/home/jgoppert/Projects/uvsim/uvsim/src/uvsim/visualization/Frame.cc

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/*
 * Frame.cc
 * Copyright (C) James Goppert 2009 <jgoppert@users.sourceforge.net>
 *
 * Frame.cc 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 3 of the License, or
 * (at your option) any later version.
 *
 * Frame.cc 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, see <http://www.gnu.org/licenses/>.
 */

#include "Frame.h"

namespace uvsim
{

void FrameCallback::operator()(osg::Node *node, osg::NodeVisitor *nv)
{
    //std::cout << "hi" << std::endl;

}

Frame::Frame(float insize)
{
size = insize;
    // add the drawable into a single goede to be shared...
    osg::Billboard* center = new osg::Billboard();
    center->setMode(osg::Billboard::POINT_ROT_EYE);
    center->addDrawable(
        createSquare(osg::Vec3(-size/10,0.0f,-size/10),osg::Vec3(size/5,0.0f,0.0f),osg::Vec3(0.0f,0.0f,size/5),osgDB::readImageFile(std::string(DATADIR)+="/textures/reflect.rgb")),
        osg::Vec3(0.0f,0.0f,0.0f));

    osg::Billboard* x_arrow = new osg::Billboard();
    x_arrow->setMode(osg::Billboard::AXIAL_ROT);
    x_arrow->setAxis(osg::Vec3(1.0f,0.0f,0.0f));
    x_arrow->setNormal(osg::Vec3(0.0f,-1.0f,0.0f));
    x_arrow->addDrawable(
        createSquare(osg::Vec3(-size/10,0.0f,-size/10),osg::Vec3(size/5,0.0f,0.0f),osg::Vec3(0.0f,0.0f,size/5),osgDB::readImageFile(std::string(DATADIR)+="/images/posx.png")),
        osg::Vec3(size,0.0f,0.0f));

    osg::Billboard* y_arrow = new osg::Billboard();
    y_arrow->setMode(osg::Billboard::AXIAL_ROT);
    y_arrow->setAxis(osg::Vec3(0.0f,1.0f,0.0f));
    y_arrow->setNormal(osg::Vec3(1.0f,0.0f,0.0f));
    y_arrow->addDrawable(
        createSquare(osg::Vec3(0.0f,-size/10,-size/10),osg::Vec3(0.0f,size/5,0.0f),osg::Vec3(0.0f,0.0f,size/5),osgDB::readImageFile(std::string(DATADIR)+="/images/posy.png")),
        osg::Vec3(0.0f,size,0.0f));

    osg::Billboard* z_arrow = new osg::Billboard();
    z_arrow->setMode(osg::Billboard::AXIAL_ROT);
    z_arrow->setAxis(osg::Vec3(0.0f,0.0f,1.0f));
    z_arrow->setNormal(osg::Vec3(0.0f,-1.0f,0.0f));
    z_arrow->addDrawable(
    createSquare(osg::Vec3(-size/10,0.0f,-size/10),osg::Vec3(size/5,0.0f,0.0f),osg::Vec3(0.0f,0.0f,size/5),osgDB::readImageFile(std::string(DATADIR)+="/images/posz.png")),
        osg::Vec3(0.0f,0.0f,size));



    osg::Geode* axis = new osg::Geode();
    axis->addDrawable(createAxis(osg::Vec3(0.0f,0.0f,0.0f),osg::Vec3(size,0.0f,0.0f),osg::Vec3(0.0f,size,0.0f),osg::Vec3(0.0f,0.0f,size)));


    root = new osg::PositionAttitudeTransform;
    callback = new FrameCallback;
    root->setUpdateCallback(callback);
    root->addChild(center);
    root->addChild(x_arrow);
    root->addChild(y_arrow);
    root->addChild(z_arrow);
    root->addChild(axis);
}

osg::Drawable* Frame::createSquare(const osg::Vec3& corner,const osg::Vec3& width,const osg::Vec3& height, osg::Image* image)
{
    // set up the Geometry.
    osg::Geometry* geom = new osg::Geometry;

    osg::Vec3Array* coords = new osg::Vec3Array(4);
    (*coords)[0] = corner;
    (*coords)[1] = corner+width;
    (*coords)[2] = corner+width+height;
    (*coords)[3] = corner+height;


    geom->setVertexArray(coords);

    osg::Vec3Array* norms = new osg::Vec3Array(1);
    (*norms)[0] = width^height;
    (*norms)[0].normalize();

    geom->setNormalArray(norms);
    geom->setNormalBinding(osg::Geometry::BIND_OVERALL);

    osg::Vec2Array* tcoords = new osg::Vec2Array(4);
    (*tcoords)[0].set(0.0f,0.0f);
    (*tcoords)[1].set(1.0f,0.0f);
    (*tcoords)[2].set(1.0f,1.0f);
    (*tcoords)[3].set(0.0f,1.0f);
    geom->setTexCoordArray(0,tcoords);

    geom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::QUADS,0,4));

    if (image)
    {
        osg::StateSet* stateset = new osg::StateSet;
        osg::Texture2D* texture = new osg::Texture2D;
        texture->setImage(image);
        stateset->setTextureAttributeAndModes(0,texture,osg::StateAttribute::ON);
        geom->setStateSet(stateset);
    }

    return geom;
}

osg::Drawable* Frame::createAxis(const osg::Vec3& corner,const osg::Vec3& xdir,const osg::Vec3& ydir,const osg::Vec3& zdir)
{
    // set up the Geometry.
    osg::Geometry* geom = new osg::Geometry;

    osg::Vec3Array* coords = new osg::Vec3Array(6);
    (*coords)[0] = corner;
    (*coords)[1] = corner+xdir;
    (*coords)[2] = corner;
    (*coords)[3] = corner+ydir;
    (*coords)[4] = corner;
    (*coords)[5] = corner+zdir;

    geom->setVertexArray(coords);

    osg::Vec4 x_color(0.0f,1.0f,1.0f,1.0f);
    osg::Vec4 y_color(0.0f,1.0f,1.0f,1.0f);
    osg::Vec4 z_color(1.0f,0.0f,0.0f,1.0f);

    osg::Vec4Array* color = new osg::Vec4Array(6);
    (*color)[0] = x_color;
    (*color)[1] = x_color;
    (*color)[2] = y_color;
    (*color)[3] = y_color;
    (*color)[4] = z_color;
    (*color)[5] = z_color;

    geom->setColorArray(color);
    geom->setColorBinding(osg::Geometry::BIND_PER_VERTEX);

    geom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::LINES,0,6));

    osg::StateSet* stateset = new osg::StateSet;
    osg::LineWidth* linewidth = new osg::LineWidth();
    linewidth->setWidth(4.0f);
    stateset->setAttributeAndModes(linewidth,osg::StateAttribute::ON);
    stateset->setMode(GL_LIGHTING,osg::StateAttribute::OFF);
    geom->setStateSet(stateset);

    return geom;
}



}

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