numVertData;
	for (i=0; i<dm->numVertData; i++, mv++) {
		mv->co[axis] = -mv->co[axis];
		if (fabs(mv->co[axis]) < tolerance) {
			BLI_array_append(vtargetmap, i+dm->numVertData);
		} else BLI_array_append(vtargetmap, -1);
	}
	
	/*handle shape keys*/
	totshape = CustomData_number_of_layers(&cddm->vertData, CD_SHAPEKEY);
	for (a=0; a<totshape; a++) {
		float (*cos)[3] = CustomData_get_layer_n(&cddm->vertData, CD_SHAPEKEY, a);
		for (i=dm->numVertData; i<cddm->numVertData; i++) {
			cos[i][axis] = -cos[i][axis];
		}
	}
	
	for (i=0; i<dm->numVertData; i++) {
		BLI_array_append(vtargetmap, -1);
	}
	
	/*adjust mirrored edge vertex indices*/
	me = CDDM_get_edges(cddm) + dm->numEdgeData;
	for (i=0; i<dm->numEdgeData; i++, me++) {
		me->v1 += dm->numVertData;
		me->v2 += dm->numVertData;
	}
	
	/*adjust mirrored poly loopstart indices, and reverse loop order (normals)*/	
	mp = CDDM_get_polys(cddm) + dm->numPolyData;
	ml = CDDM_get_loops(cddm);
	for (i=0; i<dm->numPolyData; i++, mp++) {
		MLoop *ml2;
		int e;
		
		for (j=0; j<mp->totloop; j++) {
			CustomData_copy_data(&dm->loopData, &cddm->loopData, mp->loopstart+j,
								 mp->loopstart+dm->numLoopData+mp->totloop-j-1, 1);
		}
		
		ml2 = ml + mp->loopstart + dm->numLoopData;
		e = ml2[0].e;
		for (j=0; j<mp->totloop-1; j++) {
			ml2[j].e = ml2[j+1].e;
		}
		ml2[mp->totloop-1].e = e;
		
		mp->loopstart += dm->numLoopData;
	}

	/*adjust mirrored loop vertex and edge indices*/	
	ml = CDDM_get_loops(cddm) + dm->numLoopData;
	for (i=0; i<dm->numLoopData; i++, ml++) {
		ml->v += dm->numVertData;
		ml->e += dm->numEdgeData;
	}

	CDDM_recalc_tesselation(cddm, 1);
	
	/*handle vgroup stuff*/
	if ((mmd->flag & MOD_MIR_VGROUP) && CustomData_has_layer(&cddm->vertData, CD_MDEFORMVERT)) {
		MDeformVert *dvert = CustomData_get_layer(&cddm->vertData, CD_MDEFORMVERT);
		
		for (i=0; i<dm->numVertData; i++, dvert++) {
			for(j = 0; j < dvert->totweight; ++j) {
				char tmpname[32];

				if(dvert->dw[j].def_nr < 0 ||
				   dvert->dw[j].def_nr >= vector_size)
					continue;

				def = vector_def[dvert->dw[j].def_nr];
				strcpy(tmpname, def->name);
				vertgroup_flip_name(tmpname,0);

				for(b = 0, defb = ob->defbase.first; defb;
					defb = defb->next, b++)
				{
					if(!strcmp(defb->name, tmpname))
					{
						dvert->dw[j].def_nr = b;
						break;
					}
				}
			}
		}
	}
	
	if (!(mmd->flag & MOD_MIR_NO_MERGE))
		cddm = CDDM_merge_verts(cddm, vtargetmap);
	
	BLI_array_free(vtargetmap);
	
	if (vector_def) MEM_freeN(vector_def);
	
	if (dm != origdm) {
		dm->needsFree = 1;
		dm->release(dm);
	}
	
	return cddm;
}

static DerivedMesh *mirrorModifier__doMirror(MirrorModifierData *mmd,
						Object *ob, DerivedMesh *dm,
						int initFlags)
{
	DerivedMesh *result = dm;

	/* check which axes have been toggled and mirror accordingly */
	if(mmd->flag & MOD_MIR_AXIS_X) {
		result = doMirrorOnAxis(mmd, ob, result, initFlags, 0);
	}
	if(mmd->flag & MOD_MIR_AXIS_Y) {
		DerivedMesh *tmp = result;
		result = doMirrorOnAxis(mmd, ob, result, initFlags, 1);
		if(tmp != dm) tmp->release(tmp); /* free intermediate results */
	}
	if(mmd->flag & MOD_MIR_AXIS_Z) {
		DerivedMesh *tmp = result;
		result = doMirrorOnAxis(mmd, ob, result, initFlags, 2);
		if(tmp != dm) tmp->release(tmp); /* free intermediate results */
	}

	return result;
}

static DerivedMesh *applyModifier(
		ModifierData *md, Object *ob, DerivedMesh *derivedData,
  int UNUSED(useRenderParams), int UNUSED(isFinalCalc))
{
	DerivedMesh *result;
	MirrorModifierData *mmd = (MirrorModifierData*) md;

	result = mirrorModifier__doMirror(mmd, ob, derivedData, 0);

	if(result != derivedData)
		CDDM_calc_normals(result);
	
	return result;
}

static DerivedMesh *applyModifierEM(
		ModifierData *md, Object *ob, struct BMEditMesh *UNUSED(editData),
  DerivedMesh *derivedData)
{
	return applyModifier(md, ob, derivedData, 0, 1);
}


ModifierTypeInfo modifierType_Mirror = {
	/* name */              "Mirror",
	/* structName */        "MirrorModifierData",
	/* structSize */        sizeof(MirrorModifierData),
	/* type */              eModifierTypeType_Constructive,
	/* flags */             eModifierTypeFlag_AcceptsMesh
							| eModifierTypeFlag_SupportsMapping
							| eModifierTypeFlag_SupportsEditmode
							| eModifierTypeFlag_EnableInEditmode
							| eModifierTypeFlag_AcceptsCVs,

	/* copyData */          copyData,
	/* deformVerts */       NULL,
	/* deformMatrices */    NULL,
	/* deformVertsEM */     NULL,
	/* deformMatricesEM */  NULL,
	/* applyModifier */     applyModifier,
	/* applyModifierEM */   applyModifierEM,
	/* initData */          initData,
	/* requiredDataMask */  NULL,
	/* freeData */          NULL,
	/* isDisabled */        NULL,
	/* updateDepgraph */    updateDepgraph,
	/* dependsOnTime */     NULL,
	/* dependsOnNormals */	NULL,
	/* foreachObjectLink */ foreachObjectLink,
	/* foreachIDLink */     NULL,
};