Blender V2.61 - r43446

MOD_displace.c

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00001 /*
00002  * ***** BEGIN GPL LICENSE BLOCK *****
00003  *
00004  * This program is free software; you can redistribute it and/or
00005  * modify it under the terms of the GNU General Public License
00006  * as published by the Free Software Foundation; either version 2
00007  * of the License, or (at your option) any later version.
00008  *
00009  * This program is distributed in the hope that it will be useful,
00010  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012  * GNU General Public License for more details.
00013  *
00014  * You should have received a copy of the GNU General Public License
00015  * along with this program; if not, write to the Free Software  Foundation,
00016  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
00017  *
00018  * The Original Code is Copyright (C) 2005 by the Blender Foundation.
00019  * All rights reserved.
00020  *
00021  * Contributor(s): Daniel Dunbar
00022  *                 Ton Roosendaal,
00023  *                 Ben Batt,
00024  *                 Brecht Van Lommel,
00025  *                 Campbell Barton
00026  *
00027  * ***** END GPL LICENSE BLOCK *****
00028  *
00029  */
00030 
00036 #include "DNA_meshdata_types.h"
00037 #include "DNA_object_types.h"
00038 
00039 #include "BLI_math.h"
00040 #include "BLI_utildefines.h"
00041 #include "BLI_string.h"
00042 
00043 
00044 #include "BKE_cdderivedmesh.h"
00045 #include "BKE_modifier.h"
00046 #include "BKE_texture.h"
00047 #include "BKE_deform.h"
00048 
00049 #include "depsgraph_private.h"
00050 #include "MEM_guardedalloc.h"
00051 
00052 #include "MOD_util.h"
00053 
00054 #include "RE_shader_ext.h"
00055 
00056 
00057 /* Displace */
00058 
00059 static void initData(ModifierData *md)
00060 {
00061     DisplaceModifierData *dmd = (DisplaceModifierData*) md;
00062 
00063     dmd->texture = NULL;
00064     dmd->strength = 1;
00065     dmd->direction = MOD_DISP_DIR_NOR;
00066     dmd->midlevel = 0.5;
00067 }
00068 
00069 static void copyData(ModifierData *md, ModifierData *target)
00070 {
00071     DisplaceModifierData *dmd = (DisplaceModifierData*) md;
00072     DisplaceModifierData *tdmd = (DisplaceModifierData*) target;
00073 
00074     tdmd->texture = dmd->texture;
00075     tdmd->strength = dmd->strength;
00076     tdmd->direction = dmd->direction;
00077     BLI_strncpy(tdmd->defgrp_name, dmd->defgrp_name, sizeof(tdmd->defgrp_name));
00078     tdmd->midlevel = dmd->midlevel;
00079     tdmd->texmapping = dmd->texmapping;
00080     tdmd->map_object = dmd->map_object;
00081     BLI_strncpy(tdmd->uvlayer_name, dmd->uvlayer_name, sizeof(tdmd->uvlayer_name));
00082 }
00083 
00084 static CustomDataMask requiredDataMask(Object *UNUSED(ob), ModifierData *md)
00085 {
00086     DisplaceModifierData *dmd = (DisplaceModifierData *)md;
00087     CustomDataMask dataMask = 0;
00088 
00089     /* ask for vertexgroups if we need them */
00090     if(dmd->defgrp_name[0]) dataMask |= CD_MASK_MDEFORMVERT;
00091 
00092     /* ask for UV coordinates if we need them */
00093     if(dmd->texmapping == MOD_DISP_MAP_UV) dataMask |= CD_MASK_MTFACE;
00094 
00095     return dataMask;
00096 }
00097 
00098 static int dependsOnTime(ModifierData *md)
00099 {
00100     DisplaceModifierData *dmd = (DisplaceModifierData *)md;
00101 
00102     if(dmd->texture)
00103     {
00104         return BKE_texture_dependsOnTime(dmd->texture);
00105     }
00106     else
00107     {
00108         return 0;
00109     }
00110 }
00111 
00112 static int dependsOnNormals(ModifierData *md)
00113 {
00114     DisplaceModifierData *dmd = (DisplaceModifierData *)md;
00115     return (dmd->direction == MOD_DISP_DIR_NOR);
00116 }
00117 
00118 static void foreachObjectLink(ModifierData *md, Object *ob,
00119                            ObjectWalkFunc walk, void *userData)
00120 {
00121     DisplaceModifierData *dmd = (DisplaceModifierData*) md;
00122 
00123     walk(userData, ob, &dmd->map_object);
00124 }
00125 
00126 static void foreachIDLink(ModifierData *md, Object *ob,
00127                        IDWalkFunc walk, void *userData)
00128 {
00129     DisplaceModifierData *dmd = (DisplaceModifierData*) md;
00130 
00131     walk(userData, ob, (ID **)&dmd->texture);
00132 
00133     foreachObjectLink(md, ob, (ObjectWalkFunc)walk, userData);
00134 }
00135 
00136 static void foreachTexLink(ModifierData *md, Object *ob,
00137                        TexWalkFunc walk, void *userData)
00138 {
00139     walk(userData, ob, md, "texture");
00140 }
00141 
00142 static int isDisabled(ModifierData *md, int UNUSED(useRenderParams))
00143 {
00144     DisplaceModifierData *dmd = (DisplaceModifierData*) md;
00145 
00146     return (!dmd->texture || dmd->strength == 0.0f);
00147 }
00148 
00149 static void updateDepgraph(ModifierData *md, DagForest *forest,
00150                         struct Scene *UNUSED(scene),
00151                         Object *UNUSED(ob),
00152                         DagNode *obNode)
00153 {
00154     DisplaceModifierData *dmd = (DisplaceModifierData*) md;
00155 
00156     if(dmd->map_object && dmd->texmapping == MOD_DISP_MAP_OBJECT) {
00157         DagNode *curNode = dag_get_node(forest, dmd->map_object);
00158 
00159         dag_add_relation(forest, curNode, obNode,
00160                          DAG_RL_DATA_DATA | DAG_RL_OB_DATA, "Displace Modifier");
00161     }
00162     
00163 
00164     if(dmd->texmapping == MOD_DISP_MAP_GLOBAL)
00165         dag_add_relation(forest, obNode, obNode,
00166                          DAG_RL_DATA_DATA | DAG_RL_OB_DATA, "Displace Modifier");
00167     
00168 }
00169 
00170 /* dm must be a CDDerivedMesh */
00171 static void displaceModifier_do(
00172                 DisplaceModifierData *dmd, Object *ob,
00173     DerivedMesh *dm, float (*vertexCos)[3], int numVerts)
00174 {
00175     int i;
00176     MVert *mvert;
00177     MDeformVert *dvert;
00178     int defgrp_index;
00179     float (*tex_co)[3];
00180     float weight= 1.0f; /* init value unused but some compilers may complain */
00181 
00182     if(!dmd->texture) return;
00183     if(dmd->strength == 0.0f) return;
00184 
00185     mvert = CDDM_get_verts(dm);
00186     modifier_get_vgroup(ob, dm, dmd->defgrp_name, &dvert, &defgrp_index);
00187 
00188     tex_co = MEM_callocN(sizeof(*tex_co) * numVerts,
00189                  "displaceModifier_do tex_co");
00190     get_texture_coords((MappingInfoModifierData *)dmd, ob, dm, vertexCos, tex_co, numVerts);
00191 
00192     for(i = 0; i < numVerts; ++i) {
00193         TexResult texres;
00194         float delta = 0, strength = dmd->strength;
00195 
00196         if(dvert) {
00197             weight= defvert_find_weight(dvert + i, defgrp_index);
00198             if(weight == 0.0f) continue;
00199         }
00200 
00201         texres.nor = NULL;
00202         get_texture_value(dmd->texture, tex_co[i], &texres);
00203 
00204         delta = texres.tin - dmd->midlevel;
00205 
00206         if(dvert) strength *= weight;
00207 
00208         delta *= strength;
00209         CLAMP(delta, -10000, 10000);
00210 
00211         switch(dmd->direction) {
00212             case MOD_DISP_DIR_X:
00213                 vertexCos[i][0] += delta;
00214                 break;
00215             case MOD_DISP_DIR_Y:
00216                 vertexCos[i][1] += delta;
00217                 break;
00218             case MOD_DISP_DIR_Z:
00219                 vertexCos[i][2] += delta;
00220                 break;
00221             case MOD_DISP_DIR_RGB_XYZ:
00222                 vertexCos[i][0] += (texres.tr - dmd->midlevel) * strength;
00223                 vertexCos[i][1] += (texres.tg - dmd->midlevel) * strength;
00224                 vertexCos[i][2] += (texres.tb - dmd->midlevel) * strength;
00225                 break;
00226             case MOD_DISP_DIR_NOR:
00227                 vertexCos[i][0] += delta * (mvert[i].no[0] / 32767.0f);
00228                 vertexCos[i][1] += delta * (mvert[i].no[1] / 32767.0f);
00229                 vertexCos[i][2] += delta * (mvert[i].no[2] / 32767.0f);
00230                 break;
00231         }
00232     }
00233 
00234     MEM_freeN(tex_co);
00235 }
00236 
00237 static void deformVerts(ModifierData *md, Object *ob,
00238                         DerivedMesh *derivedData,
00239                         float (*vertexCos)[3],
00240                         int numVerts,
00241                         int UNUSED(useRenderParams),
00242                         int UNUSED(isFinalCalc))
00243 {
00244     DerivedMesh *dm= get_cddm(ob, NULL, derivedData, vertexCos);
00245 
00246     displaceModifier_do((DisplaceModifierData *)md, ob, dm,
00247                         vertexCos, numVerts);
00248 
00249     if(dm != derivedData)
00250         dm->release(dm);
00251 }
00252 
00253 static void deformVertsEM(
00254                        ModifierData *md, Object *ob, struct EditMesh *editData,
00255     DerivedMesh *derivedData, float (*vertexCos)[3], int numVerts)
00256 {
00257     DerivedMesh *dm= get_cddm(ob, editData, derivedData, vertexCos);
00258 
00259     displaceModifier_do((DisplaceModifierData *)md, ob, dm,
00260                         vertexCos, numVerts);
00261 
00262     if(dm != derivedData)
00263         dm->release(dm);
00264 }
00265 
00266 
00267 ModifierTypeInfo modifierType_Displace = {
00268     /* name */              "Displace",
00269     /* structName */        "DisplaceModifierData",
00270     /* structSize */        sizeof(DisplaceModifierData),
00271     /* type */              eModifierTypeType_OnlyDeform,
00272     /* flags */             eModifierTypeFlag_AcceptsMesh
00273                             | eModifierTypeFlag_SupportsEditmode,
00274 
00275     /* copyData */          copyData,
00276     /* deformVerts */       deformVerts,
00277     /* deformMatrices */    NULL,
00278     /* deformVertsEM */     deformVertsEM,
00279     /* deformMatricesEM */  NULL,
00280     /* applyModifier */     NULL,
00281     /* applyModifierEM */   NULL,
00282     /* initData */          initData,
00283     /* requiredDataMask */  requiredDataMask,
00284     /* freeData */          NULL,
00285     /* isDisabled */        isDisabled,
00286     /* updateDepgraph */    updateDepgraph,
00287     /* dependsOnTime */     dependsOnTime,
00288     /* dependsOnNormals */  dependsOnNormals,
00289     /* foreachObjectLink */ foreachObjectLink,
00290     /* foreachIDLink */     foreachIDLink,
00291     /* foreachTexLink */    foreachTexLink,
00292 };