[ADD] new module that can draw DVR or MIP projections on planes of the

bounding box of a scalar dataset

[ADD] new module that can draw DVR or MIP projections on planes of the
bounding box of a scalar dataset
f9538d6a · Alexander Otte, Markus Jankowski, Michael Hamburger · 183b0fd7 · f9538d6a · f9538d6a · f9538d6a
Commit f9538d6a authored Aug 04, 2014 by Alexander Otte, Markus Jankowski, Michael Hamburger
7 changed files
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -2,6 +2,7 @@ Alois Schloegl
 Andreas Schwarzkopf
 André Reichenbach
 Anne Berres
+Alexander Otte
 Christian Heine
 Christof Pieloth
 Cornelius Müller
@@ -11,8 +12,10 @@ Gerald Sommer
 Jan Forberg
 Marcus Stuber
 Mario Hlawitschka
+Markus Jankowski
 Matthias Berndt
 Matthias Klose
+Michael Hamburger
 Patrick Oesterling
 Robert Frohl
 Robin Ledig

--- a/src/modules/projectionsAsContext/WMProject.cpp
+++ b/src/modules/projectionsAsContext/WMProject.cpp
--- a/src/modules/projectionsAsContext/WMProject.h
+++ b/src/modules/projectionsAsContext/WMProject.h
+//---------------------------------------------------------------------------
+//
+// Project: OpenWalnut ( http://www.openwalnut.org )
+//
+// Copyright 2013 OpenWalnut Community, BSV-Leipzig and CNCF-CBS
+// For more information see http://www.openwalnut.org/copying
+//
+// This file is part of OpenWalnut.
+//
+// OpenWalnut is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// OpenWalnut 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 Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with OpenWalnut. If not, see <http://www.gnu.org/licenses/>.
+//
+//---------------------------------------------------------------------------
+
+#ifndef WMProject_H
+#define WMProject_H
+
+#include <string>
+
+#include "core/kernel/WModule.h"
+
+#include "core/common/WItemSelection.h"
+#include "core/common/WItemSelectionItem.h"
+#include "core/common/WItemSelectionItemTyped.h"
+#include "core/common/WItemSelector.h"
+#include "core/common/WPropertyHelper.h"
+
+#include <osg/Geode>
+
+#include "core/kernel/WModule.h"
+#include "core/kernel/WModuleInputData.h"
+#include "core/kernel/WModuleOutputData.h"
+
+enum PlaneType
+{
+  NONE, MIP, COMPOSITING_F2B, COMPOSITING_B2F
+};
+
+// forward declarations to reduce compile dependencies
+template< class T > class WModuleInputData;
+class WDataSetScalar;
+class WGEManagedGroupNode;
+
+/**
+ * Computes contour lines (aka isolines) for the given data and render them on a 2D plane.
+ * \ingroup modules
+ */
+class WMProject: public WModule
+{
+public:
+    /**
+     * Creates the module for drawing contour lines.
+     */
+    WMProject();
+
+    /**
+     * Destroys this module.
+     */
+    virtual ~WMProject();
+
+    /**
+     * Gives back the name of this module.
+     * \return the module's name.
+     */
+    virtual const std::string getName() const;
+
+    /**
+     * Gives back a description of this module.
+     * \return description to module.
+     */
+    virtual const std::string getDescription() const;
+
+    /**
+     * Due to the prototype design pattern used to build modules, this method returns a new instance of this method. NOTE: it
+     * should never be initialized or modified in some other way. A simple new instance is required.
+     *
+     * \return the prototype used to create every module in OpenWalnut.
+     */
+    virtual boost::shared_ptr< WModule > factory() const;
+
+    /**
+     * Get the icon for this module in XPM format.
+     *
+     * \return The icon.
+     */
+    virtual const char** getXPMIcon() const;
+
+protected:
+    /**
+     * Entry point after loading the module. Runs in separate thread.
+     */
+    virtual void moduleMain();
+
+    /**
+     * Initialize the connectors this module is using.
+     */
+    virtual void connectors();
+
+    /**
+     * Initialize the properties for this module.
+     */
+    virtual void properties();
+
+    /**
+     * Initialize requirements for this module.
+     */
+    virtual void requirements();
+
+    osg::ref_ptr< osg::Geode > m_geode;
+
+private:
+    /**
+     * Input connector for scalar data.
+     */
+    boost::shared_ptr< WModuleInputData< WDataSetScalar > > m_scalarIC;
+    
+    /**
+     * The transfer function as an input data set
+     */
+	boost::shared_ptr< WModuleInputData< WDataSetSingle > > m_transferFunction;
+
+    /**
+     * The OSG root node for this module. All other geodes or OSG nodes will be attached on this single node.
+     */
+	osg::ref_ptr< WGEManagedGroupNode > m_rootNode;
+    /**
+     * Needed for recreating the geometry, incase when resolution changes.
+     */
+	boost::shared_ptr< WCondition > m_propCondition;
+    
+	typedef WItemSelectionItemTyped< PlaneType > MyItemType;
+    
+	boost::shared_ptr< WItemSelection > m_possibleSelectionsUsingTypes;
+    
+	WPropSelection		m_singleSelectionAxialTop, m_singleSelectionAxialBottom,
+		m_singleSelectionCoronalTop, m_singleSelectionCoronalBottom,
+		m_singleSelectionSagittalTop, m_singleSelectionSagittalBottom;
+		
+	WPropDouble   m_earlyRayTerminationAlpha;
+
+    // Output
+	WPropPosition				m_maxCoordsPosition;
+	WPropPosition				m_normalOut;
+	WPropInt					m_planeTypes[6];
+
+	osg::ref_ptr< WGEShader >	m_shader;
+
+	boost::shared_ptr< WDataSetScalar > scalarData;
+};
+
+#endif  // WMProject_H
--- a/src/modules/projectionsAsContext/WMProject.png
+++ b/src/modules/projectionsAsContext/WMProject.png
--- a/src/modules/projectionsAsContext/WMProject.xpm
+++ b/src/modules/projectionsAsContext/WMProject.xpm
+/* XPM */
+static const char * WMProject_xpm[] = {
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--- a/src/modules/projectionsAsContext/shaders/WMProject-fragment.glsl
+++ b/src/modules/projectionsAsContext/shaders/WMProject-fragment.glsl
+//---------------------------------------------------------------------------
+//
+// Project: OpenWalnut ( http://www.openwalnut.org )
+//
+// Copyright 2009 OpenWalnut Community, BSV@Uni-Leipzig and CNCF@MPI-CBS
+// For more information see http://www.openwalnut.org/copying
+//
+// This file is part of OpenWalnut.
+//
+// OpenWalnut is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// OpenWalnut 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 Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with OpenWalnut. If not, see <http://www.gnu.org/licenses/>.
+//
+//---------------------------------------------------------------------------
+
+#version 130
+
+#include "WGEColormapping-fragment.glsl"
+
+// If this uniform is true, the plane should not discard fragments
+uniform bool u_showComplete;
+uniform vec3 maxCoords; // contains the size of the 3d texture
+uniform sampler1D u_transferFunctionSampler; // contains the transfer function histogram
+
+/*
+  Values are the same as in the enum Type PlaneType
+  in WMProject.h e. g. 
+  0: None
+  1: MIP
+  2: Compositing F2B
+  3: Compositing B2F
+*/
+uniform int axialTop;
+uniform int axialBottom;
+uniform int coronalTop;
+uniform int coronalBottom;
+uniform int sagittalTop;
+uniform int sagittalBottom;
+
+uniform float earlyRayTerminationAlpha;
+
+varying vec3 normal;
+
+void doMIP(vec3 initialPosition, int direction, float maxSize)
+{
+	float maxColor = 0.0;
+	for(float n = 0.0; n < 1.0; n += 1.0/maxSize)
+	{
+		initialPosition[direction] = n;
+		if(texture3D( u_colormap0Sampler, initialPosition ).r > maxColor)
+			maxColor = texture3D( u_colormap0Sampler, initialPosition ).r;
+	}
+	gl_FragColor = vec4(maxColor,maxColor,maxColor,1.0);
+}
+
+void doCompositingF2B(vec3 initialPosition, int direction, float maxSize)
+{
+	vec3 finalColor = texture1D( u_transferFunctionSampler, texture3D( u_colormap0Sampler, initialPosition ).r ).rgb;
+	float finalAlpha = texture1D( u_transferFunctionSampler, texture3D( u_colormap0Sampler, initialPosition ).r ).a;
+  
+	bool front = initialPosition[direction] == 0.0;
+	float n;
+	bool run = true;
+	if(front)
+	{
+		n = 1.0/maxSize;
+	}
+	else
+	{
+		n = 1.0 - 1.0/maxSize; // invert
+	}
+  
+	while(run)
+	{
+		initialPosition[direction] = n;
+		vec4 nextPlane = texture1D( u_transferFunctionSampler, texture3D( u_colormap0Sampler, initialPosition ).r );
+		nextPlane = vec4(nextPlane.rgb*nextPlane.a,nextPlane.a);
+		
+		// C_out = (1 - a_in)*C + C_in
+		finalColor = (1-finalAlpha)*nextPlane.rgb+finalColor;
+		
+		// a_out = (1 - a_in)*a + a_in
+		finalAlpha = (1-finalAlpha)*nextPlane.a+finalAlpha;
+		
+		if(finalAlpha > earlyRayTerminationAlpha)
+		{
+			run = false; // Early Ray Termination
+		}else{
+			if(front)
+			{
+				n += 1.0/maxSize;
+				if(n > 1.0)
+				{
+					run = false;
+				}
+			}
+			else
+			{
+				n -= 1.0/maxSize;
+				if(n < 0.0)
+				{
+					run = false;
+				}
+			}
+		}
+	}
+	gl_FragColor = vec4(finalColor, 1.0);
+}
+
+void doCompositingB2F(vec3 initialPosition, int direction, float maxSize)
+{
+	bool front = initialPosition[direction] == 0.0;
+	float n;
+	bool run = true;
+	vec3 finalColor =