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annotate libs/assimp/BlenderModifier.cpp @ 1:e7ca128b8713

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looks nice :)
author John Tsiombikas <nuclear@member.fsf.org>
date Sun, 02 Feb 2014 00:35:22 +0200
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nuclear@0 1 /*
nuclear@0 2 Open Asset Import Library (assimp)
nuclear@0 3 ----------------------------------------------------------------------
nuclear@0 4
nuclear@0 5 Copyright (c) 2006-2012, assimp team
nuclear@0 6 All rights reserved.
nuclear@0 7
nuclear@0 8 Redistribution and use of this software in source and binary forms,
nuclear@0 9 with or without modification, are permitted provided that the
nuclear@0 10 following conditions are met:
nuclear@0 11
nuclear@0 12 * Redistributions of source code must retain the above
nuclear@0 13 copyright notice, this list of conditions and the
nuclear@0 14 following disclaimer.
nuclear@0 15
nuclear@0 16 * Redistributions in binary form must reproduce the above
nuclear@0 17 copyright notice, this list of conditions and the
nuclear@0 18 following disclaimer in the documentation and/or other
nuclear@0 19 materials provided with the distribution.
nuclear@0 20
nuclear@0 21 * Neither the name of the assimp team, nor the names of its
nuclear@0 22 contributors may be used to endorse or promote products
nuclear@0 23 derived from this software without specific prior
nuclear@0 24 written permission of the assimp team.
nuclear@0 25
nuclear@0 26 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
nuclear@0 27 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
nuclear@0 28 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
nuclear@0 29 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
nuclear@0 30 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
nuclear@0 31 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
nuclear@0 32 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
nuclear@0 33 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
nuclear@0 34 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
nuclear@0 35 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
nuclear@0 36 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
nuclear@0 37
nuclear@0 38 ----------------------------------------------------------------------
nuclear@0 39 */
nuclear@0 40
nuclear@0 41 /** @file BlenderModifier.cpp
nuclear@0 42 * @brief Implementation of some blender modifiers (i.e subdivision, mirror).
nuclear@0 43 */
nuclear@0 44 #include "AssimpPCH.h"
nuclear@0 45
nuclear@0 46 #ifndef ASSIMP_BUILD_NO_BLEND_IMPORTER
nuclear@0 47 #include "BlenderModifier.h"
nuclear@0 48 #include "SceneCombiner.h"
nuclear@0 49 #include "Subdivision.h"
nuclear@0 50
nuclear@0 51 #include <functional>
nuclear@0 52
nuclear@0 53 using namespace Assimp;
nuclear@0 54 using namespace Assimp::Blender;
nuclear@0 55
nuclear@0 56 template <typename T> BlenderModifier* god() {
nuclear@0 57 return new T();
nuclear@0 58 }
nuclear@0 59
nuclear@0 60 // add all available modifiers here
nuclear@0 61 typedef BlenderModifier* (*fpCreateModifier)();
nuclear@0 62 static const fpCreateModifier creators[] = {
nuclear@0 63 &god<BlenderModifier_Mirror>,
nuclear@0 64 &god<BlenderModifier_Subdivision>,
nuclear@0 65
nuclear@0 66 NULL // sentinel
nuclear@0 67 };
nuclear@0 68
nuclear@0 69 // ------------------------------------------------------------------------------------------------
nuclear@0 70 // just testing out some new macros to simplify logging
nuclear@0 71 #define ASSIMP_LOG_WARN_F(string,...)\
nuclear@0 72 DefaultLogger::get()->warn((Formatter::format(string),__VA_ARGS__))
nuclear@0 73
nuclear@0 74 #define ASSIMP_LOG_ERROR_F(string,...)\
nuclear@0 75 DefaultLogger::get()->error((Formatter::format(string),__VA_ARGS__))
nuclear@0 76
nuclear@0 77 #define ASSIMP_LOG_DEBUG_F(string,...)\
nuclear@0 78 DefaultLogger::get()->debug((Formatter::format(string),__VA_ARGS__))
nuclear@0 79
nuclear@0 80 #define ASSIMP_LOG_INFO_F(string,...)\
nuclear@0 81 DefaultLogger::get()->info((Formatter::format(string),__VA_ARGS__))
nuclear@0 82
nuclear@0 83
nuclear@0 84 #define ASSIMP_LOG_WARN(string)\
nuclear@0 85 DefaultLogger::get()->warn(string)
nuclear@0 86
nuclear@0 87 #define ASSIMP_LOG_ERROR(string)\
nuclear@0 88 DefaultLogger::get()->error(string)
nuclear@0 89
nuclear@0 90 #define ASSIMP_LOG_DEBUG(string)\
nuclear@0 91 DefaultLogger::get()->debug(string)
nuclear@0 92
nuclear@0 93 #define ASSIMP_LOG_INFO(string)\
nuclear@0 94 DefaultLogger::get()->info(string)
nuclear@0 95
nuclear@0 96
nuclear@0 97 // ------------------------------------------------------------------------------------------------
nuclear@0 98 struct SharedModifierData : ElemBase
nuclear@0 99 {
nuclear@0 100 ModifierData modifier;
nuclear@0 101 };
nuclear@0 102
nuclear@0 103 // ------------------------------------------------------------------------------------------------
nuclear@0 104 void BlenderModifierShowcase::ApplyModifiers(aiNode& out, ConversionData& conv_data, const Scene& in, const Object& orig_object )
nuclear@0 105 {
nuclear@0 106 size_t cnt = 0u, ful = 0u;
nuclear@0 107
nuclear@0 108 // NOTE: this cast is potentially unsafe by design, so we need to perform type checks before
nuclear@0 109 // we're allowed to dereference the pointers without risking to crash. We might still be
nuclear@0 110 // invoking UB btw - we're assuming that the ModifierData member of the respective modifier
nuclear@0 111 // structures is at offset sizeof(vftable) with no padding.
nuclear@0 112 const SharedModifierData* cur = boost::static_pointer_cast<const SharedModifierData> ( orig_object.modifiers.first.get() );
nuclear@0 113 for (; cur; cur = boost::static_pointer_cast<const SharedModifierData> ( cur->modifier.next.get() ), ++ful) {
nuclear@0 114 ai_assert(cur->dna_type);
nuclear@0 115
nuclear@0 116 const Structure* s = conv_data.db.dna.Get( cur->dna_type );
nuclear@0 117 if (!s) {
nuclear@0 118 ASSIMP_LOG_WARN_F("BlendModifier: could not resolve DNA name: ",cur->dna_type);
nuclear@0 119 continue;
nuclear@0 120 }
nuclear@0 121
nuclear@0 122 // this is a common trait of all XXXMirrorData structures in BlenderDNA
nuclear@0 123 const Field* f = s->Get("modifier");
nuclear@0 124 if (!f || f->offset != 0) {
nuclear@0 125 ASSIMP_LOG_WARN("BlendModifier: expected a `modifier` member at offset 0");
nuclear@0 126 continue;
nuclear@0 127 }
nuclear@0 128
nuclear@0 129 s = conv_data.db.dna.Get( f->type );
nuclear@0 130 if (!s || s->name != "ModifierData") {
nuclear@0 131 ASSIMP_LOG_WARN("BlendModifier: expected a ModifierData structure as first member");
nuclear@0 132 continue;
nuclear@0 133 }
nuclear@0 134
nuclear@0 135 // now, we can be sure that we should be fine to dereference *cur* as
nuclear@0 136 // ModifierData (with the above note).
nuclear@0 137 const ModifierData& dat = cur->modifier;
nuclear@0 138
nuclear@0 139 const fpCreateModifier* curgod = creators;
nuclear@0 140 std::vector< BlenderModifier* >::iterator curmod = cached_modifiers->begin(), endmod = cached_modifiers->end();
nuclear@0 141
nuclear@0 142 for (;*curgod;++curgod,++curmod) { // allocate modifiers on the fly
nuclear@0 143 if (curmod == endmod) {
nuclear@0 144 cached_modifiers->push_back((*curgod)());
nuclear@0 145
nuclear@0 146 endmod = cached_modifiers->end();
nuclear@0 147 curmod = endmod-1;
nuclear@0 148 }
nuclear@0 149
nuclear@0 150 BlenderModifier* const modifier = *curmod;
nuclear@0 151 if(modifier->IsActive(dat)) {
nuclear@0 152 modifier->DoIt(out,conv_data,*boost::static_pointer_cast<const ElemBase>(cur),in,orig_object);
nuclear@0 153 cnt++;
nuclear@0 154
nuclear@0 155 curgod = NULL;
nuclear@0 156 break;
nuclear@0 157 }
nuclear@0 158 }
nuclear@0 159 if (curgod) {
nuclear@0 160 ASSIMP_LOG_WARN_F("Couldn't find a handler for modifier: ",dat.name);
nuclear@0 161 }
nuclear@0 162 }
nuclear@0 163
nuclear@0 164 // Even though we managed to resolve some or all of the modifiers on this
nuclear@0 165 // object, we still can't say whether our modifier implementations were
nuclear@0 166 // able to fully do their job.
nuclear@0 167 if (ful) {
nuclear@0 168 ASSIMP_LOG_DEBUG_F("BlendModifier: found handlers for ",cnt," of ",ful," modifiers on `",orig_object.id.name,
nuclear@0 169 "`, check log messages above for errors");
nuclear@0 170 }
nuclear@0 171 }
nuclear@0 172
nuclear@0 173
nuclear@0 174
nuclear@0 175 // ------------------------------------------------------------------------------------------------
nuclear@0 176 bool BlenderModifier_Mirror :: IsActive (const ModifierData& modin)
nuclear@0 177 {
nuclear@0 178 return modin.type == ModifierData::eModifierType_Mirror;
nuclear@0 179 }
nuclear@0 180
nuclear@0 181 // ------------------------------------------------------------------------------------------------
nuclear@0 182 void BlenderModifier_Mirror :: DoIt(aiNode& out, ConversionData& conv_data, const ElemBase& orig_modifier,
nuclear@0 183 const Scene& /*in*/,
nuclear@0 184 const Object& orig_object )
nuclear@0 185 {
nuclear@0 186 // hijacking the ABI, see the big note in BlenderModifierShowcase::ApplyModifiers()
nuclear@0 187 const MirrorModifierData& mir = static_cast<const MirrorModifierData&>(orig_modifier);
nuclear@0 188 ai_assert(mir.modifier.type == ModifierData::eModifierType_Mirror);
nuclear@0 189
nuclear@0 190 conv_data.meshes->reserve(conv_data.meshes->size() + out.mNumMeshes);
nuclear@0 191
nuclear@0 192 // XXX not entirely correct, mirroring on two axes results in 4 distinct objects in blender ...
nuclear@0 193
nuclear@0 194 // take all input meshes and clone them
nuclear@0 195 for (unsigned int i = 0; i < out.mNumMeshes; ++i) {
nuclear@0 196 aiMesh* mesh;
nuclear@0 197 SceneCombiner::Copy(&mesh,conv_data.meshes[out.mMeshes[i]]);
nuclear@0 198
nuclear@0 199 const float xs = mir.flag & MirrorModifierData::Flags_AXIS_X ? -1.f : 1.f;
nuclear@0 200 const float ys = mir.flag & MirrorModifierData::Flags_AXIS_Y ? -1.f : 1.f;
nuclear@0 201 const float zs = mir.flag & MirrorModifierData::Flags_AXIS_Z ? -1.f : 1.f;
nuclear@0 202
nuclear@0 203 if (mir.mirror_ob) {
nuclear@0 204 const aiVector3D center( mir.mirror_ob->obmat[3][0],mir.mirror_ob->obmat[3][1],mir.mirror_ob->obmat[3][2] );
nuclear@0 205 for (unsigned int i = 0; i < mesh->mNumVertices; ++i) {
nuclear@0 206 aiVector3D& v = mesh->mVertices[i];
nuclear@0 207
nuclear@0 208 v.x = center.x + xs*(center.x - v.x);
nuclear@0 209 v.y = center.y + ys*(center.y - v.y);
nuclear@0 210 v.z = center.z + zs*(center.z - v.z);
nuclear@0 211 }
nuclear@0 212 }
nuclear@0 213 else {
nuclear@0 214 for (unsigned int i = 0; i < mesh->mNumVertices; ++i) {
nuclear@0 215 aiVector3D& v = mesh->mVertices[i];
nuclear@0 216 v.x *= xs;v.y *= ys;v.z *= zs;
nuclear@0 217 }
nuclear@0 218 }
nuclear@0 219
nuclear@0 220 if (mesh->mNormals) {
nuclear@0 221 for (unsigned int i = 0; i < mesh->mNumVertices; ++i) {
nuclear@0 222 aiVector3D& v = mesh->mNormals[i];
nuclear@0 223 v.x *= xs;v.y *= ys;v.z *= zs;
nuclear@0 224 }
nuclear@0 225 }
nuclear@0 226
nuclear@0 227 if (mesh->mTangents) {
nuclear@0 228 for (unsigned int i = 0; i < mesh->mNumVertices; ++i) {
nuclear@0 229 aiVector3D& v = mesh->mTangents[i];
nuclear@0 230 v.x *= xs;v.y *= ys;v.z *= zs;
nuclear@0 231 }
nuclear@0 232 }
nuclear@0 233
nuclear@0 234 if (mesh->mBitangents) {
nuclear@0 235 for (unsigned int i = 0; i < mesh->mNumVertices; ++i) {
nuclear@0 236 aiVector3D& v = mesh->mBitangents[i];
nuclear@0 237 v.x *= xs;v.y *= ys;v.z *= zs;
nuclear@0 238 }
nuclear@0 239 }
nuclear@0 240
nuclear@0 241 const float us = mir.flag & MirrorModifierData::Flags_MIRROR_U ? -1.f : 1.f;
nuclear@0 242 const float vs = mir.flag & MirrorModifierData::Flags_MIRROR_V ? -1.f : 1.f;
nuclear@0 243
nuclear@0 244 for (unsigned int n = 0; mesh->HasTextureCoords(n); ++n) {
nuclear@0 245 for (unsigned int i = 0; i < mesh->mNumVertices; ++i) {
nuclear@0 246 aiVector3D& v = mesh->mTextureCoords[n][i];
nuclear@0 247 v.x *= us;v.y *= vs;
nuclear@0 248 }
nuclear@0 249 }
nuclear@0 250
nuclear@0 251 conv_data.meshes->push_back(mesh);
nuclear@0 252 }
nuclear@0 253 unsigned int* nind = new unsigned int[out.mNumMeshes*2];
nuclear@0 254
nuclear@0 255 std::copy(out.mMeshes,out.mMeshes+out.mNumMeshes,nind);
nuclear@0 256 std::transform(out.mMeshes,out.mMeshes+out.mNumMeshes,nind+out.mNumMeshes,
nuclear@0 257 std::bind1st(std::plus< unsigned int >(),out.mNumMeshes));
nuclear@0 258
nuclear@0 259 delete[] out.mMeshes;
nuclear@0 260 out.mMeshes = nind;
nuclear@0 261 out.mNumMeshes *= 2;
nuclear@0 262
nuclear@0 263 ASSIMP_LOG_INFO_F("BlendModifier: Applied the `Mirror` modifier to `",
nuclear@0 264 orig_object.id.name,"`");
nuclear@0 265 }
nuclear@0 266
nuclear@0 267
nuclear@0 268
nuclear@0 269
nuclear@0 270 // ------------------------------------------------------------------------------------------------
nuclear@0 271 bool BlenderModifier_Subdivision :: IsActive (const ModifierData& modin)
nuclear@0 272 {
nuclear@0 273 return modin.type == ModifierData::eModifierType_Subsurf;
nuclear@0 274 }
nuclear@0 275
nuclear@0 276 // ------------------------------------------------------------------------------------------------
nuclear@0 277 void BlenderModifier_Subdivision :: DoIt(aiNode& out, ConversionData& conv_data, const ElemBase& orig_modifier,
nuclear@0 278 const Scene& /*in*/,
nuclear@0 279 const Object& orig_object )
nuclear@0 280 {
nuclear@0 281 // hijacking the ABI, see the big note in BlenderModifierShowcase::ApplyModifiers()
nuclear@0 282 const SubsurfModifierData& mir = static_cast<const SubsurfModifierData&>(orig_modifier);
nuclear@0 283 ai_assert(mir.modifier.type == ModifierData::eModifierType_Subsurf);
nuclear@0 284
nuclear@0 285 Subdivider::Algorithm algo;
nuclear@0 286 switch (mir.subdivType)
nuclear@0 287 {
nuclear@0 288 case SubsurfModifierData::TYPE_CatmullClarke:
nuclear@0 289 algo = Subdivider::CATMULL_CLARKE;
nuclear@0 290 break;
nuclear@0 291
nuclear@0 292 case SubsurfModifierData::TYPE_Simple:
nuclear@0 293 ASSIMP_LOG_WARN("BlendModifier: The `SIMPLE` subdivision algorithm is not currently implemented, using Catmull-Clarke");
nuclear@0 294 algo = Subdivider::CATMULL_CLARKE;
nuclear@0 295 break;
nuclear@0 296
nuclear@0 297 default:
nuclear@0 298 ASSIMP_LOG_WARN_F("BlendModifier: Unrecognized subdivision algorithm: ",mir.subdivType);
nuclear@0 299 return;
nuclear@0 300 };
nuclear@0 301
nuclear@0 302 boost::scoped_ptr<Subdivider> subd(Subdivider::Create(algo));
nuclear@0 303 ai_assert(subd);
nuclear@0 304
nuclear@0 305 aiMesh** const meshes = &conv_data.meshes[conv_data.meshes->size() - out.mNumMeshes];
nuclear@0 306 boost::scoped_array<aiMesh*> tempmeshes(new aiMesh*[out.mNumMeshes]());
nuclear@0 307
nuclear@0 308 subd->Subdivide(meshes,out.mNumMeshes,tempmeshes.get(),std::max( mir.renderLevels, mir.levels ),true);
nuclear@0 309 std::copy(tempmeshes.get(),tempmeshes.get()+out.mNumMeshes,meshes);
nuclear@0 310
nuclear@0 311 ASSIMP_LOG_INFO_F("BlendModifier: Applied the `Subdivision` modifier to `",
nuclear@0 312 orig_object.id.name,"`");
nuclear@0 313 }
nuclear@0 314
nuclear@0 315 #endif