#1069 Added ellipsis tesselator

ApplicationCode/ReservoirDataModel/CMakeLists_files.cmake

@@ -50,6 +50,7 @@ ${CEE_CURRENT_LIST_DIR}RigCurveDataTools.h
 ${CEE_CURRENT_LIST_DIR}RigSummaryCaseData.h
 ${CEE_CURRENT_LIST_DIR}RigLasFileExporter.h
 ${CEE_CURRENT_LIST_DIR}RigFracture.h
+${CEE_CURRENT_LIST_DIR}RigTesselatorTools.h
 )
 
 set (SOURCE_GROUP_SOURCE_FILES
@@ -93,6 +94,7 @@ ${CEE_CURRENT_LIST_DIR}RigCurveDataTools.cpp
 ${CEE_CURRENT_LIST_DIR}RigSummaryCaseData.cpp
 ${CEE_CURRENT_LIST_DIR}RigLasFileExporter.cpp
 ${CEE_CURRENT_LIST_DIR}RigFracture.cpp
+${CEE_CURRENT_LIST_DIR}RigTesselatorTools.cpp
 )
 
 list(APPEND CODE_HEADER_FILES

ApplicationCode/ReservoirDataModel/RigTesselatorTools.cpp

@@ -0,0 +1,92 @@
+/////////////////////////////////////////////////////////////////////////////////
+//
+//  Copyright (C) 2017     Statoil 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.
+//
+/////////////////////////////////////////////////////////////////////////////////
+
+#include "RigTesselatorTools.h"
+
+#include "cvfMath.h"
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+RigEllipsisTesselator::RigEllipsisTesselator(size_t numSlices)
+{
+    computeCirclePoints(numSlices);
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+void RigEllipsisTesselator::tesselateEllipsis(float a, float b, std::vector<cvf::uint>* polygonIndices, std::vector<cvf::Vec3f>* nodeCoords)
+{
+    // See http://mathworld.wolfram.com/Ellipse.html
+
+    for (auto v : m_circlePoints)
+    {
+        v.x() = v.x() * a;
+        v.y() = v.y() * b;
+
+        nodeCoords->push_back(v);
+    }
+
+    *polygonIndices = m_circleConnectivities;
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+void RigEllipsisTesselator::computeCirclePoints(size_t numSlices)
+{
+    // Based on GeometryUtils::generatePointsOnCircle 
+
+    double da = 2 * cvf::PI_D / numSlices;
+     
+    cvf::Vec3f point = cvf::Vec3f::ZERO;
+
+    // Center of circle
+    m_circlePoints.push_back(point);
+
+    for (size_t i = 0; i < numSlices; i++) 
+    {
+        // Precompute this one (A = i*da;)
+        double sinA = cvf::Math::sin(i*da);
+        double cosA = cvf::Math::cos(i*da);
+
+        point.x() = static_cast<float>(-sinA);
+        point.y() = static_cast<float>( cosA);
+
+        m_circlePoints.push_back(point);
+    }
+
+    for (cvf::uint i = 0; i < static_cast<cvf::uint>(numSlices); i++)
+    {
+        // Center
+        m_circleConnectivities.push_back(0);
+
+        m_circleConnectivities.push_back(i + 1);
+
+        if (i == (numSlices - 1))
+        {
+            // Connect the last slice to the first slice
+            m_circleConnectivities.push_back(1);
+        }
+        else
+        {
+            m_circleConnectivities.push_back(i + 2);
+        }
+    }
+}

ApplicationCode/ReservoirDataModel/RigTesselatorTools.h

@@ -0,0 +1,43 @@
+/////////////////////////////////////////////////////////////////////////////////
+//
+//  Copyright (C) 2017     Statoil 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 "cvfBase.h"
+#include "cvfVector3.h"
+
+#include <vector>
+
+
+//==================================================================================================
+/// 
+//==================================================================================================
+class RigEllipsisTesselator
+{
+public:
+    RigEllipsisTesselator(size_t numSlices);
+
+    void tesselateEllipsis(float a, float b, std::vector<cvf::uint>* polygonIndices, std::vector<cvf::Vec3f>* nodeCoords);
+
+private:
+    void computeCirclePoints(size_t numSlices);
+
+private:
+    std::vector<cvf::Vec3f> m_circlePoints;
+    std::vector<cvf::uint>  m_circleConnectivities;
+};