EgtGraphics 1.5b2 :

- aggiunta gestione ObjNewGraphics e ObjOldGraphics.

ObjNewGraphics.cpp

@@ -0,0 +1,107 @@
+//----------------------------------------------------------------------------
+//  EgalTech 2014-2014
+//----------------------------------------------------------------------------
+// File : ObjNewGraphics.cpp       Data : 10.02.14          Versione : 1.5b1
+// Contenuto : Implementazione della classe grafica di un oggetto geometrico.
+//
+//
+//
+// Modifiche : 10.02.14 DS Creazione modulo.
+//
+//
+//----------------------------------------------------------------------------
+
+//--------------------------- Include ----------------------------------------
+#include "stdafx.h"
+#include "ObjNewGraphics.h"
+#include "Scene.h"
+
+#define glewGetContext()    (( m_pScene != nullptr) ? m_pScene->glewGetContext() : nullptr)
+
+
+//----------------------------------------------------------------------------
+ObjNewGraphics::~ObjNewGraphics( void)
+{
+  // cancello eventuali vecchi vertici
+   DeleteVaoVbo() ;
+}
+
+//----------------------------------------------------------------------------
+void
+ObjNewGraphics::Invalidate( void)
+{
+   m_bValid = false ;
+}
+
+//----------------------------------------------------------------------------
+bool
+ObjNewGraphics::AddPolyLine( const PolyLine& PL)
+{
+   if ( m_pScene == nullptr  ||  ! m_pScene->MakeCurrent())
+      return false ;
+
+  // cancello eventuali vecchi vertici
+   DeleteVaoVbo() ;
+  // imposto il nuovo stato
+   m_bValid = true ;
+   m_nMode = GL_LINE_STRIP ;
+  // inserisco i nuovi vertici
+   glGenVertexArrays( 1, &m_nVaoId) ;
+   if ( m_nVaoId == 0)
+      return false ;
+   glBindVertexArray( m_nVaoId) ;
+   glGenBuffers( 1, &m_nVboId) ;
+   glBindBuffer( GL_ARRAY_BUFFER, m_nVboId) ;
+   glBufferData( GL_ARRAY_BUFFER, PL.GetPointNbr() * SIZEV3F, NULL, GL_STATIC_DRAW) ;
+   Point3d ptP ;
+   Vert3f  v3V ;
+   m_nCount = 0 ;
+   for ( bool bFound = PL.GetFirstPoint( ptP) ; bFound ; bFound = PL.GetNextPoint( ptP)) {
+      v3V.Set( ptP.x, ptP.y, ptP.z) ;
+      glBufferSubData( GL_ARRAY_BUFFER, m_nCount * SIZEV3F, SIZEV3F, &v3V) ;
+      ++ m_nCount ;
+   }
+   glVertexAttribPointer( (GLuint)0, 3, GL_FLOAT, GL_FALSE, 0, 0) ;
+   glEnableVertexAttribArray( 0) ;
+   glBindVertexArray( 0) ;
+
+   return true ;
+}
+
+//----------------------------------------------------------------------------
+bool
+ObjNewGraphics::Draw( void)
+{
+   if ( m_pScene == nullptr  ||  ! m_pScene->MakeCurrent())
+      return false ;
+
+  // se vuoto non faccio alcunché
+   if ( m_nCount == 0)
+      return true ;
+
+   if ( m_nVaoId != 0) {
+      glBindVertexArray( m_nVaoId) ; 
+      glDrawArrays( m_nMode, 0, m_nCount) ;
+   }
+
+   return true ;
+}
+
+//----------------------------------------------------------------------------
+bool
+ObjNewGraphics::DeleteVaoVbo( void)
+{
+   if ( m_pScene == nullptr  ||  ! m_pScene->MakeCurrent())
+      return false ;
+
+  // cancellazione VAO/VBO
+   if ( m_nCount > 0) {
+      glBindBuffer( GL_ARRAY_BUFFER, 0) ;
+      glDeleteBuffers( 1, &m_nVboId) ;
+      glBindVertexArray( 0) ;
+      glDeleteVertexArrays( 1, &m_nVaoId) ;
+      m_nCount = 0 ;
+   }
+
+   return true ;
+}