unify(shroud): Merge W3DShroud code from Zero Hour and implicitly fix black terrain for one frame on far camera jumps

Generals/Code/GameEngineDevice/Source/W3DDevice/GameClient/W3DShroud.cpp

@@ -120,19 +120,24 @@ void W3DShroud::init(WorldHeightMap *pMap, Real worldCellSizeX, Real worldCellSi
 	//Precompute a bounding box for entire shroud layer
 	if (pMap)
 	{
-		m_numCellsX = REAL_TO_INT_CEIL((Real)(pMap->getXExtent() - 1 - pMap->getBorderSize()*2)*MAP_XY_FACTOR/m_cellWidth);
-		m_numCellsY = REAL_TO_INT_CEIL((Real)(pMap->getYExtent() - 1 - pMap->getBorderSize()*2)*MAP_XY_FACTOR/m_cellHeight);
+		m_numCellsX = REAL_TO_INT_CEIL((Real)(pMap->getXExtent() - 1 - pMap->getBorderSizeInline()*2)*MAP_XY_FACTOR/m_cellWidth);
+		m_numCellsY = REAL_TO_INT_CEIL((Real)(pMap->getYExtent() - 1 - pMap->getBorderSizeInline()*2)*MAP_XY_FACTOR/m_cellHeight);
 
 		//Maximum visible cells will depend on maximum drawable terrain size plus 1 for partial cells (since
 		//shroud cells are larger than terrain cells).
 		dstTextureWidth=m_numMaxVisibleCellsX=REAL_TO_INT_FLOOR((Real)(pMap->getDrawWidth()-1)*MAP_XY_FACTOR/m_cellWidth)+1;
 		dstTextureHeight=m_numMaxVisibleCellsY=REAL_TO_INT_FLOOR((Real)(pMap->getDrawHeight()-1)*MAP_XY_FACTOR/m_cellHeight)+1;
+
+		dstTextureWidth = m_numCellsX;
+		dstTextureHeight = m_numCellsY;
+
 		dstTextureWidth += 2;	//enlarge by 2 pixels so we can have a border color all the way around.
 		unsigned int depth = 1;
 		dstTextureHeight += 2;	//enlarge by 2 pixels so we can have border color all the way around.
 		TextureLoader::Validate_Texture_Size((unsigned int &)dstTextureWidth,(unsigned int &)dstTextureHeight, depth);
 	}
 
+
 	UnsignedInt srcWidth,srcHeight;
 
 	srcWidth=m_numCellsX;
@@ -225,7 +230,7 @@ void W3DShroud::ReleaseResources()
 Bool W3DShroud::ReAcquireResources()
 {
 		if (!m_dstTextureWidth)
-			return TRUE;	//nothing to reaquire since shroud was never initialized with valid data
+			return TRUE;	//nothing to reacquire since shroud was never initialized with valid data
 
 		DEBUG_ASSERTCRASH( m_pDstTexture == nullptr, ("ReAcquire of existing shroud texture"));
 
@@ -613,15 +618,24 @@ void W3DShroud::render(CameraClass *cam)
 
 
 	WorldHeightMap *hm=TheTerrainRenderObject->getMap();
-	Int visStartX=REAL_TO_INT_FLOOR((Real)(hm->getDrawOrgX()-hm->getBorderSize())*MAP_XY_FACTOR/m_cellWidth);	//start of rendered heightmap rectangle
+	Int visStartX=REAL_TO_INT_FLOOR((Real)(hm->getDrawOrgX()-hm->getBorderSizeInline())*MAP_XY_FACTOR/m_cellWidth);	//start of rendered heightmap rectangle
 	if (visStartX < 0)
 		visStartX = 0;	//no shroud is applied in border area so it always starts at > 0
-	Int visStartY=REAL_TO_INT_FLOOR((Real)(hm->getDrawOrgY()-hm->getBorderSize())*MAP_XY_FACTOR/m_cellHeight);
+	Int visStartY=REAL_TO_INT_FLOOR((Real)(hm->getDrawOrgY()-hm->getBorderSizeInline())*MAP_XY_FACTOR/m_cellHeight);
 	if (visStartY < 0)
 		visStartY = 0;	//no shroud is applied in border area so it always starts at > 0
+
+	// Do it all [3/11/2003]
+	visStartX = 0;
+	visStartY = 0;
+
 	Int visEndX=visStartX+REAL_TO_INT_FLOOR((Real)(hm->getDrawWidth()-1)*MAP_XY_FACTOR/m_cellWidth)+1;	//size of rendered heightmap rectangle
 	Int visEndY=visStartY+REAL_TO_INT_FLOOR((Real)(hm->getDrawHeight()-1)*MAP_XY_FACTOR/m_cellHeight)+1;
 
+	// Do it all [3/11/2003]
+	visEndX = m_numCellsX;
+	visEndY = m_numCellsY;
+
 	if (visEndX > m_numCellsX)
 	{
 		visStartX -= visEndX - m_numCellsX;	//shift visible rectangle to fall within terrain bounds