separated opengl compatibility implementation from core implementation

for lineNode

libs_required/ACG/Scenegraph/LineNode.cc

@@ -232,6 +232,11 @@ void
 LineNode::
 draw(GLState&  _state  , const DrawModes::DrawMode& _drawMode)
 {
+  if(_state.compatibilityProfile())
+    drawCompat(_state, _drawMode);
+  else
+  {
+    /* //Node Based Drawing is not supported on Core profiles
   if (_drawMode & DrawModes::WIREFRAME)
   {
     ACG::GLState::disable(GL_LIGHTING);
@@ -343,6 +348,7 @@ draw(GLState&  _state  , const DrawModes::DrawMode& _drawMode)
     }
 
     //glEnd();
+  }*/
   }
 }
   
@@ -364,13 +370,15 @@ leave(GLState& _state , const DrawModes::DrawMode& _drawMode)
 
 void LineNode::pick(GLState&  _state , PickTarget _target)
 {
+  if(_state.compatibilityProfile())
+    pickCompat(_state, _target);
+  else
+  {
   if (n_points() == 0)
     return;
 
   // Bind the vertex array
   ACG::GLState::bindBuffer(GL_ARRAY_BUFFER_ARB, 0);
-  ACG::GLState::vertexPointer( &(points_)[0] );
-  ACG::GLState::enableClientState(GL_VERTEX_ARRAY);
 
   const size_t n_edges = n_points() - 1;
 
@@ -393,53 +401,14 @@ void LineNode::pick(GLState&  _state , PickTarget _target)
     default:
       break;
   }
-
-  //Disable the vertex array
-  ACG::GLState::disableClientState(GL_VERTEX_ARRAY);
+  }
 }
 
 //----------------------------------------------------------------------------
 
 void LineNode::pick_edges(GLState& _state, unsigned int _offset)
 {
-  // Check if we have any edges to draw (% 0 causes division by zero on windows)
-  if (n_points() < 2)
-    return;
-
-  const float line_width_old = _state.line_width();
-  _state.set_line_width(picking_line_width());
-  _state.pick_set_name (0);
-
-  glDepthRange(0.0, 0.99);
-
-  if (line_mode_ == PolygonMode)
-  {
-    const size_t n_edges = n_points() - 1;
-    for (size_t i = 0; i < n_edges; ++i)
-    {
-      _state.pick_set_name(i + _offset);
-      glBegin(GL_LINES);
-      glArrayElement(static_cast<GLint>(i));
-      glArrayElement(static_cast<GLint>(i + 1));
-      glEnd();
-    }
-  }
-  else if (line_mode_ == LineSegmentsMode)
-  {
-    const size_t n_edges = n_points() / 2;
-    for (size_t i = 0; i < n_edges; ++i)
-    {
-      _state.pick_set_name(i + _offset);
-      glBegin(GL_LINES);
-      glArrayElement(static_cast<GLint>(2*i));
-      glArrayElement(static_cast<GLint>(2*i + 1));
-      glEnd();
-    }
-  }
-
-  glDepthRange(0.0, 1.0);
-
-  _state.set_line_width(line_width_old);
+  //TODO: implement edge picking for lines in CoreProfile
 }
 
 //----------------------------------------------------------------------------

libs_required/ACG/Scenegraph/LineNode.hh

@@ -136,12 +136,14 @@ public:
 
   /// draw lines and normals
   void draw(GLState& _state, const DrawModes::DrawMode& _drawMode);
+  void drawCompat(GLState& _state, const DrawModes::DrawMode& _drawMode);
   
   /// reset depth function to what it was before enter()
   void leave(GLState& _state, const DrawModes::DrawMode& _drawMode);
 
   /// Draw the line using the GL picking name stack
   void pick(GLState&  _state , PickTarget _target);
+  void pickCompat(GLState&  _state , PickTarget _target);
 
   /// reserve mem for _n lines
   void reserve_lines(unsigned int _n) { points_.reserve(2*_n); }
@@ -222,6 +224,7 @@ protected:
 
   void pick_vertices(GLState& _state);
   void pick_edges (GLState& _state, unsigned int _offset);
+  void pick_edgesCompat (GLState& _state, unsigned int _offset);
 
   /// creates the vbo only if update was requested
   void createVBO();

libs_required/ACG/Scenegraph/LineNodeGLCompat.cc

+/*===========================================================================*\
+ *                                                                           *
+ *                              OpenFlipper                                  *
+ *           Copyright (c) 2001-2015, RWTH-Aachen University                 *
+ *           Department of Computer Graphics and Multimedia                  *
+ *                          All rights reserved.                             *
+ *                            www.openflipper.org                            *
+ *                                                                           *
+ *---------------------------------------------------------------------------*
+ * This file is part of OpenFlipper.                                         *
+ *---------------------------------------------------------------------------*
+ *                                                                           *
+ * Redistribution and use in source and binary forms, with or without        *
+ * modification, are permitted provided that the following conditions        *
+ * are met:                                                                  *
+ *                                                                           *
+ * 1. Redistributions of source code must retain the above copyright notice, *
+ *    this list of conditions and the following disclaimer.                  *
+ *                                                                           *
+ * 2. Redistributions in binary form must reproduce the above copyright      *
+ *    notice, this list of conditions and the following disclaimer in the    *
+ *    documentation and/or other materials provided with the distribution.   *
+ *                                                                           *
+ * 3. Neither the name of the copyright holder nor the names of its          *
+ *    contributors may be used to endorse or promote products derived from   *
+ *    this software without specific prior written permission.               *
+ *                                                                           *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS       *
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED *
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A           *
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER *
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,  *
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,       *
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR        *
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF    *
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING      *
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS        *
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.              *
+ *                                                                           *
+\*===========================================================================*/
+
+/*===========================================================================*\
+ *                                                                           *
+ *   $Revision$                                                       *
+ *   $Author$                                                      *
+ *   $Date$                   *
+ *                                                                           *
+\*===========================================================================*/
+
+
+
+
+//=============================================================================
+//
+//  CLASS LineNode - IMPLEMENTATION
+//
+//=============================================================================
+
+//== INCLUDES =================================================================
+#include <ACG/GL/acg_glew.hh>
+#include "LineNode.hh"
+#include <ACG/GL/IRenderer.hh>
+
+//== NAMESPACES ===============================================================
+
+namespace ACG {
+namespace SceneGraph {
+
+//== IMPLEMENTATION ==========================================================
+
+void
+LineNode::
+drawCompat(GLState&  _state  , const DrawModes::DrawMode& _drawMode)
+{
+  if (_drawMode & DrawModes::WIREFRAME)
+  {
+    ACG::GLState::disable(GL_LIGHTING);
+
+
+   // if (line_mode_ == LineSegmentsMode)
+   //   glBegin(GL_LINES);
+   // else
+   //   glBegin(GL_LINE_STRIP);
+
+
+    if (line_mode_ == LineSegmentsMode)
+    {
+      // first check if (new standard) 4-channel colors are specified
+      if( (points_.size()/2 == colors4f_.size()) )
+      {
+        // enable blending of lines
+        GLboolean blendb;
+        glGetBooleanv( GL_BLEND, &blendb);
+        glEnable(GL_BLEND);
+        // blend ontop of prev. drawn mesh
+        GLboolean depthmaskb;
+        glGetBooleanv( GL_DEPTH_WRITEMASK, &depthmaskb);
+        glDepthMask(GL_FALSE);
+
+        glBegin(GL_LINES);
+
+        ConstPointIter p_it=points_.begin(), p_end=points_.end();
+        ConstColor4fIter c_it=colors4f_.begin();
+
+        Color4f c(1.0f,1.0f,1.0f,1.0f);
+        if(c_it != colors4f_.end()) {
+          c = *c_it;
+        }
+
+        int cnt = 0;
+        for (; p_it!=p_end; ++p_it)
+        {
+          if ((cnt > 0) && (cnt % 2 == 0) && (c_it+1) != colors4f_.end()) {
+            ++c_it;
+            c = *c_it;
+          }
+
+          glColor(c);
+          glVertex(*p_it);
+
+          ++cnt;
+        }
+
+        glEnd();
+
+        // disable blending of lines
+        if( blendb == GL_FALSE )
+          glDisable(GL_BLEND);
+
+        // enable depth mask
+        if( depthmaskb == GL_TRUE )
+          glDepthMask(GL_TRUE);
+
+      }
+      else if ((line_mode_ == LineSegmentsMode) && (points_.size()/2 == colors_.size()) )
+      {
+        glBegin(GL_LINES);
+        ConstPointIter p_it=points_.begin(), p_end=points_.end();
+        ConstColorIter c_it=colors_.begin();
+
+        Color c((char)255, (char)255, (char)255);
+        if(c_it != colors_.end()) {
+          c = *c_it;
+        }
+
+        int cnt = 0;
+        for (; p_it!=p_end; ++p_it)
+        {
+          if ((cnt > 0) && (cnt % 2 == 0) && (c_it+1) != colors_.end()) {
+            ++c_it;
+            c = *c_it;
+          }
+
+          glColor(c);
+          glVertex(*p_it);
+
+          ++cnt;
+        }
+        glEnd();
+      }
+      else
+      {
+        glBegin(GL_LINES);
+
+        ConstPointIter p_it=points_.begin(), p_end=points_.end();
+
+        for (; p_it!=p_end; ++p_it)
+        {
+          glVertex(*p_it);
+        }
+
+        glEnd();
+      }
+    }
+    else
+    {
+      _state.set_color(_state.base_color());
+      glBegin(GL_LINE_STRIP);
+      ConstPointIter p_it=points_.begin(), p_end=points_.end();
+      for (; p_it!=p_end; ++p_it)
+        glVertex(*p_it);
+      glEnd();
+    }
+
+    //glEnd();
+  }
+}
+
+//----------------------------------------------------------------------------
+
+void LineNode::pickCompat(GLState&  _state , PickTarget _target)
+{
+  if (n_points() == 0)
+    return;
+
+  // Bind the vertex array
+  ACG::GLState::bindBuffer(GL_ARRAY_BUFFER_ARB, 0);
+  ACG::GLState::vertexPointer( &(points_)[0] );
+  ACG::GLState::enableClientState(GL_VERTEX_ARRAY);
+
+  const size_t n_edges = n_points() - 1;
+
+  switch (_target)
+  {
+    case PICK_EDGE:
+    {
+      _state.pick_set_maximum (n_edges);
+      pick_edgesCompat(_state, 0);
+      break;
+    }
+
+    case PICK_ANYTHING:
+    {
+      _state.pick_set_maximum (n_edges);
+      pick_edgesCompat(_state, 0);
+      break;
+    }
+
+    default:
+      break;
+  }
+
+  //Disable the vertex array
+  ACG::GLState::disableClientState(GL_VERTEX_ARRAY);
+}
+
+//----------------------------------------------------------------------------
+
+void LineNode::pick_edgesCompat(GLState& _state, unsigned int _offset)
+{
+  // Check if we have any edges to draw (% 0 causes division by zero on windows)
+  if (n_points() < 2)
+    return;
+
+  const float line_width_old = _state.line_width();
+  _state.set_line_width(picking_line_width());
+  _state.pick_set_name (0);
+
+  glDepthRange(0.0, 0.99);
+
+  if (line_mode_ == PolygonMode)
+  {
+    const size_t n_edges = n_points() - 1;
+    for (size_t i = 0; i < n_edges; ++i)
+    {
+      _state.pick_set_name(i + _offset);
+      glBegin(GL_LINES);
+      glArrayElement(static_cast<GLint>(i));
+      glArrayElement(static_cast<GLint>(i + 1));
+      glEnd();
+    }
+  }
+  else if (line_mode_ == LineSegmentsMode)
+  {
+    const size_t n_edges = n_points() / 2;
+    for (size_t i = 0; i < n_edges; ++i)
+    {
+      _state.pick_set_name(i + _offset);
+      glBegin(GL_LINES);
+      glArrayElement(static_cast<GLint>(2*i));
+      glArrayElement(static_cast<GLint>(2*i + 1));
+      glEnd();
+    }
+  }
+
+  glDepthRange(0.0, 1.0);
+
+  _state.set_line_width(line_width_old);
+}
+
+//=============================================================================
+} // namespace SceneGraph
+} // namespace ACG
+//=============================================================================