K3dDrawPlane.cpp

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/***************************************************************************
 *   Copyright (C) 2007 by Jan Koci   *
 *   honza.koci@email.cz   *
 *   http://kengine.sourceforge.net/tutorial/
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/


#include "K3dDrawPlane.h"

void K3dDrawPlane::DrawPlanes()
{
        for(int i=0; i<m_pGameData->GetPlaneObjSP().GetNum(); i++)
        {
                // Get plane
                K3dPlaneObj *pPlane = m_pGameData->GetPlaneObjSP().Get(i);
                if(pPlane->GetIsVisible() == true)
                {
                        glDisable(GL_TEXTURE_2D);
                        glColor3ubv(pPlane->GetColor()->GetColorArray());
                        glLineWidth(pPlane->GetWidth());
                        // Disable cull face
                        glDisable(GL_CULL_FACE);        
                        // Enable blending
                        glEnable(GL_BLEND);
                        // Set blend function
                        glBlendFunc(GL_ONE, GL_ONE);
                        glPushMatrix();
                        // Move with plane by matrix
                        m_kViewMatrix = *m_pGameData->GetViewMatrix();
                        m_kModelMatrix = *pPlane->GetMatrix();
                        // Multiply model and view matrix
                        m_kViewMatrix.Multiply( m_kModelMatrix);
                        // Set new view matrix
                        glLoadMatrixf(m_kViewMatrix.GetMatrix());
                        glBegin( GL_QUADS  );
                                if(pPlane->GetVertexArray().size() == 4)
                                {
                                        for(int iVertexId=0; iVertexId < 4; iVertexId++)
                                        {
                                                glVertex3f((GLfloat) pPlane->GetVertexArray()[iVertexId]->GetX(), (GLfloat) pPlane->GetVertexArray()[iVertexId]->GetY(), (GLfloat) pPlane->GetVertexArray()[iVertexId]->GetZ());
                                        }
                                }
                                else
                                {
                                        cerr << "Error in K3dDrawPlane::DrawPlanes() -- Number of plane vertices must be 4 !!!. Current number of vertices are " << pPlane->GetVertexArray().size() << endl;
                                }
                        glEnd();
                        glPopMatrix();
                        glPushMatrix();
                        // Draw normal vector
                        glColor3ub(255,255,0);
                        glLineWidth(3);
                        glBegin( GL_LINES  );
                                glVertex3f((GLfloat) pPlane->GetPosition()[0][0], (GLfloat) pPlane->GetPosition()[0][1], (GLfloat) pPlane->GetPosition()[0][2]);
                                K3dVector3 kNormalPos = *pPlane->GetPosition() + (*pPlane->GetNormal() * pPlane->GetWidth());
                                glVertex3f((GLfloat) kNormalPos[0], (GLfloat) kNormalPos[1], (GLfloat) kNormalPos[2]);
                        glEnd();
                        glLineWidth(1);
                        glPopMatrix();
                        // Disable blending
                        glDisable(GL_BLEND);
                        // Enable cull face
                        glEnable(GL_CULL_FACE); 
                        // Set default white color
                        glColor3ub( 255, 255, 255 ); 
                        glEnable(GL_TEXTURE_2D);                // Enable texturing*/
                }
        }
}

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