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) 2000-2005 The OGRE Team
|
---|
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 | */
|
---|
25 | /***************************************************************************
|
---|
26 | terrainrenderable.cpp - description
|
---|
27 | -------------------
|
---|
28 | begin : Sat Oct 5 2002
|
---|
29 | copyright : (C) 2002 by Jon Anderson
|
---|
30 | email : janders@users.sf.net
|
---|
31 |
|
---|
32 | Enhancements 2003 - 2004 (C) The OGRE Team
|
---|
33 |
|
---|
34 | ***************************************************************************/
|
---|
35 |
|
---|
36 | #include "OgreKdTerrainRenderable.h"
|
---|
37 | #include "OgreSceneNode.h"
|
---|
38 | #include "OgreRenderQueue.h"
|
---|
39 | #include "OgreRenderOperation.h"
|
---|
40 | #include "OgreCamera.h"
|
---|
41 | #include "OgreRoot.h"
|
---|
42 | #include "OgreKdTerrainSceneManager.h"
|
---|
43 | #include "OgreLogManager.h"
|
---|
44 | #include "OgreStringConverter.h"
|
---|
45 | #include "OgreViewport.h"
|
---|
46 | #include "OgreException.h"
|
---|
47 |
|
---|
48 | #pragma warning(disable : 4267)
|
---|
49 |
|
---|
50 | namespace Ogre
|
---|
51 | {
|
---|
52 | //-----------------------------------------------------------------------
|
---|
53 | #define MAIN_BINDING 0
|
---|
54 | #define DELTA_BINDING 1
|
---|
55 | //-----------------------------------------------------------------------
|
---|
56 | //-----------------------------------------------------------------------
|
---|
57 | String KdTerrainRenderable::mType = "TerrainMipMap";
|
---|
58 | //-----------------------------------------------------------------------
|
---|
59 | //-----------------------------------------------------------------------
|
---|
60 | #ifdef GTP_VISIBILITY_MODIFIED_OGRE
|
---|
61 | int KdTerrainRenderable::msCurrentRenderLevelIndex = 0;
|
---|
62 | #endif // GTP_VISIBILITY_MODIFIED_OGRE
|
---|
63 | //-----------------------------------------------------------------------
|
---|
64 | KdTerrainRenderable::KdTerrainRenderable(const String& name, KdTerrainSceneManager* tsm)
|
---|
65 | : Renderable(), MovableObject(name), mSceneManager(tsm), mTerrain(0), mDeltaBuffers(0), mPositionBuffer(0)
|
---|
66 | {
|
---|
67 | mForcedRenderLevel = -1;
|
---|
68 | mLastNextLevel = -1;
|
---|
69 |
|
---|
70 | mMinLevelDistSqr = 0;
|
---|
71 |
|
---|
72 | mInit = false;
|
---|
73 | mLightListDirty = true;
|
---|
74 | MovableObject::mCastShadows = false;
|
---|
75 |
|
---|
76 | for ( int i = 0; i < 4; i++ )
|
---|
77 | {
|
---|
78 | mNeighbors[ i ] = 0;
|
---|
79 | }
|
---|
80 |
|
---|
81 | mOptions = &(mSceneManager->getOptions());
|
---|
82 |
|
---|
83 |
|
---|
84 | }
|
---|
85 | //-----------------------------------------------------------------------
|
---|
86 | KdTerrainRenderable::~KdTerrainRenderable()
|
---|
87 | {
|
---|
88 |
|
---|
89 | deleteGeometry();
|
---|
90 | }
|
---|
91 | //-----------------------------------------------------------------------
|
---|
92 | uint32 KdTerrainRenderable::getTypeFlags(void) const
|
---|
93 | {
|
---|
94 | // return world flag
|
---|
95 | return SceneManager::WORLD_GEOMETRY_TYPE_MASK;
|
---|
96 | }
|
---|
97 | //-----------------------------------------------------------------------
|
---|
98 | void KdTerrainRenderable::deleteGeometry()
|
---|
99 | {
|
---|
100 | if(mTerrain)
|
---|
101 | delete mTerrain;
|
---|
102 |
|
---|
103 | if (mPositionBuffer)
|
---|
104 | delete [] mPositionBuffer;
|
---|
105 |
|
---|
106 | if (mDeltaBuffers)
|
---|
107 | delete [] mDeltaBuffers;
|
---|
108 |
|
---|
109 | if ( mMinLevelDistSqr != 0 )
|
---|
110 | delete [] mMinLevelDistSqr;
|
---|
111 | }
|
---|
112 | //-----------------------------------------------------------------------
|
---|
113 | void KdTerrainRenderable::initialise(int startx, int startz,
|
---|
114 | Real* pageHeightData)
|
---|
115 | {
|
---|
116 |
|
---|
117 | if ( mOptions->maxGeoMipMapLevel != 0 )
|
---|
118 | {
|
---|
119 | uint i = ( uint ) 1 << ( mOptions->maxGeoMipMapLevel - 1 ) ;
|
---|
120 |
|
---|
121 | if ( ( i + 1 ) > mOptions->tileSize )
|
---|
122 | {
|
---|
123 | printf( "Invalid maximum mipmap specifed, must be n, such that 2^(n-1)+1 < tileSize \n" );
|
---|
124 | return ;
|
---|
125 | }
|
---|
126 | }
|
---|
127 |
|
---|
128 | deleteGeometry();
|
---|
129 |
|
---|
130 | //calculate min and max heights;
|
---|
131 | Real min = 256000, max = 0;
|
---|
132 |
|
---|
133 | mTerrain = new VertexData;
|
---|
134 | mTerrain->vertexStart = 0;
|
---|
135 | mTerrain->vertexCount = mOptions->tileSize * mOptions->tileSize;
|
---|
136 |
|
---|
137 | VertexDeclaration* decl = mTerrain->vertexDeclaration;
|
---|
138 | VertexBufferBinding* bind = mTerrain->vertexBufferBinding;
|
---|
139 |
|
---|
140 | // positions
|
---|
141 | size_t offset = 0;
|
---|
142 | decl->addElement(MAIN_BINDING, offset, VET_FLOAT3, VES_POSITION);
|
---|
143 | offset += VertexElement::getTypeSize(VET_FLOAT3);
|
---|
144 | if (mOptions->lit)
|
---|
145 | {
|
---|
146 | decl->addElement(MAIN_BINDING, offset, VET_FLOAT3, VES_NORMAL);
|
---|
147 | offset += VertexElement::getTypeSize(VET_FLOAT3);
|
---|
148 | }
|
---|
149 | // texture coord sets
|
---|
150 | decl->addElement(MAIN_BINDING, offset, VET_FLOAT2, VES_TEXTURE_COORDINATES, 0);
|
---|
151 | offset += VertexElement::getTypeSize(VET_FLOAT2);
|
---|
152 | decl->addElement(MAIN_BINDING, offset, VET_FLOAT2, VES_TEXTURE_COORDINATES, 1);
|
---|
153 | offset += VertexElement::getTypeSize(VET_FLOAT2);
|
---|
154 | if (mOptions->coloured)
|
---|
155 | {
|
---|
156 | decl->addElement(MAIN_BINDING, offset, VET_COLOUR, VES_DIFFUSE);
|
---|
157 | offset += VertexElement::getTypeSize(VET_COLOUR);
|
---|
158 | }
|
---|
159 |
|
---|
160 | // Create shared vertex buffer
|
---|
161 | mMainBuffer =
|
---|
162 | HardwareBufferManager::getSingleton().createVertexBuffer(
|
---|
163 | decl->getVertexSize(MAIN_BINDING),
|
---|
164 | mTerrain->vertexCount,
|
---|
165 | HardwareBuffer::HBU_STATIC_WRITE_ONLY);
|
---|
166 | // Create system memory copy with just positions in it, for use in simple reads
|
---|
167 | mPositionBuffer = new float[mTerrain->vertexCount * 3];
|
---|
168 |
|
---|
169 | bind->setBinding(MAIN_BINDING, mMainBuffer);
|
---|
170 |
|
---|
171 | if (mOptions->lodMorph)
|
---|
172 | {
|
---|
173 | // Create additional element for delta
|
---|
174 | decl->addElement(DELTA_BINDING, 0, VET_FLOAT1, VES_BLEND_WEIGHTS);
|
---|
175 | // NB binding is not set here, it is set when deriving the LOD
|
---|
176 | }
|
---|
177 |
|
---|
178 |
|
---|
179 | mInit = true;
|
---|
180 |
|
---|
181 | #ifdef GTP_VISIBILITY_MODIFIED_OGRE
|
---|
182 | for (int i = 0; i < MAX_RENDERLEVEL_INDEX; ++i )
|
---|
183 | {
|
---|
184 | mRenderLevel[i] = 1;
|
---|
185 | }
|
---|
186 | #else
|
---|
187 | mRenderLevel = 1;
|
---|
188 | #endif // GTP_VISIBILITY_MODIFIED_OGRE
|
---|
189 |
|
---|
190 | mMinLevelDistSqr = new Real[ mOptions->maxGeoMipMapLevel ];
|
---|
191 |
|
---|
192 | int endx = startx + mOptions->tileSize;
|
---|
193 |
|
---|
194 | int endz = startz + mOptions->tileSize;
|
---|
195 |
|
---|
196 | Vector3 left, down, here;
|
---|
197 |
|
---|
198 | const VertexElement* poselem = decl->findElementBySemantic(VES_POSITION);
|
---|
199 | const VertexElement* texelem0 = decl->findElementBySemantic(VES_TEXTURE_COORDINATES, 0);
|
---|
200 | const VertexElement* texelem1 = decl->findElementBySemantic(VES_TEXTURE_COORDINATES, 1);
|
---|
201 | float* pSysPos = mPositionBuffer;
|
---|
202 |
|
---|
203 | unsigned char* pBase = static_cast<unsigned char*>(mMainBuffer->lock(HardwareBuffer::HBL_DISCARD));
|
---|
204 |
|
---|
205 | for ( int j = startz; j < endz; j++ )
|
---|
206 | {
|
---|
207 | for ( int i = startx; i < endx; i++ )
|
---|
208 | {
|
---|
209 | float *pPos, *pTex0, *pTex1;
|
---|
210 | poselem->baseVertexPointerToElement(pBase, &pPos);
|
---|
211 | texelem0->baseVertexPointerToElement(pBase, &pTex0);
|
---|
212 | texelem1->baseVertexPointerToElement(pBase, &pTex1);
|
---|
213 |
|
---|
214 | Real height = pageHeightData[j * mOptions->pageSize + i];
|
---|
215 | height = height * mOptions->scale.y; // scale height
|
---|
216 |
|
---|
217 | *pSysPos++ = *pPos++ = ( float ) i * mOptions->scale.x; //x
|
---|
218 | *pSysPos++ = *pPos++ = height; // y
|
---|
219 | *pSysPos++ = *pPos++ = ( float ) j * mOptions->scale.z; //z
|
---|
220 |
|
---|
221 | *pTex0++ = ( float ) i / ( float ) ( mOptions->pageSize - 1 );
|
---|
222 | *pTex0++ = ( float ) j / ( float ) ( mOptions->pageSize - 1 );
|
---|
223 |
|
---|
224 | *pTex1++ = ( ( float ) i / ( float ) ( mOptions->tileSize - 1 ) ) * mOptions->detailTile;
|
---|
225 | *pTex1++ = ( ( float ) j / ( float ) ( mOptions->tileSize - 1 ) ) * mOptions->detailTile;
|
---|
226 |
|
---|
227 | if ( height < min )
|
---|
228 | min = ( Real ) height;
|
---|
229 |
|
---|
230 | if ( height > max )
|
---|
231 | max = ( Real ) height;
|
---|
232 |
|
---|
233 | pBase += mMainBuffer->getVertexSize();
|
---|
234 | }
|
---|
235 | }
|
---|
236 |
|
---|
237 | mMainBuffer->unlock();
|
---|
238 |
|
---|
239 | mBounds.setExtents(
|
---|
240 | ( Real ) startx * mOptions->scale.x,
|
---|
241 | min,
|
---|
242 | ( Real ) startz * mOptions->scale.z,
|
---|
243 | ( Real ) ( endx - 1 ) * mOptions->scale.x,
|
---|
244 | max,
|
---|
245 | ( Real ) ( endz - 1 ) * mOptions->scale.z );
|
---|
246 |
|
---|
247 |
|
---|
248 | mCenter = Vector3( ( startx * mOptions->scale.x + (endx - 1) * mOptions->scale.x ) / 2,
|
---|
249 | ( min + max ) / 2,
|
---|
250 | ( startz * mOptions->scale.z + (endz - 1) * mOptions->scale.z ) / 2 );
|
---|
251 |
|
---|
252 | mBoundingRadius =
|
---|
253 | std::max(max - min,
|
---|
254 | std::max((endx - 1 - startx) * mOptions->scale.x,
|
---|
255 | (endz - 1 - startz) * mOptions->scale.z)) / 2;
|
---|
256 |
|
---|
257 | // Create delta buffer list if required to morph
|
---|
258 | if (mOptions->lodMorph)
|
---|
259 | {
|
---|
260 | // Create delta buffer for all except the lowest mip
|
---|
261 | mDeltaBuffers = new HardwareVertexBufferSharedPtr[mOptions->maxGeoMipMapLevel - 1];
|
---|
262 | }
|
---|
263 |
|
---|
264 | Real C = _calculateCFactor();
|
---|
265 |
|
---|
266 | _calculateMinLevelDist2( C );
|
---|
267 |
|
---|
268 | }
|
---|
269 | //-----------------------------------------------------------------------
|
---|
270 | void KdTerrainRenderable::_getNormalAt( float x, float z, Vector3 * result )
|
---|
271 | {
|
---|
272 |
|
---|
273 | assert(mOptions->lit && "No normals present");
|
---|
274 |
|
---|
275 | Vector3 here, left, down;
|
---|
276 | here.x = x;
|
---|
277 | here.y = getHeightAt( x, z );
|
---|
278 | here.z = z;
|
---|
279 |
|
---|
280 | left.x = x - 1;
|
---|
281 | left.y = getHeightAt( x - 1, z );
|
---|
282 | left.z = z;
|
---|
283 |
|
---|
284 | down.x = x;
|
---|
285 | down.y = getHeightAt( x, z + 1 );
|
---|
286 | down.z = z + 1;
|
---|
287 |
|
---|
288 | left = left - here;
|
---|
289 |
|
---|
290 | down = down - here;
|
---|
291 |
|
---|
292 | left.normalise();
|
---|
293 | down.normalise();
|
---|
294 |
|
---|
295 | *result = left.crossProduct( down );
|
---|
296 | result -> normalise();
|
---|
297 |
|
---|
298 | // result->x = - result->x;
|
---|
299 | // result->y = - result->y;
|
---|
300 | // result->z = - result->z;
|
---|
301 | }
|
---|
302 | //-----------------------------------------------------------------------
|
---|
303 | void KdTerrainRenderable::_calculateNormals()
|
---|
304 | {
|
---|
305 |
|
---|
306 | Vector3 norm;
|
---|
307 |
|
---|
308 | assert (mOptions->lit && "No normals present");
|
---|
309 |
|
---|
310 | HardwareVertexBufferSharedPtr vbuf =
|
---|
311 | mTerrain->vertexBufferBinding->getBuffer(MAIN_BINDING);
|
---|
312 | const VertexElement* elem = mTerrain->vertexDeclaration->findElementBySemantic(VES_NORMAL);
|
---|
313 | unsigned char* pBase = static_cast<unsigned char*>( vbuf->lock(HardwareBuffer::HBL_DISCARD) );
|
---|
314 | float* pNorm;
|
---|
315 |
|
---|
316 | for ( uint j = 0; j < mOptions->tileSize; j++ )
|
---|
317 | {
|
---|
318 | for ( uint i = 0; i < mOptions->tileSize; i++ )
|
---|
319 | {
|
---|
320 |
|
---|
321 | _getNormalAt( _vertex( i, j, 0 ), _vertex( i, j, 2 ), &norm );
|
---|
322 |
|
---|
323 | // printf( "Normal = %5f,%5f,%5f\n", norm.x, norm.y, norm.z );
|
---|
324 | elem->baseVertexPointerToElement(pBase, &pNorm);
|
---|
325 | *pNorm++ = norm.x;
|
---|
326 | *pNorm++ = norm.y;
|
---|
327 | *pNorm++ = norm.z;
|
---|
328 | pBase += vbuf->getVertexSize();
|
---|
329 | }
|
---|
330 |
|
---|
331 | }
|
---|
332 | vbuf->unlock();
|
---|
333 | }
|
---|
334 | //-----------------------------------------------------------------------
|
---|
335 | void KdTerrainRenderable::_notifyCurrentCamera( Camera* cam )
|
---|
336 | {
|
---|
337 | MovableObject::_notifyCurrentCamera(cam);
|
---|
338 |
|
---|
339 | if ( mForcedRenderLevel >= 0 )
|
---|
340 | {
|
---|
341 | #ifdef GTP_VISIBILITY_MODIFIED_OGRE
|
---|
342 | mRenderLevel[msCurrentRenderLevelIndex] = mForcedRenderLevel;
|
---|
343 | #else
|
---|
344 | mRenderLevel = mForcedRenderLevel;
|
---|
345 | #endif // GTP_VISIBILITY_MODIFIED_OGRE
|
---|
346 | return ;
|
---|
347 | }
|
---|
348 |
|
---|
349 |
|
---|
350 | Vector3 cpos = cam -> getDerivedPosition();
|
---|
351 | const AxisAlignedBox& aabb = getWorldBoundingBox(true);
|
---|
352 | Vector3 diff(0, 0, 0);
|
---|
353 | diff.makeFloor(cpos - aabb.getMinimum());
|
---|
354 | diff.makeCeil(cpos - aabb.getMaximum());
|
---|
355 |
|
---|
356 | Real L = diff.squaredLength();
|
---|
357 |
|
---|
358 | #ifdef GTP_VISIBILITY_MODIFIED_OGRE
|
---|
359 | mRenderLevel[msCurrentRenderLevelIndex] = -1;;
|
---|
360 | #else
|
---|
361 | mRenderLevel = -1;
|
---|
362 | #endif // GTP_VISIBILITY_MODIFIED_OGRE
|
---|
363 |
|
---|
364 |
|
---|
365 | for ( uint i = 0; i < mOptions->maxGeoMipMapLevel; i++ )
|
---|
366 | {
|
---|
367 | if ( mMinLevelDistSqr[ i ] > L )
|
---|
368 | {
|
---|
369 | #ifdef GTP_VISIBILITY_MODIFIED_OGRE
|
---|
370 | mRenderLevel[msCurrentRenderLevelIndex] = i - 1;
|
---|
371 | #else
|
---|
372 | mRenderLevel = i - 1;
|
---|
373 | #endif // GTP_VISIBILITY_MODIFIED_OGRE
|
---|
374 | break;
|
---|
375 | }
|
---|
376 | }
|
---|
377 |
|
---|
378 | #ifdef GTP_VISIBILITY_MODIFIED_OGRE
|
---|
379 | if ( getRenderLevel() < 0 )
|
---|
380 | mRenderLevel[msCurrentRenderLevelIndex] = mOptions->maxGeoMipMapLevel - 1;
|
---|
381 | #else
|
---|
382 | if ( mRenderLevel < 0 )
|
---|
383 | mRenderLevel = mOptions->maxGeoMipMapLevel - 1;
|
---|
384 | #endif // GTP_VISIBILITY_MODIFIED_OGRE
|
---|
385 |
|
---|
386 | if (mOptions->lodMorph)
|
---|
387 | {
|
---|
388 | // Get the next LOD level down
|
---|
389 | #ifdef GTP_VISIBILITY_MODIFIED_OGRE
|
---|
390 | int nextLevel = mNextLevelDown[getRenderLevel()];
|
---|
391 | #else
|
---|
392 | int nextLevel = mNextLevelDown[mRenderLevel];
|
---|
393 | #endif // GTP_VISIBILITY_MODIFIED_OGRE
|
---|
394 | if (nextLevel == 0)
|
---|
395 | {
|
---|
396 | // No next level, so never morph
|
---|
397 | mLODMorphFactor = 0;
|
---|
398 | }
|
---|
399 | else
|
---|
400 | {
|
---|
401 | // Set the morph such that the morph happens in the last 0.25 of
|
---|
402 | // the distance range
|
---|
403 | #ifdef GTP_VISIBILITY_MODIFIED_OGRE
|
---|
404 | Real range = mMinLevelDistSqr[nextLevel] - mMinLevelDistSqr[getRenderLevel()];
|
---|
405 | #else
|
---|
406 | Real range = mMinLevelDistSqr[nextLevel] - mMinLevelDistSqr[mRenderLevel];
|
---|
407 | #endif // GTP_VISIBILITY_MODIFIED_OGRE
|
---|
408 | if (range)
|
---|
409 | {
|
---|
410 | #ifdef GTP_VISIBILITY_MODIFIED_OGRE
|
---|
411 | Real percent = (L - mMinLevelDistSqr[getRenderLevel()]) / range;
|
---|
412 | #else
|
---|
413 | Real percent = (L - mMinLevelDistSqr[mRenderLevel]) / range;
|
---|
414 | #endif // GTP_VISIBILITY_MODIFIED_OGRE
|
---|
415 | // scale result so that msLODMorphStart == 0, 1 == 1, clamp to 0 below that
|
---|
416 | Real rescale = 1.0f / (1.0f - mOptions->lodMorphStart);
|
---|
417 | mLODMorphFactor = std::max((percent - mOptions->lodMorphStart) * rescale,
|
---|
418 | static_cast<Real>(0.0));
|
---|
419 | }
|
---|
420 | else
|
---|
421 | {
|
---|
422 | // Identical ranges
|
---|
423 | mLODMorphFactor = 0.0f;
|
---|
424 | }
|
---|
425 |
|
---|
426 | assert(mLODMorphFactor >= 0 && mLODMorphFactor <= 1);
|
---|
427 | }
|
---|
428 |
|
---|
429 | // Bind the correct delta buffer if it has changed
|
---|
430 | // nextLevel - 1 since the first entry is for LOD 1 (since LOD 0 never needs it)
|
---|
431 | if (mLastNextLevel != nextLevel)
|
---|
432 | {
|
---|
433 | if (nextLevel > 0)
|
---|
434 | {
|
---|
435 | mTerrain->vertexBufferBinding->setBinding(DELTA_BINDING,
|
---|
436 | mDeltaBuffers[nextLevel - 1]);
|
---|
437 | }
|
---|
438 | else
|
---|
439 | {
|
---|
440 | // bind dummy (incase bindings checked)
|
---|
441 | mTerrain->vertexBufferBinding->setBinding(DELTA_BINDING,
|
---|
442 | mDeltaBuffers[0]);
|
---|
443 | }
|
---|
444 | }
|
---|
445 | mLastNextLevel = nextLevel;
|
---|
446 |
|
---|
447 | }
|
---|
448 |
|
---|
449 | }
|
---|
450 | //-----------------------------------------------------------------------
|
---|
451 | void KdTerrainRenderable::_updateRenderQueue( RenderQueue* queue )
|
---|
452 | {
|
---|
453 | // Notify need to calculate light list when our sending to render queue
|
---|
454 | mLightListDirty = true;
|
---|
455 |
|
---|
456 | queue->addRenderable( this );
|
---|
457 | }
|
---|
458 | //-----------------------------------------------------------------------
|
---|
459 | void KdTerrainRenderable::getRenderOperation( RenderOperation& op )
|
---|
460 | {
|
---|
461 | //setup indexes for vertices and uvs...
|
---|
462 |
|
---|
463 | assert( mInit && "Uninitialized" );
|
---|
464 |
|
---|
465 | op.useIndexes = true;
|
---|
466 | op.operationType = mOptions->useTriStrips ?
|
---|
467 | RenderOperation::OT_TRIANGLE_STRIP : RenderOperation::OT_TRIANGLE_LIST;
|
---|
468 | op.vertexData = mTerrain;
|
---|
469 | op.indexData = getIndexData();
|
---|
470 |
|
---|
471 |
|
---|
472 | }
|
---|
473 | //-----------------------------------------------------------------------
|
---|
474 | void KdTerrainRenderable::getWorldTransforms( Matrix4* xform ) const
|
---|
475 | {
|
---|
476 | *xform = mParentNode->_getFullTransform();
|
---|
477 | }
|
---|
478 | //-----------------------------------------------------------------------
|
---|
479 | const Quaternion& KdTerrainRenderable::getWorldOrientation(void) const
|
---|
480 | {
|
---|
481 | return mParentNode->_getDerivedOrientation();
|
---|
482 | }
|
---|
483 | //-----------------------------------------------------------------------
|
---|
484 | const Vector3& KdTerrainRenderable::getWorldPosition(void) const
|
---|
485 | {
|
---|
486 | return mParentNode->_getDerivedPosition();
|
---|
487 | }
|
---|
488 | //-----------------------------------------------------------------------
|
---|
489 | bool KdTerrainRenderable::_checkSize( int n )
|
---|
490 | {
|
---|
491 | for ( int i = 0; i < 10; i++ )
|
---|
492 | {
|
---|
493 | if ( ( ( 1 << i ) + 1 ) == n )
|
---|
494 | return true;
|
---|
495 | }
|
---|
496 |
|
---|
497 | return false;
|
---|
498 | }
|
---|
499 | //-----------------------------------------------------------------------
|
---|
500 | void KdTerrainRenderable::_calculateMinLevelDist2( Real C )
|
---|
501 | {
|
---|
502 | //level 0 has no delta.
|
---|
503 | mMinLevelDistSqr[ 0 ] = 0;
|
---|
504 |
|
---|
505 | int i, j;
|
---|
506 |
|
---|
507 | for ( int level = 1; level < mOptions->maxGeoMipMapLevel; level++ )
|
---|
508 | {
|
---|
509 | mMinLevelDistSqr[ level ] = 0;
|
---|
510 |
|
---|
511 | int step = 1 << level;
|
---|
512 | // The step of the next higher LOD
|
---|
513 | int higherstep = step >> 1;
|
---|
514 |
|
---|
515 | float* pDeltas = 0;
|
---|
516 | if (mOptions->lodMorph)
|
---|
517 | {
|
---|
518 | // Create a set of delta values (store at index - 1 since 0 has none)
|
---|
519 | mDeltaBuffers[level - 1] = createDeltaBuffer();
|
---|
520 | // Lock, but don't discard (we want the pre-initialised zeros)
|
---|
521 | pDeltas = static_cast<float*>(
|
---|
522 | mDeltaBuffers[level - 1]->lock(HardwareBuffer::HBL_NORMAL));
|
---|
523 | }
|
---|
524 |
|
---|
525 | for ( j = 0; j < mOptions->tileSize - step; j += step )
|
---|
526 | {
|
---|
527 | for ( i = 0; i < mOptions->tileSize - step; i += step )
|
---|
528 | {
|
---|
529 | /* Form planes relating to the lower detail tris to be produced
|
---|
530 | For tri lists and even tri strip rows, they are this shape:
|
---|
531 | x---x
|
---|
532 | | / |
|
---|
533 | x---x
|
---|
534 | For odd tri strip rows, they are this shape:
|
---|
535 | x---x
|
---|
536 | | \ |
|
---|
537 | x---x
|
---|
538 | */
|
---|
539 |
|
---|
540 | Vector3 v1(_vertex( i, j, 0 ), _vertex( i, j, 1 ), _vertex( i, j, 2 ));
|
---|
541 | Vector3 v2(_vertex( i + step, j, 0 ), _vertex( i + step, j, 1 ), _vertex( i + step, j, 2 ));
|
---|
542 | Vector3 v3(_vertex( i, j + step, 0 ), _vertex( i, j + step, 1 ), _vertex( i, j + step, 2 ));
|
---|
543 | Vector3 v4(_vertex( i + step, j + step, 0 ), _vertex( i + step, j + step, 1 ), _vertex( i + step, j + step, 2 ));
|
---|
544 |
|
---|
545 | Plane t1, t2;
|
---|
546 | bool backwardTri = false;
|
---|
547 | if (!mOptions->useTriStrips || j % 2 == 0)
|
---|
548 | {
|
---|
549 | t1.redefine(v1, v3, v2);
|
---|
550 | t2.redefine(v2, v3, v4);
|
---|
551 | }
|
---|
552 | else
|
---|
553 | {
|
---|
554 | t1.redefine(v1, v3, v4);
|
---|
555 | t2.redefine(v1, v4, v2);
|
---|
556 | backwardTri = true;
|
---|
557 | }
|
---|
558 |
|
---|
559 | // include the bottommost row of vertices if this is the last row
|
---|
560 | int zubound = (j == (mOptions->tileSize - step)? step : step - 1);
|
---|
561 | for ( int z = 0; z <= zubound; z++ )
|
---|
562 | {
|
---|
563 | // include the rightmost col of vertices if this is the last col
|
---|
564 | int xubound = (i == (mOptions->tileSize - step)? step : step - 1);
|
---|
565 | for ( int x = 0; x <= xubound; x++ )
|
---|
566 | {
|
---|
567 | int fulldetailx = i + x;
|
---|
568 | int fulldetailz = j + z;
|
---|
569 | if ( fulldetailx % step == 0 &&
|
---|
570 | fulldetailz % step == 0 )
|
---|
571 | {
|
---|
572 | // Skip, this one is a vertex at this level
|
---|
573 | continue;
|
---|
574 | }
|
---|
575 |
|
---|
576 | Real zpct = (Real)z / (Real)step;
|
---|
577 | Real xpct = (Real)x / (Real)step;
|
---|
578 |
|
---|
579 | //interpolated height
|
---|
580 | Vector3 actualPos(
|
---|
581 | _vertex( fulldetailx, fulldetailz, 0 ),
|
---|
582 | _vertex( fulldetailx, fulldetailz, 1 ),
|
---|
583 | _vertex( fulldetailx, fulldetailz, 2 ));
|
---|
584 | Real interp_h;
|
---|
585 | // Determine which tri we're on
|
---|
586 | if ((xpct + zpct <= 1.0f && !backwardTri) ||
|
---|
587 | (xpct + (1-zpct) <= 1.0f && backwardTri))
|
---|
588 | {
|
---|
589 | // Solve for x/z
|
---|
590 | interp_h =
|
---|
591 | (-(t1.normal.x * actualPos.x)
|
---|
592 | - t1.normal.z * actualPos.z
|
---|
593 | - t1.d) / t1.normal.y;
|
---|
594 | }
|
---|
595 | else
|
---|
596 | {
|
---|
597 | // Second tri
|
---|
598 | interp_h =
|
---|
599 | (-(t2.normal.x * actualPos.x)
|
---|
600 | - t2.normal.z * actualPos.z
|
---|
601 | - t2.d) / t2.normal.y;
|
---|
602 | }
|
---|
603 |
|
---|
604 | Real actual_h = _vertex( fulldetailx, fulldetailz, 1 );
|
---|
605 | Real delta = fabs( interp_h - actual_h );
|
---|
606 |
|
---|
607 | Real D2 = delta * delta * C * C;
|
---|
608 |
|
---|
609 | if ( mMinLevelDistSqr[ level ] < D2 )
|
---|
610 | mMinLevelDistSqr[ level ] = D2;
|
---|
611 |
|
---|
612 | // Should be save height difference?
|
---|
613 | // Don't morph along edges
|
---|
614 | if (mOptions->lodMorph &&
|
---|
615 | fulldetailx != 0 && fulldetailx != (mOptions->tileSize - 1) &&
|
---|
616 | fulldetailz != 0 && fulldetailz != (mOptions->tileSize - 1) )
|
---|
617 | {
|
---|
618 | // Save height difference
|
---|
619 | pDeltas[fulldetailx + (fulldetailz * mOptions->tileSize)] =
|
---|
620 | interp_h - actual_h;
|
---|
621 | }
|
---|
622 |
|
---|
623 | }
|
---|
624 |
|
---|
625 | }
|
---|
626 | }
|
---|
627 | }
|
---|
628 |
|
---|
629 | // Unlock morph deltas if required
|
---|
630 | if (mOptions->lodMorph)
|
---|
631 | {
|
---|
632 | mDeltaBuffers[level - 1]->unlock();
|
---|
633 | }
|
---|
634 | }
|
---|
635 |
|
---|
636 |
|
---|
637 |
|
---|
638 | // Post validate the whole set
|
---|
639 | for ( i = 1; i < mOptions->maxGeoMipMapLevel; i++ )
|
---|
640 | {
|
---|
641 |
|
---|
642 | // Make sure no LOD transition within the tile
|
---|
643 | // This is especially a problem when using large tiles with flat areas
|
---|
644 | /* Hmm, this can look bad on some areas, disable for now
|
---|
645 | Vector3 delta(_vertex(0,0,0), mCenter.y, _vertex(0,0,2));
|
---|
646 | delta = delta - mCenter;
|
---|
647 | Real minDist = delta.squaredLength();
|
---|
648 | mMinLevelDistSqr[ i ] = std::max(mMinLevelDistSqr[ i ], minDist);
|
---|
649 | */
|
---|
650 |
|
---|
651 | //make sure the levels are increasing...
|
---|
652 | if ( mMinLevelDistSqr[ i ] < mMinLevelDistSqr[ i - 1 ] )
|
---|
653 | {
|
---|
654 | mMinLevelDistSqr[ i ] = mMinLevelDistSqr[ i - 1 ];
|
---|
655 | }
|
---|
656 | }
|
---|
657 |
|
---|
658 | // Now reverse traverse the list setting the 'next level down'
|
---|
659 | Real lastDist = -1;
|
---|
660 | int lastIndex = 0;
|
---|
661 | for (i = mOptions->maxGeoMipMapLevel - 1; i >= 0; --i)
|
---|
662 | {
|
---|
663 | if (i == mOptions->maxGeoMipMapLevel - 1)
|
---|
664 | {
|
---|
665 | // Last one is always 0
|
---|
666 | lastIndex = i;
|
---|
667 | lastDist = mMinLevelDistSqr[i];
|
---|
668 | mNextLevelDown[i] = 0;
|
---|
669 | }
|
---|
670 | else
|
---|
671 | {
|
---|
672 | mNextLevelDown[i] = lastIndex;
|
---|
673 | if (mMinLevelDistSqr[i] != lastDist)
|
---|
674 | {
|
---|
675 | lastIndex = i;
|
---|
676 | lastDist = mMinLevelDistSqr[i];
|
---|
677 | }
|
---|
678 | }
|
---|
679 |
|
---|
680 | }
|
---|
681 |
|
---|
682 |
|
---|
683 | }
|
---|
684 | //-----------------------------------------------------------------------
|
---|
685 | void KdTerrainRenderable::_adjustRenderLevel( int i )
|
---|
686 | {
|
---|
687 |
|
---|
688 | #ifdef GTP_VISIBILITY_MODIFIED_OGRE
|
---|
689 | mRenderLevel[msCurrentRenderLevelIndex] = i;
|
---|
690 | #else
|
---|
691 | mRenderLevel = i;
|
---|
692 | #endif // GTP_VISIBILITY_MODIFIED_OGRE
|
---|
693 | }
|
---|
694 | //-----------------------------------------------------------------------
|
---|
695 | Real KdTerrainRenderable::_calculateCFactor()
|
---|
696 | {
|
---|
697 | Real A, T;
|
---|
698 |
|
---|
699 | if (!mOptions->primaryCamera)
|
---|
700 | {
|
---|
701 | OGRE_EXCEPT(Exception::ERR_ITEM_NOT_FOUND,
|
---|
702 | "You have not created a camera yet!",
|
---|
703 | "KdTerrainRenderable::_calculateCFactor");
|
---|
704 | }
|
---|
705 |
|
---|
706 | //A = 1 / Math::Tan(Math::AngleUnitsToRadians(opts.primaryCamera->getFOVy()));
|
---|
707 | // Turn off detail compression at higher FOVs
|
---|
708 | A = 1.0f;
|
---|
709 |
|
---|
710 | int vertRes = mOptions->primaryCamera->getViewport()->getActualHeight();
|
---|
711 |
|
---|
712 | T = 2 * ( Real ) mOptions->maxPixelError / ( Real ) vertRes;
|
---|
713 |
|
---|
714 | return A / T;
|
---|
715 | }
|
---|
716 | //-----------------------------------------------------------------------
|
---|
717 | float KdTerrainRenderable::getHeightAt( float x, float z )
|
---|
718 | {
|
---|
719 | Vector3 start;
|
---|
720 | Vector3 end;
|
---|
721 |
|
---|
722 | start.x = _vertex( 0, 0, 0 );
|
---|
723 | start.y = _vertex( 0, 0, 1 );
|
---|
724 | start.z = _vertex( 0, 0, 2 );
|
---|
725 |
|
---|
726 | end.x = _vertex( mOptions->tileSize - 1, mOptions->tileSize - 1, 0 );
|
---|
727 | end.y = _vertex( mOptions->tileSize - 1, mOptions->tileSize - 1, 1 );
|
---|
728 | end.z = _vertex( mOptions->tileSize - 1, mOptions->tileSize - 1, 2 );
|
---|
729 |
|
---|
730 | /* Safety catch, if the point asked for is outside
|
---|
731 | * of this tile, it will ask the appropriate tile
|
---|
732 | */
|
---|
733 |
|
---|
734 | if ( x < start.x )
|
---|
735 | {
|
---|
736 | if ( mNeighbors[ WEST ] != 0 )
|
---|
737 | return mNeighbors[ WEST ] ->getHeightAt( x, z );
|
---|
738 | else
|
---|
739 | x = start.x;
|
---|
740 | }
|
---|
741 |
|
---|
742 | if ( x > end.x )
|
---|
743 | {
|
---|
744 | if ( mNeighbors[ EAST ] != 0 )
|
---|
745 | return mNeighbors[ EAST ] ->getHeightAt( x, z );
|
---|
746 | else
|
---|
747 | x = end.x;
|
---|
748 | }
|
---|
749 |
|
---|
750 | if ( z < start.z )
|
---|
751 | {
|
---|
752 | if ( mNeighbors[ NORTH ] != 0 )
|
---|
753 | return mNeighbors[ NORTH ] ->getHeightAt( x, z );
|
---|
754 | else
|
---|
755 | z = start.z;
|
---|
756 | }
|
---|
757 |
|
---|
758 | if ( z > end.z )
|
---|
759 | {
|
---|
760 | if ( mNeighbors[ SOUTH ] != 0 )
|
---|
761 | return mNeighbors[ SOUTH ] ->getHeightAt( x, z );
|
---|
762 | else
|
---|
763 | z = end.z;
|
---|
764 | }
|
---|
765 |
|
---|
766 |
|
---|
767 |
|
---|
768 | float x_pct = ( x - start.x ) / ( end.x - start.x );
|
---|
769 | float z_pct = ( z - start.z ) / ( end.z - start.z );
|
---|
770 |
|
---|
771 | float x_pt = x_pct * ( float ) ( mOptions->tileSize - 1 );
|
---|
772 | float z_pt = z_pct * ( float ) ( mOptions->tileSize - 1 );
|
---|
773 |
|
---|
774 | int x_index = ( int ) x_pt;
|
---|
775 | int z_index = ( int ) z_pt;
|
---|
776 |
|
---|
777 | // If we got to the far right / bottom edge, move one back
|
---|
778 | if (x_index == mOptions->tileSize - 1)
|
---|
779 | {
|
---|
780 | --x_index;
|
---|
781 | x_pct = 1.0f;
|
---|
782 | }
|
---|
783 | else
|
---|
784 | {
|
---|
785 | // get remainder
|
---|
786 | x_pct = x_pt - x_index;
|
---|
787 | }
|
---|
788 | if (z_index == mOptions->tileSize - 1)
|
---|
789 | {
|
---|
790 | --z_index;
|
---|
791 | z_pct = 1.0f;
|
---|
792 | }
|
---|
793 | else
|
---|
794 | {
|
---|
795 | z_pct = z_pt - z_index;
|
---|
796 | }
|
---|
797 |
|
---|
798 | //bilinear interpolate to find the height.
|
---|
799 |
|
---|
800 | float t1 = _vertex( x_index, z_index, 1 );
|
---|
801 | float t2 = _vertex( x_index + 1, z_index, 1 );
|
---|
802 | float b1 = _vertex( x_index, z_index + 1, 1 );
|
---|
803 | float b2 = _vertex( x_index + 1, z_index + 1, 1 );
|
---|
804 |
|
---|
805 | float midpoint = (b1 + t2) / 2.0;
|
---|
806 |
|
---|
807 | if (x_pct + z_pct <= 1) {
|
---|
808 | b2 = midpoint + (midpoint - t1);
|
---|
809 | } else {
|
---|
810 | t1 = midpoint + (midpoint - b2);
|
---|
811 | }
|
---|
812 |
|
---|
813 | float t = ( t1 * ( 1 - x_pct ) ) + ( t2 * ( x_pct ) );
|
---|
814 | float b = ( b1 * ( 1 - x_pct ) ) + ( b2 * ( x_pct ) );
|
---|
815 |
|
---|
816 | float h = ( t * ( 1 - z_pct ) ) + ( b * ( z_pct ) );
|
---|
817 |
|
---|
818 | return h;
|
---|
819 | }
|
---|
820 | //-----------------------------------------------------------------------
|
---|
821 | bool KdTerrainRenderable::intersectSegment( const Vector3 & start, const Vector3 & end, Vector3 * result )
|
---|
822 | {
|
---|
823 | Vector3 dir = end - start;
|
---|
824 | Vector3 ray = start;
|
---|
825 |
|
---|
826 | //special case...
|
---|
827 | if ( dir.x == 0 && dir.z == 0 )
|
---|
828 | {
|
---|
829 | if ( ray.y <= getHeightAt( ray.x, ray.z ) )
|
---|
830 | {
|
---|
831 | if ( result != 0 )
|
---|
832 | * result = start;
|
---|
833 |
|
---|
834 | return true;
|
---|
835 | }
|
---|
836 | }
|
---|
837 |
|
---|
838 | dir.normalise();
|
---|
839 |
|
---|
840 | //dir.x *= mScale.x;
|
---|
841 | //dir.y *= mScale.y;
|
---|
842 | //dir.z *= mScale.z;
|
---|
843 |
|
---|
844 | const Vector3 * corners = getBoundingBox().getAllCorners();
|
---|
845 |
|
---|
846 | //start with the next one...
|
---|
847 | ray += dir;
|
---|
848 |
|
---|
849 |
|
---|
850 | while ( ! ( ( ray.x < corners[ 0 ].x ) ||
|
---|
851 | ( ray.x > corners[ 4 ].x ) ||
|
---|
852 | ( ray.z < corners[ 0 ].z ) ||
|
---|
853 | ( ray.z > corners[ 4 ].z ) ) )
|
---|
854 | {
|
---|
855 |
|
---|
856 |
|
---|
857 | float h = getHeightAt( ray.x, ray.z );
|
---|
858 |
|
---|
859 | if ( ray.y <= h )
|
---|
860 | {
|
---|
861 | if ( result != 0 )
|
---|
862 | * result = ray;
|
---|
863 |
|
---|
864 | return true;
|
---|
865 | }
|
---|
866 |
|
---|
867 | else
|
---|
868 | {
|
---|
869 | ray += dir;
|
---|
870 | }
|
---|
871 |
|
---|
872 | }
|
---|
873 |
|
---|
874 | if ( ray.x < corners[ 0 ].x && mNeighbors[ WEST ] != 0 )
|
---|
875 | return mNeighbors[ WEST ] ->intersectSegment( ray, end, result );
|
---|
876 | else if ( ray.z < corners[ 0 ].z && mNeighbors[ NORTH ] != 0 )
|
---|
877 | return mNeighbors[ NORTH ] ->intersectSegment( ray, end, result );
|
---|
878 | else if ( ray.x > corners[ 4 ].x && mNeighbors[ EAST ] != 0 )
|
---|
879 | return mNeighbors[ EAST ] ->intersectSegment( ray, end, result );
|
---|
880 | else if ( ray.z > corners[ 4 ].z && mNeighbors[ SOUTH ] != 0 )
|
---|
881 | return mNeighbors[ SOUTH ] ->intersectSegment( ray, end, result );
|
---|
882 | else
|
---|
883 | {
|
---|
884 | if ( result != 0 )
|
---|
885 | * result = Vector3( -1, -1, -1 );
|
---|
886 |
|
---|
887 | return false;
|
---|
888 | }
|
---|
889 | }
|
---|
890 | //-----------------------------------------------------------------------
|
---|
891 | void KdTerrainRenderable::_generateVertexLighting( const Vector3 &sun, ColourValue ambient )
|
---|
892 | {
|
---|
893 |
|
---|
894 | Vector3 pt;
|
---|
895 | Vector3 normal;
|
---|
896 | Vector3 light;
|
---|
897 |
|
---|
898 | HardwareVertexBufferSharedPtr vbuf =
|
---|
899 | mTerrain->vertexBufferBinding->getBuffer(MAIN_BINDING);
|
---|
900 | const VertexElement* elem = mTerrain->vertexDeclaration->findElementBySemantic(VES_DIFFUSE);
|
---|
901 | //for each point in the terrain, see if it's in the line of sight for the sun.
|
---|
902 | for ( size_t i = 0; i < mOptions->tileSize; i++ )
|
---|
903 | {
|
---|
904 | for ( size_t j = 0; j < mOptions->tileSize; j++ )
|
---|
905 | {
|
---|
906 | // printf( "Checking %f,%f,%f ", pt.x, pt.y, pt.z );
|
---|
907 | pt.x = _vertex( i, j, 0 );
|
---|
908 | pt.y = _vertex( i, j, 1 );
|
---|
909 | pt.z = _vertex( i, j, 2 );
|
---|
910 |
|
---|
911 | light = sun - pt;
|
---|
912 |
|
---|
913 | light.normalise();
|
---|
914 |
|
---|
915 | if ( ! intersectSegment( pt, sun, 0 ) )
|
---|
916 | {
|
---|
917 | //
|
---|
918 | _getNormalAt( _vertex( i, j, 0 ), _vertex( i, j, 2 ), &normal );
|
---|
919 |
|
---|
920 | float l = light.dotProduct( normal );
|
---|
921 |
|
---|
922 | ColourValue v;
|
---|
923 | v.r = ambient.r + l;
|
---|
924 | v.g = ambient.g + l;
|
---|
925 | v.b = ambient.b + l;
|
---|
926 |
|
---|
927 | if ( v.r > 1 ) v.r = 1;
|
---|
928 |
|
---|
929 | if ( v.g > 1 ) v.g = 1;
|
---|
930 |
|
---|
931 | if ( v.b > 1 ) v.b = 1;
|
---|
932 |
|
---|
933 | if ( v.r < 0 ) v.r = 0;
|
---|
934 |
|
---|
935 | if ( v.g < 0 ) v.g = 0;
|
---|
936 |
|
---|
937 | if ( v.b < 0 ) v.b = 0;
|
---|
938 |
|
---|
939 | RGBA colour;
|
---|
940 | Root::getSingleton().convertColourValue( v, &colour );
|
---|
941 | vbuf->writeData(
|
---|
942 | (_index( i, j ) * vbuf->getVertexSize()) + elem->getOffset(),
|
---|
943 | sizeof(RGBA), &colour);
|
---|
944 | }
|
---|
945 |
|
---|
946 | else
|
---|
947 | {
|
---|
948 | RGBA colour;
|
---|
949 | Root::getSingleton().convertColourValue( ambient, &colour );
|
---|
950 |
|
---|
951 | vbuf->writeData(
|
---|
952 | (_index( i, j ) * vbuf->getVertexSize()) + elem->getOffset(),
|
---|
953 | sizeof(RGBA), &colour);
|
---|
954 | }
|
---|
955 |
|
---|
956 | }
|
---|
957 |
|
---|
958 | }
|
---|
959 |
|
---|
960 | printf( "." );
|
---|
961 | }
|
---|
962 | //-----------------------------------------------------------------------
|
---|
963 | Real KdTerrainRenderable::getSquaredViewDepth(const Camera* cam) const
|
---|
964 | {
|
---|
965 | Vector3 diff = mCenter - cam->getDerivedPosition();
|
---|
966 | // Use squared length to avoid square root
|
---|
967 | return diff.squaredLength();
|
---|
968 | }
|
---|
969 |
|
---|
970 | //-----------------------------------------------------------------------
|
---|
971 | const LightList& KdTerrainRenderable::getLights(void) const
|
---|
972 | {
|
---|
973 | if (mLightListDirty)
|
---|
974 | {
|
---|
975 | getParentSceneNode()->getCreator()->_populateLightList(
|
---|
976 | mCenter, this->getBoundingRadius(), mLightList);
|
---|
977 | mLightListDirty = false;
|
---|
978 | }
|
---|
979 | return mLightList;
|
---|
980 | }
|
---|
981 | //-----------------------------------------------------------------------
|
---|
982 | IndexData* KdTerrainRenderable::getIndexData(void)
|
---|
983 | {
|
---|
984 | unsigned int stitchFlags = 0;
|
---|
985 | #ifdef GTP_VISIBILITY_MODIFIED_OGRE
|
---|
986 | if ( mNeighbors[ EAST ] != 0 && mNeighbors[ EAST ] -> getRenderLevel() > getRenderLevel() )
|
---|
987 | {
|
---|
988 | stitchFlags |= STITCH_EAST;
|
---|
989 | stitchFlags |=
|
---|
990 | (mNeighbors[ EAST ] -> getRenderLevel() - getRenderLevel()) << STITCH_EAST_SHIFT;
|
---|
991 | }
|
---|
992 |
|
---|
993 | if ( mNeighbors[ WEST ] != 0 && mNeighbors[ WEST ] -> getRenderLevel() > getRenderLevel() )
|
---|
994 | {
|
---|
995 | stitchFlags |= STITCH_WEST;
|
---|
996 | stitchFlags |=
|
---|
997 | (mNeighbors[ WEST ] -> getRenderLevel() - getRenderLevel()) << STITCH_WEST_SHIFT;
|
---|
998 | }
|
---|
999 |
|
---|
1000 | if ( mNeighbors[ NORTH ] != 0 && mNeighbors[ NORTH ] -> getRenderLevel() > getRenderLevel() )
|
---|
1001 | {
|
---|
1002 | stitchFlags |= STITCH_NORTH;
|
---|
1003 | stitchFlags |=
|
---|
1004 | (mNeighbors[ NORTH ] -> getRenderLevel() - getRenderLevel()) << STITCH_NORTH_SHIFT;
|
---|
1005 | }
|
---|
1006 |
|
---|
1007 | if ( mNeighbors[ SOUTH ] != 0 && mNeighbors[ SOUTH ] -> getRenderLevel() > getRenderLevel() )
|
---|
1008 | {
|
---|
1009 | stitchFlags |= STITCH_SOUTH;
|
---|
1010 | stitchFlags |=
|
---|
1011 | (mNeighbors[ SOUTH ] -> getRenderLevel() - getRenderLevel()) << STITCH_SOUTH_SHIFT;
|
---|
1012 | }
|
---|
1013 | #else
|
---|
1014 | if ( mNeighbors[ EAST ] != 0 && mNeighbors[ EAST ] -> mRenderLevel > mRenderLevel )
|
---|
1015 | {
|
---|
1016 | stitchFlags |= STITCH_EAST;
|
---|
1017 | stitchFlags |=
|
---|
1018 | (mNeighbors[ EAST ] -> mRenderLevel - mRenderLevel) << STITCH_EAST_SHIFT;
|
---|
1019 | }
|
---|
1020 |
|
---|
1021 | if ( mNeighbors[ WEST ] != 0 && mNeighbors[ WEST ] -> mRenderLevel > mRenderLevel )
|
---|
1022 | {
|
---|
1023 | stitchFlags |= STITCH_WEST;
|
---|
1024 | stitchFlags |=
|
---|
1025 | (mNeighbors[ WEST ] -> mRenderLevel - mRenderLevel) << STITCH_WEST_SHIFT;
|
---|
1026 | }
|
---|
1027 |
|
---|
1028 | if ( mNeighbors[ NORTH ] != 0 && mNeighbors[ NORTH ] -> mRenderLevel > mRenderLevel )
|
---|
1029 | {
|
---|
1030 | stitchFlags |= STITCH_NORTH;
|
---|
1031 | stitchFlags |=
|
---|
1032 | (mNeighbors[ NORTH ] -> mRenderLevel - mRenderLevel) << STITCH_NORTH_SHIFT;
|
---|
1033 | }
|
---|
1034 |
|
---|
1035 | if ( mNeighbors[ SOUTH ] != 0 && mNeighbors[ SOUTH ] -> mRenderLevel > mRenderLevel )
|
---|
1036 | {
|
---|
1037 | stitchFlags |= STITCH_SOUTH;
|
---|
1038 | stitchFlags |=
|
---|
1039 | (mNeighbors[ SOUTH ] -> mRenderLevel - mRenderLevel) << STITCH_SOUTH_SHIFT;
|
---|
1040 | }
|
---|
1041 | #endif // GTP_VISIBILITY_MODIFIED_OGRE
|
---|
1042 | // Check preexisting
|
---|
1043 | LevelArray& levelIndex = mSceneManager->_getLevelIndex();
|
---|
1044 | /*** msz: added for v1-2-0 compatibility ***/
|
---|
1045 | #ifdef GTP_VISIBILITY_MODIFIED_OGRE
|
---|
1046 | IndexMap::iterator ii = levelIndex[ getRenderLevel() ]->find( stitchFlags );
|
---|
1047 | #else
|
---|
1048 | IndexMap::iterator ii = levelIndex[ mRenderLevel ]->find( stitchFlags );
|
---|
1049 | #endif // GTP_VISIBILITY_MODIFIED_OGRE
|
---|
1050 | IndexData* indexData;
|
---|
1051 | /*** msz: added for v1-2-0 compatibility ***/
|
---|
1052 | #ifdef GTP_VISIBILITY_MODIFIED_OGRE
|
---|
1053 | if ( ii == levelIndex[ getRenderLevel() ]->end())
|
---|
1054 | #else
|
---|
1055 | if ( ii == levelIndex[ mRenderLevel ]->end())
|
---|
1056 | #endif // GTP_VISIBILITY_MODIFIED_OGRE
|
---|
1057 | {
|
---|
1058 | // Create
|
---|
1059 | if (mOptions->useTriStrips)
|
---|
1060 | {
|
---|
1061 | indexData = generateTriStripIndexes(stitchFlags);
|
---|
1062 | }
|
---|
1063 | else
|
---|
1064 | {
|
---|
1065 | indexData = generateTriListIndexes(stitchFlags);
|
---|
1066 | }
|
---|
1067 | /*** msz: added for v1-2-0 compatibility ***/
|
---|
1068 | #ifdef GTP_VISIBILITY_MODIFIED_OGRE
|
---|
1069 | levelIndex[ getRenderLevel() ]->insert(
|
---|
1070 | IndexMap::value_type(stitchFlags, indexData));
|
---|
1071 | #else
|
---|
1072 | levelIndex[ mRenderLevel ]->insert(
|
---|
1073 | IndexMap::value_type(stitchFlags, indexData));
|
---|
1074 | #endif // GTP_VISIBILITY_MODIFIED_OGRE
|
---|
1075 | }
|
---|
1076 | else
|
---|
1077 | {
|
---|
1078 | indexData = ii->second;
|
---|
1079 | }
|
---|
1080 |
|
---|
1081 |
|
---|
1082 | return indexData;
|
---|
1083 |
|
---|
1084 |
|
---|
1085 | }
|
---|
1086 | //-----------------------------------------------------------------------
|
---|
1087 | IndexData* KdTerrainRenderable::generateTriStripIndexes(unsigned int stitchFlags)
|
---|
1088 | {
|
---|
1089 | /*** msz: added for v1-2-0 compatibility ***/
|
---|
1090 | #ifdef GTP_VISIBILITY_MODIFIED_OGRE
|
---|
1091 | // The step used for the current level
|
---|
1092 | int step = 1 << getRenderLevel();
|
---|
1093 | // The step used for the lower level
|
---|
1094 | int lowstep = 1 << (getRenderLevel() + 1);
|
---|
1095 | #else
|
---|
1096 | // The step used for the current level
|
---|
1097 | int step = 1 << mRenderLevel;
|
---|
1098 | // The step used for the lower level
|
---|
1099 | int lowstep = 1 << (mRenderLevel + 1);
|
---|
1100 | #endif // GTP_VISIBILITY_MODIFIED_OGRE
|
---|
1101 |
|
---|
1102 | int numIndexes = 0;
|
---|
1103 |
|
---|
1104 | // Calculate the number of indexes required
|
---|
1105 | // This is the number of 'cells' at this detail level x 2
|
---|
1106 | // plus 3 degenerates to turn corners
|
---|
1107 | int numTrisAcross = (((mOptions->tileSize-1) / step) * 2) + 3;
|
---|
1108 | // Num indexes is number of tris + 2
|
---|
1109 | int new_length = numTrisAcross * ((mOptions->tileSize-1) / step) + 2;
|
---|
1110 | //this is the maximum for a level. It wastes a little, but shouldn't be a problem.
|
---|
1111 |
|
---|
1112 | IndexData* indexData = new IndexData;
|
---|
1113 | indexData->indexBuffer =
|
---|
1114 | HardwareBufferManager::getSingleton().createIndexBuffer(
|
---|
1115 | HardwareIndexBuffer::IT_16BIT,
|
---|
1116 | new_length, HardwareBuffer::HBU_STATIC_WRITE_ONLY);//, false);
|
---|
1117 |
|
---|
1118 | mSceneManager->_getIndexCache().mCache.push_back( indexData );
|
---|
1119 |
|
---|
1120 | unsigned short* pIdx = static_cast<unsigned short*>(
|
---|
1121 | indexData->indexBuffer->lock(0,
|
---|
1122 | indexData->indexBuffer->getSizeInBytes(),
|
---|
1123 | HardwareBuffer::HBL_DISCARD));
|
---|
1124 |
|
---|
1125 | // Stripified mesh
|
---|
1126 | for ( uint j = 0; j < mOptions->tileSize - 1; j += step )
|
---|
1127 | {
|
---|
1128 | uint i;
|
---|
1129 | // Forward strip
|
---|
1130 | // We just do the |/ here, final | done after
|
---|
1131 | for ( i = 0; i < mOptions->tileSize - 1; i += step )
|
---|
1132 | {
|
---|
1133 | int x[4], y[4];
|
---|
1134 | x[0] = x[1] = i;
|
---|
1135 | x[2] = x[3] = i + step;
|
---|
1136 | y[0] = y[2] = j;
|
---|
1137 | y[1] = y[3] = j + step;
|
---|
1138 |
|
---|
1139 | if (j == 0 && (stitchFlags & STITCH_NORTH))
|
---|
1140 | {
|
---|
1141 | // North reduction means rounding x[0] and x[2]
|
---|
1142 | if (x[0] % lowstep != 0)
|
---|
1143 | {
|
---|
1144 | // Since we know we only drop down one level of LOD,
|
---|
1145 | // removing 1 step of higher LOD should return to lower
|
---|
1146 | x[0] -= step;
|
---|
1147 | }
|
---|
1148 | if (x[2] % lowstep != 0)
|
---|
1149 | {
|
---|
1150 | x[2] -= step;
|
---|
1151 | }
|
---|
1152 | }
|
---|
1153 |
|
---|
1154 | // Never get a south tiling on a forward strip (always finish on
|
---|
1155 | // a backward strip)
|
---|
1156 |
|
---|
1157 | if (i == 0 && (stitchFlags & STITCH_WEST))
|
---|
1158 | {
|
---|
1159 | // West reduction means rounding y[0] / y[1]
|
---|
1160 | if (y[0] % lowstep != 0)
|
---|
1161 | {
|
---|
1162 | y[0] -= step;
|
---|
1163 | }
|
---|
1164 | if (y[1] % lowstep != 0)
|
---|
1165 | {
|
---|
1166 | y[1] -= step;
|
---|
1167 | }
|
---|
1168 | }
|
---|
1169 | if (i == (mOptions->tileSize - 1 - step) && (stitchFlags & STITCH_EAST))
|
---|
1170 | {
|
---|
1171 | // East tiling means rounding y[2] & y[3]
|
---|
1172 | if (y[2] % lowstep != 0)
|
---|
1173 | {
|
---|
1174 | y[2] -= step;
|
---|
1175 | }
|
---|
1176 | if (y[3] % lowstep != 0)
|
---|
1177 | {
|
---|
1178 | y[3] -= step;
|
---|
1179 | }
|
---|
1180 | }
|
---|
1181 |
|
---|
1182 | //triangles
|
---|
1183 | if (i == 0)
|
---|
1184 | {
|
---|
1185 | // Starter
|
---|
1186 | *pIdx++ = _index( x[0], y[0] ); numIndexes++;
|
---|
1187 | }
|
---|
1188 | *pIdx++ = _index( x[1], y[1] ); numIndexes++;
|
---|
1189 | *pIdx++ = _index( x[2], y[2] ); numIndexes++;
|
---|
1190 |
|
---|
1191 | if (i == mOptions->tileSize - 1 - step)
|
---|
1192 | {
|
---|
1193 | // Emit extra index to finish row
|
---|
1194 | *pIdx++ = _index( x[3], y[3] ); numIndexes++;
|
---|
1195 | if (j < mOptions->tileSize - 1 - step)
|
---|
1196 | {
|
---|
1197 | // Emit this index twice more (this is to turn around without
|
---|
1198 | // artefacts)
|
---|
1199 | // ** Hmm, looks like we can drop this and it's unnoticeable
|
---|
1200 | //*pIdx++ = _index( x[3], y[3] ); numIndexes++;
|
---|
1201 | //*pIdx++ = _index( x[3], y[3] ); numIndexes++;
|
---|
1202 | }
|
---|
1203 | }
|
---|
1204 |
|
---|
1205 | }
|
---|
1206 | // Increment row
|
---|
1207 | j += step;
|
---|
1208 | // Backward strip
|
---|
1209 | for ( i = mOptions->tileSize - 1; i > 0 ; i -= step )
|
---|
1210 | {
|
---|
1211 | int x[4], y[4];
|
---|
1212 | x[0] = x[1] = i;
|
---|
1213 | x[2] = x[3] = i - step;
|
---|
1214 | y[0] = y[2] = j;
|
---|
1215 | y[1] = y[3] = j + step;
|
---|
1216 |
|
---|
1217 | // Never get a north tiling on a backward strip (always
|
---|
1218 | // start on a forward strip)
|
---|
1219 | if (j == (mOptions->tileSize - 1 - step) && (stitchFlags & STITCH_SOUTH))
|
---|
1220 | {
|
---|
1221 | // South reduction means rounding x[1] / x[3]
|
---|
1222 | if (x[1] % lowstep != 0)
|
---|
1223 | {
|
---|
1224 | x[1] -= step;
|
---|
1225 | }
|
---|
1226 | if (x[3] % lowstep != 0)
|
---|
1227 | {
|
---|
1228 | x[3] -= step;
|
---|
1229 | }
|
---|
1230 | }
|
---|
1231 |
|
---|
1232 | if (i == step && (stitchFlags & STITCH_WEST))
|
---|
1233 | {
|
---|
1234 | // West tiling on backward strip is rounding of y[2] / y[3]
|
---|
1235 | if (y[2] % lowstep != 0)
|
---|
1236 | {
|
---|
1237 | y[2] -= step;
|
---|
1238 | }
|
---|
1239 | if (y[3] % lowstep != 0)
|
---|
1240 | {
|
---|
1241 | y[3] -= step;
|
---|
1242 | }
|
---|
1243 | }
|
---|
1244 | if (i == mOptions->tileSize - 1 && (stitchFlags & STITCH_EAST))
|
---|
1245 | {
|
---|
1246 | // East tiling means rounding y[0] and y[1] on backward strip
|
---|
1247 | if (y[0] % lowstep != 0)
|
---|
1248 | {
|
---|
1249 | y[0] -= step;
|
---|
1250 | }
|
---|
1251 | if (y[1] % lowstep != 0)
|
---|
1252 | {
|
---|
1253 | y[1] -= step;
|
---|
1254 | }
|
---|
1255 | }
|
---|
1256 |
|
---|
1257 | //triangles
|
---|
1258 | if (i == mOptions->tileSize)
|
---|
1259 | {
|
---|
1260 | // Starter
|
---|
1261 | *pIdx++ = _index( x[0], y[0] ); numIndexes++;
|
---|
1262 | }
|
---|
1263 | *pIdx++ = _index( x[1], y[1] ); numIndexes++;
|
---|
1264 | *pIdx++ = _index( x[2], y[2] ); numIndexes++;
|
---|
1265 |
|
---|
1266 | if (i == step)
|
---|
1267 | {
|
---|
1268 | // Emit extra index to finish row
|
---|
1269 | *pIdx++ = _index( x[3], y[3] ); numIndexes++;
|
---|
1270 | if (j < mOptions->tileSize - 1 - step)
|
---|
1271 | {
|
---|
1272 | // Emit this index once more (this is to turn around)
|
---|
1273 | *pIdx++ = _index( x[3], y[3] ); numIndexes++;
|
---|
1274 | }
|
---|
1275 | }
|
---|
1276 | }
|
---|
1277 | }
|
---|
1278 |
|
---|
1279 |
|
---|
1280 | indexData->indexBuffer->unlock();
|
---|
1281 | indexData->indexCount = numIndexes;
|
---|
1282 | indexData->indexStart = 0;
|
---|
1283 |
|
---|
1284 | return indexData;
|
---|
1285 |
|
---|
1286 | }
|
---|
1287 | //-----------------------------------------------------------------------
|
---|
1288 | IndexData* KdTerrainRenderable::generateTriListIndexes(unsigned int stitchFlags)
|
---|
1289 | {
|
---|
1290 |
|
---|
1291 | int numIndexes = 0;
|
---|
1292 | /*** msz: added for v1-2-0 compatibility ***/
|
---|
1293 | #ifdef GTP_VISIBILITY_MODIFIED_OGRE
|
---|
1294 | int step = 1 << getRenderLevel();
|
---|
1295 | #else
|
---|
1296 | int step = 1 << mRenderLevel;
|
---|
1297 | #endif // GTP_VISIBILITY_MODIFIED_OGRE
|
---|
1298 | IndexData* indexData = 0;
|
---|
1299 |
|
---|
1300 | int north = stitchFlags & STITCH_NORTH ? step : 0;
|
---|
1301 | int south = stitchFlags & STITCH_SOUTH ? step : 0;
|
---|
1302 | int east = stitchFlags & STITCH_EAST ? step : 0;
|
---|
1303 | int west = stitchFlags & STITCH_WEST ? step : 0;
|
---|
1304 |
|
---|
1305 | int new_length = ( mOptions->tileSize / step ) * ( mOptions->tileSize / step ) * 2 * 2 * 2 ;
|
---|
1306 | //this is the maximum for a level. It wastes a little, but shouldn't be a problem.
|
---|
1307 |
|
---|
1308 | indexData = new IndexData;
|
---|
1309 | indexData->indexBuffer =
|
---|
1310 | HardwareBufferManager::getSingleton().createIndexBuffer(
|
---|
1311 | HardwareIndexBuffer::IT_16BIT,
|
---|
1312 | new_length, HardwareBuffer::HBU_STATIC_WRITE_ONLY);//, false);
|
---|
1313 |
|
---|
1314 | mSceneManager->_getIndexCache().mCache.push_back( indexData );
|
---|
1315 |
|
---|
1316 | unsigned short* pIdx = static_cast<unsigned short*>(
|
---|
1317 | indexData->indexBuffer->lock(0,
|
---|
1318 | indexData->indexBuffer->getSizeInBytes(),
|
---|
1319 | HardwareBuffer::HBL_DISCARD));
|
---|
1320 |
|
---|
1321 | // Do the core vertices, minus stitches
|
---|
1322 | for ( uint j = north; j < mOptions->tileSize - 1 - south; j += step )
|
---|
1323 | {
|
---|
1324 | for ( uint i = west; i < mOptions->tileSize - 1 - east; i += step )
|
---|
1325 | {
|
---|
1326 | //triangles
|
---|
1327 | *pIdx++ = _index( i, j ); numIndexes++;
|
---|
1328 | *pIdx++ = _index( i, j + step ); numIndexes++;
|
---|
1329 | *pIdx++ = _index( i + step, j ); numIndexes++;
|
---|
1330 |
|
---|
1331 | *pIdx++ = _index( i, j + step ); numIndexes++;
|
---|
1332 | *pIdx++ = _index( i + step, j + step ); numIndexes++;
|
---|
1333 | *pIdx++ = _index( i + step, j ); numIndexes++;
|
---|
1334 | }
|
---|
1335 | }
|
---|
1336 |
|
---|
1337 | // North stitching
|
---|
1338 | if ( north > 0 )
|
---|
1339 | {
|
---|
1340 | /*** msz: added for v1-2-0 compatibility ***/
|
---|
1341 | #ifdef GTP_VISIBILITY_MODIFIED_OGRE
|
---|
1342 | numIndexes += stitchEdge(NORTH, getRenderLevel(), mNeighbors[NORTH]->getRenderLevel(),
|
---|
1343 | west > 0, east > 0, &pIdx);
|
---|
1344 | #else
|
---|
1345 | numIndexes += stitchEdge(NORTH, mRenderLevel, mNeighbors[NORTH]->mRenderLevel,
|
---|
1346 | west > 0, east > 0, &pIdx);
|
---|
1347 | #endif // GTP_VISIBILITY_MODIFIED_OGRE
|
---|
1348 | }
|
---|
1349 | // East stitching
|
---|
1350 | if ( east > 0 )
|
---|
1351 | {
|
---|
1352 | /*** msz: added for v1-2-0 compatibility ***/
|
---|
1353 | #ifdef GTP_VISIBILITY_MODIFIED_OGRE
|
---|
1354 | numIndexes += stitchEdge(EAST, getRenderLevel(), mNeighbors[EAST]->getRenderLevel(),
|
---|
1355 | north > 0, south > 0, &pIdx);
|
---|
1356 | #else
|
---|
1357 | numIndexes += stitchEdge(EAST, mRenderLevel, mNeighbors[EAST]->mRenderLevel,
|
---|
1358 | north > 0, south > 0, &pIdx);
|
---|
1359 | #endif // GTP_VISIBILITY_MODIFIED_OGRE
|
---|
1360 | }
|
---|
1361 | // South stitching
|
---|
1362 | if ( south > 0 )
|
---|
1363 | {
|
---|
1364 | /*** msz: added for v1-2-0 compatibility ***/
|
---|
1365 | #ifdef GTP_VISIBILITY_MODIFIED_OGRE
|
---|
1366 | numIndexes += stitchEdge(SOUTH, getRenderLevel(), mNeighbors[SOUTH]->getRenderLevel(),
|
---|
1367 | east > 0, west > 0, &pIdx);
|
---|
1368 | #else
|
---|
1369 | numIndexes += stitchEdge(SOUTH, mRenderLevel, mNeighbors[SOUTH]->mRenderLevel,
|
---|
1370 | east > 0, west > 0, &pIdx);
|
---|
1371 | #endif // GTP_VISIBILITY_MODIFIED_OGRE
|
---|
1372 | }
|
---|
1373 | // West stitching
|
---|
1374 | if ( west > 0 )
|
---|
1375 | {
|
---|
1376 | /*** msz: added for v1-2-0 compatibility ***/
|
---|
1377 | #ifdef GTP_VISIBILITY_MODIFIED_OGRE
|
---|
1378 | numIndexes += stitchEdge(WEST, getRenderLevel(), mNeighbors[WEST]->getRenderLevel(),
|
---|
1379 | south > 0, north > 0, &pIdx);
|
---|
1380 | #else
|
---|
1381 | numIndexes += stitchEdge(WEST, mRenderLevel, mNeighbors[WEST]->mRenderLevel,
|
---|
1382 | south > 0, north > 0, &pIdx);
|
---|
1383 | #endif // GTP_VISIBILITY_MODIFIED_OGRE
|
---|
1384 | }
|
---|
1385 |
|
---|
1386 |
|
---|
1387 | indexData->indexBuffer->unlock();
|
---|
1388 | indexData->indexCount = numIndexes;
|
---|
1389 | indexData->indexStart = 0;
|
---|
1390 |
|
---|
1391 | return indexData;
|
---|
1392 | }
|
---|
1393 | //-----------------------------------------------------------------------
|
---|
1394 | HardwareVertexBufferSharedPtr KdTerrainRenderable::createDeltaBuffer(void)
|
---|
1395 | {
|
---|
1396 | // Delta buffer is a 1D float buffer of height offsets
|
---|
1397 | HardwareVertexBufferSharedPtr buf =
|
---|
1398 | HardwareBufferManager::getSingleton().createVertexBuffer(
|
---|
1399 | VertexElement::getTypeSize(VET_FLOAT1),
|
---|
1400 | mOptions->tileSize * mOptions->tileSize,
|
---|
1401 | HardwareBuffer::HBU_STATIC_WRITE_ONLY);
|
---|
1402 | // Fill the buffer with zeros, we will only fill in delta
|
---|
1403 | void* pVoid = buf->lock(HardwareBuffer::HBL_DISCARD);
|
---|
1404 | memset(pVoid, 0, mOptions->tileSize * mOptions->tileSize * sizeof(float));
|
---|
1405 | buf->unlock();
|
---|
1406 |
|
---|
1407 | return buf;
|
---|
1408 |
|
---|
1409 | }
|
---|
1410 | //-----------------------------------------------------------------------
|
---|
1411 | void KdTerrainRenderable::_updateCustomGpuParameter(
|
---|
1412 | const GpuProgramParameters::AutoConstantEntry& constantEntry,
|
---|
1413 | GpuProgramParameters* params) const
|
---|
1414 | {
|
---|
1415 | if (constantEntry.data == MORPH_CUSTOM_PARAM_ID)
|
---|
1416 | {
|
---|
1417 | // Update morph LOD factor
|
---|
1418 | params->setConstant(constantEntry.index, mLODMorphFactor);
|
---|
1419 | }
|
---|
1420 | else
|
---|
1421 | {
|
---|
1422 | Renderable::_updateCustomGpuParameter(constantEntry, params);
|
---|
1423 | }
|
---|
1424 |
|
---|
1425 | }
|
---|
1426 | //-----------------------------------------------------------------------
|
---|
1427 | int KdTerrainRenderable::stitchEdge(Neighbor neighbor, int hiLOD, int loLOD,
|
---|
1428 | bool omitFirstTri, bool omitLastTri, unsigned short** ppIdx)
|
---|
1429 | {
|
---|
1430 | assert(loLOD > hiLOD);
|
---|
1431 | /*
|
---|
1432 | Now do the stitching; we can stitch from any level to any level.
|
---|
1433 | The stitch pattern is like this for each pair of vertices in the lower LOD
|
---|
1434 | (excuse the poor ascii art):
|
---|
1435 |
|
---|
1436 | lower LOD
|
---|
1437 | *-----------*
|
---|
1438 | |\ \ 3 / /|
|
---|
1439 | |1\2 \ / 4/5|
|
---|
1440 | *--*--*--*--*
|
---|
1441 | higher LOD
|
---|
1442 |
|
---|
1443 | The algorithm is, for each pair of lower LOD vertices:
|
---|
1444 | 1. Iterate over the higher LOD vertices, generating tris connected to the
|
---|
1445 | first lower LOD vertex, up to and including 1/2 the span of the lower LOD
|
---|
1446 | over the higher LOD (tris 1-2). Skip the first tri if it is on the edge
|
---|
1447 | of the tile and that edge is to be stitched itself.
|
---|
1448 | 2. Generate a single tri for the middle using the 2 lower LOD vertices and
|
---|
1449 | the middle vertex of the higher LOD (tri 3).
|
---|
1450 | 3. Iterate over the higher LOD vertices from 1/2 the span of the lower LOD
|
---|
1451 | to the end, generating tris connected to the second lower LOD vertex
|
---|
1452 | (tris 4-5). Skip the last tri if it is on the edge of a tile and that
|
---|
1453 | edge is to be stitched itself.
|
---|
1454 |
|
---|
1455 | The same algorithm works for all edges of the patch; stitching is done
|
---|
1456 | clockwise so that the origin and steps used change, but the general
|
---|
1457 | approach does not.
|
---|
1458 | */
|
---|
1459 |
|
---|
1460 | // Get pointer to be updated
|
---|
1461 | unsigned short* pIdx = *ppIdx;
|
---|
1462 |
|
---|
1463 | // Work out the steps ie how to increment indexes
|
---|
1464 | // Step from one vertex to another in the high detail version
|
---|
1465 | int step = 1 << hiLOD;
|
---|
1466 | // Step from one vertex to another in the low detail version
|
---|
1467 | int superstep = 1 << loLOD;
|
---|
1468 | // Step half way between low detail steps
|
---|
1469 | int halfsuperstep = superstep >> 1;
|
---|
1470 |
|
---|
1471 | // Work out the starting points and sign of increments
|
---|
1472 | // We always work the strip clockwise
|
---|
1473 | int startx, starty, endx, rowstep;
|
---|
1474 | bool horizontal;
|
---|
1475 | switch(neighbor)
|
---|
1476 | {
|
---|
1477 | case NORTH:
|
---|
1478 | startx = starty = 0;
|
---|
1479 | endx = mOptions->tileSize - 1;
|
---|
1480 | rowstep = step;
|
---|
1481 | horizontal = true;
|
---|
1482 | break;
|
---|
1483 | case SOUTH:
|
---|
1484 | // invert x AND y direction, helps to keep same winding
|
---|
1485 | startx = starty = mOptions->tileSize - 1;
|
---|
1486 | endx = 0;
|
---|
1487 | rowstep = -step;
|
---|
1488 | step = -step;
|
---|
1489 | superstep = -superstep;
|
---|
1490 | halfsuperstep = -halfsuperstep;
|
---|
1491 | horizontal = true;
|
---|
1492 | break;
|
---|
1493 | case EAST:
|
---|
1494 | startx = 0;
|
---|
1495 | endx = mOptions->tileSize - 1;
|
---|
1496 | starty = mOptions->tileSize - 1;
|
---|
1497 | rowstep = -step;
|
---|
1498 | horizontal = false;
|
---|
1499 | break;
|
---|
1500 | case WEST:
|
---|
1501 | startx = mOptions->tileSize - 1;
|
---|
1502 | endx = 0;
|
---|
1503 | starty = 0;
|
---|
1504 | rowstep = step;
|
---|
1505 | step = -step;
|
---|
1506 | superstep = -superstep;
|
---|
1507 | halfsuperstep = -halfsuperstep;
|
---|
1508 | horizontal = false;
|
---|
1509 | break;
|
---|
1510 | };
|
---|
1511 |
|
---|
1512 | int numIndexes = 0;
|
---|
1513 |
|
---|
1514 | for ( int j = startx; j != endx; j += superstep )
|
---|
1515 | {
|
---|
1516 | int k;
|
---|
1517 | for (k = 0; k != halfsuperstep; k += step)
|
---|
1518 | {
|
---|
1519 | int jk = j + k;
|
---|
1520 | //skip the first bit of the corner?
|
---|
1521 | if ( j != startx || k != 0 || !omitFirstTri )
|
---|
1522 | {
|
---|
1523 | if (horizontal)
|
---|
1524 | {
|
---|
1525 | *pIdx++ = _index( j , starty ); numIndexes++;
|
---|
1526 | *pIdx++ = _index( jk, starty + rowstep ); numIndexes++;
|
---|
1527 | *pIdx++ = _index( jk + step, starty + rowstep ); numIndexes++;
|
---|
1528 | }
|
---|
1529 | else
|
---|
1530 | {
|
---|
1531 | *pIdx++ = _index( starty, j ); numIndexes++;
|
---|
1532 | *pIdx++ = _index( starty + rowstep, jk ); numIndexes++;
|
---|
1533 | *pIdx++ = _index( starty + rowstep, jk + step); numIndexes++;
|
---|
1534 | }
|
---|
1535 | }
|
---|
1536 | }
|
---|
1537 |
|
---|
1538 | // Middle tri
|
---|
1539 | if (horizontal)
|
---|
1540 | {
|
---|
1541 | *pIdx++ = _index( j, starty ); numIndexes++;
|
---|
1542 | *pIdx++ = _index( j + halfsuperstep, starty + rowstep); numIndexes++;
|
---|
1543 | *pIdx++ = _index( j + superstep, starty ); numIndexes++;
|
---|
1544 | }
|
---|
1545 | else
|
---|
1546 | {
|
---|
1547 | *pIdx++ = _index( starty, j ); numIndexes++;
|
---|
1548 | *pIdx++ = _index( starty + rowstep, j + halfsuperstep ); numIndexes++;
|
---|
1549 | *pIdx++ = _index( starty, j + superstep ); numIndexes++;
|
---|
1550 | }
|
---|
1551 |
|
---|
1552 | for (k = halfsuperstep; k != superstep; k += step)
|
---|
1553 | {
|
---|
1554 | int jk = j + k;
|
---|
1555 | if ( j != endx - superstep || k != superstep - step || !omitLastTri )
|
---|
1556 | {
|
---|
1557 | if (horizontal)
|
---|
1558 | {
|
---|
1559 | *pIdx++ = _index( j + superstep, starty ); numIndexes++;
|
---|
1560 | *pIdx++ = _index( jk, starty + rowstep ); numIndexes++;
|
---|
1561 | *pIdx++ = _index( jk + step, starty + rowstep ); numIndexes++;
|
---|
1562 | }
|
---|
1563 | else
|
---|
1564 | {
|
---|
1565 | *pIdx++ = _index( starty, j + superstep ); numIndexes++;
|
---|
1566 | *pIdx++ = _index( starty + rowstep, jk ); numIndexes++;
|
---|
1567 | *pIdx++ = _index( starty + rowstep, jk + step ); numIndexes++;
|
---|
1568 | }
|
---|
1569 | }
|
---|
1570 | }
|
---|
1571 | }
|
---|
1572 |
|
---|
1573 | *ppIdx = pIdx;
|
---|
1574 |
|
---|
1575 | return numIndexes;
|
---|
1576 |
|
---|
1577 | }
|
---|
1578 |
|
---|
1579 | #ifdef GTP_VISIBILITY_MODIFIED_OGRE
|
---|
1580 | //-----------------------------------------------------------------------
|
---|
1581 | void KdTerrainRenderable::ResetRenderLevelIndex()
|
---|
1582 | {
|
---|
1583 | msCurrentRenderLevelIndex = 0;
|
---|
1584 | }
|
---|
1585 | //-----------------------------------------------------------------------
|
---|
1586 | void KdTerrainRenderable::NextRenderLevelIndex()
|
---|
1587 | {
|
---|
1588 | if ((++ msCurrentRenderLevelIndex) > MAX_RENDERLEVEL_INDEX)
|
---|
1589 | msCurrentRenderLevelIndex = 0;
|
---|
1590 | }
|
---|
1591 | #endif // GTP_VISIBILITY_MODIFIED_OGRE
|
---|
1592 |
|
---|
1593 | } //namespace
|
---|