llvowlsky.cpp
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- /**
- * @file llvowlsky.cpp
- * @brief LLVOWLSky class implementation
- *
- * $LicenseInfo:firstyear=2007&license=viewergpl$
- *
- * Copyright (c) 2007-2010, Linden Research, Inc.
- *
- * Second Life Viewer Source Code
- * The source code in this file ("Source Code") is provided by Linden Lab
- * to you under the terms of the GNU General Public License, version 2.0
- * ("GPL"), unless you have obtained a separate licensing agreement
- * ("Other License"), formally executed by you and Linden Lab. Terms of
- * the GPL can be found in doc/GPL-license.txt in this distribution, or
- * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
- *
- * There are special exceptions to the terms and conditions of the GPL as
- * it is applied to this Source Code. View the full text of the exception
- * in the file doc/FLOSS-exception.txt in this software distribution, or
- * online at
- * http://secondlifegrid.net/programs/open_source/licensing/flossexception
- *
- * By copying, modifying or distributing this software, you acknowledge
- * that you have read and understood your obligations described above,
- * and agree to abide by those obligations.
- *
- * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
- * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
- * COMPLETENESS OR PERFORMANCE.
- * $/LicenseInfo$
- */
- #include "llviewerprecompiledheaders.h"
- #include "pipeline.h"
- #include "llvowlsky.h"
- #include "llsky.h"
- #include "lldrawpoolwlsky.h"
- #include "llface.h"
- #include "llwlparammanager.h"
- #include "llviewercontrol.h"
- #define DOME_SLICES 1
- const F32 LLVOWLSky::DISTANCE_TO_STARS = (HORIZON_DIST - 10.f)*0.25f;
- const U32 LLVOWLSky::MIN_SKY_DETAIL = 3;
- const U32 LLVOWLSky::MAX_SKY_DETAIL = 180;
- inline U32 LLVOWLSky::getNumStacks(void)
- {
- return llmin(MAX_SKY_DETAIL, llmax(MIN_SKY_DETAIL, gSavedSettings.getU32("WLSkyDetail")));
- }
- inline U32 LLVOWLSky::getNumSlices(void)
- {
- return 2 * llmin(MAX_SKY_DETAIL, llmax(MIN_SKY_DETAIL, gSavedSettings.getU32("WLSkyDetail")));
- }
- inline U32 LLVOWLSky::getFanNumVerts(void)
- {
- return getNumSlices() + 1;
- }
- inline U32 LLVOWLSky::getFanNumIndices(void)
- {
- return getNumSlices() * 3;
- }
- inline U32 LLVOWLSky::getStripsNumVerts(void)
- {
- return (getNumStacks() - 1) * getNumSlices();
- }
- inline U32 LLVOWLSky::getStripsNumIndices(void)
- {
- return 2 * ((getNumStacks() - 2) * (getNumSlices() + 1)) + 1 ;
- }
- inline U32 LLVOWLSky::getStarsNumVerts(void)
- {
- return 1000;
- }
- inline U32 LLVOWLSky::getStarsNumIndices(void)
- {
- return 1000;
- }
- LLVOWLSky::LLVOWLSky(const LLUUID &id, const LLPCode pcode, LLViewerRegion *regionp)
- : LLStaticViewerObject(id, pcode, regionp, TRUE)
- {
- initStars();
- }
- void LLVOWLSky::initSunDirection(LLVector3 const & sun_direction,
- LLVector3 const & sun_angular_velocity)
- {
- }
- BOOL LLVOWLSky::idleUpdate(LLAgent &agent, LLWorld &world, const F64 &time)
- {
- return TRUE;
- }
- BOOL LLVOWLSky::isActive(void) const
- {
- return FALSE;
- }
- LLDrawable * LLVOWLSky::createDrawable(LLPipeline * pipeline)
- {
- pipeline->allocDrawable(this);
- //LLDrawPoolWLSky *poolp = static_cast<LLDrawPoolWLSky *>(
- gPipeline.getPool(LLDrawPool::POOL_WL_SKY);
- mDrawable->setRenderType(LLPipeline::RENDER_TYPE_WL_SKY);
- return mDrawable;
- }
- inline F32 LLVOWLSky::calcPhi(U32 i)
- {
- // i should range from [0..SKY_STACKS] so t will range from [0.f .. 1.f]
- F32 t = float(i) / float(getNumStacks());
- // ^4 the parameter of the tesselation to bias things toward 0 (the dome's apex)
- t = t*t*t*t;
-
- // invert and square the parameter of the tesselation to bias things toward 1 (the horizon)
- t = 1.f - t;
- t = t*t;
- t = 1.f - t;
- return (F_PI / 8.f) * t;
- }
- #if !DOME_SLICES
- static const F32 Q = (1.f + sqrtf(5.f))/2.f; //golden ratio
- //icosahedron verts (based on asset b0c7b76e-28c6-1f87-a1de-752d5e3cd264, contact Runitai Linden for a copy)
- static const LLVector3 icosahedron_vert[] =
- {
- LLVector3(0,1.f,Q),
- LLVector3(0,-1.f,Q),
- LLVector3(0,-1.f,-Q),
- LLVector3(0,1.f,-Q),
- LLVector3(Q,0,1.f),
- LLVector3(-Q,0,1.f),
- LLVector3(-Q,0,-1.f),
- LLVector3(Q,0,-1.f),
- LLVector3(1,-Q,0.f),
- LLVector3(-1,-Q,0.f),
- LLVector3(-1,Q,0.f),
- LLVector3(1,Q,0.f),
- };
- //indices
- static const U32 icosahedron_ind[] =
- {
- 5,0,1,
- 10,0,5,
- 5,1,9,
- 10,5,6,
- 6,5,9,
- 11,0,10,
- 3,11,10,
- 3,10,6,
- 3,6,2,
- 7,3,2,
- 8,7,2,
- 4,7,8,
- 1,4,8,
- 9,8,2,
- 9,2,6,
- 11,3,7,
- 4,0,11,
- 4,11,7,
- 1,0,4,
- 1,8,9,
- };
- //split every triangle in LLVertexBuffer into even fourths (assumes index triangle lists)
- void subdivide(LLVertexBuffer& in, LLVertexBuffer* ret)
- {
- S32 tri_in = in.getNumIndices()/3;
- ret->allocateBuffer(tri_in*4*3, tri_in*4*3, TRUE);
- LLStrider<LLVector3> vin, vout;
- LLStrider<U16> indin, indout;
- ret->getVertexStrider(vout);
- in.getVertexStrider(vin);
- ret->getIndexStrider(indout);
- in.getIndexStrider(indin);
-
-
- for (S32 i = 0; i < tri_in; i++)
- {
- LLVector3 v0 = vin[*indin++];
- LLVector3 v1 = vin[*indin++];
- LLVector3 v2 = vin[*indin++];
- LLVector3 v3 = (v0 + v1) * 0.5f;
- LLVector3 v4 = (v1 + v2) * 0.5f;
- LLVector3 v5 = (v2 + v0) * 0.5f;
- *vout++ = v0;
- *vout++ = v3;
- *vout++ = v5;
- *vout++ = v3;
- *vout++ = v4;
- *vout++ = v5;
- *vout++ = v3;
- *vout++ = v1;
- *vout++ = v4;
- *vout++ = v5;
- *vout++ = v4;
- *vout++ = v2;
- }
-
- for (S32 i = 0; i < ret->getNumIndices(); i++)
- {
- *indout++ = i;
- }
- }
- void chop(LLVertexBuffer& in, LLVertexBuffer* out)
- {
- //chop off all triangles below horizon
- F32 d = LLWLParamManager::sParamMgr->getDomeOffset() * LLWLParamManager::sParamMgr->getDomeRadius();
-
- std::vector<LLVector3> vert;
-
- LLStrider<LLVector3> vin;
- LLStrider<U16> index;
- in.getVertexStrider(vin);
- in.getIndexStrider(index);
- U32 tri_count = in.getNumIndices()/3;
- for (U32 i = 0; i < tri_count; i++)
- {
- LLVector3 &v1 = vin[index[i*3+0]];
- LLVector3 &v2 = vin[index[i*3+1]];
- LLVector3 &v3 = vin[index[i*3+2]];
- if (v1.mV[1] > d ||
- v2.mV[1] > d ||
- v3.mV[1] > d)
- {
- v1.mV[1] = llmax(v1.mV[1], d);
- v2.mV[1] = llmax(v1.mV[1], d);
- v3.mV[1] = llmax(v1.mV[1], d);
- vert.push_back(v1);
- vert.push_back(v2);
- vert.push_back(v3);
- }
- }
- out->allocateBuffer(vert.size(), vert.size(), TRUE);
- LLStrider<LLVector3> vout;
- out->getVertexStrider(vout);
- out->getIndexStrider(index);
- for (U32 i = 0; i < vert.size(); i++)
- {
- *vout++ = vert[i];
- *index++ = i;
- }
- }
- #endif // !DOME_SLICES
- void LLVOWLSky::resetVertexBuffers()
- {
- mFanVerts = NULL;
- mStripsVerts.clear();
- mStarsVerts = NULL;
- gPipeline.markRebuild(mDrawable, LLDrawable::REBUILD_ALL, TRUE);
- }
-
- void LLVOWLSky::cleanupGL()
- {
- mFanVerts = NULL;
- mStripsVerts.clear();
- mStarsVerts = NULL;
- LLDrawPoolWLSky::cleanupGL();
- }
- void LLVOWLSky::restoreGL()
- {
- LLDrawPoolWLSky::restoreGL();
- gPipeline.markRebuild(mDrawable, LLDrawable::REBUILD_ALL, TRUE);
- }
- static LLFastTimer::DeclareTimer FTM_GEO_SKY("Sky Geometry");
- BOOL LLVOWLSky::updateGeometry(LLDrawable * drawable)
- {
- LLFastTimer ftm(FTM_GEO_SKY);
- LLStrider<LLVector3> vertices;
- LLStrider<LLVector2> texCoords;
- LLStrider<U16> indices;
- #if DOME_SLICES
- {
- mFanVerts = new LLVertexBuffer(LLDrawPoolWLSky::SKY_VERTEX_DATA_MASK, GL_STATIC_DRAW_ARB);
- mFanVerts->allocateBuffer(getFanNumVerts(), getFanNumIndices(), TRUE);
- BOOL success = mFanVerts->getVertexStrider(vertices)
- && mFanVerts->getTexCoord0Strider(texCoords)
- && mFanVerts->getIndexStrider(indices);
- if(!success)
- {
- llerrs << "Failed updating WindLight sky geometry." << llendl;
- }
- buildFanBuffer(vertices, texCoords, indices);
- mFanVerts->setBuffer(0);
- }
- {
- const U32 max_buffer_bytes = gSavedSettings.getS32("RenderMaxVBOSize")*1024;
- const U32 data_mask = LLDrawPoolWLSky::SKY_VERTEX_DATA_MASK;
- const U32 max_verts = max_buffer_bytes / LLVertexBuffer::calcStride(data_mask);
- const U32 total_stacks = getNumStacks();
- const U32 verts_per_stack = getNumSlices();
- // each seg has to have one more row of verts than it has stacks
- // then round down
- const U32 stacks_per_seg = (max_verts - verts_per_stack) / verts_per_stack;
- // round up to a whole number of segments
- const U32 strips_segments = (total_stacks+stacks_per_seg-1) / stacks_per_seg;
- llinfos << "WL Skydome strips in " << strips_segments << " batches." << llendl;
- mStripsVerts.resize(strips_segments, NULL);
- for (U32 i = 0; i < strips_segments ;++i)
- {
- LLVertexBuffer * segment = new LLVertexBuffer(LLDrawPoolWLSky::SKY_VERTEX_DATA_MASK, GL_STATIC_DRAW_ARB);
- mStripsVerts[i] = segment;
- U32 num_stacks_this_seg = stacks_per_seg;
- if ((i == strips_segments - 1) && (total_stacks % stacks_per_seg) != 0)
- {
- // for the last buffer only allocate what we'll use
- num_stacks_this_seg = total_stacks % stacks_per_seg;
- }
- // figure out what range of the sky we're filling
- const U32 begin_stack = i * stacks_per_seg;
- const U32 end_stack = begin_stack + num_stacks_this_seg;
- llassert(end_stack <= total_stacks);
- const U32 num_verts_this_seg = verts_per_stack * (num_stacks_this_seg+1);
- llassert(num_verts_this_seg <= max_verts);
- const U32 num_indices_this_seg = 1+num_stacks_this_seg*(2+2*verts_per_stack);
- llassert(num_indices_this_seg * sizeof(U16) <= max_buffer_bytes);
- segment->allocateBuffer(num_verts_this_seg, num_indices_this_seg, TRUE);
- // lock the buffer
- BOOL success = segment->getVertexStrider(vertices)
- && segment->getTexCoord0Strider(texCoords)
- && segment->getIndexStrider(indices);
- if(!success)
- {
- llerrs << "Failed updating WindLight sky geometry." << llendl;
- }
- // fill it
- buildStripsBuffer(begin_stack, end_stack, vertices, texCoords, indices);
- // and unlock the buffer
- segment->setBuffer(0);
- }
- }
- #else
- mStripsVerts = new LLVertexBuffer(LLDrawPoolWLSky::SKY_VERTEX_DATA_MASK, GL_STATIC_DRAW_ARB);
-
- const F32 RADIUS = LLWLParamManager::sParamMgr->getDomeRadius();
- LLPointer<LLVertexBuffer> temp = new LLVertexBuffer(LLVertexBuffer::MAP_VERTEX, 0);
- temp->allocateBuffer(12, 60, TRUE);
- BOOL success = temp->getVertexStrider(vertices)
- && temp->getIndexStrider(indices);
- if (success)
- {
- for (U32 i = 0; i < 12; i++)
- {
- *vertices++ = icosahedron_vert[i];
- }
- for (U32 i = 0; i < 60; i++)
- {
- *indices++ = icosahedron_ind[i];
- }
- }
- LLPointer<LLVertexBuffer> temp2;
-
- for (U32 i = 0; i < 8; i++)
- {
- temp2 = new LLVertexBuffer(LLVertexBuffer::MAP_VERTEX, 0);
- subdivide(*temp, temp2);
- temp = temp2;
- }
-
- temp->getVertexStrider(vertices);
- for (S32 i = 0; i < temp->getNumVerts(); i++)
- {
- LLVector3 v = vertices[i];
- v.normVec();
- vertices[i] = v*RADIUS;
- }
- temp2 = new LLVertexBuffer(LLVertexBuffer::MAP_VERTEX, 0);
- chop(*temp, temp2);
- mStripsVerts->allocateBuffer(temp2->getNumVerts(), temp2->getNumIndices(), TRUE);
-
- success = mStripsVerts->getVertexStrider(vertices)
- && mStripsVerts->getTexCoordStrider(texCoords)
- && mStripsVerts->getIndexStrider(indices);
- LLStrider<LLVector3> v;
- temp2->getVertexStrider(v);
- LLStrider<U16> ind;
- temp2->getIndexStrider(ind);
- if (success)
- {
- for (S32 i = 0; i < temp2->getNumVerts(); ++i)
- {
- LLVector3 vert = *v++;
- vert.normVec();
- F32 z0 = vert.mV[2];
- F32 x0 = vert.mV[0];
-
- vert *= RADIUS;
-
- *vertices++ = vert;
- *texCoords++ = LLVector2((-z0 + 1.f) / 2.f, (-x0 + 1.f) / 2.f);
- }
- for (S32 i = 0; i < temp2->getNumIndices(); ++i)
- {
- *indices++ = *ind++;
- }
- }
- mStripsVerts->setBuffer(0);
- #endif
- updateStarColors();
- updateStarGeometry(drawable);
- LLPipeline::sCompiles++;
- return TRUE;
- }
- void LLVOWLSky::drawStars(void)
- {
- // render the stars as a sphere centered at viewer camera
- if (mStarsVerts.notNull())
- {
- mStarsVerts->setBuffer(LLDrawPoolWLSky::STAR_VERTEX_DATA_MASK);
- mStarsVerts->drawArrays(LLRender::QUADS, 0, getStarsNumVerts()*4);
- }
- }
- void LLVOWLSky::drawDome(void)
- {
- if (mStripsVerts.empty())
- {
- updateGeometry(mDrawable);
- }
- LLGLDepthTest gls_depth(GL_TRUE, GL_FALSE);
- const U32 data_mask = LLDrawPoolWLSky::SKY_VERTEX_DATA_MASK;
-
- #if DOME_SLICES
- std::vector< LLPointer<LLVertexBuffer> >::const_iterator strips_vbo_iter, end_strips;
- end_strips = mStripsVerts.end();
- for(strips_vbo_iter = mStripsVerts.begin(); strips_vbo_iter != end_strips; ++strips_vbo_iter)
- {
- LLVertexBuffer * strips_segment = strips_vbo_iter->get();
- strips_segment->setBuffer(data_mask);
- strips_segment->drawRange(
- LLRender::TRIANGLE_STRIP,
- 0, strips_segment->getRequestedVerts()-1, strips_segment->getRequestedIndices(),
- 0);
- gPipeline.addTrianglesDrawn(strips_segment->getRequestedIndices() - 2);
- }
- #else
- mStripsVerts->setBuffer(data_mask);
- glDrawRangeElements(
- GL_TRIANGLES,
- 0, mStripsVerts->getNumVerts()-1, mStripsVerts->getNumIndices(),
- GL_UNSIGNED_SHORT,
- mStripsVerts->getIndicesPointer());
- #endif
- LLVertexBuffer::unbind();
- }
- void LLVOWLSky::initStars()
- {
- // Initialize star map
- mStarVertices.resize(getStarsNumVerts());
- mStarColors.resize(getStarsNumVerts());
- mStarIntensities.resize(getStarsNumVerts());
- std::vector<LLVector3>::iterator v_p = mStarVertices.begin();
- std::vector<LLColor4>::iterator v_c = mStarColors.begin();
- std::vector<F32>::iterator v_i = mStarIntensities.begin();
- U32 i;
- for (i = 0; i < getStarsNumVerts(); ++i)
- {
- v_p->mV[VX] = ll_frand() - 0.5f;
- v_p->mV[VY] = ll_frand() - 0.5f;
-
- // we only want stars on the top half of the dome!
- v_p->mV[VZ] = ll_frand()/2.f;
- v_p->normVec();
- *v_p *= DISTANCE_TO_STARS;
- *v_i = llmin((F32)pow(ll_frand(),2.f) + 0.1f, 1.f);
- v_c->mV[VRED] = 0.75f + ll_frand() * 0.25f ;
- v_c->mV[VGREEN] = 1.f ;
- v_c->mV[VBLUE] = 0.75f + ll_frand() * 0.25f ;
- v_c->mV[VALPHA] = 1.f;
- v_c->clamp();
- v_p++;
- v_c++;
- v_i++;
- }
- }
- void LLVOWLSky::buildFanBuffer(LLStrider<LLVector3> & vertices,
- LLStrider<LLVector2> & texCoords,
- LLStrider<U16> & indices)
- {
- const F32 RADIUS = LLWLParamManager::instance()->getDomeRadius();
- U32 i, num_slices;
- F32 phi0, theta, x0, y0, z0;
- // paranoia checking for SL-55986/SL-55833
- U32 count_verts = 0;
- U32 count_indices = 0;
- // apex
- *vertices++ = LLVector3(0.f, RADIUS, 0.f);
- *texCoords++ = LLVector2(0.5f, 0.5f);
- ++count_verts;
- num_slices = getNumSlices();
- // and fan in a circle around the apex
- phi0 = calcPhi(1);
- for(i = 0; i < num_slices; ++i) {
- theta = 2.f * F_PI * float(i) / float(num_slices);
- // standard transformation from spherical to
- // rectangular coordinates
- x0 = sin(phi0) * cos(theta);
- y0 = cos(phi0);
- z0 = sin(phi0) * sin(theta);
- *vertices++ = LLVector3(x0 * RADIUS, y0 * RADIUS, z0 * RADIUS);
- // generate planar uv coordinates
- // note: x and z are transposed in order for things to animate
- // correctly in the global coordinate system where +x is east and
- // +y is north
- *texCoords++ = LLVector2((-z0 + 1.f) / 2.f, (-x0 + 1.f) / 2.f);
- ++count_verts;
- if (i > 0)
- {
- *indices++ = 0;
- *indices++ = i;
- *indices++ = i+1;
- count_indices += 3;
- }
- }
- // the last vertex of the last triangle should wrap around to
- // the beginning
- *indices++ = 0;
- *indices++ = num_slices;
- *indices++ = 1;
- count_indices += 3;
- // paranoia checking for SL-55986/SL-55833
- llassert(getFanNumVerts() == count_verts);
- llassert(getFanNumIndices() == count_indices);
- }
- void LLVOWLSky::buildStripsBuffer(U32 begin_stack, U32 end_stack,
- LLStrider<LLVector3> & vertices,
- LLStrider<LLVector2> & texCoords,
- LLStrider<U16> & indices)
- {
- const F32 RADIUS = LLWLParamManager::instance()->getDomeRadius();
- U32 i, j, num_slices, num_stacks;
- F32 phi0, theta, x0, y0, z0;
- // paranoia checking for SL-55986/SL-55833
- U32 count_verts = 0;
- U32 count_indices = 0;
- num_slices = getNumSlices();
- num_stacks = getNumStacks();
- llassert(end_stack <= num_stacks);
- // stacks are iterated one-indexed since phi(0) was handled by the fan above
- for(i = begin_stack + 1; i <= end_stack+1; ++i)
- {
- phi0 = calcPhi(i);
- for(j = 0; j < num_slices; ++j)
- {
- theta = F_TWO_PI * (float(j) / float(num_slices));
- // standard transformation from spherical to
- // rectangular coordinates
- x0 = sin(phi0) * cos(theta);
- y0 = cos(phi0);
- z0 = sin(phi0) * sin(theta);
- if (i == num_stacks-2)
- {
- *vertices++ = LLVector3(x0*RADIUS, y0*RADIUS-1024.f*2.f, z0*RADIUS);
- }
- else if (i == num_stacks-1)
- {
- *vertices++ = LLVector3(0, y0*RADIUS-1024.f*2.f, 0);
- }
- else
- {
- *vertices++ = LLVector3(x0 * RADIUS, y0 * RADIUS, z0 * RADIUS);
- }
- ++count_verts;
- // generate planar uv coordinates
- // note: x and z are transposed in order for things to animate
- // correctly in the global coordinate system where +x is east and
- // +y is north
- *texCoords++ = LLVector2((-z0 + 1.f) / 2.f, (-x0 + 1.f) / 2.f);
- }
- }
- //build triangle strip...
- *indices++ = 0 ;
- count_indices++ ;
- S32 k = 0 ;
- for(i = 1; i <= end_stack - begin_stack; ++i)
- {
- *indices++ = i * num_slices + k ;
- count_indices++ ;
- k = (k+1) % num_slices ;
- for(j = 0; j < num_slices ; ++j)
- {
- *indices++ = (i-1) * num_slices + k ;
- *indices++ = i * num_slices + k ;
- count_indices += 2 ;
- k = (k+1) % num_slices ;
- }
- if((--k) < 0)
- {
- k = num_slices - 1 ;
- }
- *indices++ = i * num_slices + k ;
- count_indices++ ;
- }
- }
- void LLVOWLSky::updateStarColors()
- {
- std::vector<LLColor4>::iterator v_c = mStarColors.begin();
- std::vector<F32>::iterator v_i = mStarIntensities.begin();
- std::vector<LLVector3>::iterator v_p = mStarVertices.begin();
- const F32 var = 0.15f;
- const F32 min = 0.5f; //0.75f;
- const F32 sunclose_max = 0.6f;
- const F32 sunclose_range = 1 - sunclose_max;
- //F32 below_horizon = - llmin(0.0f, gSky.mVOSkyp->getToSunLast().mV[2]);
- //F32 brightness_factor = llmin(1.0f, below_horizon * 20);
- static S32 swap = 0;
- swap++;
- if ((swap % 2) == 1)
- {
- F32 intensity; // max intensity of each star
- U32 x;
- for (x = 0; x < getStarsNumVerts(); ++x)
- {
- F32 sundir_factor = 1;
- LLVector3 tostar = *v_p;
- tostar.normVec();
- const F32 how_close_to_sun = tostar * gSky.mVOSkyp->getToSunLast();
- if (how_close_to_sun > sunclose_max)
- {
- sundir_factor = (1 - how_close_to_sun) / sunclose_range;
- }
- intensity = *(v_i);
- F32 alpha = v_c->mV[VALPHA] + (ll_frand() - 0.5f) * var * intensity;
- if (alpha < min * intensity)
- {
- alpha = min * intensity;
- }
- if (alpha > intensity)
- {
- alpha = intensity;
- }
- //alpha *= brightness_factor * sundir_factor;
- alpha = llclamp(alpha, 0.f, 1.f);
- v_c->mV[VALPHA] = alpha;
- v_c++;
- v_i++;
- v_p++;
- }
- }
- }
- BOOL LLVOWLSky::updateStarGeometry(LLDrawable *drawable)
- {
- LLStrider<LLVector3> verticesp;
- LLStrider<LLColor4U> colorsp;
- LLStrider<LLVector2> texcoordsp;
- if (mStarsVerts.isNull())
- {
- mStarsVerts = new LLVertexBuffer(LLDrawPoolWLSky::STAR_VERTEX_DATA_MASK, GL_DYNAMIC_DRAW);
- mStarsVerts->allocateBuffer(getStarsNumVerts()*4, 0, TRUE);
- }
-
- BOOL success = mStarsVerts->getVertexStrider(verticesp)
- && mStarsVerts->getColorStrider(colorsp)
- && mStarsVerts->getTexCoord0Strider(texcoordsp);
- if(!success)
- {
- llerrs << "Failed updating star geometry." << llendl;
- }
- // *TODO: fix LLStrider with a real prefix increment operator so it can be
- // used as a model of OutputIterator. -Brad
- // std::copy(mStarVertices.begin(), mStarVertices.end(), verticesp);
- if (mStarVertices.size() < getStarsNumVerts())
- {
- llerrs << "Star reference geometry insufficient." << llendl;
- }
- for (U32 vtx = 0; vtx < getStarsNumVerts(); ++vtx)
- {
- LLVector3 at = mStarVertices[vtx];
- at.normVec();
- LLVector3 left = at%LLVector3(0,0,1);
- LLVector3 up = at%left;
- F32 sc = 0.5f+ll_frand()*1.25f;
- left *= sc;
- up *= sc;
- *(verticesp++) = mStarVertices[vtx];
- *(verticesp++) = mStarVertices[vtx]+left;
- *(verticesp++) = mStarVertices[vtx]+left+up;
- *(verticesp++) = mStarVertices[vtx]+up;
- *(texcoordsp++) = LLVector2(0,0);
- *(texcoordsp++) = LLVector2(0,1);
- *(texcoordsp++) = LLVector2(1,1);
- *(texcoordsp++) = LLVector2(1,0);
- *(colorsp++) = LLColor4U(mStarColors[vtx]);
- *(colorsp++) = LLColor4U(mStarColors[vtx]);
- *(colorsp++) = LLColor4U(mStarColors[vtx]);
- *(colorsp++) = LLColor4U(mStarColors[vtx]);
- }
- mStarsVerts->setBuffer(0);
- return TRUE;
- }