EgtGraphics 1.5j6 :

- aggiunta gestione griglia.
2014-10-30 08:49:48 +00:00
parent e1e4af8792
commit 0c8735f612
9 changed files with 317 additions and 39 deletions
@@ -0,0 +1,167 @@
+//----------------------------------------------------------------------------
+//  EgalTech 2014-2014
+//----------------------------------------------------------------------------
+// File : SceneGrid.cpp       Data : 25.10.14          Versione : 1.5j6
+// Contenuto : Implementazione snap di punti trmite selezione.
+//
+//
+//
+// Modifiche : 25.10.14 DS Creazione modulo.
+//
+//
+//----------------------------------------------------------------------------
+
+//--------------------------- Include ----------------------------------------
+#include "stdafx.h"
+#include "Scene.h"
+#include "EGrUtils.h"
+
+
+using namespace std ;
+
+//----------------------------------------------------------------------------
+bool
+Scene::SetGridShow( bool bShowGrid, bool bShowFrame)
+{
+   m_bShowGrid = bShowGrid ;
+   m_bShowFrame = bShowFrame ;
+   return true ;
+}
+
+//----------------------------------------------------------------------------
+bool
+Scene::SetGridFrame( const Frame3d& frFrame)
+{
+   if ( ! frFrame.IsValid())
+      return false ;
+   m_frGrid = frFrame ;
+   return true ;
+}
+
+//----------------------------------------------------------------------------
+bool
+Scene::SetGridGeo( double dSnapStep, int nMinLineSstep, int nMajLineSstep, int nExtSstep)
+{
+   const double MIN_SNAP_STEP = 0.1 ;
+   m_dSnapStep = max( fabs( dSnapStep), MIN_SNAP_STEP) ;
+   m_nMinLineSstep = abs( nMinLineSstep) ;
+   m_nMajLineSstep = abs( nMajLineSstep) ;
+   m_nExtSstep = abs( nExtSstep) ;
+   return true ;
+}
+
+//----------------------------------------------------------------------------
+bool
+Scene::SetGridColor( Color colMinLine, Color colMajLine)
+{
+   m_colMinLine = colMinLine ;
+   m_colMajLine = colMajLine ;
+   return true ;
+}
+
+//----------------------------------------------------------------------------
+bool
+Scene::DrawGrid( void)
+{
+  // se non devo disegnare, esco subito
+   if ( ! m_bShowGrid  &&  ! m_bShowFrame)
+      return true ;
+
+  // imposto il riferimento
+   glPushMatrix() ;
+   double Matrix[OGLMAT_DIM] ;
+   if ( FrameToOpenGlMatrix( m_frGrid, Matrix))
+      glMultMatrixd( Matrix) ;
+
+  // semi-estensione della griglia
+   float dExt = float( m_nExtSstep * m_dSnapStep) ;
+  // abbassamento in Z per evitare sovrapposizioni con geometria
+   const float Z_DOWN = float( - 0.01) ;
+
+  // se richiesto, disegno la griglia
+   if ( m_bShowGrid) {
+     // disegno linee minori (a trattini)
+      glLineStipple( 2, 0xAAAA) ;
+      glEnable( GL_LINE_STIPPLE) ;
+      glBegin( GL_LINES) ;
+      glColor3f( m_colMinLine.GetRed(), m_colMinLine.GetGreen(), m_colMinLine.GetBlue()) ;
+      for ( int i = m_nMinLineSstep ; i <= m_nExtSstep ; i += m_nMinLineSstep) {
+        // se non si sovrappongono alle maggiori
+         if ( ( i % m_nMajLineSstep) != 0) {
+            float dPos = float( i * m_dSnapStep) ;
+            // X +
+            glVertex3f( dPos, - dExt, Z_DOWN) ;
+            glVertex3f( dPos, dExt, Z_DOWN) ;
+            // X -
+            glVertex3f( - dPos, - dExt, Z_DOWN) ;
+            glVertex3f( - dPos, dExt, Z_DOWN) ;
+            // Y +
+            glVertex3f( - dExt, dPos, Z_DOWN) ;
+            glVertex3f( dExt, dPos, Z_DOWN) ;
+            // Y -
+            glVertex3f( - dExt, - dPos, Z_DOWN) ;
+            glVertex3f( dExt, - dPos, Z_DOWN) ;
+         }
+      }
+      glEnd() ;
+      glDisable( GL_LINE_STIPPLE) ;
+     // disegno linee maggiori
+      glBegin( GL_LINES) ;
+      glColor3f( m_colMajLine.GetRed(), m_colMajLine.GetGreen(), m_colMajLine.GetBlue()) ;
+      for ( int i = m_nMajLineSstep ; i <= m_nExtSstep ; i += m_nMajLineSstep) {
+         float dPos = float( i * m_dSnapStep) ;
+         // X +
+         glVertex3f( dPos, - dExt, Z_DOWN) ;
+         glVertex3f( dPos, dExt, Z_DOWN) ;
+         // X -
+         glVertex3f( - dPos, - dExt, Z_DOWN) ;
+         glVertex3f( - dPos, dExt, Z_DOWN) ;
+         // Y +
+         glVertex3f( - dExt, dPos, Z_DOWN) ;
+         glVertex3f( dExt, dPos, Z_DOWN) ;
+         // Y -
+         glVertex3f( - dExt, - dPos, Z_DOWN) ;
+         glVertex3f( dExt, - dPos, Z_DOWN) ;
+      }
+      glEnd() ;
+   }
+
+  // se richiesto, disegno assi del frame
+   if ( m_bShowFrame) {
+      glBegin( GL_LINES) ;
+      // asse X+
+      glColor3f( RED.GetRed(), RED.GetGreen(), RED.GetBlue()) ;
+      glVertex3f( 0, 0, Z_DOWN) ;
+      glVertex3f( dExt, 0, Z_DOWN) ;
+      // asse Y+
+      glColor3f( LIME.GetRed(), LIME.GetGreen(), LIME.GetBlue()) ;
+      glVertex3f( 0, 0, Z_DOWN) ;
+      glVertex3f( 0, dExt, Z_DOWN) ;
+      // se richiesta griglia, assi X- e Y-
+      if ( m_bShowGrid) {
+         glColor3f( m_colMajLine.GetRed(), m_colMajLine.GetGreen(), m_colMajLine.GetBlue()) ;
+         glVertex3f( 0, 0, Z_DOWN) ;
+         glVertex3f( -dExt, 0, Z_DOWN) ;
+         glVertex3f( 0, 0, Z_DOWN) ;
+         glVertex3f( 0, -dExt, Z_DOWN) ;
+      }
+      glEnd() ;
+   }
+  // altrimenti, se richiesta sola griglia li disegno come linee principali
+   else if ( m_bShowGrid) {
+      glBegin( GL_LINES) ;
+      glColor3f( m_colMajLine.GetRed(), m_colMajLine.GetGreen(), m_colMajLine.GetBlue()) ;
+      // asse X
+      glVertex3f( - dExt, 0, Z_DOWN) ;
+      glVertex3f( dExt, 0, Z_DOWN) ;
+      // asse Y
+      glVertex3f( 0, - dExt, Z_DOWN) ;
+      glVertex3f( 0, dExt, Z_DOWN) ;
+      glEnd() ;
+   }
+
+  // ripristino lo stack delle matrici
+   glPopMatrix() ;
+
+   return true ;
+}