/** * @file llsurfacepatch.cpp * @brief LLSurfacePatch class implementation * * $LicenseInfo:firstyear=2001&license=viewerlgpl$ * Second Life Viewer Source Code * Copyright (C) 2010, 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 "llsurfacepatch.h" #include "llpatchvertexarray.h" #include "llviewerobjectlist.h" #include "llvosurfacepatch.h" #include "llsurface.h" #include "pipeline.h" #include "llagent.h" #include "llsky.h" #include "llviewercamera.h" // For getting composition values #include "llviewerregion.h" #include "llvlcomposition.h" #include "lldrawpool.h" #include "noise.h" extern bool gShiftFrame; extern U64MicrosecondsImplicit gFrameTime; extern LLPipeline gPipeline; LLSurfacePatch::LLSurfacePatch() : mHasReceivedData(FALSE), mSTexUpdate(FALSE), mDirty(FALSE), mDirtyZStats(TRUE), mHeightsGenerated(FALSE), mDataOffset(0), mDataZ(NULL), mDataNorm(NULL), mVObjp(NULL), mOriginRegion(0.f, 0.f, 0.f), mCenterRegion(0.f, 0.f, 0.f), mMinZ(0.f), mMaxZ(0.f), mMeanZ(0.f), mRadius(0.f), mMinComposition(0.f), mMaxComposition(0.f), mMeanComposition(0.f), // This flag is used to communicate between adjacent surfaces and is // set to non-zero values by higher classes. mConnectedEdge(NO_EDGE), mLastUpdateTime(0), mSurfacep(NULL) { S32 i; for (i = 0; i < 8; i++) { setNeighborPatch(i, NULL); } for (i = 0; i < 9; i++) { mNormalsInvalid[i] = TRUE; } } LLSurfacePatch::~LLSurfacePatch() { mVObjp = NULL; } void LLSurfacePatch::dirty() { // These are outside of the loop in case we're still waiting for a dirty from the // texture being updated... if (mVObjp) { mVObjp->dirtyGeom(); } else { LL_WARNS() << "No viewer object for this surface patch!" << LL_ENDL; } mDirtyZStats = TRUE; mHeightsGenerated = FALSE; if (!mDirty) { mDirty = TRUE; mSurfacep->dirtySurfacePatch(this); } } void LLSurfacePatch::setSurface(LLSurface *surfacep) { mSurfacep = surfacep; if (mVObjp == (LLVOSurfacePatch *)NULL) { llassert(mSurfacep->mType == 'l'); mVObjp = (LLVOSurfacePatch *)gObjectList.createObjectViewer(LLViewerObject::LL_VO_SURFACE_PATCH, mSurfacep->getRegion()); mVObjp->setPatch(this); mVObjp->setPositionRegion(mCenterRegion); gPipeline.createObject(mVObjp); } } void LLSurfacePatch::disconnectNeighbor(LLSurface *surfacep) { U32 i; for (i = 0; i < 8; i++) { if (getNeighborPatch(i)) { if (getNeighborPatch(i)->mSurfacep == surfacep) { setNeighborPatch(i, NULL); mNormalsInvalid[i] = TRUE; } } } // Clean up connected edges if (getNeighborPatch(EAST)) { if (getNeighborPatch(EAST)->mSurfacep == surfacep) { mConnectedEdge &= ~EAST_EDGE; } } if (getNeighborPatch(NORTH)) { if (getNeighborPatch(NORTH)->mSurfacep == surfacep) { mConnectedEdge &= ~NORTH_EDGE; } } if (getNeighborPatch(WEST)) { if (getNeighborPatch(WEST)->mSurfacep == surfacep) { mConnectedEdge &= ~WEST_EDGE; } } if (getNeighborPatch(SOUTH)) { if (getNeighborPatch(SOUTH)->mSurfacep == surfacep) { mConnectedEdge &= ~SOUTH_EDGE; } } } LLVector3 LLSurfacePatch::getPointAgent(const U32 x, const U32 y) const { U32 surface_stride = mSurfacep->getGridsPerEdge(); U32 point_offset = x + y*surface_stride; LLVector3 pos; pos = getOriginAgent(); pos.mV[VX] += x * mSurfacep->getMetersPerGrid(); pos.mV[VY] += y * mSurfacep->getMetersPerGrid(); pos.mV[VZ] = *(mDataZ + point_offset); return pos; } LLVector2 LLSurfacePatch::getTexCoords(const U32 x, const U32 y) const { U32 surface_stride = mSurfacep->getGridsPerEdge(); U32 point_offset = x + y*surface_stride; LLVector3 pos, rel_pos; pos = getOriginAgent(); pos.mV[VX] += x * mSurfacep->getMetersPerGrid(); pos.mV[VY] += y * mSurfacep->getMetersPerGrid(); pos.mV[VZ] = *(mDataZ + point_offset); rel_pos = pos - mSurfacep->getOriginAgent(); rel_pos *= 1.f/surface_stride; return LLVector2(rel_pos.mV[VX], rel_pos.mV[VY]); } void LLSurfacePatch::eval(const U32 x, const U32 y, const U32 stride, LLVector3 *vertex, LLVector3 *normal, LLVector2 *tex0, LLVector2 *tex1) { if (!mSurfacep || !mSurfacep->getRegion() || !mSurfacep->getGridsPerEdge()) { return; // failsafe } llassert_always(vertex && normal && tex0 && tex1); U32 surface_stride = mSurfacep->getGridsPerEdge(); U32 point_offset = x + y*surface_stride; *normal = getNormal(x, y); LLVector3 pos_agent = getOriginAgent(); pos_agent.mV[VX] += x * mSurfacep->getMetersPerGrid(); pos_agent.mV[VY] += y * mSurfacep->getMetersPerGrid(); pos_agent.mV[VZ] = *(mDataZ + point_offset); *vertex = pos_agent-mVObjp->getRegion()->getOriginAgent(); LLVector3 rel_pos = pos_agent - mSurfacep->getOriginAgent(); LLVector3 tex_pos = rel_pos * (1.f/surface_stride); tex0->mV[0] = tex_pos.mV[0]; tex0->mV[1] = tex_pos.mV[1]; tex1->mV[0] = mSurfacep->getRegion()->getCompositionXY(llfloor(mOriginRegion.mV[0])+x, llfloor(mOriginRegion.mV[1])+y); const F32 xyScale = 4.9215f*7.f; //0.93284f; const F32 xyScaleInv = (1.f / xyScale)*(0.2222222222f); F32 vec[3] = { (F32)fmod((F32)(mOriginGlobal.mdV[0] + x)*xyScaleInv, 256.f), (F32)fmod((F32)(mOriginGlobal.mdV[1] + y)*xyScaleInv, 256.f), 0.f }; F32 rand_val = llclamp(noise2(vec)* 0.75f + 0.5f, 0.f, 1.f); tex1->mV[1] = rand_val; } void LLSurfacePatch::calcNormal(const U32 x, const U32 y, const U32 stride) { U32 patch_width = mSurfacep->mPVArray.mPatchWidth; U32 surface_stride = mSurfacep->getGridsPerEdge(); const F32 mpg = mSurfacep->getMetersPerGrid() * stride; S32 poffsets[2][2][2]; poffsets[0][0][0] = x - stride; poffsets[0][0][1] = y - stride; poffsets[0][1][0] = x - stride; poffsets[0][1][1] = y + stride; poffsets[1][0][0] = x + stride; poffsets[1][0][1] = y - stride; poffsets[1][1][0] = x + stride; poffsets[1][1][1] = y + stride; const LLSurfacePatch *ppatches[2][2]; // LLVector3 p1, p2, p3, p4; ppatches[0][0] = this; ppatches[0][1] = this; ppatches[1][0] = this; ppatches[1][1] = this; U32 i, j; for (i = 0; i < 2; i++) { for (j = 0; j < 2; j++) { if (poffsets[i][j][0] < 0) { if (!ppatches[i][j]->getNeighborPatch(WEST)) { poffsets[i][j][0] = 0; } else { poffsets[i][j][0] += patch_width; ppatches[i][j] = ppatches[i][j]->getNeighborPatch(WEST); } } if (poffsets[i][j][1] < 0) { if (!ppatches[i][j]->getNeighborPatch(SOUTH)) { poffsets[i][j][1] = 0; } else { poffsets[i][j][1] += patch_width; ppatches[i][j] = ppatches[i][j]->getNeighborPatch(SOUTH); } } if (poffsets[i][j][0] >= (S32)patch_width) { if (!ppatches[i][j]->getNeighborPatch(EAST)) { poffsets[i][j][0] = patch_width - 1; } else { poffsets[i][j][0] -= patch_width; ppatches[i][j] = ppatches[i][j]->getNeighborPatch(EAST); } } if (poffsets[i][j][1] >= (S32)patch_width) { if (!ppatches[i][j]->getNeighborPatch(NORTH)) { poffsets[i][j][1] = patch_width - 1; } else { poffsets[i][j][1] -= patch_width; ppatches[i][j] = ppatches[i][j]->getNeighborPatch(NORTH); } } } } LLVector3 p00(-mpg,-mpg, *(ppatches[0][0]->mDataZ + poffsets[0][0][0] + poffsets[0][0][1]*surface_stride)); LLVector3 p01(-mpg,+mpg, *(ppatches[0][1]->mDataZ + poffsets[0][1][0] + poffsets[0][1][1]*surface_stride)); LLVector3 p10(+mpg,-mpg, *(ppatches[1][0]->mDataZ + poffsets[1][0][0] + poffsets[1][0][1]*surface_stride)); LLVector3 p11(+mpg,+mpg, *(ppatches[1][1]->mDataZ + poffsets[1][1][0] + poffsets[1][1][1]*surface_stride)); LLVector3 c1 = p11 - p00; LLVector3 c2 = p01 - p10; LLVector3 normal = c1; normal %= c2; normal.normVec(); llassert(mDataNorm); *(mDataNorm + surface_stride * y + x) = normal; } const LLVector3 &LLSurfacePatch::getNormal(const U32 x, const U32 y) const { U32 surface_stride = mSurfacep->getGridsPerEdge(); llassert(mDataNorm); return *(mDataNorm + surface_stride * y + x); } void LLSurfacePatch::updateCameraDistanceRegion(const LLVector3 &pos_region) { if (LLPipeline::sDynamicLOD) { if (!gShiftFrame) { LLVector3 dv = pos_region; dv -= mCenterRegion; mVisInfo.mDistance = llmax(0.f, (F32)(dv.magVec() - mRadius))/ llmax(LLVOSurfacePatch::sLODFactor, 0.1f); } } else { mVisInfo.mDistance = 0.f; } } F32 LLSurfacePatch::getDistance() const { return mVisInfo.mDistance; } // Called when a patch has changed its height field // data. void LLSurfacePatch::updateVerticalStats() { if (!mDirtyZStats) { return; } U32 grids_per_patch_edge = mSurfacep->getGridsPerPatchEdge(); U32 grids_per_edge = mSurfacep->getGridsPerEdge(); F32 meters_per_grid = mSurfacep->getMetersPerGrid(); U32 i, j, k; F32 z, total; llassert(mDataZ); z = *(mDataZ); mMinZ = z; mMaxZ = z; k = 0; total = 0.0f; // Iterate to +1 because we need to do the edges correctly. for (j=0; j<(grids_per_patch_edge+1); j++) { for (i=0; i<(grids_per_patch_edge+1); i++) { z = *(mDataZ + i + j*grids_per_edge); if (z < mMinZ) { mMinZ = z; } if (z > mMaxZ) { mMaxZ = z; } total += z; k++; } } mMeanZ = total / (F32) k; mCenterRegion.mV[VZ] = 0.5f * (mMinZ + mMaxZ); LLVector3 diam_vec(meters_per_grid*grids_per_patch_edge, meters_per_grid*grids_per_patch_edge, mMaxZ - mMinZ); mRadius = diam_vec.magVec() * 0.5f; mSurfacep->mMaxZ = llmax(mMaxZ, mSurfacep->mMaxZ); mSurfacep->mMinZ = llmin(mMinZ, mSurfacep->mMinZ); mSurfacep->mHasZData = TRUE; mSurfacep->getRegion()->calculateCenterGlobal(); if (mVObjp) { mVObjp->dirtyPatch(); } mDirtyZStats = FALSE; } void LLSurfacePatch::updateNormals() { if (mSurfacep->mType == 'w') { return; } U32 grids_per_patch_edge = mSurfacep->getGridsPerPatchEdge(); U32 grids_per_edge = mSurfacep->getGridsPerEdge(); BOOL dirty_patch = FALSE; U32 i, j; // update the east edge if (mNormalsInvalid[EAST] || mNormalsInvalid[NORTHEAST] || mNormalsInvalid[SOUTHEAST]) { for (j = 0; j <= grids_per_patch_edge; j++) { calcNormal(grids_per_patch_edge, j, 2); calcNormal(grids_per_patch_edge - 1, j, 2); calcNormal(grids_per_patch_edge - 2, j, 2); } dirty_patch = TRUE; } // update the north edge if (mNormalsInvalid[NORTHEAST] || mNormalsInvalid[NORTH] || mNormalsInvalid[NORTHWEST]) { for (i = 0; i <= grids_per_patch_edge; i++) { calcNormal(i, grids_per_patch_edge, 2); calcNormal(i, grids_per_patch_edge - 1, 2); calcNormal(i, grids_per_patch_edge - 2, 2); } dirty_patch = TRUE; } // update the west edge if (mNormalsInvalid[NORTHWEST] || mNormalsInvalid[WEST] || mNormalsInvalid[SOUTHWEST]) { for (j = 0; j < grids_per_patch_edge; j++) { calcNormal(0, j, 2); calcNormal(1, j, 2); } dirty_patch = TRUE; } // update the south edge if (mNormalsInvalid[SOUTHWEST] || mNormalsInvalid[SOUTH] || mNormalsInvalid[SOUTHEAST]) { for (i = 0; i < grids_per_patch_edge; i++) { calcNormal(i, 0, 2); calcNormal(i, 1, 2); } dirty_patch = TRUE; } // Invalidating the northeast corner is different, because depending on what the adjacent neighbors are, // we'll want to do different things. if (mNormalsInvalid[NORTHEAST]) { if (!getNeighborPatch(NORTHEAST)) { if (!getNeighborPatch(NORTH)) { if (!getNeighborPatch(EAST)) { // No north or east neighbors. Pull from the diagonal in your own patch. *(mDataZ + grids_per_patch_edge + grids_per_patch_edge*grids_per_edge) = *(mDataZ + grids_per_patch_edge - 1 + (grids_per_patch_edge - 1)*grids_per_edge); } else { if (getNeighborPatch(EAST)->getHasReceivedData()) { // East, but not north. Pull from your east neighbor's northwest point. *(mDataZ + grids_per_patch_edge + grids_per_patch_edge*grids_per_edge) = *(getNeighborPatch(EAST)->mDataZ + (grids_per_patch_edge - 1)*grids_per_edge); } else { *(mDataZ + grids_per_patch_edge + grids_per_patch_edge*grids_per_edge) = *(mDataZ + grids_per_patch_edge - 1 + (grids_per_patch_edge - 1)*grids_per_edge); } } } else { // We have a north. if (getNeighborPatch(EAST)) { // North and east neighbors, but not northeast. // Pull from diagonal in your own patch. *(mDataZ + grids_per_patch_edge + grids_per_patch_edge*grids_per_edge) = *(mDataZ + grids_per_patch_edge - 1 + (grids_per_patch_edge - 1)*grids_per_edge); } else { if (getNeighborPatch(NORTH)->getHasReceivedData()) { // North, but not east. Pull from your north neighbor's southeast corner. *(mDataZ + grids_per_patch_edge + grids_per_patch_edge*grids_per_edge) = *(getNeighborPatch(NORTH)->mDataZ + (grids_per_patch_edge - 1)); } else { *(mDataZ + grids_per_patch_edge + grids_per_patch_edge*grids_per_edge) = *(mDataZ + grids_per_patch_edge - 1 + (grids_per_patch_edge - 1)*grids_per_edge); } } } } else if (getNeighborPatch(NORTHEAST)->mSurfacep != mSurfacep) { if ( (!getNeighborPatch(NORTH) || (getNeighborPatch(NORTH)->mSurfacep != mSurfacep)) && (!getNeighborPatch(EAST) || (getNeighborPatch(EAST)->mSurfacep != mSurfacep))) { *(mDataZ + grids_per_patch_edge + grids_per_patch_edge*grids_per_edge) = *(getNeighborPatch(NORTHEAST)->mDataZ); } } else { // We've got a northeast patch in the same surface. // The z and normals will be handled by that patch. } calcNormal(grids_per_patch_edge, grids_per_patch_edge, 2); calcNormal(grids_per_patch_edge, grids_per_patch_edge - 1, 2); calcNormal(grids_per_patch_edge - 1, grids_per_patch_edge, 2); calcNormal(grids_per_patch_edge - 1, grids_per_patch_edge - 1, 2); dirty_patch = TRUE; } // update the middle normals if (mNormalsInvalid[MIDDLE]) { for (j=2; j < grids_per_patch_edge - 2; j++) { for (i=2; i < grids_per_patch_edge - 2; i++) { calcNormal(i, j, 2); } } dirty_patch = TRUE; } if (dirty_patch) { mSurfacep->dirtySurfacePatch(this); } for (i = 0; i < 9; i++) { mNormalsInvalid[i] = FALSE; } } void LLSurfacePatch::updateEastEdge() { U32 grids_per_patch_edge = mSurfacep->getGridsPerPatchEdge(); U32 grids_per_edge = mSurfacep->getGridsPerEdge(); U32 j, k; F32 *west_surface, *east_surface; if (!getNeighborPatch(EAST)) { west_surface = mDataZ + grids_per_patch_edge; east_surface = mDataZ + grids_per_patch_edge - 1; } else if (mConnectedEdge & EAST_EDGE) { west_surface = mDataZ + grids_per_patch_edge; east_surface = getNeighborPatch(EAST)->mDataZ; } else { return; } // If patchp is on the east edge of its surface, then we update the east // side buffer for (j=0; j < grids_per_patch_edge; j++) { k = j * grids_per_edge; *(west_surface + k) = *(east_surface + k); // update buffer Z } } void LLSurfacePatch::updateNorthEdge() { U32 grids_per_patch_edge = mSurfacep->getGridsPerPatchEdge(); U32 grids_per_edge = mSurfacep->getGridsPerEdge(); U32 i; F32 *south_surface, *north_surface; if (!getNeighborPatch(NORTH)) { south_surface = mDataZ + grids_per_patch_edge*grids_per_edge; north_surface = mDataZ + (grids_per_patch_edge - 1) * grids_per_edge; } else if (mConnectedEdge & NORTH_EDGE) { south_surface = mDataZ + grids_per_patch_edge*grids_per_edge; north_surface = getNeighborPatch(NORTH)->mDataZ; } else { return; } // Update patchp's north edge ... for (i=0; i<grids_per_patch_edge; i++) { *(south_surface + i) = *(north_surface + i); // update buffer Z } } BOOL LLSurfacePatch::updateTexture() { if (mSTexUpdate) // Update texture as needed { F32 meters_per_grid = getSurface()->getMetersPerGrid(); F32 grids_per_patch_edge = (F32)getSurface()->getGridsPerPatchEdge(); if ((!getNeighborPatch(EAST) || getNeighborPatch(EAST)->getHasReceivedData()) && (!getNeighborPatch(WEST) || getNeighborPatch(WEST)->getHasReceivedData()) && (!getNeighborPatch(SOUTH) || getNeighborPatch(SOUTH)->getHasReceivedData()) && (!getNeighborPatch(NORTH) || getNeighborPatch(NORTH)->getHasReceivedData())) { LLViewerRegion *regionp = getSurface()->getRegion(); LLVector3d origin_region = getOriginGlobal() - getSurface()->getOriginGlobal(); // Have to figure out a better way to deal with these edge conditions... LLVLComposition* comp = regionp->getComposition(); if (!mHeightsGenerated) { F32 patch_size = meters_per_grid*(grids_per_patch_edge+1); if (comp->generateHeights((F32)origin_region[VX], (F32)origin_region[VY], patch_size, patch_size)) { mHeightsGenerated = TRUE; } else { return FALSE; } } if (comp->generateComposition()) { if (mVObjp) { mVObjp->dirtyGeom(); gPipeline.markGLRebuild(mVObjp); return TRUE; } } } return FALSE; } else { return TRUE; } } void LLSurfacePatch::updateGL() { F32 meters_per_grid = getSurface()->getMetersPerGrid(); F32 grids_per_patch_edge = (F32)getSurface()->getGridsPerPatchEdge(); LLViewerRegion *regionp = getSurface()->getRegion(); LLVector3d origin_region = getOriginGlobal() - getSurface()->getOriginGlobal(); LLVLComposition* comp = regionp->getComposition(); updateCompositionStats(); F32 tex_patch_size = meters_per_grid*grids_per_patch_edge; if (comp->generateTexture((F32)origin_region[VX], (F32)origin_region[VY], tex_patch_size, tex_patch_size)) { mSTexUpdate = FALSE; // Also generate the water texture mSurfacep->generateWaterTexture((F32)origin_region.mdV[VX], (F32)origin_region.mdV[VY], tex_patch_size, tex_patch_size); } } void LLSurfacePatch::dirtyZ() { mSTexUpdate = TRUE; // Invalidate all normals in this patch U32 i; for (i = 0; i < 9; i++) { mNormalsInvalid[i] = TRUE; } // Invalidate normals in this and neighboring patches for (i = 0; i < 8; i++) { if (getNeighborPatch(i)) { getNeighborPatch(i)->mNormalsInvalid[gDirOpposite[i]] = TRUE; getNeighborPatch(i)->dirty(); if (i < 4) { getNeighborPatch(i)->mNormalsInvalid[gDirAdjacent[gDirOpposite[i]][0]] = TRUE; getNeighborPatch(i)->mNormalsInvalid[gDirAdjacent[gDirOpposite[i]][1]] = TRUE; } } } dirty(); mLastUpdateTime = gFrameTime; } const U64 &LLSurfacePatch::getLastUpdateTime() const { return mLastUpdateTime; } F32 LLSurfacePatch::getMaxZ() const { return mMaxZ; } F32 LLSurfacePatch::getMinZ() const { return mMinZ; } void LLSurfacePatch::setOriginGlobal(const LLVector3d &origin_global) { mOriginGlobal = origin_global; LLVector3 origin_region; origin_region.setVec(mOriginGlobal - mSurfacep->getOriginGlobal()); mOriginRegion = origin_region; mCenterRegion.mV[VX] = origin_region.mV[VX] + 0.5f*mSurfacep->getGridsPerPatchEdge()*mSurfacep->getMetersPerGrid(); mCenterRegion.mV[VY] = origin_region.mV[VY] + 0.5f*mSurfacep->getGridsPerPatchEdge()*mSurfacep->getMetersPerGrid(); mVisInfo.mbIsVisible = FALSE; mVisInfo.mDistance = 512.0f; mVisInfo.mRenderLevel = 0; mVisInfo.mRenderStride = mSurfacep->getGridsPerPatchEdge(); } void LLSurfacePatch::connectNeighbor(LLSurfacePatch *neighbor_patchp, const U32 direction) { llassert(neighbor_patchp); mNormalsInvalid[direction] = TRUE; neighbor_patchp->mNormalsInvalid[gDirOpposite[direction]] = TRUE; setNeighborPatch(direction, neighbor_patchp); neighbor_patchp->setNeighborPatch(gDirOpposite[direction], this); if (EAST == direction) { mConnectedEdge |= EAST_EDGE; neighbor_patchp->mConnectedEdge |= WEST_EDGE; } else if (NORTH == direction) { mConnectedEdge |= NORTH_EDGE; neighbor_patchp->mConnectedEdge |= SOUTH_EDGE; } else if (WEST == direction) { mConnectedEdge |= WEST_EDGE; neighbor_patchp->mConnectedEdge |= EAST_EDGE; } else if (SOUTH == direction) { mConnectedEdge |= SOUTH_EDGE; neighbor_patchp->mConnectedEdge |= NORTH_EDGE; } } void LLSurfacePatch::updateVisibility() { if (mVObjp.isNull()) { return; } const F32 DEFAULT_DELTA_ANGLE = (0.15f); U32 old_render_stride, max_render_stride; U32 new_render_level; F32 stride_per_distance = DEFAULT_DELTA_ANGLE / mSurfacep->getMetersPerGrid(); U32 grids_per_patch_edge = mSurfacep->getGridsPerPatchEdge(); LLVector4a center; center.load3( (mCenterRegion + mSurfacep->getOriginAgent()).mV); LLVector4a radius; radius.splat(mRadius); // sphere in frustum on global coordinates if (LLViewerCamera::getInstance()->AABBInFrustumNoFarClip(center, radius)) { // We now need to calculate the render stride based on patchp's distance // from LLCamera render_stride is governed by a relation something like this... // // delta_angle * patch.distance // render_stride <= ---------------------------------------- // mMetersPerGrid // // where 'delta_angle' is the desired solid angle of the average polgon on a patch. // // Any render_stride smaller than the RHS would be 'satisfactory'. Smaller // strides give more resolution, but efficiency suggests that we use the largest // of the render_strides that obey the relation. Flexibility is achieved by // modulating 'delta_angle' until we have an acceptable number of triangles. old_render_stride = mVisInfo.mRenderStride; // Calculate the render_stride using information in agent max_render_stride = lltrunc(mVisInfo.mDistance * stride_per_distance); max_render_stride = llmin(max_render_stride , 2*grids_per_patch_edge); // We only use render_strides that are powers of two, so we use look-up tables to figure out // the render_level and corresponding render_stride new_render_level = mVisInfo.mRenderLevel = mSurfacep->getRenderLevel(max_render_stride); mVisInfo.mRenderStride = mSurfacep->getRenderStride(new_render_level); if ((mVisInfo.mRenderStride != old_render_stride)) // The reason we check !mbIsVisible is because non-visible patches normals // are not updated when their data is changed. When this changes we can get // rid of mbIsVisible altogether. { if (mVObjp) { mVObjp->dirtyGeom(); if (getNeighborPatch(WEST)) { getNeighborPatch(WEST)->mVObjp->dirtyGeom(); } if (getNeighborPatch(SOUTH)) { getNeighborPatch(SOUTH)->mVObjp->dirtyGeom(); } } } mVisInfo.mbIsVisible = TRUE; } else { mVisInfo.mbIsVisible = FALSE; } } const LLVector3d &LLSurfacePatch::getOriginGlobal() const { return mOriginGlobal; } LLVector3 LLSurfacePatch::getOriginAgent() const { return gAgent.getPosAgentFromGlobal(mOriginGlobal); } BOOL LLSurfacePatch::getVisible() const { return mVisInfo.mbIsVisible; } U32 LLSurfacePatch::getRenderStride() const { return mVisInfo.mRenderStride; } S32 LLSurfacePatch::getRenderLevel() const { return mVisInfo.mRenderLevel; } void LLSurfacePatch::setHasReceivedData() { mHasReceivedData = TRUE; } BOOL LLSurfacePatch::getHasReceivedData() const { return mHasReceivedData; } const LLVector3 &LLSurfacePatch::getCenterRegion() const { return mCenterRegion; } void LLSurfacePatch::updateCompositionStats() { LLViewerLayer *vlp = mSurfacep->getRegion()->getComposition(); F32 x, y, width, height, mpg, min, mean, max; LLVector3 origin = getOriginAgent() - mSurfacep->getOriginAgent(); mpg = mSurfacep->getMetersPerGrid(); x = origin.mV[VX]; y = origin.mV[VY]; width = mpg*(mSurfacep->getGridsPerPatchEdge()+1); height = mpg*(mSurfacep->getGridsPerPatchEdge()+1); mean = 0.f; min = vlp->getValueScaled(x, y); max= min; U32 count = 0; F32 i, j; for (j = 0; j < height; j += mpg) { for (i = 0; i < width; i += mpg) { F32 comp = vlp->getValueScaled(x + i, y + j); mean += comp; min = llmin(min, comp); max = llmax(max, comp); count++; } } mean /= count; mMinComposition = min; mMeanComposition = mean; mMaxComposition = max; } F32 LLSurfacePatch::getMeanComposition() const { return mMeanComposition; } F32 LLSurfacePatch::getMinComposition() const { return mMinComposition; } F32 LLSurfacePatch::getMaxComposition() const { return mMaxComposition; } void LLSurfacePatch::setNeighborPatch(const U32 direction, LLSurfacePatch *neighborp) { mNeighborPatches[direction] = neighborp; mNormalsInvalid[direction] = TRUE; if (direction < 4) { mNormalsInvalid[gDirAdjacent[direction][0]] = TRUE; mNormalsInvalid[gDirAdjacent[direction][1]] = TRUE; } } LLSurfacePatch *LLSurfacePatch::getNeighborPatch(const U32 direction) const { return mNeighborPatches[direction]; } void LLSurfacePatch::clearVObj() { mVObjp = NULL; }