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> |
c04c30b3 |
22 | #include <Graphic3d_GraphicDriver.hxx> |
c5751993 |
23 | |
a1954302 |
24 | // ======================================================================= |
25 | // function : OpenGl_PriorityList |
26 | // purpose : |
27 | // ======================================================================= |
c5751993 |
28 | OpenGl_Layer::OpenGl_Layer (const Standard_Integer theNbPriorities) |
a1954302 |
29 | : myArray (0, theNbPriorities - 1), |
30 | myNbStructures (0), |
31 | myBVHIsLeftChildQueuedFirst (Standard_True), |
32 | myIsBVHPrimitivesNeedsReset (Standard_False) |
c5751993 |
33 | { |
34 | // |
35 | } |
36 | |
a1954302 |
37 | // ======================================================================= |
38 | // function : ~OpenGl_Layer |
39 | // purpose : |
40 | // ======================================================================= |
41 | OpenGl_Layer::~OpenGl_Layer() |
42 | { |
43 | // |
44 | } |
45 | |
46 | // ======================================================================= |
47 | // function : Add |
48 | // purpose : |
49 | // ======================================================================= |
50 | void OpenGl_Layer::Add (const OpenGl_Structure* theStruct, |
51 | const Standard_Integer thePriority, |
52 | Standard_Boolean isForChangePriority) |
53 | { |
54 | const Standard_Integer anIndex = Min (Max (thePriority, 0), myArray.Length() - 1); |
55 | if (theStruct == NULL) |
56 | { |
57 | return; |
58 | } |
59 | |
9f112210 |
60 | myArray (anIndex).Add (theStruct); |
a1954302 |
61 | if (theStruct->IsAlwaysRendered()) |
62 | { |
63 | theStruct->MarkAsNotCulled(); |
64 | } |
65 | else if (!isForChangePriority) |
66 | { |
67 | myBVHPrimitives.Add (theStruct); |
68 | } |
69 | ++myNbStructures; |
70 | } |
71 | |
72 | // ======================================================================= |
73 | // function : Remove |
74 | // purpose : |
75 | // ======================================================================= |
76 | bool OpenGl_Layer::Remove (const OpenGl_Structure* theStruct, |
77 | Standard_Integer& thePriority, |
78 | Standard_Boolean isForChangePriority) |
79 | { |
80 | if (theStruct == NULL) |
81 | { |
82 | thePriority = -1; |
83 | return false; |
84 | } |
85 | |
86 | const Standard_Integer aNbPriorities = myArray.Length(); |
87 | for (Standard_Integer aPriorityIter = 0; aPriorityIter < aNbPriorities; ++aPriorityIter) |
88 | { |
9f112210 |
89 | OpenGl_IndexedMapOfStructure& aStructures = myArray (aPriorityIter); |
90 | |
91 | const Standard_Integer anIndex = aStructures.FindIndex (theStruct); |
92 | if (anIndex != 0) |
a1954302 |
93 | { |
9f112210 |
94 | aStructures.Swap (anIndex, aStructures.Size()); |
95 | aStructures.RemoveLast(); |
96 | |
97 | if (!theStruct->IsAlwaysRendered() |
98 | && !isForChangePriority) |
a1954302 |
99 | { |
9f112210 |
100 | myBVHPrimitives.Remove (theStruct); |
a1954302 |
101 | } |
9f112210 |
102 | --myNbStructures; |
103 | thePriority = aPriorityIter; |
104 | return true; |
a1954302 |
105 | } |
106 | } |
107 | |
108 | thePriority = -1; |
109 | return false; |
110 | } |
111 | |
112 | // ======================================================================= |
113 | // function : InvalidateBVHData |
114 | // purpose : |
115 | // ======================================================================= |
116 | void OpenGl_Layer::InvalidateBVHData() |
117 | { |
118 | myIsBVHPrimitivesNeedsReset = Standard_True; |
119 | } |
120 | |
121 | // ======================================================================= |
122 | // function : renderAll |
123 | // purpose : |
124 | // ======================================================================= |
125 | void OpenGl_Layer::renderAll (const Handle(OpenGl_Workspace)& theWorkspace) const |
126 | { |
127 | const Standard_Integer aNbPriorities = myArray.Length(); |
a272ed94 |
128 | const Standard_Integer aViewId = theWorkspace->ActiveViewId(); |
a1954302 |
129 | for (Standard_Integer aPriorityIter = 0; aPriorityIter < aNbPriorities; ++aPriorityIter) |
130 | { |
9f112210 |
131 | const OpenGl_IndexedMapOfStructure& aStructures = myArray (aPriorityIter); |
132 | for (Standard_Integer aStructIdx = 1; aStructIdx <= aStructures.Size(); ++aStructIdx) |
a1954302 |
133 | { |
9f112210 |
134 | const OpenGl_Structure* aStruct = aStructures.FindKey (aStructIdx); |
a1954302 |
135 | if (!aStruct->IsVisible()) |
136 | { |
137 | continue; |
138 | } |
a272ed94 |
139 | else if (!aStruct->ViewAffinity.IsNull() |
140 | && !aStruct->ViewAffinity->IsVisible (aViewId)) |
141 | { |
142 | continue; |
143 | } |
a1954302 |
144 | |
145 | aStruct->Render (theWorkspace); |
146 | } |
147 | } |
148 | } |
149 | |
150 | // ======================================================================= |
151 | // function : renderTraverse |
152 | // purpose : |
153 | // ======================================================================= |
154 | void OpenGl_Layer::renderTraverse (const Handle(OpenGl_Workspace)& theWorkspace) const |
155 | { |
156 | if (myIsBVHPrimitivesNeedsReset) |
157 | { |
158 | myBVHPrimitives.Assign (myArray); |
159 | myIsBVHPrimitivesNeedsReset = Standard_False; |
160 | } |
161 | |
162 | OpenGl_BVHTreeSelector& aSelector = theWorkspace->ActiveView()->BVHTreeSelector(); |
163 | traverse (aSelector); |
164 | |
165 | const Standard_Integer aNbPriorities = myArray.Length(); |
a272ed94 |
166 | const Standard_Integer aViewId = theWorkspace->ActiveViewId(); |
a1954302 |
167 | for (Standard_Integer aPriorityIter = 0; aPriorityIter < aNbPriorities; ++aPriorityIter) |
168 | { |
9f112210 |
169 | const OpenGl_IndexedMapOfStructure& aStructures = myArray (aPriorityIter); |
170 | for (Standard_Integer aStructIdx = 1; aStructIdx <= aStructures.Size(); ++aStructIdx) |
a1954302 |
171 | { |
9f112210 |
172 | const OpenGl_Structure* aStruct = aStructures.FindKey (aStructIdx); |
a1954302 |
173 | if (!aStruct->IsVisible() |
174 | || aStruct->IsCulled()) |
175 | { |
176 | continue; |
177 | } |
a272ed94 |
178 | else if (!aStruct->ViewAffinity.IsNull() |
179 | && !aStruct->ViewAffinity->IsVisible (aViewId)) |
180 | { |
181 | continue; |
182 | } |
a1954302 |
183 | |
184 | aStruct->Render (theWorkspace); |
185 | aStruct->ResetCullingStatus(); |
186 | } |
187 | } |
188 | } |
189 | |
190 | // ======================================================================= |
191 | // function : traverse |
192 | // purpose : |
193 | // ======================================================================= |
194 | void OpenGl_Layer::traverse (OpenGl_BVHTreeSelector& theSelector) const |
195 | { |
196 | // handle a case when all objects are infinite |
197 | if (myBVHPrimitives.Size() == 0) |
198 | return; |
199 | |
200 | const NCollection_Handle<BVH_Tree<Standard_ShortReal, 4> >& aBVHTree = myBVHPrimitives.BVH(); |
201 | |
202 | Standard_Integer aNode = 0; // a root node |
203 | theSelector.CacheClipPtsProjections(); |
204 | if (!theSelector.Intersect (aBVHTree->MinPoint (0), |
205 | aBVHTree->MaxPoint (0))) |
206 | { |
207 | return; |
208 | } |
209 | |
210 | Standard_Integer aStack[32]; |
211 | Standard_Integer aHead = -1; |
212 | for (;;) |
213 | { |
214 | if (!aBVHTree->IsOuter (aNode)) |
215 | { |
216 | const Standard_Integer aLeftChildIdx = aBVHTree->LeftChild (aNode); |
217 | const Standard_Integer aRightChildIdx = aBVHTree->RightChild (aNode); |
218 | const Standard_Boolean isLeftChildIn = theSelector.Intersect (aBVHTree->MinPoint (aLeftChildIdx), |
219 | aBVHTree->MaxPoint (aLeftChildIdx)); |
220 | const Standard_Boolean isRightChildIn = theSelector.Intersect (aBVHTree->MinPoint (aRightChildIdx), |
221 | aBVHTree->MaxPoint (aRightChildIdx)); |
222 | if (isLeftChildIn |
223 | && isRightChildIn) |
224 | { |
225 | aNode = myBVHIsLeftChildQueuedFirst ? aLeftChildIdx : aRightChildIdx; |
14a35e5d |
226 | aStack[++aHead] = myBVHIsLeftChildQueuedFirst ? aRightChildIdx : aLeftChildIdx; |
a1954302 |
227 | myBVHIsLeftChildQueuedFirst = !myBVHIsLeftChildQueuedFirst; |
228 | } |
229 | else if (isLeftChildIn |
230 | || isRightChildIn) |
231 | { |
232 | aNode = isLeftChildIn ? aLeftChildIdx : aRightChildIdx; |
233 | } |
234 | else |
235 | { |
236 | if (aHead < 0) |
237 | { |
238 | return; |
239 | } |
240 | |
14a35e5d |
241 | aNode = aStack[aHead--]; |
a1954302 |
242 | } |
243 | } |
244 | else |
245 | { |
14a35e5d |
246 | Standard_Integer aIdx = aBVHTree->BegPrimitive (aNode); |
247 | myBVHPrimitives.GetStructureById (aIdx)->MarkAsNotCulled(); |
248 | if (aHead < 0) |
a1954302 |
249 | { |
14a35e5d |
250 | return; |
a1954302 |
251 | } |
14a35e5d |
252 | |
253 | aNode = aStack[aHead--]; |
a1954302 |
254 | } |
255 | } |
256 | } |
257 | |
258 | // ======================================================================= |
259 | // function : Append |
260 | // purpose : |
261 | // ======================================================================= |
262 | Standard_Boolean OpenGl_Layer::Append (const OpenGl_Layer& theOther) |
263 | { |
264 | // the source priority list shouldn't have more priorities |
265 | const Standard_Integer aNbPriorities = theOther.NbPriorities(); |
266 | if (aNbPriorities > NbPriorities()) |
267 | { |
268 | return Standard_False; |
269 | } |
270 | |
271 | // add all structures to destination priority list |
272 | for (Standard_Integer aPriorityIter = 0; aPriorityIter < aNbPriorities; ++aPriorityIter) |
273 | { |
9f112210 |
274 | const OpenGl_IndexedMapOfStructure& aStructures = theOther.myArray (aPriorityIter); |
275 | for (Standard_Integer aStructIdx = 1; aStructIdx <= aStructures.Size(); ++aStructIdx) |
a1954302 |
276 | { |
9f112210 |
277 | Add (aStructures.FindKey (aStructIdx), aPriorityIter); |
a1954302 |
278 | } |
279 | } |
280 | |
281 | return Standard_True; |
282 | } |
283 | |
c5751993 |
284 | //======================================================================= |
285 | //function : Render |
a1954302 |
286 | //purpose : |
c5751993 |
287 | //======================================================================= |
a1954302 |
288 | void OpenGl_Layer::Render (const Handle(OpenGl_Workspace)& theWorkspace, |
289 | const OpenGl_GlobalLayerSettings& theDefaultSettings) const |
c5751993 |
290 | { |
550f3b8b |
291 | TEL_POFFSET_PARAM anAppliedOffsetParams = theWorkspace->AppliedPolygonOffset(); |
292 | |
c5751993 |
293 | // separate depth buffers |
294 | if (IsSettingEnabled (Graphic3d_ZLayerDepthClear)) |
295 | { |
296 | glClear (GL_DEPTH_BUFFER_BIT); |
297 | } |
eae454e3 |
298 | |
c5751993 |
299 | // handle depth test |
300 | if (IsSettingEnabled (Graphic3d_ZLayerDepthTest)) |
301 | { |
550f3b8b |
302 | // assuming depth test is enabled by default |
303 | glDepthFunc (theDefaultSettings.DepthFunc); |
c5751993 |
304 | } |
305 | else |
306 | { |
307 | glDepthFunc (GL_ALWAYS); |
308 | } |
eae454e3 |
309 | |
c5751993 |
310 | // handle depth offset |
311 | if (IsSettingEnabled (Graphic3d_ZLayerDepthOffset)) |
312 | { |
550f3b8b |
313 | theWorkspace->SetPolygonOffset (Aspect_POM_Fill, |
314 | myLayerSettings.DepthOffsetFactor, |
315 | myLayerSettings.DepthOffsetUnits); |
c5751993 |
316 | } |
317 | else |
318 | { |
550f3b8b |
319 | theWorkspace->SetPolygonOffset (anAppliedOffsetParams.mode, |
320 | anAppliedOffsetParams.factor, |
321 | anAppliedOffsetParams.units); |
c5751993 |
322 | } |
323 | |
324 | // handle depth write |
eae454e3 |
325 | theWorkspace->UseDepthWrite() = IsSettingEnabled (Graphic3d_ZLayerDepthWrite); |
326 | glDepthMask (theWorkspace->UseDepthWrite() ? GL_TRUE : GL_FALSE); |
c5751993 |
327 | |
328 | // render priority list |
a1954302 |
329 | theWorkspace->IsCullingEnabled() ? renderTraverse (theWorkspace) : renderAll (theWorkspace); |
550f3b8b |
330 | |
331 | // always restore polygon offset between layers rendering |
332 | theWorkspace->SetPolygonOffset (anAppliedOffsetParams.mode, |
333 | anAppliedOffsetParams.factor, |
334 | anAppliedOffsetParams.units); |
c5751993 |
335 | } |