loftturtle.h

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#ifndef LOFTTURTLE_H_
#define LOFTTURTLE_H_

#include "movingturtle.h"

namespace AP_LSystem {
class LoftTurtle : public MovingTurtle
{
protected:
    virtual int drawStep( double dist)
    {
        int ret = LS_OK;

        preStep( );

        osg::Matrixd t;
        // set movement as half of step
        t.makeTranslate( HeadVec * dist/2.0f );
        // move to the center of the step
        properties.matrix = t * properties.matrix;

        // adjust matrices - process tropism, twist minimalizing
        adjustMatrices( );
        
        // do whatever in the center
        ret = insideStep();
        // draw debug
        drawFrame( properties.matrix );

        // store control point - center of step
        properties.controlPoint = osg::Vec3d( 0.0, 0.0, 0.0 ) * properties.matrix;

        // move forward - second half of the step
        properties.matrix = t * properties.matrix;

        postStep( );

        return ret;
    }

    void createCircleContour()
    {
        if(properties.contour.get())
            return;

        osg::Quat q( 2.0f * PI / static_cast<double>(properties.contourDetail), HeadVec );

        properties.contour = new osg::Vec3dArray( );

        properties.contour->push_back( LeftVec );

        for(unsigned int i=1; i<properties.contourDetail; i++)
        {
            properties.contour->push_back( q * *(properties.contour->rbegin()) );       
        }
    }

    virtual int addContourLoftGeometry();

    virtual int createLoftGeometryOpening();    

    virtual int insideStep() { return 0; }
public:
    LoftTurtle(void);
    ~LoftTurtle(void);
};
}

#endif