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();
}
BOOL LLFace::calcPixelArea(F32& cos_angle_to_view_dir, F32& radius)
{
//VECTORIZE THIS
//get area of circle around face
LLVector4a center;
center.load3(getPositionAgent().mV);
LLVector4a size;
size.setSub(mExtents[1], mExtents[0]);
size.mul(0.5f);
LLViewerCamera* camera = LLViewerCamera::getInstance();
F32 size_squared = size.dot3(size).getF32();
LLVector4a lookAt;
LLVector4a t;
t.load3(camera->getOrigin().mV);
lookAt.setSub(center, t);
F32 dist = lookAt.getLength3().getF32();
dist = llmax(dist-size.getLength3().getF32(), 0.f);
lookAt.normalize3fast() ;
//get area of circle around node
F32 app_angle = atanf((F32) sqrt(size_squared) / dist);
radius = app_angle*LLDrawable::sCurPixelAngle;
mPixelArea = radius*radius * 3.14159f;
LLVector4a x_axis;
x_axis.load3(camera->getXAxis().mV);
cos_angle_to_view_dir = lookAt.dot3(x_axis).getF32();
if(dist < mBoundingSphereRadius) //camera is very close
{
cos_angle_to_view_dir = 1.0f;
mImportanceToCamera = 1.0f;
}
else
{
mImportanceToCamera = LLFace::calcImportanceToCamera(cos_angle_to_view_dir, dist);
}
return true;
}
void LLVOCacheEntry::setBoundingInfo(const LLVector3& pos, const LLVector3& scale)
{
LLVector4a center, newMin, newMax;
center.load3(pos.mV);
LLVector4a size;
size.load3(scale.mV);
newMin.setSub(center, size);
newMax.setAdd(center, size);
setPositionGroup(center);
setSpatialExtents(newMin, newMax);
if(getNumOfChildren() > 0) //has children
{
updateParentBoundingInfo();
}
else
{
setBinRadius(llmin(size.getLength3().getF32() * 4.f, 256.f));
}
}
bool LLViewerOctreeCull::checkProjectionArea(const LLVector4a& center, const LLVector4a& size, const LLVector3& shift, F32 pixel_threshold, F32 near_radius)
{
LLVector3 local_orig = mCamera->getOrigin() - shift;
LLVector4a origin;
origin.load3(local_orig.mV);
LLVector4a lookAt;
lookAt.setSub(center, origin);
F32 distance = lookAt.getLength3().getF32();
if(distance <= near_radius)
{
return true; //always load close-by objects
}
// treat object as if it were near_radius meters closer than it actually was.
// this allows us to get some temporal coherence on visibility...objects that can be reached quickly will tend to be visible
distance -= near_radius;
F32 squared_rad = size.dot3(size).getF32();
return squared_rad / distance > pixel_threshold;
}
//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 LLSpatialBridge::updateSpatialExtents()
{
LLSpatialGroup* root = (LLSpatialGroup*) mOctree->getListener(0);
{
LLFastTimer ftm(FTM_CULL_REBOUND);
root->rebound();
}
LLVector4a offset;
LLVector4a size = root->mBounds[1];
//VECTORIZE THIS
LLMatrix4a mat;
mat.loadu(mDrawable->getXform()->getWorldMatrix());
LLVector4a t;
t.splat(0.f);
LLVector4a center;
mat.affineTransform(t, center);
mat.rotate(root->mBounds[0], offset);
center.add(offset);
LLVector4a v[4];
//get 4 corners of bounding box
mat.rotate(size,v[0]);
LLVector4a scale;
scale.set(-1.f, -1.f, 1.f);
scale.mul(size);
mat.rotate(scale, v[1]);
scale.set(1.f, -1.f, -1.f);
scale.mul(size);
mat.rotate(scale, v[2]);
scale.set(-1.f, 1.f, -1.f);
scale.mul(size);
mat.rotate(scale, v[3]);
LLVector4a& newMin = mExtents[0];
LLVector4a& newMax = mExtents[1];
newMin = newMax = center;
for (U32 i = 0; i < 4; i++)
{
LLVector4a delta;
delta.setAbs(v[i]);
LLVector4a min;
min.setSub(center, delta);
LLVector4a max;
max.setAdd(center, delta);
newMin.setMin(newMin, min);
newMax.setMax(newMax, max);
}
LLVector4a diagonal;
diagonal.setSub(newMax, newMin);
mRadius = diagonal.getLength3().getF32() * 0.5f;
mPositionGroup.setAdd(newMin,newMax);
mPositionGroup.mul(0.5f);
updateBinRadius();
}
BOOL LLFace::genVolumeBBoxes(const LLVolume &volume, S32 f,
const LLMatrix4& mat_vert_in, const LLMatrix3& mat_normal_in, BOOL global_volume)
{
LLMemType mt1(LLMemType::MTYPE_DRAWABLE);
//get bounding box
if (mDrawablep->isState(LLDrawable::REBUILD_VOLUME | LLDrawable::REBUILD_POSITION
#if MESH_ENABLED
| LLDrawable::REBUILD_RIGGED
#endif //MESH_ENABLED
))
{
//VECTORIZE THIS
LLMatrix4a mat_vert;
mat_vert.loadu(mat_vert_in);
LLMatrix4a mat_normal;
mat_normal.loadu(mat_normal_in);
//if (mDrawablep->isState(LLDrawable::REBUILD_VOLUME))
//{ //vertex buffer no longer valid
// mVertexBuffer = NULL;
// mLastVertexBuffer = NULL;
//}
//VECTORIZE THIS
LLVector4a min,max;
if (f >= volume.getNumVolumeFaces())
{
llwarns << "Generating bounding box for invalid face index!" << llendl;
f = 0;
}
const LLVolumeFace &face = volume.getVolumeFace(f);
min = face.mExtents[0];
max = face.mExtents[1];
llassert(less_than_max_mag(min));
llassert(less_than_max_mag(max));
//min, max are in volume space, convert to drawable render space
LLVector4a center;
LLVector4a t;
t.setAdd(min, max);
t.mul(0.5f);
mat_vert.affineTransform(t, center);
LLVector4a size;
size.setSub(max, min);
size.mul(0.5f);
llassert(less_than_max_mag(min));
llassert(less_than_max_mag(max));
if (!global_volume)
{
//VECTORIZE THIS
LLVector4a scale;
scale.load3(mDrawablep->getVObj()->getScale().mV);
size.mul(scale);
}
mat_normal.mMatrix[0].normalize3fast();
mat_normal.mMatrix[1].normalize3fast();
mat_normal.mMatrix[2].normalize3fast();
LLVector4a v[4];
//get 4 corners of bounding box
mat_normal.rotate(size,v[0]);
//VECTORIZE THIS
LLVector4a scale;
scale.set(-1.f, -1.f, 1.f);
scale.mul(size);
mat_normal.rotate(scale, v[1]);
scale.set(1.f, -1.f, -1.f);
scale.mul(size);
mat_normal.rotate(scale, v[2]);
scale.set(-1.f, 1.f, -1.f);
scale.mul(size);
mat_normal.rotate(scale, v[3]);
LLVector4a& newMin = mExtents[0];
LLVector4a& newMax = mExtents[1];
newMin = newMax = center;
llassert(less_than_max_mag(center));
for (U32 i = 0; i < 4; i++)
{
LLVector4a delta;
delta.setAbs(v[i]);
LLVector4a min;
min.setSub(center, delta);
LLVector4a max;
max.setAdd(center, delta);
newMin.setMin(newMin,min);
newMax.setMax(newMax,max);
llassert(less_than_max_mag(newMin));
llassert(less_than_max_mag(newMax));
}
if (!mDrawablep->isActive())
{
LLVector4a offset;
offset.load3(mDrawablep->getRegion()->getOriginAgent().mV);
newMin.add(offset);
newMax.add(offset);
llassert(less_than_max_mag(newMin));
llassert(less_than_max_mag(newMax));
}
t.setAdd(newMin, newMax);
t.mul(0.5f);
llassert(less_than_max_mag(t));
//VECTORIZE THIS
mCenterLocal.set(t.getF32ptr());
llassert(less_than_max_mag(newMin));
llassert(less_than_max_mag(newMax));
t.setSub(newMax,newMin);
mBoundingSphereRadius = t.getLength3().getF32()*0.5f;
updateCenterAgent();
}
return TRUE;
}
