summaryrefslogtreecommitdiff
path: root/indra/newview/llheroprobemanager.cpp
blob: bbe493f6a9ead2edaeaaa972bb7262535f500f1c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
/**
 * @file LLHeroProbeManager.cpp
 * @brief LLHeroProbeManager class implementation
 *
 * $LicenseInfo:firstyear=2022&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2022, Linden Research, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h"

#include "llheroprobemanager.h"
#include "llreflectionmapmanager.h"
#include "llviewercamera.h"
#include "llspatialpartition.h"
#include "llviewerregion.h"
#include "pipeline.h"
#include "llviewershadermgr.h"
#include "llviewercontrol.h"
#include "llenvironment.h"
#include "llstartup.h"
#include "llagent.h"
#include "llagentcamera.h"
#include "llviewerwindow.h"
#include "llviewerjoystick.h"
#include "llviewermediafocus.h"

extern BOOL gCubeSnapshot;
extern BOOL gTeleportDisplay;

// get the next highest power of two of v (or v if v is already a power of two)
//defined in llvertexbuffer.cpp
extern U32 nhpo2(U32 v);

static void touch_default_probe(LLReflectionMap* probe)
{
    if (LLViewerCamera::getInstance())
    {
        LLVector3 origin = LLViewerCamera::getInstance()->getOrigin();
        origin.mV[2] += 64.f;

        probe->mOrigin.load3(origin.mV);
    }
}

LLHeroProbeManager::LLHeroProbeManager()
{
}

// helper class to seed octree with probes
void LLHeroProbeManager::update()
{
    if (!LLPipeline::RenderMirrors || gTeleportDisplay || LLStartUp::getStartupState() < STATE_PRECACHE)
    {
        return;
    }

    LL_PROFILE_ZONE_SCOPED_CATEGORY_DISPLAY;
    llassert(!gCubeSnapshot); // assert a snapshot is not in progress
    if (LLAppViewer::instance()->logoutRequestSent())
    {
        return;
    }

    initReflectionMaps();

    if (!mRenderTarget.isComplete())
    {
        U32 color_fmt = GL_RGBA16F;
        U32 targetRes = mProbeResolution; // super sample
        mRenderTarget.allocate(targetRes, targetRes, color_fmt, true);
    }

    if (mMipChain.empty())
    {
        U32 res = mProbeResolution;
        U32 count = log2((F32)res) + 0.5f;

        mMipChain.resize(count);
        for (int i = 0; i < count; ++i)
        {
            mMipChain[i].allocate(res, res, GL_RGBA16F);
            res /= 2;
        }
    }

    llassert(mProbes[0] == mDefaultProbe);

    LLVector4a probe_pos;
    LLVector3 camera_pos = LLViewerCamera::instance().mOrigin;
    F32        near_clip  = 0.1f;
    if (mHeroVOList.size() > 0)
    {
        // Find our nearest hero candidate.

        float last_distance = 99999.f;

        for (auto vo : mHeroVOList)
        {
            if (vo)
            {
                if (vo->mDrawable.notNull())
                {
                    if (vo->mDrawable->mDistanceWRTCamera < last_distance)
                    {
                        mNearestHero = vo;
                        last_distance = vo->mDrawable->mDistanceWRTCamera;
                    }
                }
                else
                {
                    // Valid drawables only please.  Unregister this one.
                    unregisterHeroDrawable(vo);
                }
            }
            else
            {
                unregisterHeroDrawable(vo);
            }
        }

        if (mNearestHero != nullptr && mNearestHero->mDrawable.notNull())
        {
            U8        mode     = mNearestHero->mirrorFace();
            mode    = llmin(mNearestHero->mDrawable->getNumFaces() - 1, mode);

            mCurrentFace       = mNearestHero->mDrawable->getFace(mode);
            LLVector3 hero_pos = mCurrentFace->getPositionAgent();


            // Calculate the average normal.
            LLVector4a *posp = mCurrentFace->getViewerObject()->getVolume()->getVolumeFace(mCurrentFace->getTEOffset()).mPositions;
            U16        *indp = mCurrentFace->getViewerObject()->getVolume()->getVolumeFace(mCurrentFace->getTEOffset()).mIndices;
            // get first three vertices (first triangle)
            LLVector4a v0 = posp[indp[0]];
            LLVector4a   v1 = posp[indp[1]];
            LLVector4a   v2 = posp[indp[2]];

            v1.sub(v0);
            v2.sub(v0);
            LLVector3 face_normal = LLVector3(v1[0], v1[1], v1[2]) % LLVector3(v2[0], v2[1], v2[2]);

            face_normal.normalize();
            face_normal *= mCurrentFace->getXform()->getWorldRotation();

            LLVector3 offset = camera_pos - hero_pos;
            LLVector3 project = face_normal * (offset * face_normal);
            LLVector3 reject  = offset - project;
            LLVector3 point   = (reject - project) + hero_pos;

            mCurrentClipPlane.setVec(hero_pos, face_normal);
            mMirrorPosition = hero_pos;
            mMirrorNormal   = LLVector3(0, 0, 1);
        

            probe_pos.load3(point.mV);
        }
            
        mHeroProbeStrength = 1;
    }
    else
    {
        probe_pos.load3(camera_pos.mV);
    }
    
    
    static LLCachedControl<S32> sDetail(gSavedSettings, "RenderHeroReflectionProbeDetail", -1);
    static LLCachedControl<S32> sLevel(gSavedSettings, "RenderHeroReflectionProbeLevel", 3);

    {
        LL_PROFILE_ZONE_NAMED_CATEGORY_DISPLAY("hpmu - realtime");
        // Probe 0 is always our mirror probe.
        mProbes[0]->mOrigin = probe_pos;
        
        bool radiance_pass = gPipeline.mReflectionMapManager.isRadiancePass();
        
        gPipeline.mReflectionMapManager.mRadiancePass = true;
        mRenderingMirror = true;
        for (U32 j = 0; j < mProbes.size(); j++)
        {
            for (U32 i = 0; i < 6; ++i)
            {
                updateProbeFace(mProbes[j], i, near_clip);
            }
        }
        mRenderingMirror = false;
        
        gPipeline.mReflectionMapManager.mRadiancePass = radiance_pass;
    }
}

// Do the reflection map update render passes.
// For every 12 calls of this function, one complete reflection probe radiance map and irradiance map is generated
// First six passes render the scene with direct lighting only into a scratch space cube map at the end of the cube map array and generate 
// a simple mip chain (not convolution filter).
// At the end of these passes, an irradiance map is generated for this probe and placed into the irradiance cube map array at the index for this probe
// The next six passes render the scene with both radiance and irradiance into the same scratch space cube map and generate a simple mip chain.
// At the end of these passes, a radiance map is generated for this probe and placed into the radiance cube map array at the index for this probe.
// In effect this simulates single-bounce lighting.
void LLHeroProbeManager::updateProbeFace(LLReflectionMap* probe, U32 face, F32 near_clip)
{
    // hacky hot-swap of camera specific render targets
    gPipeline.mRT = &gPipeline.mAuxillaryRT;

    probe->update(mRenderTarget.getWidth(), face, true, near_clip);
    
    gPipeline.mRT = &gPipeline.mMainRT;

    S32 sourceIdx = mReflectionProbeCount;
    
    
    // Unlike the reflectionmap manager, all probes are considered "realtime" for hero probes.
    sourceIdx += 1;

    gGL.setColorMask(true, true);
    LLGLDepthTest depth(GL_FALSE, GL_FALSE);
    LLGLDisable cull(GL_CULL_FACE);
    LLGLDisable blend(GL_BLEND);
    
    // downsample to placeholder map
    {
        gGL.matrixMode(gGL.MM_MODELVIEW);
        gGL.pushMatrix();
        gGL.loadIdentity();

        gGL.matrixMode(gGL.MM_PROJECTION);
        gGL.pushMatrix();
        gGL.loadIdentity();

        gGL.flush();
        U32 res = mProbeResolution * 2;

        static LLStaticHashedString resScale("resScale");
        static LLStaticHashedString direction("direction");
        static LLStaticHashedString znear("znear");
        static LLStaticHashedString zfar("zfar");

        LLRenderTarget *screen_rt = &gPipeline.mAuxillaryRT.screen;
        LLRenderTarget *depth_rt  = &gPipeline.mAuxillaryRT.deferredScreen;

        // perform a gaussian blur on the super sampled render before downsampling
        {
            gGaussianProgram.bind();
            gGaussianProgram.uniform1f(resScale, 1.f / mProbeResolution);
            S32 diffuseChannel = gGaussianProgram.enableTexture(LLShaderMgr::DEFERRED_DIFFUSE, LLTexUnit::TT_TEXTURE);

            // horizontal
            gGaussianProgram.uniform2f(direction, 1.f, 0.f);
            gGL.getTexUnit(diffuseChannel)->bind(screen_rt);
            mRenderTarget.bindTarget();
            gPipeline.mScreenTriangleVB->setBuffer();
            gPipeline.mScreenTriangleVB->drawArrays(LLRender::TRIANGLES, 0, 3);
            mRenderTarget.flush();

            // vertical
            gGaussianProgram.uniform2f(direction, 0.f, 1.f);
            gGL.getTexUnit(diffuseChannel)->bind(&mRenderTarget);
            screen_rt->bindTarget();
            gPipeline.mScreenTriangleVB->setBuffer();
            gPipeline.mScreenTriangleVB->drawArrays(LLRender::TRIANGLES, 0, 3);
            screen_rt->flush();
        }


        S32 mips = log2((F32)mProbeResolution) + 0.5f;

        gReflectionMipProgram.bind();
        S32 diffuseChannel = gReflectionMipProgram.enableTexture(LLShaderMgr::DEFERRED_DIFFUSE, LLTexUnit::TT_TEXTURE);
        S32 depthChannel   = gReflectionMipProgram.enableTexture(LLShaderMgr::DEFERRED_DEPTH, LLTexUnit::TT_TEXTURE);

        for (int i = 0; i < mMipChain.size(); ++i)
        {
            LL_PROFILE_GPU_ZONE("probe mip");
            mMipChain[i].bindTarget();
            if (i == 0)
            {
                gGL.getTexUnit(diffuseChannel)->bind(screen_rt);
            }
            else
            {
                gGL.getTexUnit(diffuseChannel)->bind(&(mMipChain[i - 1]));
            }

            gGL.getTexUnit(depthChannel)->bind(depth_rt, true);
            
            gReflectionMipProgram.uniform1f(resScale, 1.f / (mProbeResolution * 2));
            gReflectionMipProgram.uniform1f(znear, probe->getNearClip());
            gReflectionMipProgram.uniform1f(zfar, MAX_FAR_CLIP);
            
            gPipeline.mScreenTriangleVB->setBuffer();
            gPipeline.mScreenTriangleVB->drawArrays(LLRender::TRIANGLES, 0, 3);
            
            res /= 2;

            S32 mip = i - (mMipChain.size() - mips);

            if (mip >= 0)
            {
                LL_PROFILE_GPU_ZONE("probe mip copy");
                mTexture->bind(0);

                glCopyTexSubImage3D(GL_TEXTURE_CUBE_MAP_ARRAY, mip, 0, 0, sourceIdx * 6 + face, 0, 0, res, res);

                mTexture->unbind();
            }
            mMipChain[i].flush();
        }

        gGL.popMatrix();
        gGL.matrixMode(gGL.MM_MODELVIEW);
        gGL.popMatrix();

        gGL.getTexUnit(diffuseChannel)->unbind(LLTexUnit::TT_TEXTURE);
        gReflectionMipProgram.unbind();
    }

    if (face == 5)
    {
        mMipChain[0].bindTarget();
        static LLStaticHashedString sSourceIdx("sourceIdx");

        {
            //generate radiance map (even if this is not the irradiance map, we need the mip chain for the irradiance map)
            gRadianceGenProgram.bind();
            mVertexBuffer->setBuffer();

            S32 channel = gRadianceGenProgram.enableTexture(LLShaderMgr::REFLECTION_PROBES, LLTexUnit::TT_CUBE_MAP_ARRAY);
            mTexture->bind(channel);
            gRadianceGenProgram.uniform1i(sSourceIdx, sourceIdx);
            gRadianceGenProgram.uniform1f(LLShaderMgr::REFLECTION_PROBE_MAX_LOD, mMaxProbeLOD);
            gRadianceGenProgram.uniform1f(LLShaderMgr::REFLECTION_PROBE_STRENGTH, mHeroProbeStrength);
            
            U32 res = mMipChain[0].getWidth();

            for (int i = 0; i < mMipChain.size(); ++i)
            {
                LL_PROFILE_GPU_ZONE("probe radiance gen");
                static LLStaticHashedString sMipLevel("mipLevel");
                static LLStaticHashedString sRoughness("roughness");
                static LLStaticHashedString sWidth("u_width");
                static LLStaticHashedString sStrength("probe_strength");

                gRadianceGenProgram.uniform1f(sRoughness, (F32)i / (F32)(mMipChain.size() - 1));
                gRadianceGenProgram.uniform1f(sMipLevel, i);
                gRadianceGenProgram.uniform1i(sWidth, mProbeResolution);
                gRadianceGenProgram.uniform1f(sStrength, 1);

                for (int cf = 0; cf < 6; ++cf)
                { // for each cube face
                    LLCoordFrame frame;
                    frame.lookAt(LLVector3(0, 0, 0), LLCubeMapArray::sClipToCubeLookVecs[cf], LLCubeMapArray::sClipToCubeUpVecs[cf]);

                    F32 mat[16];
                    frame.getOpenGLRotation(mat);
                    gGL.loadMatrix(mat);

                    mVertexBuffer->drawArrays(gGL.TRIANGLE_STRIP, 0, 4);

                    glCopyTexSubImage3D(GL_TEXTURE_CUBE_MAP_ARRAY, i, 0, 0, probe->mCubeIndex * 6 + cf, 0, 0, res, res);
                }

                if (i != mMipChain.size() - 1)
                {
                    res /= 2;
                    glViewport(0, 0, res, res);
                }
            }

            gRadianceGenProgram.unbind();
        }

        mMipChain[0].flush();
    }
}

void LLHeroProbeManager::updateUniforms()
{
    if (!LLPipeline::sReflectionProbesEnabled)
    {
        return;
    }

    LL_PROFILE_ZONE_SCOPED_CATEGORY_DISPLAY;
    
    struct HeroProbeData
    {
        LLVector4 heroPosition[1];
        GLint heroProbeCount = 1;
    };
    
    HeroProbeData hpd;
    
    LLMatrix4a modelview;
    modelview.loadu(gGLModelView);
    LLVector4a oa; // scratch space for transformed origin
    oa.set(0, 0, 0, 0);
    hpd.heroProbeCount = 1;
    modelview.affineTransform(mProbes[0]->mOrigin, oa);
    hpd.heroPosition[0].set(oa.getF32ptr());

    //copy rpd into uniform buffer object
    if (mUBO == 0)
    {
        glGenBuffers(1, &mUBO);
    }

    {
        LL_PROFILE_ZONE_NAMED_CATEGORY_DISPLAY("rmmsu - update buffer");
        glBindBuffer(GL_UNIFORM_BUFFER, mUBO);
        glBufferData(GL_UNIFORM_BUFFER, sizeof(HeroProbeData), &hpd, GL_STREAM_DRAW);
        glBindBuffer(GL_UNIFORM_BUFFER, 0);
    }
}

void LLHeroProbeManager::setUniforms()
{
    if (!LLPipeline::sReflectionProbesEnabled)
    {
        return;
    }

    if (mUBO == 0)
    { 
        updateUniforms();
    }
    glBindBufferBase(GL_UNIFORM_BUFFER, 1, mUBO);
}

void LLHeroProbeManager::renderDebug()
{
    gDebugProgram.bind();

    for (auto& probe : mProbes)
    {
        renderReflectionProbe(probe);
    }

    gDebugProgram.unbind();
}

void LLHeroProbeManager::initReflectionMaps()
{
    U32 count = LL_MAX_HERO_PROBE_COUNT;

    if (mTexture.isNull() || mReflectionProbeCount != count || mReset)
    {
        mReset = false;
        mReflectionProbeCount = count;
        mProbeResolution      = gSavedSettings.getS32("RenderHeroProbeResolution");
        mMaxProbeLOD = log2f(mProbeResolution) - 1.f; // number of mips - 1

        mTexture = new LLCubeMapArray();

        // store mReflectionProbeCount+2 cube maps, final two cube maps are used for render target and radiance map generation source)
        mTexture->allocate(mProbeResolution, 3, mReflectionProbeCount + 2);

        if (mDefaultProbe.isNull())
        {
            llassert(mProbes.empty()); // default probe MUST be the first probe created
            mDefaultProbe = new LLReflectionMap();
            mProbes.push_back(mDefaultProbe);
        }

        llassert(mProbes[0] == mDefaultProbe);

        // For hero probes, we treat this as the main mirror probe.
        
        mDefaultProbe->mCubeIndex = 0;
        mDefaultProbe->mCubeArray = mTexture;
        mDefaultProbe->mDistance  = gSavedSettings.getF32("RenderHeroProbeDistance");
        mDefaultProbe->mRadius = 4096.f;
        mDefaultProbe->mProbeIndex = 0;
        touch_default_probe(mDefaultProbe);
        
        mProbes.push_back(mDefaultProbe);
    }

    if (mVertexBuffer.isNull())
    {
        U32 mask = LLVertexBuffer::MAP_VERTEX;
        LLPointer<LLVertexBuffer> buff = new LLVertexBuffer(mask);
        buff->allocateBuffer(4, 0);

        LLStrider<LLVector3> v;
        
        buff->getVertexStrider(v);
        
        v[0] = LLVector3(-1, -1, -1);
        v[1] = LLVector3(1, -1, -1);
        v[2] = LLVector3(-1, 1, -1);
        v[3] = LLVector3(1, 1, -1);

        buff->unmapBuffer();

        mVertexBuffer = buff;
    }
}

void LLHeroProbeManager::cleanup() 
{ 
    mVertexBuffer = nullptr;
    mRenderTarget.release();
    mHeroRenderTarget.release();

    mMipChain.clear();

    mTexture = nullptr;

    mProbes.clear();

    mReflectionMaps.clear();
    
    mDefaultProbe = nullptr;
    mUpdatingProbe = nullptr;

    glDeleteBuffers(1, &mUBO);
    mUBO = 0;
    
    mHeroVOList.clear();
    mNearestHero = nullptr;
}

void LLHeroProbeManager::doOcclusion()
{
    LLVector4a eye;
    eye.load3(LLViewerCamera::instance().getOrigin().mV);

    for (auto& probe : mProbes)
    {
        if (probe != nullptr && probe != mDefaultProbe)
        {
            probe->doOcclusion(eye);
        }
    }
}

void LLHeroProbeManager::registerHeroDrawable(LLVOVolume* drawablep)
{
    if (mHeroVOList.find(drawablep) == mHeroVOList.end())
    {
        mHeroVOList.insert(drawablep);
        LL_INFOS() << "Mirror drawable registered." << LL_ENDL;
    }
}

void LLHeroProbeManager::unregisterHeroDrawable(LLVOVolume* drawablep)
{
    if (mHeroVOList.find(drawablep) != mHeroVOList.end())
    {
        mHeroVOList.erase(drawablep);
    }
}

bool LLHeroProbeManager::isViableMirror(LLFace* face) const
{
    return face == mCurrentFace;
}