1039 lines
32 KiB
C++
1039 lines
32 KiB
C++
/*
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* This program source code file is part of KICAD, a free EDA CAD application.
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*
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* Copyright (C) 2012 Torsten Hueter, torstenhtr <at> gmx.de
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* Copyright (C) 2012 Kicad Developers, see change_log.txt for contributors.
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* Copyright (C) 2013-2015 CERN
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* @author Maciej Suminski <maciej.suminski@cern.ch>
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*
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* Graphics Abstraction Layer (GAL) for OpenGL
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <gal/opengl/opengl_gal.h>
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#include <gal/definitions.h>
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#include <wx/log.h>
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#include <macros.h>
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#ifdef __WXDEBUG__
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#include <profile.h>
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#endif /* __WXDEBUG__ */
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#include <limits>
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using namespace KIGFX;
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// Prototypes
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void InitTesselatorCallbacks( GLUtesselator* aTesselator );
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const int glAttributes[] = { WX_GL_RGBA, WX_GL_DOUBLEBUFFER, WX_GL_DEPTH_SIZE, 24, 0 };
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wxGLContext* OPENGL_GAL::glContext = NULL;
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OPENGL_GAL::OPENGL_GAL( wxWindow* aParent, wxEvtHandler* aMouseListener,
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wxEvtHandler* aPaintListener, const wxString& aName ) :
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wxGLCanvas( aParent, wxID_ANY, (int*) glAttributes, wxDefaultPosition, wxDefaultSize,
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wxEXPAND, aName ),
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parentWindow( aParent ),
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mouseListener( aMouseListener ),
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paintListener( aPaintListener ),
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cachedManager( true ),
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nonCachedManager( false ),
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overlayManager( false )
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{
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// Create the OpenGL-Context
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if( glContext == NULL )
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glContext = new wxGLContext( this );
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aParent->Show(); // wxWidgets require the window to be visible to set its GL context
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// Initialize GLEW, FBOs & VBOs
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SetCurrent( *glContext );
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initGlew();
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// Prepare shaders
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if( !shader.LoadBuiltinShader( 0, SHADER_TYPE_VERTEX ) )
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throw std::runtime_error( "Cannot compile vertex shader!" );
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if( !shader.LoadBuiltinShader( 1, SHADER_TYPE_FRAGMENT ) )
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throw std::runtime_error( "Cannot compile fragment shader!" );
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if( !shader.Link() )
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throw std::runtime_error( "Cannot link the shaders!" );
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// Make VBOs use shaders
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cachedManager.SetShader( shader );
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nonCachedManager.SetShader( shader );
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overlayManager.SetShader( shader );
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// Initialize the flags
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isFramebufferInitialized = false;
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isGrouping = false;
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groupCounter = 0;
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// Connecting the event handlers
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Connect( wxEVT_PAINT, wxPaintEventHandler( OPENGL_GAL::onPaint ) );
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// Mouse events are skipped to the parent
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Connect( wxEVT_MOTION, wxMouseEventHandler( OPENGL_GAL::skipMouseEvent ) );
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Connect( wxEVT_LEFT_DOWN, wxMouseEventHandler( OPENGL_GAL::skipMouseEvent ) );
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Connect( wxEVT_LEFT_UP, wxMouseEventHandler( OPENGL_GAL::skipMouseEvent ) );
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Connect( wxEVT_LEFT_DCLICK, wxMouseEventHandler( OPENGL_GAL::skipMouseEvent ) );
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Connect( wxEVT_MIDDLE_DOWN, wxMouseEventHandler( OPENGL_GAL::skipMouseEvent ) );
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Connect( wxEVT_MIDDLE_UP, wxMouseEventHandler( OPENGL_GAL::skipMouseEvent ) );
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Connect( wxEVT_MIDDLE_DCLICK, wxMouseEventHandler( OPENGL_GAL::skipMouseEvent ) );
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Connect( wxEVT_RIGHT_DOWN, wxMouseEventHandler( OPENGL_GAL::skipMouseEvent ) );
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Connect( wxEVT_RIGHT_UP, wxMouseEventHandler( OPENGL_GAL::skipMouseEvent ) );
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Connect( wxEVT_RIGHT_DCLICK, wxMouseEventHandler( OPENGL_GAL::skipMouseEvent ) );
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Connect( wxEVT_MOUSEWHEEL, wxMouseEventHandler( OPENGL_GAL::skipMouseEvent ) );
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#if defined _WIN32 || defined _WIN64
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Connect( wxEVT_ENTER_WINDOW, wxMouseEventHandler( OPENGL_GAL::skipMouseEvent ) );
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#endif
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SetSize( aParent->GetSize() );
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screenSize = VECTOR2I( aParent->GetSize() );
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// Grid color settings are different in Cairo and OpenGL
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SetGridColor( COLOR4D( 0.8, 0.8, 0.8, 0.1 ) );
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// Tesselator initialization
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tesselator = gluNewTess();
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InitTesselatorCallbacks( tesselator );
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if( tesselator == NULL )
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throw std::runtime_error( "Could not create the tesselator" );
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gluTessProperty( tesselator, GLU_TESS_WINDING_RULE, GLU_TESS_WINDING_POSITIVE );
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currentManager = &nonCachedManager;
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}
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OPENGL_GAL::~OPENGL_GAL()
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{
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glFlush();
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gluDeleteTess( tesselator );
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ClearCache();
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}
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void OPENGL_GAL::BeginDrawing()
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{
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SetCurrent( *glContext );
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clientDC = new wxClientDC( this );
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// Set up the view port
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glMatrixMode( GL_PROJECTION );
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glLoadIdentity();
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glViewport( 0, 0, (GLsizei) screenSize.x, (GLsizei) screenSize.y );
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// Create the screen transformation
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glOrtho( 0, (GLint) screenSize.x, 0, (GLsizei) screenSize.y, -depthRange.x, -depthRange.y );
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if( !isFramebufferInitialized )
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{
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// Prepare rendering target buffers
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compositor.Initialize();
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mainBuffer = compositor.CreateBuffer();
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overlayBuffer = compositor.CreateBuffer();
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isFramebufferInitialized = true;
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}
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// Disable 2D Textures
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glDisable( GL_TEXTURE_2D );
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// Enable the depth buffer
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glEnable( GL_DEPTH_TEST );
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glDepthFunc( GL_LESS );
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// Setup blending, required for transparent objects
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glEnable( GL_BLEND );
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glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
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glMatrixMode( GL_MODELVIEW );
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// Set up the world <-> screen transformation
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ComputeWorldScreenMatrix();
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GLdouble matrixData[16] = { 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1 };
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matrixData[0] = worldScreenMatrix.m_data[0][0];
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matrixData[1] = worldScreenMatrix.m_data[1][0];
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matrixData[2] = worldScreenMatrix.m_data[2][0];
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matrixData[4] = worldScreenMatrix.m_data[0][1];
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matrixData[5] = worldScreenMatrix.m_data[1][1];
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matrixData[6] = worldScreenMatrix.m_data[2][1];
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matrixData[12] = worldScreenMatrix.m_data[0][2];
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matrixData[13] = worldScreenMatrix.m_data[1][2];
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matrixData[14] = worldScreenMatrix.m_data[2][2];
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glLoadMatrixd( matrixData );
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// Set defaults
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SetFillColor( fillColor );
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SetStrokeColor( strokeColor );
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// Unbind buffers - set compositor for direct drawing
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compositor.SetBuffer( OPENGL_COMPOSITOR::DIRECT_RENDERING );
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// Remove all previously stored items
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nonCachedManager.Clear();
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overlayManager.Clear();
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cachedManager.BeginDrawing();
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nonCachedManager.BeginDrawing();
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overlayManager.BeginDrawing();
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}
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void OPENGL_GAL::EndDrawing()
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{
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// Cached & non-cached containers are rendered to the same buffer
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compositor.SetBuffer( mainBuffer );
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nonCachedManager.EndDrawing();
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cachedManager.EndDrawing();
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// Overlay container is rendered to a different buffer
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compositor.SetBuffer( overlayBuffer );
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overlayManager.EndDrawing();
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// Be sure that the framebuffer is not colorized (happens on specific GPU&drivers combinations)
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glColor4d( 1.0, 1.0, 1.0, 1.0 );
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// Draw the remaining contents, blit the rendering targets to the screen, swap the buffers
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compositor.DrawBuffer( mainBuffer );
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compositor.DrawBuffer( overlayBuffer );
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blitCursor();
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glFlush();
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SwapBuffers();
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delete clientDC;
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}
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void OPENGL_GAL::DrawLine( const VECTOR2D& aStartPoint, const VECTOR2D& aEndPoint )
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{
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const VECTOR2D startEndVector = aEndPoint - aStartPoint;
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double lineAngle = startEndVector.Angle();
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currentManager->Color( strokeColor.r, strokeColor.g, strokeColor.b, strokeColor.a );
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drawLineQuad( aStartPoint, aEndPoint );
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// Line caps
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if( lineWidth > 1.0 )
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{
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drawFilledSemiCircle( aStartPoint, lineWidth / 2, lineAngle + M_PI / 2 );
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drawFilledSemiCircle( aEndPoint, lineWidth / 2, lineAngle - M_PI / 2 );
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}
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}
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void OPENGL_GAL::DrawSegment( const VECTOR2D& aStartPoint, const VECTOR2D& aEndPoint,
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double aWidth )
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{
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VECTOR2D startEndVector = aEndPoint - aStartPoint;
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double lineAngle = startEndVector.Angle();
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if( isFillEnabled )
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{
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// Filled tracks
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currentManager->Color( fillColor.r, fillColor.g, fillColor.b, fillColor.a );
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SetLineWidth( aWidth );
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drawLineQuad( aStartPoint, aEndPoint );
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// Draw line caps
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drawFilledSemiCircle( aStartPoint, aWidth / 2, lineAngle + M_PI / 2 );
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drawFilledSemiCircle( aEndPoint, aWidth / 2, lineAngle - M_PI / 2 );
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}
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else
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{
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// Outlined tracks
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double lineLength = startEndVector.EuclideanNorm();
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currentManager->Color( strokeColor.r, strokeColor.g, strokeColor.b, strokeColor.a );
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Save();
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currentManager->Translate( aStartPoint.x, aStartPoint.y, 0.0 );
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currentManager->Rotate( lineAngle, 0.0f, 0.0f, 1.0f );
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drawLineQuad( VECTOR2D( 0.0, aWidth / 2.0 ),
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VECTOR2D( lineLength, aWidth / 2.0 ) );
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drawLineQuad( VECTOR2D( 0.0, -aWidth / 2.0 ),
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VECTOR2D( lineLength, -aWidth / 2.0 ) );
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// Draw line caps
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drawStrokedSemiCircle( VECTOR2D( 0.0, 0.0 ), aWidth / 2, M_PI / 2 );
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drawStrokedSemiCircle( VECTOR2D( lineLength, 0.0 ), aWidth / 2, -M_PI / 2 );
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Restore();
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}
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}
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void OPENGL_GAL::DrawCircle( const VECTOR2D& aCenterPoint, double aRadius )
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{
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if( isFillEnabled )
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{
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currentManager->Color( fillColor.r, fillColor.g, fillColor.b, fillColor.a );
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/* Draw a triangle that contains the circle, then shade it leaving only the circle.
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* Parameters given to setShader are indices of the triangle's vertices
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* (if you want to understand more, check the vertex shader source [shader.vert]).
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* Shader uses this coordinates to determine if fragments are inside the circle or not.
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* v2
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* /\
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* //\\
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* v0 /_\/_\ v1
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*/
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currentManager->Shader( SHADER_FILLED_CIRCLE, 1.0 );
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currentManager->Vertex( aCenterPoint.x - aRadius * sqrt( 3.0f ), // v0
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aCenterPoint.y - aRadius, layerDepth );
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currentManager->Shader( SHADER_FILLED_CIRCLE, 2.0 );
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currentManager->Vertex( aCenterPoint.x + aRadius * sqrt( 3.0f ), // v1
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aCenterPoint.y - aRadius, layerDepth );
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currentManager->Shader( SHADER_FILLED_CIRCLE, 3.0 );
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currentManager->Vertex( aCenterPoint.x, aCenterPoint.y + aRadius * 2.0f, // v2
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layerDepth );
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}
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if( isStrokeEnabled )
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{
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currentManager->Color( strokeColor.r, strokeColor.g, strokeColor.b, strokeColor.a );
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/* Draw a triangle that contains the circle, then shade it leaving only the circle.
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* Parameters given to setShader are indices of the triangle's vertices
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* (if you want to understand more, check the vertex shader source [shader.vert]).
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* and the line width. Shader uses this coordinates to determine if fragments are
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* inside the circle or not.
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* v2
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* /\
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* //\\
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* v0 /_\/_\ v1
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*/
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double outerRadius = aRadius + ( lineWidth / 2 );
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currentManager->Shader( SHADER_STROKED_CIRCLE, 1.0, aRadius, lineWidth );
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currentManager->Vertex( aCenterPoint.x - outerRadius * sqrt( 3.0f ), // v0
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aCenterPoint.y - outerRadius, layerDepth );
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currentManager->Shader( SHADER_STROKED_CIRCLE, 2.0, aRadius, lineWidth );
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currentManager->Vertex( aCenterPoint.x + outerRadius * sqrt( 3.0f ), // v1
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aCenterPoint.y - outerRadius, layerDepth );
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currentManager->Shader( SHADER_STROKED_CIRCLE, 3.0, aRadius, lineWidth );
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currentManager->Vertex( aCenterPoint.x, aCenterPoint.y + outerRadius * 2.0f, // v2
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layerDepth );
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}
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}
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void OPENGL_GAL::DrawArc( const VECTOR2D& aCenterPoint, double aRadius, double aStartAngle,
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double aEndAngle )
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{
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if( aRadius <= 0 )
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return;
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// Swap the angles, if start angle is greater than end angle
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SWAP( aStartAngle, >, aEndAngle );
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Save();
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currentManager->Translate( aCenterPoint.x, aCenterPoint.y, layerDepth );
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if( isStrokeEnabled )
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{
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const double alphaIncrement = 2.0 * M_PI / CIRCLE_POINTS;
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currentManager->Color( strokeColor.r, strokeColor.g, strokeColor.b, strokeColor.a );
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VECTOR2D p( cos( aStartAngle ) * aRadius, sin( aStartAngle ) * aRadius );
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double alpha;
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for( alpha = aStartAngle + alphaIncrement; alpha <= aEndAngle; alpha += alphaIncrement )
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{
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VECTOR2D p_next( cos( alpha ) * aRadius, sin( alpha ) * aRadius );
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DrawLine( p, p_next );
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p = p_next;
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}
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// Draw the last missing part
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if( alpha != aEndAngle )
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{
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VECTOR2D p_last( cos( aEndAngle ) * aRadius, sin( aEndAngle ) * aRadius );
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DrawLine( p, p_last );
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}
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}
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if( isFillEnabled )
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{
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const double alphaIncrement = 2 * M_PI / CIRCLE_POINTS;
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double alpha;
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currentManager->Color( fillColor.r, fillColor.g, fillColor.b, fillColor.a );
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currentManager->Shader( SHADER_NONE );
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// Triangle fan
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for( alpha = aStartAngle; ( alpha + alphaIncrement ) < aEndAngle; )
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{
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currentManager->Vertex( 0.0, 0.0, 0.0 );
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currentManager->Vertex( cos( alpha ) * aRadius, sin( alpha ) * aRadius, 0.0 );
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alpha += alphaIncrement;
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currentManager->Vertex( cos( alpha ) * aRadius, sin( alpha ) * aRadius, 0.0 );
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}
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// The last missing triangle
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const VECTOR2D endPoint( cos( aEndAngle ) * aRadius, sin( aEndAngle ) * aRadius );
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currentManager->Vertex( 0.0, 0.0, 0.0 );
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currentManager->Vertex( cos( alpha ) * aRadius, sin( alpha ) * aRadius, 0.0 );
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currentManager->Vertex( endPoint.x, endPoint.y, 0.0 );
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}
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Restore();
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}
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void OPENGL_GAL::DrawRectangle( const VECTOR2D& aStartPoint, const VECTOR2D& aEndPoint )
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{
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// Compute the diagonal points of the rectangle
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VECTOR2D diagonalPointA( aEndPoint.x, aStartPoint.y );
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VECTOR2D diagonalPointB( aStartPoint.x, aEndPoint.y );
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// Stroke the outline
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if( isStrokeEnabled )
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{
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currentManager->Color( strokeColor.r, strokeColor.g, strokeColor.b, strokeColor.a );
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std::deque<VECTOR2D> pointList;
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pointList.push_back( aStartPoint );
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pointList.push_back( diagonalPointA );
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pointList.push_back( aEndPoint );
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pointList.push_back( diagonalPointB );
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pointList.push_back( aStartPoint );
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DrawPolyline( pointList );
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}
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// Fill the rectangle
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if( isFillEnabled )
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{
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currentManager->Shader( SHADER_NONE );
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currentManager->Color( fillColor.r, fillColor.g, fillColor.b, fillColor.a );
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currentManager->Vertex( aStartPoint.x, aStartPoint.y, layerDepth );
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currentManager->Vertex( diagonalPointA.x, diagonalPointA.y, layerDepth );
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currentManager->Vertex( aEndPoint.x, aEndPoint.y, layerDepth );
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currentManager->Vertex( aStartPoint.x, aStartPoint.y, layerDepth );
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currentManager->Vertex( aEndPoint.x, aEndPoint.y, layerDepth );
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currentManager->Vertex( diagonalPointB.x, diagonalPointB.y, layerDepth );
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}
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}
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void OPENGL_GAL::DrawPolyline( std::deque<VECTOR2D>& aPointList )
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{
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if( aPointList.empty() )
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return;
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currentManager->Color( strokeColor.r, strokeColor.g, strokeColor.b, strokeColor.a );
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std::deque<VECTOR2D>::const_iterator it = aPointList.begin();
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// Start from the second point
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for( ++it; it != aPointList.end(); ++it )
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{
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const VECTOR2D startEndVector = ( *it - *( it - 1 ) );
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double lineAngle = startEndVector.Angle();
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drawLineQuad( *( it - 1 ), *it );
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// There is no need to draw line caps on both ends of polyline's segments
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drawFilledSemiCircle( *( it - 1 ), lineWidth / 2, lineAngle + M_PI / 2 );
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}
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// ..and now - draw the ending cap
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const VECTOR2D startEndVector = ( *( it - 1 ) - *( it - 2 ) );
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double lineAngle = startEndVector.Angle();
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drawFilledSemiCircle( *( it - 1 ), lineWidth / 2, lineAngle - M_PI / 2 );
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}
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|
|
void OPENGL_GAL::DrawPolygon( const std::deque<VECTOR2D>& aPointList )
|
|
{
|
|
// Any non convex polygon needs to be tesselated
|
|
// for this purpose the GLU standard functions are used
|
|
currentManager->Shader( SHADER_NONE );
|
|
currentManager->Color( fillColor.r, fillColor.g, fillColor.b, fillColor.a );
|
|
|
|
TessParams params = { currentManager, tessIntersects };
|
|
gluTessBeginPolygon( tesselator, ¶ms );
|
|
gluTessBeginContour( tesselator );
|
|
|
|
boost::shared_array<GLdouble> points( new GLdouble[3 * aPointList.size()] );
|
|
int v = 0;
|
|
for( std::deque<VECTOR2D>::const_iterator it = aPointList.begin(); it != aPointList.end(); ++it )
|
|
{
|
|
points[v] = it->x;
|
|
points[v + 1] = it->y;
|
|
points[v + 2] = layerDepth;
|
|
gluTessVertex( tesselator, &points[v], &points[v] );
|
|
v += 3;
|
|
}
|
|
|
|
gluTessEndContour( tesselator );
|
|
gluTessEndPolygon( tesselator );
|
|
|
|
// Free allocated intersecting points
|
|
tessIntersects.clear();
|
|
|
|
// vertexList destroyed here
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::DrawCurve( const VECTOR2D& aStartPoint, const VECTOR2D& aControlPointA,
|
|
const VECTOR2D& aControlPointB, const VECTOR2D& aEndPoint )
|
|
{
|
|
// FIXME The drawing quality needs to be improved
|
|
// FIXME Perhaps choose a quad/triangle strip instead?
|
|
// FIXME Brute force method, use a better (recursive?) algorithm
|
|
|
|
std::deque<VECTOR2D> pointList;
|
|
|
|
double t = 0.0;
|
|
double dt = 1.0 / (double) CURVE_POINTS;
|
|
|
|
for( int i = 0; i <= CURVE_POINTS; i++ )
|
|
{
|
|
double omt = 1.0 - t;
|
|
double omt2 = omt * omt;
|
|
double omt3 = omt * omt2;
|
|
double t2 = t * t;
|
|
double t3 = t * t2;
|
|
|
|
VECTOR2D vertex = omt3 * aStartPoint + 3.0 * t * omt2 * aControlPointA
|
|
+ 3.0 * t2 * omt * aControlPointB + t3 * aEndPoint;
|
|
|
|
pointList.push_back( vertex );
|
|
|
|
t += dt;
|
|
}
|
|
|
|
DrawPolyline( pointList );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::ResizeScreen( int aWidth, int aHeight )
|
|
{
|
|
screenSize = VECTOR2I( aWidth, aHeight );
|
|
|
|
// Resize framebuffers
|
|
compositor.Resize( aWidth, aHeight );
|
|
isFramebufferInitialized = false;
|
|
|
|
wxGLCanvas::SetSize( aWidth, aHeight );
|
|
}
|
|
|
|
|
|
bool OPENGL_GAL::Show( bool aShow )
|
|
{
|
|
bool s = wxGLCanvas::Show( aShow );
|
|
|
|
if( aShow )
|
|
wxGLCanvas::Raise();
|
|
|
|
return s;
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::Flush()
|
|
{
|
|
glFlush();
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::ClearScreen( const COLOR4D& aColor )
|
|
{
|
|
// Clear screen
|
|
glClearColor( aColor.r, aColor.g, aColor.b, aColor.a );
|
|
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::Transform( const MATRIX3x3D& aTransformation )
|
|
{
|
|
GLdouble matrixData[16] = { 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1 };
|
|
|
|
matrixData[0] = aTransformation.m_data[0][0];
|
|
matrixData[1] = aTransformation.m_data[1][0];
|
|
matrixData[2] = aTransformation.m_data[2][0];
|
|
matrixData[4] = aTransformation.m_data[0][1];
|
|
matrixData[5] = aTransformation.m_data[1][1];
|
|
matrixData[6] = aTransformation.m_data[2][1];
|
|
matrixData[12] = aTransformation.m_data[0][2];
|
|
matrixData[13] = aTransformation.m_data[1][2];
|
|
matrixData[14] = aTransformation.m_data[2][2];
|
|
|
|
glMultMatrixd( matrixData );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::Rotate( double aAngle )
|
|
{
|
|
currentManager->Rotate( aAngle, 0.0f, 0.0f, 1.0f );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::Translate( const VECTOR2D& aVector )
|
|
{
|
|
currentManager->Translate( aVector.x, aVector.y, 0.0f );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::Scale( const VECTOR2D& aScale )
|
|
{
|
|
currentManager->Scale( aScale.x, aScale.y, 0.0f );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::Save()
|
|
{
|
|
currentManager->PushMatrix();
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::Restore()
|
|
{
|
|
currentManager->PopMatrix();
|
|
}
|
|
|
|
|
|
int OPENGL_GAL::BeginGroup()
|
|
{
|
|
isGrouping = true;
|
|
|
|
boost::shared_ptr<VERTEX_ITEM> newItem( new VERTEX_ITEM( cachedManager ) );
|
|
int groupNumber = getNewGroupNumber();
|
|
groups.insert( std::make_pair( groupNumber, newItem ) );
|
|
|
|
return groupNumber;
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::EndGroup()
|
|
{
|
|
cachedManager.FinishItem();
|
|
isGrouping = false;
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::DrawGroup( int aGroupNumber )
|
|
{
|
|
cachedManager.DrawItem( *groups[aGroupNumber] );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::ChangeGroupColor( int aGroupNumber, const COLOR4D& aNewColor )
|
|
{
|
|
cachedManager.ChangeItemColor( *groups[aGroupNumber], aNewColor );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::ChangeGroupDepth( int aGroupNumber, int aDepth )
|
|
{
|
|
cachedManager.ChangeItemDepth( *groups[aGroupNumber], aDepth );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::DeleteGroup( int aGroupNumber )
|
|
{
|
|
// Frees memory in the container as well
|
|
groups.erase( aGroupNumber );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::ClearCache()
|
|
{
|
|
groups.clear();
|
|
cachedManager.Clear();
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::SaveScreen()
|
|
{
|
|
wxASSERT_MSG( false, wxT( "Not implemented yet" ) );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::RestoreScreen()
|
|
{
|
|
wxASSERT_MSG( false, wxT( "Not implemented yet" ) );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::SetTarget( RENDER_TARGET aTarget )
|
|
{
|
|
switch( aTarget )
|
|
{
|
|
default:
|
|
case TARGET_CACHED:
|
|
currentManager = &cachedManager;
|
|
break;
|
|
|
|
case TARGET_NONCACHED:
|
|
currentManager = &nonCachedManager;
|
|
break;
|
|
|
|
case TARGET_OVERLAY:
|
|
currentManager = &overlayManager;
|
|
break;
|
|
}
|
|
|
|
currentTarget = aTarget;
|
|
}
|
|
|
|
|
|
RENDER_TARGET OPENGL_GAL::GetTarget() const
|
|
{
|
|
return currentTarget;
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::ClearTarget( RENDER_TARGET aTarget )
|
|
{
|
|
// Save the current state
|
|
unsigned int oldTarget = compositor.GetBuffer();
|
|
|
|
switch( aTarget )
|
|
{
|
|
// Cached and noncached items are rendered to the same buffer
|
|
default:
|
|
case TARGET_CACHED:
|
|
case TARGET_NONCACHED:
|
|
compositor.SetBuffer( mainBuffer );
|
|
break;
|
|
|
|
case TARGET_OVERLAY:
|
|
compositor.SetBuffer( overlayBuffer );
|
|
break;
|
|
}
|
|
|
|
compositor.ClearBuffer();
|
|
|
|
// Restore the previous state
|
|
compositor.SetBuffer( oldTarget );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::DrawCursor( const VECTOR2D& aCursorPosition )
|
|
{
|
|
// Now we should only store the position of the mouse cursor
|
|
// The real drawing routines are in blitCursor()
|
|
VECTOR2D screenCursor = worldScreenMatrix * aCursorPosition;
|
|
cursorPosition = screenWorldMatrix * VECTOR2D( screenCursor.x, screenSize.y - screenCursor.y );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::drawGridLine( const VECTOR2D& aStartPoint, const VECTOR2D& aEndPoint )
|
|
{
|
|
compositor.SetBuffer( mainBuffer );
|
|
|
|
// We do not need a very precise comparison here (the lineWidth is set by GAL::DrawGrid())
|
|
if( fabs( lineWidth - 2.0 * gridLineWidth / worldScale ) < 0.1 )
|
|
glLineWidth( 1.0 );
|
|
else
|
|
glLineWidth( 2.0 );
|
|
|
|
glColor4d( gridColor.r, gridColor.g, gridColor.b, gridColor.a );
|
|
|
|
glBegin( GL_LINES );
|
|
glVertex3d( aStartPoint.x, aStartPoint.y, layerDepth );
|
|
glVertex3d( aEndPoint.x, aEndPoint.y, layerDepth );
|
|
glEnd();
|
|
|
|
// Restore the default color, so textures will be drawn properly
|
|
glColor4d( 1.0, 1.0, 1.0, 1.0 );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::drawLineQuad( const VECTOR2D& aStartPoint, const VECTOR2D& aEndPoint )
|
|
{
|
|
/* Helper drawing: ____--- v3 ^
|
|
* ____---- ... \ \
|
|
* ____---- ... \ end \
|
|
* v1 ____---- ... ____---- \ width
|
|
* ---- ...___---- \ \
|
|
* \ ___...-- \ v
|
|
* \ ____----... ____---- v2
|
|
* ---- ... ____----
|
|
* start \ ... ____----
|
|
* \... ____----
|
|
* ----
|
|
* v0
|
|
* dots mark triangles' hypotenuses
|
|
*/
|
|
|
|
VECTOR2D startEndVector = aEndPoint - aStartPoint;
|
|
double lineLength = startEndVector.EuclideanNorm();
|
|
|
|
if( lineLength <= 0.0 )
|
|
return;
|
|
|
|
double scale = 0.5 * lineWidth / lineLength;
|
|
|
|
// The perpendicular vector also needs transformations
|
|
glm::vec4 vector = currentManager->GetTransformation() *
|
|
glm::vec4( -startEndVector.y * scale, startEndVector.x * scale, 0.0, 0.0 );
|
|
|
|
// Line width is maintained by the vertex shader
|
|
currentManager->Shader( SHADER_LINE, vector.x, vector.y, lineWidth );
|
|
currentManager->Vertex( aStartPoint.x, aStartPoint.y, layerDepth ); // v0
|
|
|
|
currentManager->Shader( SHADER_LINE, -vector.x, -vector.y, lineWidth );
|
|
currentManager->Vertex( aStartPoint.x, aStartPoint.y, layerDepth ); // v1
|
|
|
|
currentManager->Shader( SHADER_LINE, -vector.x, -vector.y, lineWidth );
|
|
currentManager->Vertex( aEndPoint.x, aEndPoint.y, layerDepth ); // v3
|
|
|
|
currentManager->Shader( SHADER_LINE, vector.x, vector.y, lineWidth );
|
|
currentManager->Vertex( aStartPoint.x, aStartPoint.y, layerDepth ); // v0
|
|
|
|
currentManager->Shader( SHADER_LINE, -vector.x, -vector.y, lineWidth );
|
|
currentManager->Vertex( aEndPoint.x, aEndPoint.y, layerDepth ); // v3
|
|
|
|
currentManager->Shader( SHADER_LINE, vector.x, vector.y, lineWidth );
|
|
currentManager->Vertex( aEndPoint.x, aEndPoint.y, layerDepth ); // v2
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::drawSemiCircle( const VECTOR2D& aCenterPoint, double aRadius, double aAngle )
|
|
{
|
|
if( isFillEnabled )
|
|
{
|
|
currentManager->Color( fillColor.r, fillColor.g, fillColor.b, fillColor.a );
|
|
drawFilledSemiCircle( aCenterPoint, aRadius, aAngle );
|
|
}
|
|
|
|
if( isStrokeEnabled )
|
|
{
|
|
currentManager->Color( strokeColor.r, strokeColor.g, strokeColor.b, strokeColor.a );
|
|
drawStrokedSemiCircle( aCenterPoint, aRadius, aAngle );
|
|
}
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::drawFilledSemiCircle( const VECTOR2D& aCenterPoint, double aRadius,
|
|
double aAngle )
|
|
{
|
|
Save();
|
|
currentManager->Translate( aCenterPoint.x, aCenterPoint.y, 0.0f );
|
|
currentManager->Rotate( aAngle, 0.0f, 0.0f, 1.0f );
|
|
|
|
/* Draw a triangle that contains the semicircle, then shade it to leave only
|
|
* the semicircle. Parameters given to setShader are indices of the triangle's vertices
|
|
* (if you want to understand more, check the vertex shader source [shader.vert]).
|
|
* Shader uses these coordinates to determine if fragments are inside the semicircle or not.
|
|
* v2
|
|
* /\
|
|
* /__\
|
|
* v0 //__\\ v1
|
|
*/
|
|
currentManager->Shader( SHADER_FILLED_CIRCLE, 4.0f );
|
|
currentManager->Vertex( -aRadius * 3.0f / sqrt( 3.0f ), 0.0f, layerDepth ); // v0
|
|
|
|
currentManager->Shader( SHADER_FILLED_CIRCLE, 5.0f );
|
|
currentManager->Vertex( aRadius * 3.0f / sqrt( 3.0f ), 0.0f, layerDepth ); // v1
|
|
|
|
currentManager->Shader( SHADER_FILLED_CIRCLE, 6.0f );
|
|
currentManager->Vertex( 0.0f, aRadius * 2.0f, layerDepth ); // v2
|
|
|
|
Restore();
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::drawStrokedSemiCircle( const VECTOR2D& aCenterPoint, double aRadius,
|
|
double aAngle )
|
|
{
|
|
double outerRadius = aRadius + ( lineWidth / 2 );
|
|
|
|
Save();
|
|
currentManager->Translate( aCenterPoint.x, aCenterPoint.y, 0.0f );
|
|
currentManager->Rotate( aAngle, 0.0f, 0.0f, 1.0f );
|
|
|
|
/* Draw a triangle that contains the semicircle, then shade it to leave only
|
|
* the semicircle. Parameters given to setShader are indices of the triangle's vertices
|
|
* (if you want to understand more, check the vertex shader source [shader.vert]), the
|
|
* radius and the line width. Shader uses these coordinates to determine if fragments are
|
|
* inside the semicircle or not.
|
|
* v2
|
|
* /\
|
|
* /__\
|
|
* v0 //__\\ v1
|
|
*/
|
|
currentManager->Shader( SHADER_STROKED_CIRCLE, 4.0f, aRadius, lineWidth );
|
|
currentManager->Vertex( -outerRadius * 3.0f / sqrt( 3.0f ), 0.0f, layerDepth ); // v0
|
|
|
|
currentManager->Shader( SHADER_STROKED_CIRCLE, 5.0f, aRadius, lineWidth );
|
|
currentManager->Vertex( outerRadius * 3.0f / sqrt( 3.0f ), 0.0f, layerDepth ); // v1
|
|
|
|
currentManager->Shader( SHADER_STROKED_CIRCLE, 6.0f, aRadius, lineWidth );
|
|
currentManager->Vertex( 0.0f, outerRadius * 2.0f, layerDepth ); // v2
|
|
|
|
Restore();
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::onPaint( wxPaintEvent& WXUNUSED( aEvent ) )
|
|
{
|
|
PostPaint();
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::skipMouseEvent( wxMouseEvent& aEvent )
|
|
{
|
|
// Post the mouse event to the event listener registered in constructor, if any
|
|
if( mouseListener )
|
|
wxPostEvent( mouseListener, aEvent );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::initGlew()
|
|
{
|
|
// Initialize GLEW library
|
|
GLenum err = glewInit();
|
|
|
|
if( GLEW_OK != err )
|
|
{
|
|
throw std::runtime_error( (const char*) glewGetErrorString( err ) );
|
|
}
|
|
else
|
|
{
|
|
wxLogDebug( wxString( wxT( "Status: Using GLEW " ) ) +
|
|
FROM_UTF8( (char*) glewGetString( GLEW_VERSION ) ) );
|
|
}
|
|
|
|
// Check the OpenGL version (minimum 2.1 is required)
|
|
if( GLEW_VERSION_2_1 )
|
|
wxLogInfo( wxT( "OpenGL 2.1 supported." ) );
|
|
else
|
|
throw std::runtime_error( "OpenGL 2.1 or higher is required!" );
|
|
|
|
// Framebuffers have to be supported
|
|
if( !GLEW_EXT_framebuffer_object )
|
|
throw std::runtime_error( "Framebuffer objects are not supported!" );
|
|
|
|
// Vertex buffer has to be supported
|
|
if( !GLEW_ARB_vertex_buffer_object )
|
|
throw std::runtime_error( "Vertex buffer objects are not supported!" );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::blitCursor()
|
|
{
|
|
if( !isCursorEnabled )
|
|
return;
|
|
|
|
compositor.SetBuffer( OPENGL_COMPOSITOR::DIRECT_RENDERING );
|
|
|
|
VECTOR2D cursorBegin = cursorPosition - cursorSize / ( 2 * worldScale );
|
|
VECTOR2D cursorEnd = cursorPosition + cursorSize / ( 2 * worldScale );
|
|
VECTOR2D cursorCenter = ( cursorBegin + cursorEnd ) / 2;
|
|
|
|
glDisable( GL_TEXTURE_2D );
|
|
glLineWidth( 1.0 );
|
|
glColor4d( cursorColor.r, cursorColor.g, cursorColor.b, cursorColor.a );
|
|
|
|
glBegin( GL_LINES );
|
|
glVertex2d( cursorCenter.x, cursorBegin.y );
|
|
glVertex2d( cursorCenter.x, cursorEnd.y );
|
|
|
|
glVertex2d( cursorBegin.x, cursorCenter.y );
|
|
glVertex2d( cursorEnd.x, cursorCenter.y );
|
|
glEnd();
|
|
}
|
|
|
|
|
|
unsigned int OPENGL_GAL::getNewGroupNumber()
|
|
{
|
|
wxASSERT_MSG( groups.size() < std::numeric_limits<unsigned int>::max(),
|
|
wxT( "There are no free slots to store a group" ) );
|
|
|
|
while( groups.find( groupCounter ) != groups.end() )
|
|
{
|
|
groupCounter++;
|
|
}
|
|
|
|
return groupCounter++;
|
|
}
|
|
|
|
|
|
// -------------------------------------
|
|
// Callback functions for the tesselator
|
|
// -------------------------------------
|
|
|
|
// Compare Redbook Chapter 11
|
|
void CALLBACK VertexCallback( GLvoid* aVertexPtr, void* aData )
|
|
{
|
|
GLdouble* vertex = static_cast<GLdouble*>( aVertexPtr );
|
|
OPENGL_GAL::TessParams* param = static_cast<OPENGL_GAL::TessParams*>( aData );
|
|
VERTEX_MANAGER* vboManager = param->vboManager;
|
|
|
|
if( vboManager )
|
|
vboManager->Vertex( vertex[0], vertex[1], vertex[2] );
|
|
}
|
|
|
|
|
|
void CALLBACK CombineCallback( GLdouble coords[3],
|
|
GLdouble* vertex_data[4],
|
|
GLfloat weight[4], GLdouble** dataOut, void* aData )
|
|
{
|
|
GLdouble* vertex = new GLdouble[3];
|
|
OPENGL_GAL::TessParams* param = static_cast<OPENGL_GAL::TessParams*>( aData );
|
|
|
|
// Save the pointer so we can delete it later
|
|
param->intersectPoints.push_back( boost::shared_array<GLdouble>( vertex ) );
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|
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|
memcpy( vertex, coords, 3 * sizeof(GLdouble) );
|
|
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|
*dataOut = vertex;
|
|
}
|
|
|
|
|
|
void CALLBACK EdgeCallback( GLboolean aEdgeFlag )
|
|
{
|
|
// This callback is needed to force GLU tesselator to use triangles only
|
|
}
|
|
|
|
|
|
void CALLBACK ErrorCallback( GLenum aErrorCode )
|
|
{
|
|
//throw std::runtime_error( std::string( "Tessellation error: " ) +
|
|
//std::string( (const char*) gluErrorString( aErrorCode ) );
|
|
}
|
|
|
|
|
|
void InitTesselatorCallbacks( GLUtesselator* aTesselator )
|
|
{
|
|
gluTessCallback( aTesselator, GLU_TESS_VERTEX_DATA, ( void (CALLBACK*)() )VertexCallback );
|
|
gluTessCallback( aTesselator, GLU_TESS_COMBINE_DATA, ( void (CALLBACK*)() )CombineCallback );
|
|
gluTessCallback( aTesselator, GLU_TESS_EDGE_FLAG, ( void (CALLBACK*)() )EdgeCallback );
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|
gluTessCallback( aTesselator, GLU_TESS_ERROR, ( void (CALLBACK*)() )ErrorCallback );
|
|
}
|