billboard_text.cpp

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/*
 * Copyright (c) 2011, Willow Garage, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Willow Garage, Inc. nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 */

#include <OGRE/OgreSceneManager.h>
#include <ogre_tools/movable_text.h>

#include <rve_render_server/convert.h>

#include "rve_render_server/billboard_text.h"

namespace rve_render_server
{

class BillboardText::MyMovableText: public ogre_tools::MovableText
{
public:
  MyMovableText()
    : MovableText( std::string( "not-empty" ))
  {}
  const Ogre::MaterialPtr &getMaterial(void) const
  {
    return MovableText::getMaterial();
  }
};

BillboardText::BillboardText( const rve_common::UUID& id, Ogre::SceneManager* scene_manager )
  : id_( id )
  , scene_manager_( scene_manager )
{
  movable_text_ = new MyMovableText();

  // The following setSchemeName() line needs to be called every time
  // after the MovableText's font changes.
  //
  // This is really a hack to make ogre_tools::MovableText's custom
  // render operation work with RVE's renderer.  It does not seem to
  // play nicely in some cases.  It seems good enough for now, but
  // when better control is desired, it might be necessary to
  // reimplement MovableText in some other fashion.
  movable_text_->getMaterial()->getTechnique(0)->setSchemeName("WeightedAverageAlpha");

  movable_text_->setVisible( true );
  scene_node_ = scene_manager_->getRootSceneNode()->createChildSceneNode();
  scene_node_->attachObject( movable_text_ );
  scene_node_->setVisible( true );
}

BillboardText::~BillboardText()
{
  scene_manager_->destroySceneNode(scene_node_);
  delete movable_text_;
}

void BillboardText::setText( const std::string& text )
{
  movable_text_->setCaption( text );
}

void BillboardText::setPosition( const rve_msgs::Vector3& position )
{
  scene_node_->setPosition( fromRobot( position ));
}

void BillboardText::setCharacterHeight( float height )
{
  movable_text_->setCharacterHeight( height );
}

void BillboardText::setAlignment( const rve_msgs::TextAlignment& align )
{
  ogre_tools::MovableText::HorizontalAlignment h = ogre_tools::MovableText::H_LEFT;
  ogre_tools::MovableText::VerticalAlignment v = ogre_tools::MovableText::V_ABOVE;

  switch( align.horizontal )
  {
  case rve_msgs::TextAlignment::H_LEFT: h = ogre_tools::MovableText::H_LEFT; break;
  case rve_msgs::TextAlignment::H_CENTER: h = ogre_tools::MovableText::H_CENTER; break;
  }

  switch( align.vertical )
  {
  case rve_msgs::TextAlignment::V_TOP: v = ogre_tools::MovableText::V_BELOW; break;
  case rve_msgs::TextAlignment::V_CENTER: v = ogre_tools::MovableText::V_CENTER; break;
  case rve_msgs::TextAlignment::V_BOTTOM: v = ogre_tools::MovableText::V_ABOVE; break;
  }

  movable_text_->setTextAlignment( h, v );
}

void BillboardText::setColor( const rve_msgs::ColorRGB& color )
{
  movable_text_->setColor( Ogre::ColourValue(color.r, color.g, color.b, 1 ));
}

}