diff options
Diffstat (limited to 'source/blender/modifiers/intern/MOD_displace.c')
| -rw-r--r-- | source/blender/modifiers/intern/MOD_displace.c | 354 |
1 files changed, 354 insertions, 0 deletions
diff --git a/source/blender/modifiers/intern/MOD_displace.c b/source/blender/modifiers/intern/MOD_displace.c new file mode 100644 index 00000000000..29ace805543 --- /dev/null +++ b/source/blender/modifiers/intern/MOD_displace.c @@ -0,0 +1,354 @@ +/* +* $Id$ +* +* ***** 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 "BKE_cdderivedmesh.h" +#include "BKE_modifier.h" +#include "BKE_texture.h" +#include "BKE_deform.h" + +#include "depsgraph_private.h" +#include "MEM_guardedalloc.h" + +#include "MOD_util.h" + +#include "RE_shader_ext.h" + + +/* Displace */ + +static void initData(ModifierData *md) +{ + DisplaceModifierData *dmd = (DisplaceModifierData*) md; + + dmd->texture = NULL; + dmd->strength = 1; + dmd->direction = MOD_DISP_DIR_NOR; + dmd->midlevel = 0.5; +} + +static void copyData(ModifierData *md, ModifierData *target) +{ + DisplaceModifierData *dmd = (DisplaceModifierData*) md; + DisplaceModifierData *tdmd = (DisplaceModifierData*) target; + + tdmd->texture = dmd->texture; + tdmd->strength = dmd->strength; + tdmd->direction = dmd->direction; + strncpy(tdmd->defgrp_name, dmd->defgrp_name, 32); + tdmd->midlevel = dmd->midlevel; + tdmd->texmapping = dmd->texmapping; + tdmd->map_object = dmd->map_object; + strncpy(tdmd->uvlayer_name, dmd->uvlayer_name, 32); +} + +static CustomDataMask requiredDataMask(Object *ob, ModifierData *md) +{ + DisplaceModifierData *dmd = (DisplaceModifierData *)md; + CustomDataMask dataMask = 0; + + /* ask for vertexgroups if we need them */ + if(dmd->defgrp_name[0]) dataMask |= (1 << CD_MDEFORMVERT); + + /* ask for UV coordinates if we need them */ + if(dmd->texmapping == MOD_DISP_MAP_UV) dataMask |= (1 << CD_MTFACE); + + return dataMask; +} + +static int dependsOnTime(ModifierData *md) +{ + DisplaceModifierData *dmd = (DisplaceModifierData *)md; + + if(dmd->texture) + { + return BKE_texture_dependsOnTime(dmd->texture); + } + else + { + return 0; + } +} + +static void foreachObjectLink(ModifierData *md, Object *ob, + ObjectWalkFunc walk, void *userData) +{ + DisplaceModifierData *dmd = (DisplaceModifierData*) md; + + walk(userData, ob, &dmd->map_object); +} + +static void foreachIDLink(ModifierData *md, Object *ob, + IDWalkFunc walk, void *userData) +{ + DisplaceModifierData *dmd = (DisplaceModifierData*) md; + + walk(userData, ob, (ID **)&dmd->texture); + + foreachObjectLink(md, ob, (ObjectWalkFunc)walk, userData); +} + +static int isDisabled(ModifierData *md, int useRenderParams) +{ + DisplaceModifierData *dmd = (DisplaceModifierData*) md; + + return (!dmd->texture || dmd->strength == 0.0f); +} + +static void updateDepgraph( + ModifierData *md, DagForest *forest, struct Scene *scene, + Object *ob, DagNode *obNode) +{ + DisplaceModifierData *dmd = (DisplaceModifierData*) md; + + if(dmd->map_object) { + DagNode *curNode = dag_get_node(forest, dmd->map_object); + + dag_add_relation(forest, curNode, obNode, + DAG_RL_DATA_DATA | DAG_RL_OB_DATA, "Displace Modifier"); + } +} + +static void get_texture_coords(DisplaceModifierData *dmd, Object *ob, + DerivedMesh *dm, + float (*co)[3], float (*texco)[3], + int numVerts) +{ + int i; + int texmapping = dmd->texmapping; + float mapob_imat[4][4]; + + if(texmapping == MOD_DISP_MAP_OBJECT) { + if(dmd->map_object) + invert_m4_m4(mapob_imat, dmd->map_object->obmat); + else /* if there is no map object, default to local */ + texmapping = MOD_DISP_MAP_LOCAL; + } + + /* UVs need special handling, since they come from faces */ + if(texmapping == MOD_DISP_MAP_UV) { + if(CustomData_has_layer(&dm->faceData, CD_MTFACE)) { + MFace *mface = dm->getFaceArray(dm); + MFace *mf; + char *done = MEM_callocN(sizeof(*done) * numVerts, + "get_texture_coords done"); + int numFaces = dm->getNumFaces(dm); + char uvname[32]; + MTFace *tf; + + validate_layer_name(&dm->faceData, CD_MTFACE, dmd->uvlayer_name, uvname); + tf = CustomData_get_layer_named(&dm->faceData, CD_MTFACE, uvname); + + /* verts are given the UV from the first face that uses them */ + for(i = 0, mf = mface; i < numFaces; ++i, ++mf, ++tf) { + if(!done[mf->v1]) { + texco[mf->v1][0] = tf->uv[0][0]; + texco[mf->v1][1] = tf->uv[0][1]; + texco[mf->v1][2] = 0; + done[mf->v1] = 1; + } + if(!done[mf->v2]) { + texco[mf->v2][0] = tf->uv[1][0]; + texco[mf->v2][1] = tf->uv[1][1]; + texco[mf->v2][2] = 0; + done[mf->v2] = 1; + } + if(!done[mf->v3]) { + texco[mf->v3][0] = tf->uv[2][0]; + texco[mf->v3][1] = tf->uv[2][1]; + texco[mf->v3][2] = 0; + done[mf->v3] = 1; + } + if(!done[mf->v4]) { + texco[mf->v4][0] = tf->uv[3][0]; + texco[mf->v4][1] = tf->uv[3][1]; + texco[mf->v4][2] = 0; + done[mf->v4] = 1; + } + } + + /* remap UVs from [0, 1] to [-1, 1] */ + for(i = 0; i < numVerts; ++i) { + texco[i][0] = texco[i][0] * 2 - 1; + texco[i][1] = texco[i][1] * 2 - 1; + } + + MEM_freeN(done); + return; + } else /* if there are no UVs, default to local */ + texmapping = MOD_DISP_MAP_LOCAL; + } + + for(i = 0; i < numVerts; ++i, ++co, ++texco) { + switch(texmapping) { + case MOD_DISP_MAP_LOCAL: + copy_v3_v3(*texco, *co); + break; + case MOD_DISP_MAP_GLOBAL: + mul_v3_m4v3(*texco, ob->obmat, *co); + break; + case MOD_DISP_MAP_OBJECT: + mul_v3_m4v3(*texco, ob->obmat, *co); + mul_m4_v3(mapob_imat, *texco); + break; + } + } +} + +/* dm must be a CDDerivedMesh */ +static void displaceModifier_do( + DisplaceModifierData *dmd, Object *ob, + DerivedMesh *dm, float (*vertexCos)[3], int numVerts) +{ + int i; + MVert *mvert; + MDeformVert *dvert = NULL; + int defgrp_index; + float (*tex_co)[3]; + + if(!dmd->texture) return; + + defgrp_index = defgroup_name_index(ob, dmd->defgrp_name); + + mvert = CDDM_get_verts(dm); + if(defgrp_index >= 0) + dvert = dm->getVertDataArray(dm, CD_MDEFORMVERT); + + tex_co = MEM_callocN(sizeof(*tex_co) * numVerts, + "displaceModifier_do tex_co"); + get_texture_coords(dmd, ob, dm, vertexCos, tex_co, numVerts); + + for(i = 0; i < numVerts; ++i) { + TexResult texres; + float delta = 0, strength = dmd->strength; + MDeformWeight *def_weight = NULL; + + if(dvert) { + int j; + for(j = 0; j < dvert[i].totweight; ++j) { + if(dvert[i].dw[j].def_nr == defgrp_index) { + def_weight = &dvert[i].dw[j]; + break; + } + } + if(!def_weight) continue; + } + + texres.nor = NULL; + get_texture_value(dmd->texture, tex_co[i], &texres); + + delta = texres.tin - dmd->midlevel; + + if(def_weight) strength *= def_weight->weight; + + delta *= strength; + + switch(dmd->direction) { + case MOD_DISP_DIR_X: + vertexCos[i][0] += delta; + break; + case MOD_DISP_DIR_Y: + vertexCos[i][1] += delta; + break; + case MOD_DISP_DIR_Z: + vertexCos[i][2] += delta; + break; + case MOD_DISP_DIR_RGB_XYZ: + vertexCos[i][0] += (texres.tr - dmd->midlevel) * strength; + vertexCos[i][1] += (texres.tg - dmd->midlevel) * strength; + vertexCos[i][2] += (texres.tb - dmd->midlevel) * strength; + break; + case MOD_DISP_DIR_NOR: + vertexCos[i][0] += delta * mvert[i].no[0] / 32767.0f; + vertexCos[i][1] += delta * mvert[i].no[1] / 32767.0f; + vertexCos[i][2] += delta * mvert[i].no[2] / 32767.0f; + break; + } + } + + MEM_freeN(tex_co); +} + +static void deformVerts( + ModifierData *md, Object *ob, DerivedMesh *derivedData, + float (*vertexCos)[3], int numVerts, int useRenderParams, int isFinalCalc) +{ + DerivedMesh *dm= get_cddm(md->scene, ob, NULL, derivedData, vertexCos); + + displaceModifier_do((DisplaceModifierData *)md, ob, dm, + vertexCos, numVerts); + + if(dm != derivedData) + dm->release(dm); +} + +static void deformVertsEM( + ModifierData *md, Object *ob, struct EditMesh *editData, + DerivedMesh *derivedData, float (*vertexCos)[3], int numVerts) +{ + DerivedMesh *dm= get_cddm(md->scene, ob, editData, derivedData, vertexCos); + + displaceModifier_do((DisplaceModifierData *)md, ob, dm, + vertexCos, numVerts); + + if(dm != derivedData) + dm->release(dm); +} + + +ModifierTypeInfo modifierType_Displace = { + /* name */ "Displace", + /* structName */ "DisplaceModifierData", + /* structSize */ sizeof(DisplaceModifierData), + /* type */ eModifierTypeType_OnlyDeform, + /* flags */ eModifierTypeFlag_AcceptsMesh + | eModifierTypeFlag_SupportsEditmode, + + /* copyData */ copyData, + /* deformVerts */ deformVerts, + /* deformVertsEM */ deformVertsEM, + /* deformMatricesEM */ 0, + /* applyModifier */ 0, + /* applyModifierEM */ 0, + /* initData */ initData, + /* requiredDataMask */ requiredDataMask, + /* freeData */ 0, + /* isDisabled */ isDisabled, + /* updateDepgraph */ updateDepgraph, + /* dependsOnTime */ dependsOnTime, + /* foreachObjectLink */ foreachObjectLink, + /* foreachIDLink */ foreachIDLink, +}; 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