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1 | // Created on: 2014-03-31 |
2 | // Created by: Danila ULYANOV |
3 | // Copyright (c) 2014 OPEN CASCADE SAS |
4 | // |
5 | // This file is part of Open CASCADE Technology software library. |
6 | // |
0a36ca0a |
7 | // This library is free software; you can redistribute it and/or modify it under |
8 | // the terms of the GNU Lesser General Public License version 2.1 as published |
c5751993 |
9 | // by the Free Software Foundation, with special exception defined in the file |
10 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
11 | // distribution for complete text of the license and disclaimer of any warranty. |
12 | // |
13 | // Alternatively, this file may be used under the terms of Open CASCADE |
14 | // commercial license or contractual agreement. |
15 | |
16 | #include <OpenGl_Layer.hxx> |
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17 | |
18 | #include <OpenGl_BVHTreeSelector.hxx> |
19 | #include <OpenGl_Structure.hxx> |
20 | #include <OpenGl_View.hxx> |
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21 | #include <OpenGl_Workspace.hxx> |
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22 | |
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23 | // ======================================================================= |
24 | // function : OpenGl_PriorityList |
25 | // purpose : |
26 | // ======================================================================= |
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27 | OpenGl_Layer::OpenGl_Layer (const Standard_Integer theNbPriorities) |
a1954302 |
28 | : myArray (0, theNbPriorities - 1), |
29 | myNbStructures (0), |
30 | myBVHIsLeftChildQueuedFirst (Standard_True), |
31 | myIsBVHPrimitivesNeedsReset (Standard_False) |
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32 | { |
33 | // |
34 | } |
35 | |
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36 | // ======================================================================= |
37 | // function : ~OpenGl_Layer |
38 | // purpose : |
39 | // ======================================================================= |
40 | OpenGl_Layer::~OpenGl_Layer() |
41 | { |
42 | // |
43 | } |
44 | |
45 | // ======================================================================= |
46 | // function : Add |
47 | // purpose : |
48 | // ======================================================================= |
49 | void OpenGl_Layer::Add (const OpenGl_Structure* theStruct, |
50 | const Standard_Integer thePriority, |
51 | Standard_Boolean isForChangePriority) |
52 | { |
53 | const Standard_Integer anIndex = Min (Max (thePriority, 0), myArray.Length() - 1); |
54 | if (theStruct == NULL) |
55 | { |
56 | return; |
57 | } |
58 | |
59 | myArray (anIndex).Append (theStruct); |
60 | if (theStruct->IsAlwaysRendered()) |
61 | { |
62 | theStruct->MarkAsNotCulled(); |
63 | } |
64 | else if (!isForChangePriority) |
65 | { |
66 | myBVHPrimitives.Add (theStruct); |
67 | } |
68 | ++myNbStructures; |
69 | } |
70 | |
71 | // ======================================================================= |
72 | // function : Remove |
73 | // purpose : |
74 | // ======================================================================= |
75 | bool OpenGl_Layer::Remove (const OpenGl_Structure* theStruct, |
76 | Standard_Integer& thePriority, |
77 | Standard_Boolean isForChangePriority) |
78 | { |
79 | if (theStruct == NULL) |
80 | { |
81 | thePriority = -1; |
82 | return false; |
83 | } |
84 | |
85 | const Standard_Integer aNbPriorities = myArray.Length(); |
86 | for (Standard_Integer aPriorityIter = 0; aPriorityIter < aNbPriorities; ++aPriorityIter) |
87 | { |
88 | OpenGl_SequenceOfStructure& aSeq = myArray (aPriorityIter); |
89 | for (OpenGl_SequenceOfStructure::Iterator aStructIter (aSeq); aStructIter.More(); aStructIter.Next()) |
90 | { |
91 | if (aStructIter.Value() == theStruct) |
92 | { |
93 | aSeq.Remove (aStructIter); |
94 | if (!theStruct->IsAlwaysRendered() |
95 | && !isForChangePriority) |
96 | { |
97 | myBVHPrimitives.Remove (theStruct); |
98 | } |
99 | --myNbStructures; |
100 | thePriority = aPriorityIter; |
101 | return true; |
102 | } |
103 | } |
104 | } |
105 | |
106 | thePriority = -1; |
107 | return false; |
108 | } |
109 | |
110 | // ======================================================================= |
111 | // function : InvalidateBVHData |
112 | // purpose : |
113 | // ======================================================================= |
114 | void OpenGl_Layer::InvalidateBVHData() |
115 | { |
116 | myIsBVHPrimitivesNeedsReset = Standard_True; |
117 | } |
118 | |
119 | // ======================================================================= |
120 | // function : renderAll |
121 | // purpose : |
122 | // ======================================================================= |
123 | void OpenGl_Layer::renderAll (const Handle(OpenGl_Workspace)& theWorkspace) const |
124 | { |
125 | const Standard_Integer aNbPriorities = myArray.Length(); |
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126 | const Standard_Integer aViewId = theWorkspace->ActiveViewId(); |
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127 | for (Standard_Integer aPriorityIter = 0; aPriorityIter < aNbPriorities; ++aPriorityIter) |
128 | { |
129 | for (OpenGl_SequenceOfStructure::Iterator aStructIter (myArray (aPriorityIter)); aStructIter.More(); aStructIter.Next()) |
130 | { |
131 | const OpenGl_Structure* aStruct = aStructIter.Value(); |
132 | if (!aStruct->IsVisible()) |
133 | { |
134 | continue; |
135 | } |
a272ed94 |
136 | else if (!aStruct->ViewAffinity.IsNull() |
137 | && !aStruct->ViewAffinity->IsVisible (aViewId)) |
138 | { |
139 | continue; |
140 | } |
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141 | |
142 | aStruct->Render (theWorkspace); |
143 | } |
144 | } |
145 | } |
146 | |
147 | // ======================================================================= |
148 | // function : renderTraverse |
149 | // purpose : |
150 | // ======================================================================= |
151 | void OpenGl_Layer::renderTraverse (const Handle(OpenGl_Workspace)& theWorkspace) const |
152 | { |
153 | if (myIsBVHPrimitivesNeedsReset) |
154 | { |
155 | myBVHPrimitives.Assign (myArray); |
156 | myIsBVHPrimitivesNeedsReset = Standard_False; |
157 | } |
158 | |
159 | OpenGl_BVHTreeSelector& aSelector = theWorkspace->ActiveView()->BVHTreeSelector(); |
160 | traverse (aSelector); |
161 | |
162 | const Standard_Integer aNbPriorities = myArray.Length(); |
a272ed94 |
163 | const Standard_Integer aViewId = theWorkspace->ActiveViewId(); |
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164 | for (Standard_Integer aPriorityIter = 0; aPriorityIter < aNbPriorities; ++aPriorityIter) |
165 | { |
166 | for (OpenGl_SequenceOfStructure::Iterator aStructIter (myArray (aPriorityIter)); aStructIter.More(); aStructIter.Next()) |
167 | { |
168 | const OpenGl_Structure* aStruct = aStructIter.Value(); |
169 | if (!aStruct->IsVisible() |
170 | || aStruct->IsCulled()) |
171 | { |
172 | continue; |
173 | } |
a272ed94 |
174 | else if (!aStruct->ViewAffinity.IsNull() |
175 | && !aStruct->ViewAffinity->IsVisible (aViewId)) |
176 | { |
177 | continue; |
178 | } |
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179 | |
180 | aStruct->Render (theWorkspace); |
181 | aStruct->ResetCullingStatus(); |
182 | } |
183 | } |
184 | } |
185 | |
186 | // ======================================================================= |
187 | // function : traverse |
188 | // purpose : |
189 | // ======================================================================= |
190 | void OpenGl_Layer::traverse (OpenGl_BVHTreeSelector& theSelector) const |
191 | { |
192 | // handle a case when all objects are infinite |
193 | if (myBVHPrimitives.Size() == 0) |
194 | return; |
195 | |
196 | const NCollection_Handle<BVH_Tree<Standard_ShortReal, 4> >& aBVHTree = myBVHPrimitives.BVH(); |
197 | |
198 | Standard_Integer aNode = 0; // a root node |
199 | theSelector.CacheClipPtsProjections(); |
200 | if (!theSelector.Intersect (aBVHTree->MinPoint (0), |
201 | aBVHTree->MaxPoint (0))) |
202 | { |
203 | return; |
204 | } |
205 | |
206 | Standard_Integer aStack[32]; |
207 | Standard_Integer aHead = -1; |
208 | for (;;) |
209 | { |
210 | if (!aBVHTree->IsOuter (aNode)) |
211 | { |
212 | const Standard_Integer aLeftChildIdx = aBVHTree->LeftChild (aNode); |
213 | const Standard_Integer aRightChildIdx = aBVHTree->RightChild (aNode); |
214 | const Standard_Boolean isLeftChildIn = theSelector.Intersect (aBVHTree->MinPoint (aLeftChildIdx), |
215 | aBVHTree->MaxPoint (aLeftChildIdx)); |
216 | const Standard_Boolean isRightChildIn = theSelector.Intersect (aBVHTree->MinPoint (aRightChildIdx), |
217 | aBVHTree->MaxPoint (aRightChildIdx)); |
218 | if (isLeftChildIn |
219 | && isRightChildIn) |
220 | { |
221 | aNode = myBVHIsLeftChildQueuedFirst ? aLeftChildIdx : aRightChildIdx; |
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222 | aStack[++aHead] = myBVHIsLeftChildQueuedFirst ? aRightChildIdx : aLeftChildIdx; |
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223 | myBVHIsLeftChildQueuedFirst = !myBVHIsLeftChildQueuedFirst; |
224 | } |
225 | else if (isLeftChildIn |
226 | || isRightChildIn) |
227 | { |
228 | aNode = isLeftChildIn ? aLeftChildIdx : aRightChildIdx; |
229 | } |
230 | else |
231 | { |
232 | if (aHead < 0) |
233 | { |
234 | return; |
235 | } |
236 | |
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237 | aNode = aStack[aHead--]; |
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238 | } |
239 | } |
240 | else |
241 | { |
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242 | Standard_Integer aIdx = aBVHTree->BegPrimitive (aNode); |
243 | myBVHPrimitives.GetStructureById (aIdx)->MarkAsNotCulled(); |
244 | if (aHead < 0) |
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245 | { |
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246 | return; |
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247 | } |
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248 | |
249 | aNode = aStack[aHead--]; |
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250 | } |
251 | } |
252 | } |
253 | |
254 | // ======================================================================= |
255 | // function : Append |
256 | // purpose : |
257 | // ======================================================================= |
258 | Standard_Boolean OpenGl_Layer::Append (const OpenGl_Layer& theOther) |
259 | { |
260 | // the source priority list shouldn't have more priorities |
261 | const Standard_Integer aNbPriorities = theOther.NbPriorities(); |
262 | if (aNbPriorities > NbPriorities()) |
263 | { |
264 | return Standard_False; |
265 | } |
266 | |
267 | // add all structures to destination priority list |
268 | for (Standard_Integer aPriorityIter = 0; aPriorityIter < aNbPriorities; ++aPriorityIter) |
269 | { |
270 | for (OpenGl_SequenceOfStructure::Iterator aStructIter (theOther.myArray (aPriorityIter)); aStructIter.More(); aStructIter.Next()) |
271 | { |
272 | Add (aStructIter.Value(), aPriorityIter); |
273 | } |
274 | } |
275 | |
276 | return Standard_True; |
277 | } |
278 | |
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279 | //======================================================================= |
280 | //function : Render |
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281 | //purpose : |
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282 | //======================================================================= |
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283 | void OpenGl_Layer::Render (const Handle(OpenGl_Workspace)& theWorkspace, |
284 | const OpenGl_GlobalLayerSettings& theDefaultSettings) const |
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285 | { |
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286 | TEL_POFFSET_PARAM anAppliedOffsetParams = theWorkspace->AppliedPolygonOffset(); |
287 | |
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288 | // separate depth buffers |
289 | if (IsSettingEnabled (Graphic3d_ZLayerDepthClear)) |
290 | { |
291 | glClear (GL_DEPTH_BUFFER_BIT); |
292 | } |
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293 | |
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294 | // handle depth test |
295 | if (IsSettingEnabled (Graphic3d_ZLayerDepthTest)) |
296 | { |
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297 | // assuming depth test is enabled by default |
298 | glDepthFunc (theDefaultSettings.DepthFunc); |
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299 | } |
300 | else |
301 | { |
302 | glDepthFunc (GL_ALWAYS); |
303 | } |
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304 | |
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305 | // handle depth offset |
306 | if (IsSettingEnabled (Graphic3d_ZLayerDepthOffset)) |
307 | { |
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308 | theWorkspace->SetPolygonOffset (Aspect_POM_Fill, |
309 | myLayerSettings.DepthOffsetFactor, |
310 | myLayerSettings.DepthOffsetUnits); |
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311 | } |
312 | else |
313 | { |
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314 | theWorkspace->SetPolygonOffset (anAppliedOffsetParams.mode, |
315 | anAppliedOffsetParams.factor, |
316 | anAppliedOffsetParams.units); |
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317 | } |
318 | |
319 | // handle depth write |
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320 | glDepthMask (IsSettingEnabled (Graphic3d_ZLayerDepthWrite) ? GL_TRUE : GL_FALSE); |
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321 | |
322 | // render priority list |
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323 | theWorkspace->IsCullingEnabled() ? renderTraverse (theWorkspace) : renderAll (theWorkspace); |
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324 | |
325 | // always restore polygon offset between layers rendering |
326 | theWorkspace->SetPolygonOffset (anAppliedOffsetParams.mode, |
327 | anAppliedOffsetParams.factor, |
328 | anAppliedOffsetParams.units); |
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329 | } |