$alias = $c->getAlias();
$c->innerJoin('modTemplateVarResource',  'tv_shape', "tv_shape.contentid = {$this->classKey}.id AND tv_shape.tmplvarid = $tv_shape_id AND tv_shape.value='rectangle'");
$c->innerJoin('modTemplateVarResource',  'tv_processing_edge', "tv_processing_edge.contentid = {$this->classKey}.id AND tv_processing_edge.tmplvarid = $tv_processing_edge_id AND tv_processing_edge.value='10'");