Streamline improvement (#7435)

* Use updated generator. Switch to using priority list for seeds. Fix phase reporting and sign issues. Fix step size when growing.
* Reduce memory footprint by simplifying viz. code and filter out unused tracers early
* Remove unused viz. code.

ApplicationLibCode/ProjectDataModel/Streamlines/RimStreamlineGenerator.h

@@ -0,0 +1,56 @@
+/////////////////////////////////////////////////////////////////////////////////
+//
+//  Copyright (C) 2021     Equinor ASA
+//
+//  ResInsight is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  ResInsight is distributed in the hope that it will be useful, but WITHOUT ANY
+//  WARRANTY; without even the implied warranty of MERCHANTABILITY or
+//  FITNESS FOR A PARTICULAR PURPOSE.
+//
+//  See the GNU General Public License at <http://www.gnu.org/licenses/gpl.html>
+//  for more details.
+//
+/////////////////////////////////////////////////////////////////////////////////
+
+#pragma once
+
+#include "RiaDefines.h"
+
+#include "RimStreamlineGeneratorBase.h"
+
+#include <QString>
+
+#include <list>
+#include <queue>
+#include <set>
+
+class RigCell;
+class RimStreamline;
+class StreamlineSeedPoint;
+
+class RimStreamlineGenerator : public RimStreamlineGeneratorBase
+{
+public:
+    RimStreamlineGenerator( std::set<size_t>& wellCells );
+    ~RimStreamlineGenerator();
+
+    void generateTracer( RigCell cell, double direction, QString simWellName, std::list<RimStreamline*>& outStreamlines ) override;
+
+protected:
+    void growStreamline( RimStreamline*                     streamline,
+                         size_t                             cellIdx,
+                         cvf::StructGridInterface::FaceType faceIdx,
+                         double                             direction );
+
+    bool growStreamlineFromTo( RimStreamline*        streamline,
+                               cvf::Vec3d            startPos,
+                               cvf::Vec3d            endpos,
+                               double                rate,
+                               RiaDefines::PhaseType dominantPhase );
+
+    std::priority_queue<StreamlineSeedPoint> m_seeds;
+};