SimGear: StateAttributeFactory.cxx Source File

00001 /* -*-c++-*-
00002  *
00003  * Copyright (C) 2007 Tim Moore
00004  *
00005  * This program is free software; you can redistribute it and/or
00006  * modify it under the terms of the GNU General Public License as
00007  * published by the Free Software Foundation; either version 2 of the
00008  * License, or (at your option) any later version.
00009  *
00010  * This program is distributed in the hope that it will be useful, but
00011  * WITHOUT ANY WARRANTY; without even the implied warranty of
00012  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013  * General Public License for more details.
00014  *
00015  * You should have received a copy of the GNU General Public License
00016  * along with this program; if not, write to the Free Software
00017  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
00018  * MA 02110-1301, USA.
00019  *
00020  */
00021 #include "StateAttributeFactory.hxx"
00022 
00023 #include <osg/AlphaFunc>
00024 #include <osg/Array>
00025 #include <osg/BlendFunc>
00026 #include <osg/CullFace>
00027 #include <osg/Depth>
00028 #include <osg/ShadeModel>
00029 #include <osg/Texture2D>
00030 #include <osg/TexEnv>
00031 
00032 #include <osg/Image>
00033 
00034 using namespace osg;
00035 
00036 namespace simgear
00037 {
00038 StateAttributeFactory::StateAttributeFactory()
00039 {
00040     _standardAlphaFunc = new AlphaFunc;
00041     _standardAlphaFunc->setFunction(osg::AlphaFunc::GREATER);
00042     _standardAlphaFunc->setReferenceValue(0.01);
00043     _standardAlphaFunc->setDataVariance(Object::STATIC);
00044     _smooth = new ShadeModel;
00045     _smooth->setMode(ShadeModel::SMOOTH);
00046     _smooth->setDataVariance(Object::STATIC);
00047     _flat = new ShadeModel(ShadeModel::FLAT);
00048     _flat->setDataVariance(Object::STATIC);
00049     _standardBlendFunc = new BlendFunc;
00050     _standardBlendFunc->setSource(BlendFunc::SRC_ALPHA);
00051     _standardBlendFunc->setDestination(BlendFunc::ONE_MINUS_SRC_ALPHA);
00052     _standardBlendFunc->setDataVariance(Object::STATIC);
00053     _standardTexEnv = new TexEnv;
00054     _standardTexEnv->setMode(TexEnv::MODULATE);
00055     _standardTexEnv->setDataVariance(Object::STATIC);
00056     osg::Image *dummyImage = new osg::Image;
00057     dummyImage->allocateImage(1, 1, 1, GL_LUMINANCE_ALPHA,
00058                               GL_UNSIGNED_BYTE);
00059     unsigned char* imageBytes = dummyImage->data(0, 0);
00060     imageBytes[0] = 255;
00061     imageBytes[1] = 255;
00062     _whiteTexture = new osg::Texture2D;
00063     _whiteTexture->setImage(dummyImage);
00064     _whiteTexture->setWrap(osg::Texture::WRAP_S, osg::Texture::REPEAT);
00065     _whiteTexture->setWrap(osg::Texture::WRAP_T, osg::Texture::REPEAT);
00066     _whiteTexture->setDataVariance(osg::Object::STATIC);
00067     // And now the transparent texture
00068     dummyImage = new osg::Image;
00069     dummyImage->allocateImage(1, 1, 1, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE);
00070     imageBytes = dummyImage->data(0, 0);
00071     imageBytes[0] = 255;
00072     imageBytes[1] = 0;
00073     _transparentTexture = new osg::Texture2D;
00074     _transparentTexture->setImage(dummyImage);
00075     _transparentTexture->setWrap(osg::Texture::WRAP_S, osg::Texture::REPEAT);
00076     _transparentTexture->setWrap(osg::Texture::WRAP_T, osg::Texture::REPEAT);
00077     _transparentTexture->setDataVariance(osg::Object::STATIC);
00078     _white = new Vec4Array(1);
00079     (*_white)[0].set(1.0f, 1.0f, 1.0f, 1.0f);
00080     _white->setDataVariance(Object::STATIC);
00081     _cullFaceFront = new CullFace(CullFace::FRONT);
00082     _cullFaceFront->setDataVariance(Object::STATIC);
00083     _cullFaceBack = new CullFace(CullFace::BACK);
00084     _cullFaceBack->setDataVariance(Object::STATIC);
00085     _depthWritesDisabled = new Depth(Depth::LESS, 0.0, 1.0, false);
00086     _depthWritesDisabled->setDataVariance(Object::STATIC);
00087 }
00088 
00089 }