void LLDrawable::updateDistance(LLCamera& camera, bool force_update)
{
if (LLViewerCamera::sCurCameraID != LLViewerCamera::CAMERA_WORLD)
{
llwarns << "Attempted to update distance for non-world camera." << llendl;
return;
}
//switch LOD with the spatial group to avoid artifacts
//LLSpatialGroup* sg = getSpatialGroup();
LLVector3 pos;
//if (!sg || sg->changeLOD())
{
LLVOVolume* volume = getVOVolume();
if (volume)
{
if (getSpatialGroup())
{
pos.set(getPositionGroup().getF32ptr());
}
else
{
pos = getPositionAgent();
}
if (isState(LLDrawable::HAS_ALPHA))
{
for (S32 i = 0; i < getNumFaces(); i++)
{
LLFace* facep = getFace(i);
if (force_update || facep->getPoolType() == LLDrawPool::POOL_ALPHA)
{
LLVector4a box;
box.setSub(facep->mExtents[1], facep->mExtents[0]);
box.mul(0.25f);
LLVector3 v = (facep->mCenterLocal-camera.getOrigin());
const LLVector3& at = camera.getAtAxis();
for (U32 j = 0; j < 3; j++)
{
v.mV[j] -= box[j] * at.mV[j];
}
facep->mDistance = v * camera.getAtAxis();
}
}
}
}
else
{
pos = LLVector3(getPositionGroup().getF32ptr());
}
pos -= camera.getOrigin();
mDistanceWRTCamera = llround(pos.magVec(), 0.01f);
mVObjp->updateLOD();
}
}
void LLVOCacheEntry::calcSceneContribution(const LLVector4a& camera_origin, bool needs_update, U32 last_update, F32 max_dist)
{
if(!needs_update && getVisible() >= last_update)
{
return; //no need to update
}
LLVector4a lookAt;
lookAt.setSub(getPositionGroup(), camera_origin);
F32 distance = lookAt.getLength3().getF32();
distance -= sNearRadius;
if(distance <= 0.f)
{
//nearby objects, set a large number
const F32 LARGE_SCENE_CONTRIBUTION = 1000.f; //a large number to force to load the object.
mSceneContrib = LARGE_SCENE_CONTRIBUTION;
}
else
{
F32 rad = getBinRadius();
max_dist += rad;
if(distance + sNearRadius < max_dist)
{
mSceneContrib = (rad * rad) / distance;
}
else
{
mSceneContrib = 0.f; //out of draw distance, not to load
}
}
setVisible();
}
void LLDrawable::updateDistance(LLCamera& camera, bool force_update)
{
//switch LOD with the spatial group to avoid artifacts
//LLSpatialGroup* sg = getSpatialGroup();
LLVector3 pos;
//if (!sg || sg->changeLOD())
{
LLVOVolume* volume = getVOVolume();
if (volume)
{
volume->updateRelativeXform();
pos = volume->getRelativeXform().getTranslation();
if (isStatic())
{
pos += volume->getRegion()->getOriginAgent();
}
if (isState(LLDrawable::HAS_ALPHA))
{
for (S32 i = 0; i < getNumFaces(); i++)
{
LLFace* facep = getFace(i);
if (facep->getPoolType() == LLDrawPool::POOL_ALPHA)
{
LLVector3 box = (facep->mExtents[1] - facep->mExtents[0]) * 0.25f;
LLVector3 v = (facep->mCenterLocal-camera.getOrigin());
const LLVector3& at = camera.getAtAxis();
for (U32 j = 0; j < 3; j++)
{
v.mV[j] -= box.mV[j] * at.mV[j];
}
facep->mDistance = v * camera.getAtAxis();
}
}
}
}
else
{
pos = LLVector3(getPositionGroup());
}
pos -= camera.getOrigin();
mDistanceWRTCamera = llround(pos.magVec(), 0.01f);
mVObjp->updateLOD();
}
}
bool LLVOCacheEntry::isAnyVisible(const LLVector4a& camera_origin, const LLVector4a& local_camera_origin, F32 dist_threshold)
{
LLOcclusionCullingGroup* group = (LLOcclusionCullingGroup*)getGroup();
if(!group)
{
return false;
}
//any visible
bool vis = group->isAnyRecentlyVisible();
//not ready to remove
if(!vis)
{
S32 cur_vis = llmax(group->getAnyVisible(), (S32)getVisible());
vis = (cur_vis + sMinFrameRange > LLViewerOctreeEntryData::getCurrentFrame());
}
//within the back sphere
if(!vis && !mParentID && !group->isOcclusionState(LLOcclusionCullingGroup::OCCLUDED))
{
LLVector4a lookAt;
if(mBSphereRadius > 0.f)
{
lookAt.setSub(mBSphereCenter, local_camera_origin);
dist_threshold += mBSphereRadius;
}
else
{
lookAt.setSub(getPositionGroup(), camera_origin);
dist_threshold += getBinRadius();
}
vis = (lookAt.dot3(lookAt).getF32() < dist_threshold * dist_threshold);
}
return vis;
}
//make the parent bounding box to include this child
void LLVOCacheEntry::updateParentBoundingInfo(const LLVOCacheEntry* child)
{
const LLVector4a* child_exts = child->getSpatialExtents();
LLVector4a newMin, newMax;
newMin = child_exts[0];
newMax = child_exts[1];
//move to regional space.
{
const LLVector4a& parent_pos = getPositionGroup();
newMin.add(parent_pos);
newMax.add(parent_pos);
}
//update parent's bbox(min, max)
const LLVector4a* parent_exts = getSpatialExtents();
update_min_max(newMin, newMax, parent_exts[0]);
update_min_max(newMin, newMax, parent_exts[1]);
for(S32 i = 0; i < 4; i++)
{
llclamp(newMin[i], 0.f, 256.f);
llclamp(newMax[i], 0.f, 256.f);
}
setSpatialExtents(newMin, newMax);
//update parent's bbox center
LLVector4a center;
center.setAdd(newMin, newMax);
center.mul(0.5f);
setPositionGroup(center);
//update parent's bbox size vector
LLVector4a size;
size.setSub(newMax, newMin);
size.mul(0.5f);
setBinRadius(llmin(size.getLength3().getF32() * 4.f, 256.f));
}
void LLVOCacheEntry::saveBoundingSphere()
{
mBSphereCenter = getPositionGroup();
mBSphereRadius = getBinRadius();
}