1 | /* |
---|
2 | ----------------------------------------------------------------------------- |
---|
3 | This source file is part of OGRE |
---|
4 | (Object-oriented Graphics Rendering Engine) |
---|
5 | For the latest info, see http://www.ogre3d.org/ |
---|
6 | |
---|
7 | Copyright (c) 2000-2006 Torus Knot Software Ltd |
---|
8 | Also see acknowledgements in Readme.html |
---|
9 | |
---|
10 | This program is free software; you can redistribute it and/or modify it under |
---|
11 | the terms of the GNU Lesser General Public License as published by the Free Software |
---|
12 | Foundation; either version 2 of the License, or (at your option) any later |
---|
13 | version. |
---|
14 | |
---|
15 | This program is distributed in the hope that it will be useful, but WITHOUT |
---|
16 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
---|
17 | FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. |
---|
18 | |
---|
19 | You should have received a copy of the GNU Lesser General Public License along with |
---|
20 | this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
---|
21 | Place - Suite 330, Boston, MA 02111-1307, USA, or go to |
---|
22 | http://www.gnu.org/copyleft/lesser.txt. |
---|
23 | |
---|
24 | You may alternatively use this source under the terms of a specific version of |
---|
25 | the OGRE Unrestricted License provided you have obtained such a license from |
---|
26 | Torus Knot Software Ltd. |
---|
27 | ----------------------------------------------------------------------------- |
---|
28 | */ |
---|
29 | #include "OgreStableHeaders.h" |
---|
30 | #include "OgreSubMesh.h" |
---|
31 | |
---|
32 | #include "OgreMesh.h" |
---|
33 | #include "OgreException.h" |
---|
34 | #include "OgreMeshManager.h" |
---|
35 | #include "OgreMaterialManager.h" |
---|
36 | #include "OgreStringConverter.h" |
---|
37 | |
---|
38 | namespace Ogre { |
---|
39 | //----------------------------------------------------------------------- |
---|
40 | SubMesh::SubMesh() |
---|
41 | : useSharedVertices(true) |
---|
42 | , operationType(RenderOperation::OT_TRIANGLE_LIST) |
---|
43 | , vertexData(0) |
---|
44 | , mMatInitialised(false) |
---|
45 | , mBoneAssignmentsOutOfDate(false) |
---|
46 | , mVertexAnimationType(VAT_NONE) |
---|
47 | { |
---|
48 | indexData = new IndexData(); |
---|
49 | } |
---|
50 | //----------------------------------------------------------------------- |
---|
51 | SubMesh::~SubMesh() |
---|
52 | { |
---|
53 | delete vertexData; |
---|
54 | delete indexData; |
---|
55 | |
---|
56 | removeLodLevels(); |
---|
57 | } |
---|
58 | |
---|
59 | //----------------------------------------------------------------------- |
---|
60 | void SubMesh::setMaterialName(const String& name) |
---|
61 | { |
---|
62 | mMaterialName = name; |
---|
63 | mMatInitialised = true; |
---|
64 | } |
---|
65 | //----------------------------------------------------------------------- |
---|
66 | const String& SubMesh::getMaterialName() const |
---|
67 | { |
---|
68 | return mMaterialName; |
---|
69 | } |
---|
70 | //----------------------------------------------------------------------- |
---|
71 | bool SubMesh::isMatInitialised(void) const |
---|
72 | { |
---|
73 | return mMatInitialised; |
---|
74 | |
---|
75 | } |
---|
76 | //----------------------------------------------------------------------- |
---|
77 | void SubMesh::_getRenderOperation(RenderOperation& ro, ushort lodIndex) |
---|
78 | { |
---|
79 | |
---|
80 | // SubMeshes always use indexes |
---|
81 | ro.useIndexes = true; |
---|
82 | if (lodIndex > 0 && static_cast< size_t >( lodIndex - 1 ) < mLodFaceList.size()) |
---|
83 | { |
---|
84 | // lodIndex - 1 because we don't store full detail version in mLodFaceList |
---|
85 | ro.indexData = mLodFaceList[lodIndex-1]; |
---|
86 | } |
---|
87 | else |
---|
88 | { |
---|
89 | ro.indexData = indexData; |
---|
90 | } |
---|
91 | ro.operationType = operationType; |
---|
92 | ro.vertexData = useSharedVertices? parent->sharedVertexData : vertexData; |
---|
93 | |
---|
94 | } |
---|
95 | //----------------------------------------------------------------------- |
---|
96 | void SubMesh::addBoneAssignment(const VertexBoneAssignment& vertBoneAssign) |
---|
97 | { |
---|
98 | if (useSharedVertices) |
---|
99 | { |
---|
100 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "This SubMesh uses shared geometry, you " |
---|
101 | "must assign bones to the Mesh, not the SubMesh", "SubMesh.addBoneAssignment"); |
---|
102 | } |
---|
103 | mBoneAssignments.insert( |
---|
104 | VertexBoneAssignmentList::value_type(vertBoneAssign.vertexIndex, vertBoneAssign)); |
---|
105 | mBoneAssignmentsOutOfDate = true; |
---|
106 | } |
---|
107 | //----------------------------------------------------------------------- |
---|
108 | void SubMesh::clearBoneAssignments(void) |
---|
109 | { |
---|
110 | mBoneAssignments.clear(); |
---|
111 | mBoneAssignmentsOutOfDate = true; |
---|
112 | } |
---|
113 | |
---|
114 | //----------------------------------------------------------------------- |
---|
115 | void SubMesh::_compileBoneAssignments(void) |
---|
116 | { |
---|
117 | unsigned short maxBones = |
---|
118 | parent->_rationaliseBoneAssignments(vertexData->vertexCount, mBoneAssignments); |
---|
119 | |
---|
120 | if (maxBones != 0) |
---|
121 | { |
---|
122 | parent->compileBoneAssignments(mBoneAssignments, maxBones, |
---|
123 | blendIndexToBoneIndexMap, vertexData); |
---|
124 | } |
---|
125 | |
---|
126 | mBoneAssignmentsOutOfDate = false; |
---|
127 | } |
---|
128 | //--------------------------------------------------------------------- |
---|
129 | SubMesh::BoneAssignmentIterator SubMesh::getBoneAssignmentIterator(void) |
---|
130 | { |
---|
131 | return BoneAssignmentIterator(mBoneAssignments.begin(), |
---|
132 | mBoneAssignments.end()); |
---|
133 | } |
---|
134 | //--------------------------------------------------------------------- |
---|
135 | SubMesh::AliasTextureIterator SubMesh::getAliasTextureIterator(void) const |
---|
136 | { |
---|
137 | return AliasTextureIterator(mTextureAliases.begin(), |
---|
138 | mTextureAliases.end()); |
---|
139 | } |
---|
140 | //--------------------------------------------------------------------- |
---|
141 | void SubMesh::addTextureAlias(const String& aliasName, const String& textureName) |
---|
142 | { |
---|
143 | mTextureAliases[aliasName] = textureName; |
---|
144 | } |
---|
145 | //--------------------------------------------------------------------- |
---|
146 | void SubMesh::removeTextureAlias(const String& aliasName) |
---|
147 | { |
---|
148 | mTextureAliases.erase(aliasName); |
---|
149 | } |
---|
150 | //--------------------------------------------------------------------- |
---|
151 | void SubMesh::removeAllTextureAliases(void) |
---|
152 | { |
---|
153 | mTextureAliases.clear(); |
---|
154 | } |
---|
155 | //--------------------------------------------------------------------- |
---|
156 | bool SubMesh::updateMaterialUsingTextureAliases(void) |
---|
157 | { |
---|
158 | bool newMaterialCreated = false; |
---|
159 | // if submesh has texture aliases |
---|
160 | // ask the material manager if the current summesh material exists |
---|
161 | if (hasTextureAliases() && MaterialManager::getSingleton().resourceExists(mMaterialName)) |
---|
162 | { |
---|
163 | // get the current submesh material |
---|
164 | MaterialPtr material = MaterialManager::getSingleton().getByName( mMaterialName ); |
---|
165 | // get test result for if change will occur when the texture aliases are applied |
---|
166 | if (material->applyTextureAliases(mTextureAliases, false)) |
---|
167 | { |
---|
168 | // material textures will be changed so copy material, |
---|
169 | // new material name is old material name + index |
---|
170 | // check with material manager and find a unique name |
---|
171 | size_t index = 0; |
---|
172 | String newMaterialName = mMaterialName + "_" + StringConverter::toString(index); |
---|
173 | while (MaterialManager::getSingleton().resourceExists(newMaterialName)) |
---|
174 | { |
---|
175 | // increment index for next name |
---|
176 | newMaterialName = mMaterialName + "_" + StringConverter::toString(++index); |
---|
177 | } |
---|
178 | |
---|
179 | Ogre::MaterialPtr newMaterial = Ogre::MaterialManager::getSingleton().create( |
---|
180 | newMaterialName, material->getGroup()); |
---|
181 | // copy parent material details to new material |
---|
182 | material->copyDetailsTo(newMaterial); |
---|
183 | // apply texture aliases to new material |
---|
184 | newMaterial->applyTextureAliases(mTextureAliases); |
---|
185 | // place new material name in submesh |
---|
186 | setMaterialName(newMaterialName); |
---|
187 | newMaterialCreated = true; |
---|
188 | } |
---|
189 | } |
---|
190 | |
---|
191 | return newMaterialCreated; |
---|
192 | } |
---|
193 | //--------------------------------------------------------------------- |
---|
194 | void SubMesh::removeLodLevels(void) |
---|
195 | { |
---|
196 | ProgressiveMesh::LODFaceList::iterator lodi, lodend; |
---|
197 | lodend = mLodFaceList.end(); |
---|
198 | for (lodi = mLodFaceList.begin(); lodi != lodend; ++lodi) |
---|
199 | { |
---|
200 | delete *lodi; |
---|
201 | } |
---|
202 | |
---|
203 | mLodFaceList.clear(); |
---|
204 | |
---|
205 | } |
---|
206 | //--------------------------------------------------------------------- |
---|
207 | VertexAnimationType SubMesh::getVertexAnimationType(void) const |
---|
208 | { |
---|
209 | if(parent->_getAnimationTypesDirty()) |
---|
210 | { |
---|
211 | parent->_determineAnimationTypes(); |
---|
212 | } |
---|
213 | return mVertexAnimationType; |
---|
214 | } |
---|
215 | //--------------------------------------------------------------------- |
---|
216 | /* To find as many points from different domains as we need, |
---|
217 | * such that those domains are from different parts of the mesh, |
---|
218 | * we implement a simplified Heckbert quantization algorithm. |
---|
219 | * |
---|
220 | * This struct is like AxisAlignedBox with some specialized methods |
---|
221 | * for doing quantization. |
---|
222 | */ |
---|
223 | struct Cluster |
---|
224 | { |
---|
225 | Vector3 mMin, mMax; |
---|
226 | std::set<uint32> mIndices; |
---|
227 | |
---|
228 | Cluster () |
---|
229 | { } |
---|
230 | |
---|
231 | bool empty () const |
---|
232 | { |
---|
233 | if (mIndices.empty ()) |
---|
234 | return true; |
---|
235 | if (mMin == mMax) |
---|
236 | return true; |
---|
237 | return false; |
---|
238 | } |
---|
239 | |
---|
240 | float volume () const |
---|
241 | { |
---|
242 | return (mMax.x - mMin.x) * (mMax.y - mMin.y) * (mMax.z - mMin.z); |
---|
243 | } |
---|
244 | |
---|
245 | void extend (float *v) |
---|
246 | { |
---|
247 | if (v [0] < mMin.x) mMin.x = v [0]; |
---|
248 | if (v [1] < mMin.y) mMin.y = v [1]; |
---|
249 | if (v [2] < mMin.z) mMin.z = v [2]; |
---|
250 | if (v [0] > mMax.x) mMax.x = v [0]; |
---|
251 | if (v [1] > mMax.y) mMax.y = v [1]; |
---|
252 | if (v [2] > mMax.z) mMax.z = v [2]; |
---|
253 | } |
---|
254 | |
---|
255 | void computeBBox (const VertexElement *poselem, uint8 *vdata, size_t vsz) |
---|
256 | { |
---|
257 | mMin.x = mMin.y = mMin.z = Math::POS_INFINITY; |
---|
258 | mMax.x = mMax.y = mMax.z = Math::NEG_INFINITY; |
---|
259 | |
---|
260 | for (std::set<uint32>::const_iterator i = mIndices.begin (); |
---|
261 | i != mIndices.end (); ++i) |
---|
262 | { |
---|
263 | float *v; |
---|
264 | poselem->baseVertexPointerToElement (vdata + *i * vsz, &v); |
---|
265 | extend (v); |
---|
266 | } |
---|
267 | } |
---|
268 | |
---|
269 | Cluster split (int split_axis, const VertexElement *poselem, |
---|
270 | uint8 *vdata, size_t vsz) |
---|
271 | { |
---|
272 | Real r = (mMin [split_axis] + mMax [split_axis]) * 0.5; |
---|
273 | Cluster newbox; |
---|
274 | |
---|
275 | // Separate all points that are inside the new bbox |
---|
276 | for (std::set<uint32>::iterator i = mIndices.begin (); |
---|
277 | i != mIndices.end (); ) |
---|
278 | { |
---|
279 | float *v; |
---|
280 | poselem->baseVertexPointerToElement (vdata + *i * vsz, &v); |
---|
281 | if (v [split_axis] > r) |
---|
282 | { |
---|
283 | newbox.mIndices.insert (*i); |
---|
284 | std::set<uint32>::iterator x = i++; |
---|
285 | mIndices.erase(x); |
---|
286 | } |
---|
287 | else |
---|
288 | ++i; |
---|
289 | } |
---|
290 | |
---|
291 | computeBBox (poselem, vdata, vsz); |
---|
292 | newbox.computeBBox (poselem, vdata, vsz); |
---|
293 | |
---|
294 | return newbox; |
---|
295 | } |
---|
296 | }; |
---|
297 | //--------------------------------------------------------------------- |
---|
298 | void SubMesh::generateExtremes(size_t count) |
---|
299 | { |
---|
300 | extremityPoints.clear(); |
---|
301 | |
---|
302 | /* Currently this uses just one criteria: the points must be |
---|
303 | * as far as possible from each other. This at least ensures |
---|
304 | * that the extreme points characterise the submesh as |
---|
305 | * detailed as it's possible. |
---|
306 | */ |
---|
307 | |
---|
308 | uint elsz = indexData->indexBuffer->getType () == HardwareIndexBuffer::IT_32BIT ? |
---|
309 | 4 : 2; |
---|
310 | uint8 *idata = (uint8 *)indexData->indexBuffer->lock ( |
---|
311 | indexData->indexStart * elsz, indexData->indexCount * elsz, |
---|
312 | HardwareIndexBuffer::HBL_READ_ONLY); |
---|
313 | |
---|
314 | VertexData *vert = useSharedVertices ? |
---|
315 | parent->sharedVertexData : vertexData; |
---|
316 | const VertexElement *poselem = vert->vertexDeclaration-> |
---|
317 | findElementBySemantic (VES_POSITION); |
---|
318 | HardwareVertexBufferSharedPtr vbuf = vert->vertexBufferBinding-> |
---|
319 | getBuffer (poselem->getSource ()); |
---|
320 | uint8 *vdata = (uint8 *)vbuf->lock (HardwareBuffer::HBL_READ_ONLY); |
---|
321 | size_t vsz = vbuf->getVertexSize (); |
---|
322 | |
---|
323 | std::vector<Cluster> boxes; |
---|
324 | boxes.reserve (count); |
---|
325 | |
---|
326 | // First of all, find min and max bounding box of the submesh |
---|
327 | boxes.push_back (Cluster ()); |
---|
328 | for (size_t i = 0; i < indexData->indexCount; i++) |
---|
329 | { |
---|
330 | int idx = (elsz == 2) ? ((uint16 *)idata) [i] : ((uint32 *)idata) [i]; |
---|
331 | boxes [0].mIndices.insert (idx); |
---|
332 | } |
---|
333 | |
---|
334 | boxes [0].computeBBox (poselem, vdata, vsz); |
---|
335 | |
---|
336 | // Remember the geometrical center of the submesh |
---|
337 | Vector3 center = (boxes [0].mMax + boxes [0].mMin) * 0.5; |
---|
338 | |
---|
339 | // Ok, now loop until we have as many boxes, as we need extremes |
---|
340 | while (boxes.size () < count) |
---|
341 | { |
---|
342 | // Find the largest box with more than one vertex :) |
---|
343 | Cluster *split_box = NULL; |
---|
344 | Real split_volume = -1; |
---|
345 | for (std::vector<Cluster>::iterator b = boxes.begin (); |
---|
346 | b != boxes.end (); ++b) |
---|
347 | { |
---|
348 | if (b->empty ()) |
---|
349 | continue; |
---|
350 | Real v = b->volume (); |
---|
351 | if (v > split_volume) |
---|
352 | { |
---|
353 | split_volume = v; |
---|
354 | split_box = &*b; |
---|
355 | } |
---|
356 | } |
---|
357 | |
---|
358 | // If we don't have what to split, break |
---|
359 | if (!split_box) |
---|
360 | break; |
---|
361 | |
---|
362 | // Find the coordinate axis to split the box into two |
---|
363 | int split_axis = 0; |
---|
364 | Real split_length = split_box->mMax.x - split_box->mMin.x; |
---|
365 | for (int i = 1; i < 3; i++) |
---|
366 | { |
---|
367 | Real l = split_box->mMax [i] - split_box->mMin [i]; |
---|
368 | if (l > split_length) |
---|
369 | { |
---|
370 | split_length = l; |
---|
371 | split_axis = i; |
---|
372 | } |
---|
373 | } |
---|
374 | |
---|
375 | // Now split the box into halves |
---|
376 | boxes.push_back (split_box->split (split_axis, poselem, vdata, vsz)); |
---|
377 | } |
---|
378 | |
---|
379 | // Fine, now from every cluster choose the vertex that is most |
---|
380 | // distant from the geometrical center and from other extremes. |
---|
381 | for (std::vector<Cluster>::const_iterator b = boxes.begin (); |
---|
382 | b != boxes.end (); ++b) |
---|
383 | { |
---|
384 | Real rating = 0; |
---|
385 | Vector3 best_vertex; |
---|
386 | |
---|
387 | for (std::set<uint32>::const_iterator i = b->mIndices.begin (); |
---|
388 | i != b->mIndices.end (); ++i) |
---|
389 | { |
---|
390 | float *v; |
---|
391 | poselem->baseVertexPointerToElement (vdata + *i * vsz, &v); |
---|
392 | |
---|
393 | Vector3 vv (v [0], v [1], v [2]); |
---|
394 | Real r = (vv - center).squaredLength (); |
---|
395 | |
---|
396 | for (std::vector<Vector3>::const_iterator e = extremityPoints.begin (); |
---|
397 | e != extremityPoints.end (); ++e) |
---|
398 | r += (*e - vv).squaredLength (); |
---|
399 | if (r > rating) |
---|
400 | { |
---|
401 | rating = r; |
---|
402 | best_vertex = vv; |
---|
403 | } |
---|
404 | } |
---|
405 | |
---|
406 | if (rating > 0) |
---|
407 | extremityPoints.push_back (best_vertex); |
---|
408 | } |
---|
409 | |
---|
410 | vbuf->unlock (); |
---|
411 | indexData->indexBuffer->unlock (); |
---|
412 | } |
---|
413 | } |
---|
414 | |
---|