GroundPlane.cpp

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 /*
 * GroundPlane.cpp
 *
 *  Created on: 27.08.2008
 *      Author: Thomas Wiemann
 */

#include "lvr2/display/GroundPlane.hpp"

namespace lvr2
{

GroundPlane::GroundPlane() : Renderable("Ground Plane"){
        m_listIndex = -1;
        drawGrid(10, 100);
}

GroundPlane::GroundPlane(int increment, int count) : Renderable("Ground Plane"){
        m_listIndex = -1;
        drawGrid(increment, count);
}

GroundPlane::~GroundPlane(){

}

void GroundPlane::drawGrid(int increment, int count){

        m_listIndex = glGenLists(1);

        glNewList(m_listIndex, GL_COMPILE);
        glPushMatrix();
        glPushAttrib ( GL_CURRENT_BIT | GL_ENABLE_BIT | GL_POLYGON_BIT | GL_LINE_BIT ); // save colors and polygon offsets state to later restore.
        glRotatef(-90, 1.0, 0.0, 0.0);
        glBegin ( GL_LINES );
        glEnable ( GL_POLYGON_OFFSET_LINE );
        glEnable ( GL_LINE_SMOOTH );
        glPolygonOffset ( .5,.5 );
        glColor3f ( 0.8f, 0.8f, 1.0f );
        glLineWidth ( 1 );
        for ( int temp = -count; temp <= count; temp +=1 )
        {
                glVertex3i ( temp * increment, -increment * count, 0 );
                glVertex3i ( temp * increment,  increment * count, 0 );
                glVertex3i ( -increment * count, temp * increment, 0 );
                glVertex3i (  increment * count, temp * increment, 0 );
        }
        glLineWidth ( 1.5 );
        glColor3f ( 0.8f, 0.8f, 0.8f);
        for ( int temp = -count; temp <= count; temp +=5 )
        {
                glVertex3i ( temp * increment, -increment * count, 0 );
                glVertex3i ( temp * increment,  increment * count, 0 );
                glVertex3i ( -increment*count, temp * increment, 0 );
                glVertex3i (  increment*count, temp * increment, 0 );
        }
        glDisable ( GL_POLYGON_OFFSET_LINE );
        glEnd();
        glLineWidth ( 1 );
        glDisable ( GL_LINE_SMOOTH );
        glPopMatrix();
        glPopAttrib();
        glEndList();

}

void GroundPlane::render(){
        if(m_visible){
                glDisable(GL_LIGHTING);
                glCallList(m_listIndex);
                glEnable(GL_LIGHTING);
        }

}

void GroundPlane::transform(Matrix4<Vec> m){
        //To Do: Write transformation code
}

} // namespace lvr2