CoordinateAxes.cpp

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

#include "lvr2/display/CoordinateAxes.hpp"

namespace lvr2
{

CoordinateAxes::CoordinateAxes() : Renderable("Coordinate System"){
        drawAxes(100);
}

CoordinateAxes::CoordinateAxes(float length): Renderable("Coordinate System"){
        drawAxes(length);
}

CoordinateAxes::~CoordinateAxes() {

}

void CoordinateAxes::drawAxes(float length){
        m_listIndex = glGenLists(1);
        glNewList(m_listIndex, GL_COMPILE);
        glPushAttrib ( GL_ALL_ATTRIB_BITS ); // save colors and polygon offsets state to later restore.
        const float charWidth = length / 40.0f;
        const float charHeight = length / 30.0f;
        const float charShift = 1.04f * length;

        glDisable ( GL_LIGHTING );
        glLineWidth ( 2.0f );

        glBegin ( GL_LINES );
        // The X
        glVertex3f ( charShift,  charWidth, -charHeight );
        glVertex3f ( charShift, -charWidth,  charHeight );
        glVertex3f ( charShift, -charWidth, -charHeight );
        glVertex3f ( charShift,  charWidth,  charHeight );
        // The Y
        glVertex3f ( charWidth, charShift, charHeight );
        glVertex3f ( 0.0,        charShift, 0.0 );
        glVertex3f ( -charWidth, charShift, charHeight );
        glVertex3f ( 0.0,        charShift, 0.0 );
        glVertex3f ( 0.0,        charShift, 0.0 );
        glVertex3f ( 0.0,        charShift, -charHeight );
        // The Z
        glVertex3f ( -charWidth,  charHeight, charShift );
        glVertex3f ( charWidth,  charHeight, charShift );
        glVertex3f ( charWidth,  charHeight, charShift );
        glVertex3f ( -charWidth, -charHeight, charShift );
        glVertex3f ( -charWidth, -charHeight, charShift );
        glVertex3f ( charWidth, -charHeight, charShift );
        glEnd();

        glEnable ( GL_LIGHTING );
        glDisable ( GL_COLOR_MATERIAL );

        float color[4];
        color[0] = 0.7f;
        color[1] = 0.7f;
        color[2] = 1.0f;
        color[3] = 1.0f;
        glMaterialfv ( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, color );
        drawArrow ( length, 0.01f *length );

        color[0] = 1.0f;
        color[1] = 0.7f;
        color[2] = 0.7f;
        color[3] = 1.0f;
        glMaterialfv ( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, color );
        glPushMatrix();
        glRotatef ( 90.0f, 0.0f, 1.0f, 0.0f );
        drawArrow ( length, 0.01f * length );
        glPopMatrix();

        color[0] = 0.7f;
        color[1] = 1.0f;
        color[2] = 0.7f;
        color[3] = 1.0f;
        glMaterialfv ( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, color );
        glPushMatrix();
        glRotatef ( -90.0f, 1.0f, 0.0f, 0.0f );
        drawArrow ( length, 0.01f * length );
        glPopMatrix();

        glPopAttrib();
        glEndList();
}

void CoordinateAxes::drawArrow ( float length, float radius, int nbSubdivisions )
{
        GLUquadric* quadric = gluNewQuadric();

        if ( radius < 0.0f )
                radius = 0.05f * length;

        const float head = 2.5f * ( radius / length ) + 0.1f;
        const float coneRadiusCoef = 4.0f - 5.0f * head;

        gluCylinder ( quadric, radius, radius, length * ( 1.0f - head/coneRadiusCoef ), nbSubdivisions, 1 );
        glTranslatef ( 0.0f , 0.0f, length * ( 1.0f - head ) );
        gluCylinder ( quadric, coneRadiusCoef * radius, 0.0, head * length, nbSubdivisions, 1 );
        glTranslatef ( 0.0f, 0.0f, -length * ( 1.0f - head ) );
        gluDeleteQuadric ( quadric );
}

void CoordinateAxes::render(){
        if (m_visible){
                glPushMatrix();
                glScalef(10.0, 10.0, 10.0);
                glCallList(m_listIndex);
                glPopMatrix();
        }
}

void CoordinateAxes::transform(Matrix4<Vec> m){

}

} // namespace lvr2