1 files changed, 68 insertions, 23 deletions

diff --git a/indra/newview/llface.cpp b/indra/newview/llface.cpp
index 4822c303bf..c40edb6511 100644
--- a/indra/newview/llface.cpp
+++ b/indra/newview/llface.cpp
@@ -182,6 +182,7 @@ void LLFace::init(LLDrawable* drawablep, LLViewerObject* objp)
 
 	mAtlasInfop = NULL ;
 	mUsingAtlas  = FALSE ;
+	mHasMedia = FALSE ;
 }
 
 static LLFastTimer::DeclareTimer FTM_DESTROY_FACE("Destroy Face");
@@ -322,7 +323,8 @@ void LLFace::switchTexture(LLViewerTexture* new_texture)
 
 	if(!new_texture)
 	{
-		llerrs << "Can not switch to a null texture." << llendl ;
+		llerrs << "Can not switch to a null texture." << llendl;
+		return;
 	}
 	new_texture->addTextureStats(mTexture->getMaxVirtualSize()) ;
 
@@ -1061,17 +1063,20 @@ BOOL LLFace::getGeometryVolume(const LLVolume& volume,
 
 	if (rebuild_color)
 	{
-		GLfloat alpha[4] =
-		{
-			0.00f,
-			0.25f,
-			0.5f,
-			0.75f
-		};
-
-		if (getPoolType() != LLDrawPool::POOL_ALPHA && (LLPipeline::sRenderDeferred || (LLPipeline::sRenderBump && tep->getShiny())))
+		if (tep)
 		{
-			color.mV[3] = U8 (alpha[tep->getShiny()] * 255);
+			GLfloat alpha[4] =
+			{
+				0.00f,
+				0.25f,
+				0.5f,
+				0.75f
+			};
+			
+			if (getPoolType() != LLDrawPool::POOL_ALPHA && (LLPipeline::sRenderDeferred || (LLPipeline::sRenderBump && tep->getShiny())))
+			{
+				color.mV[3] = U8 (alpha[tep->getShiny()] * 255);
+			}
 		}
 	}
 
@@ -1354,17 +1359,33 @@ BOOL LLFace::getGeometryVolume(const LLVolume& volume,
 	return TRUE;
 }
 
+//check if the face has a media
+BOOL LLFace::hasMedia() const 
+{
+	if(mHasMedia)
+	{
+		return TRUE ;
+	}
+	if(mTexture.notNull()) 
+	{
+		return mTexture->hasParcelMedia() ;  //if has a parcel media
+	}
+
+	return FALSE ; //no media.
+}
+
 const F32 LEAST_IMPORTANCE = 0.05f ;
 const F32 LEAST_IMPORTANCE_FOR_LARGE_IMAGE = 0.3f ;
 
 F32 LLFace::getTextureVirtualSize()
 {
 	F32 radius;
-	F32 cos_angle_to_view_dir;
-	mPixelArea = calcPixelArea(cos_angle_to_view_dir, radius);
+	F32 cos_angle_to_view_dir;	
+	BOOL in_frustum = calcPixelArea(cos_angle_to_view_dir, radius);
 
-	if (mPixelArea <= 0)
+	if (mPixelArea < 0.0001f || !in_frustum)
 	{
+		setVirtualSize(0.f) ;
 		return 0.f;
 	}
 
@@ -1401,23 +1422,48 @@ F32 LLFace::getTextureVirtualSize()
 		}
 	}
 
+	setVirtualSize(face_area) ;
+
 	return face_area;
 }
 
-F32 LLFace::calcPixelArea(F32& cos_angle_to_view_dir, F32& radius)
+BOOL LLFace::calcPixelArea(F32& cos_angle_to_view_dir, F32& radius)
 {
 	//get area of circle around face
 	LLVector3 center = getPositionAgent();
-	LLVector3 size = (mExtents[1] - mExtents[0]) * 0.5f;
-	
+	LLVector3 size = (mExtents[1] - mExtents[0]) * 0.5f;	
 	LLViewerCamera* camera = LLViewerCamera::getInstance();
+
+	F32 size_squared = size.lengthSquared() ;
 	LLVector3 lookAt = center - camera->getOrigin();
-	F32 dist = lookAt.normVec() ;
+	F32 dist = lookAt.normVec() ;	
 
 	//get area of circle around node
-	F32 app_angle = atanf(size.length()/dist);
+	F32 app_angle = atanf(fsqrtf(size_squared) / dist);
 	radius = app_angle*LLDrawable::sCurPixelAngle;
-	F32 face_area = radius*radius * 3.14159f;
+	mPixelArea = radius*radius * 3.14159f;
+	cos_angle_to_view_dir = lookAt * camera->getXAxis() ;
+
+	//if has media, check if the face is out of the view frustum.	
+	if(hasMedia())
+	{
+		if(!camera->AABBInFrustum(center, size)) 
+		{
+			mImportanceToCamera = 0.f ;
+			return false ;
+		}
+		if(cos_angle_to_view_dir > camera->getCosHalfFov()) //the center is within the view frustum
+		{
+			cos_angle_to_view_dir = 1.0f ;
+		}
+		else
+		{		
+			if(dist * dist * (lookAt - camera->getXAxis()).lengthSquared() < size_squared)
+			{
+				cos_angle_to_view_dir = 1.0f ;
+			}
+		}
+	}
 
 	if(dist < mBoundingSphereRadius) //camera is very close
 	{
@@ -1425,12 +1471,11 @@ F32 LLFace::calcPixelArea(F32& cos_angle_to_view_dir, F32& radius)
 		mImportanceToCamera = 1.0f ;
 	}
 	else
-	{
-		cos_angle_to_view_dir = lookAt * camera->getXAxis() ;	
+	{		
 		mImportanceToCamera = LLFace::calcImportanceToCamera(cos_angle_to_view_dir, dist) ;
 	}
 
-	return face_area ;
+	return true ;
 }
 
 //the projection of the face partially overlaps with the screen