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