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c5751993 | 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> | |
a1954302 | 17 | |
18 | #include <OpenGl_BVHTreeSelector.hxx> | |
19 | #include <OpenGl_Structure.hxx> | |
20 | #include <OpenGl_View.hxx> | |
550f3b8b | 21 | #include <OpenGl_Workspace.hxx> |
c5751993 | 22 | |
a1954302 | 23 | // ======================================================================= |
24 | // function : OpenGl_PriorityList | |
25 | // purpose : | |
26 | // ======================================================================= | |
c5751993 | 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) | |
c5751993 | 32 | { |
33 | // | |
34 | } | |
35 | ||
a1954302 | 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(); | |
126 | for (Standard_Integer aPriorityIter = 0; aPriorityIter < aNbPriorities; ++aPriorityIter) | |
127 | { | |
128 | for (OpenGl_SequenceOfStructure::Iterator aStructIter (myArray (aPriorityIter)); aStructIter.More(); aStructIter.Next()) | |
129 | { | |
130 | const OpenGl_Structure* aStruct = aStructIter.Value(); | |
131 | if (!aStruct->IsVisible()) | |
132 | { | |
133 | continue; | |
134 | } | |
135 | ||
136 | aStruct->Render (theWorkspace); | |
137 | } | |
138 | } | |
139 | } | |
140 | ||
141 | // ======================================================================= | |
142 | // function : renderTraverse | |
143 | // purpose : | |
144 | // ======================================================================= | |
145 | void OpenGl_Layer::renderTraverse (const Handle(OpenGl_Workspace)& theWorkspace) const | |
146 | { | |
147 | if (myIsBVHPrimitivesNeedsReset) | |
148 | { | |
149 | myBVHPrimitives.Assign (myArray); | |
150 | myIsBVHPrimitivesNeedsReset = Standard_False; | |
151 | } | |
152 | ||
153 | OpenGl_BVHTreeSelector& aSelector = theWorkspace->ActiveView()->BVHTreeSelector(); | |
154 | traverse (aSelector); | |
155 | ||
156 | const Standard_Integer aNbPriorities = myArray.Length(); | |
157 | for (Standard_Integer aPriorityIter = 0; aPriorityIter < aNbPriorities; ++aPriorityIter) | |
158 | { | |
159 | for (OpenGl_SequenceOfStructure::Iterator aStructIter (myArray (aPriorityIter)); aStructIter.More(); aStructIter.Next()) | |
160 | { | |
161 | const OpenGl_Structure* aStruct = aStructIter.Value(); | |
162 | if (!aStruct->IsVisible() | |
163 | || aStruct->IsCulled()) | |
164 | { | |
165 | continue; | |
166 | } | |
167 | ||
168 | aStruct->Render (theWorkspace); | |
169 | aStruct->ResetCullingStatus(); | |
170 | } | |
171 | } | |
172 | } | |
173 | ||
174 | // ======================================================================= | |
175 | // function : traverse | |
176 | // purpose : | |
177 | // ======================================================================= | |
178 | void OpenGl_Layer::traverse (OpenGl_BVHTreeSelector& theSelector) const | |
179 | { | |
180 | // handle a case when all objects are infinite | |
181 | if (myBVHPrimitives.Size() == 0) | |
182 | return; | |
183 | ||
184 | const NCollection_Handle<BVH_Tree<Standard_ShortReal, 4> >& aBVHTree = myBVHPrimitives.BVH(); | |
185 | ||
186 | Standard_Integer aNode = 0; // a root node | |
187 | theSelector.CacheClipPtsProjections(); | |
188 | if (!theSelector.Intersect (aBVHTree->MinPoint (0), | |
189 | aBVHTree->MaxPoint (0))) | |
190 | { | |
191 | return; | |
192 | } | |
193 | ||
194 | Standard_Integer aStack[32]; | |
195 | Standard_Integer aHead = -1; | |
196 | for (;;) | |
197 | { | |
198 | if (!aBVHTree->IsOuter (aNode)) | |
199 | { | |
200 | const Standard_Integer aLeftChildIdx = aBVHTree->LeftChild (aNode); | |
201 | const Standard_Integer aRightChildIdx = aBVHTree->RightChild (aNode); | |
202 | const Standard_Boolean isLeftChildIn = theSelector.Intersect (aBVHTree->MinPoint (aLeftChildIdx), | |
203 | aBVHTree->MaxPoint (aLeftChildIdx)); | |
204 | const Standard_Boolean isRightChildIn = theSelector.Intersect (aBVHTree->MinPoint (aRightChildIdx), | |
205 | aBVHTree->MaxPoint (aRightChildIdx)); | |
206 | if (isLeftChildIn | |
207 | && isRightChildIn) | |
208 | { | |
209 | aNode = myBVHIsLeftChildQueuedFirst ? aLeftChildIdx : aRightChildIdx; | |
14a35e5d | 210 | aStack[++aHead] = myBVHIsLeftChildQueuedFirst ? aRightChildIdx : aLeftChildIdx; |
a1954302 | 211 | myBVHIsLeftChildQueuedFirst = !myBVHIsLeftChildQueuedFirst; |
212 | } | |
213 | else if (isLeftChildIn | |
214 | || isRightChildIn) | |
215 | { | |
216 | aNode = isLeftChildIn ? aLeftChildIdx : aRightChildIdx; | |
217 | } | |
218 | else | |
219 | { | |
220 | if (aHead < 0) | |
221 | { | |
222 | return; | |
223 | } | |
224 | ||
14a35e5d | 225 | aNode = aStack[aHead--]; |
a1954302 | 226 | } |
227 | } | |
228 | else | |
229 | { | |
14a35e5d | 230 | Standard_Integer aIdx = aBVHTree->BegPrimitive (aNode); |
231 | myBVHPrimitives.GetStructureById (aIdx)->MarkAsNotCulled(); | |
232 | if (aHead < 0) | |
a1954302 | 233 | { |
14a35e5d | 234 | return; |
a1954302 | 235 | } |
14a35e5d | 236 | |
237 | aNode = aStack[aHead--]; | |
a1954302 | 238 | } |
239 | } | |
240 | } | |
241 | ||
242 | // ======================================================================= | |
243 | // function : Append | |
244 | // purpose : | |
245 | // ======================================================================= | |
246 | Standard_Boolean OpenGl_Layer::Append (const OpenGl_Layer& theOther) | |
247 | { | |
248 | // the source priority list shouldn't have more priorities | |
249 | const Standard_Integer aNbPriorities = theOther.NbPriorities(); | |
250 | if (aNbPriorities > NbPriorities()) | |
251 | { | |
252 | return Standard_False; | |
253 | } | |
254 | ||
255 | // add all structures to destination priority list | |
256 | for (Standard_Integer aPriorityIter = 0; aPriorityIter < aNbPriorities; ++aPriorityIter) | |
257 | { | |
258 | for (OpenGl_SequenceOfStructure::Iterator aStructIter (theOther.myArray (aPriorityIter)); aStructIter.More(); aStructIter.Next()) | |
259 | { | |
260 | Add (aStructIter.Value(), aPriorityIter); | |
261 | } | |
262 | } | |
263 | ||
264 | return Standard_True; | |
265 | } | |
266 | ||
c5751993 | 267 | //======================================================================= |
268 | //function : Render | |
a1954302 | 269 | //purpose : |
c5751993 | 270 | //======================================================================= |
a1954302 | 271 | void OpenGl_Layer::Render (const Handle(OpenGl_Workspace)& theWorkspace, |
272 | const OpenGl_GlobalLayerSettings& theDefaultSettings) const | |
c5751993 | 273 | { |
550f3b8b | 274 | TEL_POFFSET_PARAM anAppliedOffsetParams = theWorkspace->AppliedPolygonOffset(); |
275 | ||
c5751993 | 276 | // separate depth buffers |
277 | if (IsSettingEnabled (Graphic3d_ZLayerDepthClear)) | |
278 | { | |
279 | glClear (GL_DEPTH_BUFFER_BIT); | |
280 | } | |
550f3b8b | 281 | |
c5751993 | 282 | // handle depth test |
283 | if (IsSettingEnabled (Graphic3d_ZLayerDepthTest)) | |
284 | { | |
550f3b8b | 285 | // assuming depth test is enabled by default |
286 | glDepthFunc (theDefaultSettings.DepthFunc); | |
c5751993 | 287 | } |
288 | else | |
289 | { | |
290 | glDepthFunc (GL_ALWAYS); | |
291 | } | |
550f3b8b | 292 | |
c5751993 | 293 | // handle depth offset |
294 | if (IsSettingEnabled (Graphic3d_ZLayerDepthOffset)) | |
295 | { | |
550f3b8b | 296 | theWorkspace->SetPolygonOffset (Aspect_POM_Fill, |
297 | myLayerSettings.DepthOffsetFactor, | |
298 | myLayerSettings.DepthOffsetUnits); | |
c5751993 | 299 | } |
300 | else | |
301 | { | |
550f3b8b | 302 | theWorkspace->SetPolygonOffset (anAppliedOffsetParams.mode, |
303 | anAppliedOffsetParams.factor, | |
304 | anAppliedOffsetParams.units); | |
c5751993 | 305 | } |
306 | ||
307 | // handle depth write | |
a1954302 | 308 | glDepthMask (IsSettingEnabled (Graphic3d_ZLayerDepthWrite) ? GL_TRUE : GL_FALSE); |
c5751993 | 309 | |
310 | // render priority list | |
a1954302 | 311 | theWorkspace->IsCullingEnabled() ? renderTraverse (theWorkspace) : renderAll (theWorkspace); |
550f3b8b | 312 | |
313 | // always restore polygon offset between layers rendering | |
314 | theWorkspace->SetPolygonOffset (anAppliedOffsetParams.mode, | |
315 | anAppliedOffsetParams.factor, | |
316 | anAppliedOffsetParams.units); | |
c5751993 | 317 | } |