C++ LLVector4a::setMax方法代码示例

//virtual 
bool LLViewerOctreeGroup::boundObjects(BOOL empty, LLVector4a& minOut, LLVector4a& maxOut)
{
	const OctreeNode* node = mOctreeNode;

	if (node->isEmpty())
	{	//don't do anything if there are no objects
		if (empty && mOctreeNode->getParent())
		{	//only root is allowed to be empty
			OCT_ERRS << "Empty leaf found in octree." << LL_ENDL;
		}
		return false;
	}

	LLVector4a& newMin = mObjectExtents[0];
	LLVector4a& newMax = mObjectExtents[1];
	
	if (hasState(OBJECT_DIRTY))
	{ //calculate new bounding box
		clearState(OBJECT_DIRTY);

		//initialize bounding box to first element
		OctreeNode::const_element_iter i = node->getDataBegin();
		LLViewerOctreeEntry* entry = *i;
		const LLVector4a* minMax = entry->getSpatialExtents();

		newMin = minMax[0];
		newMax = minMax[1];

		for (++i; i != node->getDataEnd(); ++i)
		{
			entry = *i;
			minMax = entry->getSpatialExtents();
			
			update_min_max(newMin, newMax, minMax[0]);
			update_min_max(newMin, newMax, minMax[1]);
		}
		
		mObjectBounds[0].setAdd(newMin, newMax);
		mObjectBounds[0].mul(0.5f);
		mObjectBounds[1].setSub(newMax, newMin);
		mObjectBounds[1].mul(0.5f);
	}
	
	if (empty)
	{
		minOut = newMin;
		maxOut = newMax;
	}
	else
	{
		minOut.setMin(minOut, newMin);
		maxOut.setMax(maxOut, newMax);
	}
		
	return TRUE;
}

//.........这里部分代码省略.........
				vect_face.push_back(vo->volumePositionToAgent(vert[i]));	
			}
		}
		vert_it = vect_face.begin();
		vert_end = vect_face.end();
		
		LLMatrix4a mat;
		if (!is_hud) 
		{
			mat.setMul(glh_get_current_projection(),glh_get_current_modelview());
		}
		else {
			LLMatrix4a proj, modelview;
			if (get_hud_matrices(proj, modelview))
			{
				//mat = proj * modelview;
				mat.setMul(proj,modelview);
			}
		}
		LLVector4a min;
		min.splat(1.f);
		LLVector4a max;
		max.splat(-1.f);
		for(; vert_it != vert_end; ++vert_it)
		{
			// project silhouette vertices into screen space
			LLVector4a screen_vert;
			screen_vert.load3(vert_it->mV,1.f);

			mat.perspectiveTransform(screen_vert,screen_vert);

			// add to screenspace bounding box
			min.setMin(screen_vert,min);
			max.setMax(screen_vert,max);
		}
		
		// convert screenspace bbox to pixels (in screen coords)
		LLRect window_rect = gViewerWindow->getWorldViewRectScaled();
		LLCoordGL screen_min;
		screen_min.mX = ll_round((F32)window_rect.mLeft + (F32)window_rect.getWidth() * (min.getF32ptr()[VX] + 1.f) * 0.5f);
		screen_min.mY = ll_round((F32)window_rect.mBottom + (F32)window_rect.getHeight() * (min.getF32ptr()[VY] + 1.f) * 0.5f);
		
		LLCoordGL screen_max;
		screen_max.mX = ll_round((F32)window_rect.mLeft + (F32)window_rect.getWidth() * (max.getF32ptr()[VX] + 1.f) * 0.5f);
		screen_max.mY = ll_round((F32)window_rect.mBottom + (F32)window_rect.getHeight() * (max.getF32ptr()[VY] + 1.f) * 0.5f);
		
		// grow panel so that screenspace bounding box fits inside "media_region" element of panel
		LLRect media_panel_rect;
		// Get the height of the controls (less the volume slider)
		S32 controls_height = mMediaControlsStack->getRect().getHeight() - mVolumeSliderCtrl->getRect().getHeight();
		getParent()->screenRectToLocal(LLRect(screen_min.mX, screen_max.mY, screen_max.mX, screen_min.mY), &media_panel_rect);
		media_panel_rect.mTop += controls_height;
		
		// keep all parts of panel on-screen
		// Area of the top of the world view to avoid putting the controls
		window_rect.mTop -= mTopWorldViewAvoidZone;
		// Don't include "spacing" bookends on left & right of the media controls
		window_rect.mLeft -= mLeftBookend->getRect().getWidth();
		window_rect.mRight += mRightBookend->getRect().getWidth();
		// Don't include the volume slider
		window_rect.mBottom -= mVolumeSliderCtrl->getRect().getHeight();
		media_panel_rect.intersectWith(window_rect);
		
		// clamp to minimum size, keeping rect inside window
		S32 centerX = media_panel_rect.getCenterX();
		S32 centerY = media_panel_rect.getCenterY();

void LLSpatialBridge::updateSpatialExtents()
{
	LLSpatialGroup* root = (LLSpatialGroup*) mOctree->getListener(0);
	
	{
		LLFastTimer ftm(FTM_CULL_REBOUND);
		root->rebound();
	}
	
	const LLVector4a* root_bounds = root->getBounds();
	LLVector4a offset;
	LLVector4a size = root_bounds[1];
		
	const LLMatrix4a& mat = mDrawable->getXform()->getWorldMatrix();

	LLVector4a t;
	t.splat(0.f);

	LLVector4a center;
	mat.affineTransform(t, center);
	
	mat.rotate(root_bounds[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;
	LLVector4a newMax;	
	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);
	}
	setSpatialExtents(newMin, newMax);
	
	LLVector4a diagonal;
	diagonal.setSub(newMax, newMin);
	mRadius = diagonal.getLength3().getF32() * 0.5f;
	
	LLVector4a& pos = getGroupPosition();
	pos.setAdd(newMin,newMax);
	pos.mul(0.5f);
	updateBinRadius();
}