simgear/scene/util/StateAttributeFactory.cxx

   1 /* -*-c++-*-
   2  *
   3  * Copyright (C) 2007 Tim Moore
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of the
   8  * License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  18  * MA 02110-1301, USA.
  19  *
  20  */
  21 #include "StateAttributeFactory.hxx"
  22
  23 #include <osg/AlphaFunc>
  24 #include <osg/Array>
  25 #include <osg/BlendFunc>
  26 #include <osg/CullFace>
  27 #include <osg/ShadeModel>
  28 #include <osg/Texture2D>
  29 #include <osg/TexEnv>
  30
  31 #include <osg/Image>
  32
  33 using namespace osg;
  34
  35 namespace simgear
  36 {
  37 StateAttributeFactory::StateAttributeFactory()
  38 {
  39     _standardAlphaFunc = new AlphaFunc;
  40     _standardAlphaFunc->setFunction(osg::AlphaFunc::GREATER);
  41     _standardAlphaFunc->setReferenceValue(0.01);
  42     _standardAlphaFunc->setDataVariance(Object::STATIC);
  43     _smooth = new ShadeModel;
  44     _smooth->setMode(ShadeModel::SMOOTH);
  45     _smooth->setDataVariance(Object::STATIC);
  46     _flat = new ShadeModel(ShadeModel::FLAT);
  47     _flat->setDataVariance(Object::STATIC);
  48     _standardBlendFunc = new BlendFunc;
  49     _standardBlendFunc->setSource(BlendFunc::SRC_ALPHA);
  50     _standardBlendFunc->setDestination(BlendFunc::ONE_MINUS_SRC_ALPHA);
  51     _standardBlendFunc->setDataVariance(Object::STATIC);
  52     _standardTexEnv = new TexEnv;
  53     _standardTexEnv->setMode(TexEnv::MODULATE);
  54     _standardTexEnv->setDataVariance(Object::STATIC);
  55     osg::Image *dummyImage = new osg::Image;
  56     dummyImage->allocateImage(1, 1, 1, GL_LUMINANCE_ALPHA,
  57                               GL_UNSIGNED_BYTE);
  58     unsigned char* imageBytes = dummyImage->data(0, 0);
  59     imageBytes[0] = 255;
  60     imageBytes[1] = 255;
  61     _whiteTexture = new osg::Texture2D;
  62     _whiteTexture->setImage(dummyImage);
  63     _whiteTexture->setWrap(osg::Texture::WRAP_S, osg::Texture::REPEAT);
  64     _whiteTexture->setWrap(osg::Texture::WRAP_T, osg::Texture::REPEAT);
  65     _whiteTexture->setDataVariance(osg::Object::STATIC);
  66     _white = new Vec4Array(1);
  67     (*_white)[0].set(1.0f, 1.0f, 1.0f, 1.0f);
  68     _white->setDataVariance(Object::STATIC);
  69     _cullFaceFront = new CullFace(CullFace::FRONT);
  70     _cullFaceFront->setDataVariance(Object::STATIC);
  71     _cullFaceBack = new CullFace(CullFace::BACK);
  72     _cullFaceBack->setDataVariance(Object::STATIC);
  73 }
  74
  75 }