Added RivTernaryScalarMapper and unit test

ApplicationCode/ModelVisualization/RivTernaryScalarMapper.cpp

@@ -0,0 +1,102 @@
+/////////////////////////////////////////////////////////////////////////////////
+//
+//  Copyright (C) Statoil ASA, Ceetron Solutions AS
+// 
+//  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 "RivTernaryScalarMapper.h"
+#include "cvfTextureImage.h"
+
+
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+RivTernaryScalarMapper::RivTernaryScalarMapper(const cvf::Color3f& undefScalarColor, float opacityLevel)
+:	m_undefScalarColor(undefScalarColor),
+	m_opacityLevel(opacityLevel),
+	m_textureSize(128, 256)
+{
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+cvf::Vec2f RivTernaryScalarMapper::mapToTextureCoord(double soil, double swat, bool isTransparent)
+{
+	cvf::Vec2f texCoord;
+
+	return texCoord;
+}
+
+//--------------------------------------------------------------------------------------------------
+/// F * 
+///   * *
+///   *   *  
+///   *     *				Texture in this region is assigned the given opacity level
+///   *       *  
+/// D ***********  E    
+/// C * 
+///   * *
+///   *   *					Texture in this region is opaque
+///   *     *  
+///   *       *  
+/// A ***********  B
+//--------------------------------------------------------------------------------------------------
+bool RivTernaryScalarMapper::updateTexture(cvf::TextureImage* image)
+{
+	CVF_ASSERT(image);
+	image->allocate(m_textureSize.x(), m_textureSize.y());
+
+	// For now fill with white so we can see any errors more easily
+	image->fill(cvf::Color4ub(cvf::Color3::WHITE));
+
+	
+	
+	cvf::uint halfTextureHeight = m_textureSize.y() / 2;
+	
+	// Create texture 
+
+	float xStride = static_cast<float>(1.0f / m_textureSize.x());
+	float yStride = static_cast<float>(1.0f / halfTextureHeight);
+
+	float sgas_red = 0.0f;
+	for (int yPos = 0; yPos < halfTextureHeight; yPos++)
+	{
+		float soil_green = 0.0f;
+		for (int xPos = 0; xPos < m_textureSize.x() - yPos; xPos++)
+		{
+			float swat_blue = 1.0f - sgas_red - soil_green;
+
+			cvf::Color3f floatCol(sgas_red, soil_green, swat_blue);
+
+			cvf::ubyte rByteCol = floatCol.rByte();
+			cvf::ubyte gByteCol = floatCol.gByte();
+			cvf::ubyte bByteCol = floatCol.bByte();
+
+			const cvf::Color4ub clr(rByteCol, gByteCol, bByteCol, 255);
+			image->setPixel(xPos, yPos, clr);
+
+			// Set opacity
+			const cvf::Color4ub clrOpacity(rByteCol, gByteCol, bByteCol, 255 * m_opacityLevel);
+			image->setPixel(xPos, yPos + halfTextureHeight, clrOpacity);
+
+			soil_green += xStride;
+		}
+		sgas_red += yStride;
+	}
+
+	return true;
+}