source: GTP/trunk/Lib/Vis/OnlineCullingCHC/OGRE/src/OgreOctreeHierarchyInterface.cpp @ 2281

Revision 2281, 10.6 KB checked in by mattausch, 17 years ago (diff)
Line 
1#include "OgreOctreeHierarchyInterface.h"
2//#include "OgreVisibilityOctreeSceneManager.h"
3#include <OgreOctree.h>
4#include <OgreLogManager.h>
5#include <OgreStringConverter.h>
6
7
8namespace Ogre {
9
10//-----------------------------------------------------------------------
11OctreeHierarchyInterface::OctreeHierarchyInterface(OctreeSceneManager *sm,
12                                                                                                   RenderSystem *rsys):
13SceneNodeHierarchyInterface(sm, rsys)
14{}
15//-----------------------------------------------------------------------
16void OctreeHierarchyInterface::TraverseNode(GtpVisibility::HierarchyNode *node)
17{
18        ++ mNumTraversedNodes;
19
20        Octree *octree = static_cast<Octree *>(node);
21
22        // if we come across some renderable geometry => render it
23        if (!octree->mNodes.empty())
24        {
25                RenderNode(node);
26        }
27       
28       
29        // if not all subtrees are empty
30        if (!IsLeaf(node))
31        {
32                Octree *nextChild;
33
34                if ((nextChild = octree->mChildren[0][0][0]) != NULL)
35                        mDistanceQueue->push(nextChild);
36                if ((nextChild = octree->mChildren[0][0][1]) != NULL)
37                        mDistanceQueue->push(nextChild);
38                if ((nextChild = octree->mChildren[0][1][0]) != NULL)
39                        mDistanceQueue->push(nextChild);
40                if ((nextChild = octree->mChildren[0][1][1]) != NULL)
41                mDistanceQueue->push(nextChild);
42                if ((nextChild = octree->mChildren[1][0][0]) != NULL)
43                        mDistanceQueue->push(nextChild);
44                if ((nextChild = octree->mChildren[1][0][1]) != NULL)
45                        mDistanceQueue->push(nextChild);
46                if ((nextChild = octree->mChildren[1][1][0]) != NULL)
47                        mDistanceQueue->push(nextChild);
48                if ((nextChild = octree->mChildren[1][1][1]) != NULL)
49                        mDistanceQueue->push(nextChild);
50        }
51}
52//-----------------------------------------------------------------------
53GtpVisibility::HierarchyNode *OctreeHierarchyInterface::GetRandomLeaf(GtpVisibility::HierarchyNode *root)
54{
55        if (IsLeaf(root))
56                return root;
57
58        Octree *octree = static_cast<Octree *>(root);
59
60        // random decision
61        Octree *child = NULL;
62       
63        std::vector<Octree *> nodes;
64
65        //LogManager::getSingleton().logMessage("***");
66        for (int i = 0; i < 8; ++ i)
67        {
68                int x = (i & 4) / 4;
69                int y = (i & 2) / 2;
70                int z = i & 1;
71       
72                if ((child = octree->mChildren[x][y][z]) != NULL)
73                {
74                        nodes.push_back(child);
75                }
76        }
77
78        if (nodes.empty())
79                return NULL;
80
81        int r = (int) (rand() * (float)nodes.size());
82
83        return GetRandomLeaf(nodes[r]);
84        // assume that at least one child is not NULL ...
85        /*while (!child)
86        {
87                int mask = (int) (rand() * 8.0f);
88                child = octree->mChildren[(mask & 4) / 4][(mask & 2) / 2][mask & 1];
89        }
90
91        return GetRandomLeaf(child);*/
92}
93//-----------------------------------------------------------------------
94void OctreeHierarchyInterface::TraverseNode2(GtpVisibility::HierarchyNode *node)
95{
96        ++ mNumTraversedNodes;
97
98        Octree *octree = static_cast<Octree *>(node);
99
100        // if we come across some renderable geometry => render it
101        if (!octree->mNodes.empty())
102        {
103                // render everything from here
104                if (octree->isOctreeFullyVisible())
105                {               
106                        RenderNodeRecursive(node);
107                        return;
108                }
109
110                RenderNode(node);
111        }
112               
113        // if not all subtrees are empty
114        if (!IsLeaf(node))
115        {
116                Octree *nextChild;
117
118                if ((nextChild = octree->mChildren[0][0][0]) != NULL)
119                        mDistanceQueue->push(nextChild);
120                if ((nextChild = octree->mChildren[0][0][1]) != NULL)
121                        mDistanceQueue->push(nextChild);
122                if ((nextChild = octree->mChildren[0][1][0]) != NULL)
123                        mDistanceQueue->push(nextChild);
124                if ((nextChild = octree->mChildren[0][1][1]) != NULL)
125                mDistanceQueue->push(nextChild);
126                if ((nextChild = octree->mChildren[1][0][0]) != NULL)
127                        mDistanceQueue->push(nextChild);
128                if ((nextChild = octree->mChildren[1][0][1]) != NULL)
129                        mDistanceQueue->push(nextChild);
130                if ((nextChild = octree->mChildren[1][1][0]) != NULL)
131                        mDistanceQueue->push(nextChild);
132                if ((nextChild = octree->mChildren[1][1][1]) != NULL)
133                        mDistanceQueue->push(nextChild);
134        }
135}
136//-----------------------------------------------------------------------
137bool OctreeHierarchyInterface::IsLeaf(GtpVisibility::HierarchyNode *node) const
138{
139        Octree *octree = static_cast<Octree *>(node);
140
141        // HACK: if there are subtrees, they are empty => we are not interested in them
142        return octree->numNodes() == (int)octree->mNodes.size();
143}
144//-----------------------------------------------------------------------
145bool OctreeHierarchyInterface::HasGeometry(GtpVisibility::HierarchyNode *node) const
146{
147        return !(static_cast<Octree *>(node))->mNodes.empty();
148}
149//-----------------------------------------------------------------------
150float OctreeHierarchyInterface::GetSquaredDistance(GtpVisibility::HierarchyNode *node) const
151{
152        const Vector3 bmin = static_cast<Octree *>(node)->mBox.getMinimum();
153        const Vector3 bmax = static_cast<Octree *>(node)->mBox.getMaximum();
154
155        const Vector3 pos = (bmax - bmin) * 0.5 + bmin;
156       
157/*      std::stringstream d;
158        d << "a: " << (mCameraPosition - pos).squaredLength()
159          << " b: " << (mCullCamera->getDerivedPosition() - pos).squaredLength();
160        LogManager::getSingleton().logMessage(d.str());*/
161        return (mCameraPosition - pos).squaredLength();
162}
163//-----------------------------------------------------------------------
164void OctreeHierarchyInterface::SetNodeVisible(GtpVisibility::HierarchyNode *node,
165                                                                                          const bool visible) const
166{
167#ifdef GTP_VISIBILITY_MODIFIED_OGRE
168        static_cast<Octree *>(node)->setOctreeVisible(visible);
169#endif
170}
171//-----------------------------------------------------------------------
172void OctreeHierarchyInterface::SetLastVisited(GtpVisibility::HierarchyNode *node,
173                                                                                          const unsigned int frameId) const
174{
175#ifdef GTP_VISIBILITY_MODIFIED_OGRE
176        static_cast<Octree *>(node)->setLastVisited(frameId);
177#endif
178}
179//-----------------------------------------------------------------------
180void OctreeHierarchyInterface::PullUpVisibility(GtpVisibility::HierarchyNode *node) const
181{               
182#ifdef GTP_VISIBILITY_MODIFIED_OGRE
183        Octree *octant = static_cast<Octree *>(node);
184
185        while (octant && !octant->isOctreeVisible())
186        {
187                octant->setOctreeVisible(true);
188                octant = octant->getParent();
189        }
190#endif
191}
192//-----------------------------------------------------------------------
193void OctreeHierarchyInterface::DetermineFullVisibility(GtpVisibility::HierarchyNode *node) const
194{               
195        Octree *octant = static_cast<Octree *>(node);
196
197        // leaf node: terminate recursion
198        if (IsLeaf(node))
199        {
200                octant->setOctreeFullyVisible(octant->isOctreeVisible());
201                       
202                return;
203        }
204
205        octant->setOctreeFullyVisible(true);
206       
207        Octree *nextChild;
208        //LogManager::getSingleton().logMessage("***");
209        for (int i = 0; i < 8; ++ i)
210        {
211                int x = (i & 4) / 4;
212                int y = (i & 2) / 2;
213                int z = i & 1;
214                Ogre::LogManager::getSingleton().logMessage("y");
215                //std::stringstream d; d << "x " << x << " y " << y << " z " << z;
216                //LogManager::getSingleton().logMessage(d.str());
217
218                if ((nextChild = octant->mChildren[x][y][z]) != NULL)
219                {
220                        DetermineFullVisibility(nextChild);
221                        // this leaf is not fully visible => break
222                        if (!nextChild->isOctreeFullyVisible())
223                                octant->setOctreeFullyVisible(false);
224                }
225        }
226}
227//-----------------------------------------------------------------------
228void OctreeHierarchyInterface::RenderNode(GtpVisibility::HierarchyNode *node)
229{
230#ifdef GTP_VISIBILITY_MODIFIED_OGRE
231        Octree *octant = static_cast<Octree *>(node);
232
233        if (octant->lastRendered() != mFrameId)
234        {
235                octant->setLastRendered(mFrameId);
236                OctreeSceneManager *ocm =
237                        static_cast<OctreeSceneManager *>(mSceneManager);
238
239                ocm->_renderOctant(mCamera,
240                                                   octant,
241                                                   mOnlyShadowCasters,
242                                                   mLeavePassesInQueue);
243
244                mVisibleNodes.push_back(node);
245        }
246#endif 
247}
248//-----------------------------------------------------------------------
249void OctreeHierarchyInterface::RenderNodeRecursive(GtpVisibility::HierarchyNode *node)
250{
251#ifdef GTP_VISIBILITY_MODIFIED_OGRE
252        Octree *octant = static_cast<Octree *>(node);
253
254        if (octant->lastRendered() != mFrameId)
255        {
256                octant->setLastRendered(mFrameId);
257                OctreeSceneManager *ocm =
258                        static_cast<OctreeSceneManager *>(mSceneManager);
259
260                ocm->_renderOctantRecursive(mCamera,
261                                                                        octant,
262                                                                        mOnlyShadowCasters,
263                                                                        mLeavePassesInQueue);
264
265                mVisibleNodes.push_back(node);
266        }
267#endif 
268}
269//-----------------------------------------------------------------------
270bool OctreeHierarchyInterface::IsNodeVisible(GtpVisibility::HierarchyNode *node) const
271{
272#ifdef GTP_VISIBILITY_MODIFIED_OGRE
273        return static_cast<Octree *>(node)->isOctreeVisible();
274#else
275        return true;
276#endif
277}
278//-----------------------------------------------------------------------
279bool OctreeHierarchyInterface::IsNodeFullyVisible(GtpVisibility::HierarchyNode *node) const
280{
281#ifdef GTP_VISIBILITY_MODIFIED_OGRE
282        return static_cast<Octree *>(node)->isOctreeFullyVisible();
283#else
284        return true;
285#endif
286}
287//-----------------------------------------------------------------------
288unsigned int OctreeHierarchyInterface::LastVisited(GtpVisibility::HierarchyNode *node) const
289{
290#ifdef GTP_VISIBILITY_MODIFIED_OGRE
291        return static_cast<Octree *>(node)->lastVisited();
292#else
293        return 0;
294#endif
295}
296//-----------------------------------------------------------------------
297AxisAlignedBox *OctreeHierarchyInterface::GetBoundingBox(GtpVisibility::HierarchyNode *node)
298{
299        // reuse box if node is the same
300        // only create renderable bounding box for new node
301        if (node != mSavedNode)
302        {
303                mSavedNode = node;
304            //static_cast<Octree *>(node)->_getCullBounds(&mBox);
305                mBox = static_cast<Octree *>(node)->_getWorldAABB();
306        }
307
308        return &mBox;
309}
310//-----------------------------------------------------------------------
311void OctreeHierarchyInterface::VisualizeCulledNode(GtpVisibility::HierarchyNode *node,
312                                                                                                   GtpVisibility::CullingType type) const
313{
314        WireBoundingBox *box = static_cast<Octree *>(node)->getWireBoundingBox();
315
316        if (type == GtpVisibility::FRUSTUM_CULLED)
317        {
318                box->setMaterial("FrustumCulledNodesMaterial");
319        }
320        else // type == GtpVisibility::QUERY_CULLED
321        {
322                box->setMaterial("QueryCulledNodesMaterial");
323        }
324
325        static_cast<OctreeSceneManager *>(mSceneManager)->getBoxes()->push_back(box);
326}
327//-----------------------------------------------------------------------
328void OctreeHierarchyInterface::GetNodeGeometryList(GtpVisibility::HierarchyNode *node,
329                                                                                                   GeometryVector *geometryList,
330                                                                                                   bool includeChildren)
331{
332        NodeList::const_iterator nodeIt, nodeIt_end;
333        nodeIt_end = static_cast<Octree *>(node)->mNodes.end();
334
335        for (nodeIt = static_cast<Octree *>(node)->mNodes.begin(); nodeIt != nodeIt_end; ++nodeIt)
336        {
337                SceneNodeHierarchyInterface::GetNodeGeometryList(*nodeIt, geometryList, includeChildren);
338        }
339}
340
341
342} // namespace Ogre
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