bool SimpleTexturedMaterial::isTransparent(void) const
{
return Inherited::isTransparent() ||
(getImage()!=NULL &&
(getImage()->hasAlphaChannel() && getEnvMode() != GL_DECAL)
);
}
void SimpleTexturedMaterial::changed(BitVector whichField, UInt32 origin)
{
prepareLocalChunks();
// these two are very expensive, as they need to regenerate the
// texture object, do only if really needed
if(whichField & ImageFieldMask)
{
beginEditCP(_textureChunk, TextureChunk::ImageFieldMask);
_textureChunk->setImage(getImage());
endEditCP(_textureChunk, TextureChunk::ImageFieldMask);
}
if(whichField & MinFilterFieldMask || whichField & MagFilterFieldMask)
{
beginEditCP(_textureChunk, TextureChunk::MinFilterFieldMask |
TextureChunk::MagFilterFieldMask);
_textureChunk->setMinFilter(getMinFilter());
_textureChunk->setMagFilter(getMagFilter());
endEditCP(_textureChunk, TextureChunk::MinFilterFieldMask |
TextureChunk::MagFilterFieldMask);
}
// this is not as expensive, but why do it more often then needed?
if(whichField & EnvModeFieldMask)
{
beginEditCP(_textureChunk, TextureChunk::EnvModeFieldMask);
_textureChunk->setEnvMode(getEnvMode());
endEditCP(_textureChunk, TextureChunk::EnvModeFieldMask);
}
if(whichField & EnvMapFieldMask)
{
beginEditCP(_texGenChunk, TexGenChunk::GenFuncSFieldMask |
TexGenChunk::GenFuncTFieldMask);
if (getEnvMap())
{
_texGenChunk->setGenFuncS(GL_SPHERE_MAP);
_texGenChunk->setGenFuncT(GL_SPHERE_MAP);
}
else
{
_texGenChunk->setGenFuncS(GL_NONE);
_texGenChunk->setGenFuncT(GL_NONE);
}
endEditCP(_texGenChunk, TexGenChunk::GenFuncSFieldMask |
TexGenChunk::GenFuncTFieldMask);
}
Inherited::changed(whichField, origin);
}
StatePtr SimpleTexturedMaterial::makeState(void)
{
StatePtr state = Inherited::makeState();
prepareLocalChunks();
state->addChunk(_textureChunk);
state->addChunk(_texGenChunk);
if(getImage() != NullFC &&
getImage()->hasAlphaChannel() &&
getEnvMode() != GL_DECAL)
{
if(getImage()->isAlphaBinary())
{
if(_blendChunk->getSrcFactor() == GL_SRC_ALPHA)
{
beginEditCP(_blendChunk);
_blendChunk->setSrcFactor(GL_ONE);
_blendChunk->setDestFactor(GL_ZERO);
_blendChunk->setAlphaFunc(GL_NOTEQUAL);
_blendChunk->setAlphaValue(0);
endEditCP(_blendChunk);
}
}
else
{
if(_blendChunk->getSrcFactor() != GL_SRC_ALPHA)
{
beginEditCP(_blendChunk);
_blendChunk->setSrcFactor(GL_SRC_ALPHA);
_blendChunk->setDestFactor(GL_ONE_MINUS_SRC_ALPHA);
_blendChunk->setAlphaFunc(GL_NONE);
_blendChunk->setAlphaValue(0);
endEditCP(_blendChunk);
}
}
}
return state;
}
void SimpleTexturedMaterial::changed(ConstFieldMaskArg whichField,
UInt32 origin,
BitVector detail)
{
prepareLocalChunks();
// these two are very expensive, as they need to regenerate the
// texture object, do only if really needed
if(whichField & ImageFieldMask)
{
_textureChunk->setImage(getImage());
}
if(whichField & MinFilterFieldMask || whichField & MagFilterFieldMask)
{
_textureChunk->setMinFilter(getMinFilter());
_textureChunk->setMagFilter(getMagFilter());
}
// this is not as expensive, but why do it more often then needed?
if(whichField & EnvModeFieldMask)
{
_texEnvChunk->setEnvMode(getEnvMode());
}
if(whichField & EnvMapFieldMask)
{
if (getEnvMap())
{
#ifndef OSG_EMBEDDED
_texGenChunk->setGenFuncS(GL_SPHERE_MAP);
_texGenChunk->setGenFuncT(GL_SPHERE_MAP);
#endif
}
else
{
_texGenChunk->setGenFuncS(GL_NONE);
_texGenChunk->setGenFuncT(GL_NONE);
}
}
Inherited::changed(whichField, origin, detail);
}
void SimpleTexturedMaterial::rebuildState(void)
{
Inherited::rebuildState();
prepareLocalChunks();
_pState->addChunk(_textureChunk);
_pState->addChunk(_texGenChunk );
_pState->addChunk(_texEnvChunk );
if(getImage () != NULL &&
getImage ()->hasAlphaChannel() == true &&
getEnvMode() != GL_DECAL)
{
if(getImage()->isAlphaBinary())
{
if(_blendChunk->getSrcFactor() == GL_SRC_ALPHA)
{
_blendChunk->setSrcFactor(GL_ONE);
_blendChunk->setDestFactor(GL_ZERO);
_blendChunk->setAlphaFunc(GL_NOTEQUAL);
_blendChunk->setAlphaValue(0);
}
}
else
{
if(_blendChunk->getSrcFactor() != GL_SRC_ALPHA)
{
_blendChunk->setSrcFactor(GL_SRC_ALPHA);
_blendChunk->setDestFactor(GL_ONE_MINUS_SRC_ALPHA);
_blendChunk->setAlphaFunc(GL_NONE);
_blendChunk->setAlphaValue(0);
}
}
}
}
osg::Node* traverseAIScene( const std::string& filename, const struct aiScene* aiScene, const struct aiNode* aiNode,
TextureMap& textures, const osgDB::Options* options ) const
{
osg::Geode* geode = new osg::Geode;
for ( unsigned int n=0; n<aiNode->mNumMeshes; ++n )
{
// Create geometry basic properties
const struct aiMesh* mesh = aiScene->mMeshes[ aiNode->mMeshes[n] ];
osg::Geometry* geom = new osg::Geometry;
geode->addDrawable( geom );
osg::Vec3Array* va = new osg::Vec3Array(mesh->mNumVertices);
osg::Vec3Array* na = (mesh->mNormals ? new osg::Vec3Array(mesh->mNumVertices) : NULL);
osg::Vec4Array* ca = (mesh->mColors[0] ? new osg::Vec4Array(mesh->mNumVertices) : NULL);
for ( unsigned int i=0; i<mesh->mNumVertices; ++i )
{
const aiVector3D& v = mesh->mVertices[i];
(*va)[i].set( v.x, v.y, v.z );
if ( na )
{
const aiVector3D& n = mesh->mNormals[i];
(*na)[i].set( n.x, n.y, n.z );
}
if ( ca )
{
const aiColor4D& c = mesh->mColors[0][i];
(*ca)[i].set( c.r, c.g, c.b, c.a );
}
}
geom->setVertexArray( va );
if ( na )
{
geom->setNormalArray( na );
geom->setNormalBinding( osg::Geometry::BIND_PER_VERTEX );
}
if ( ca )
{
geom->setColorArray( ca );
geom->setColorBinding( osg::Geometry::BIND_PER_VERTEX );
}
// Create geometry texture coordinates
unsigned int unit = 0;
const aiVector3D* aiTexCoords = mesh->mTextureCoords[unit];
while ( aiTexCoords!=NULL )
{
switch ( mesh->mNumUVComponents[unit] )
{
case 1:
{
osg::FloatArray* ta = new osg::FloatArray(mesh->mNumVertices);
for ( unsigned int i=0; i<mesh->mNumVertices; ++i )
(*ta)[i] = aiTexCoords[i].x;
geom->setTexCoordArray( unit, ta );
}
break;
case 2:
{
osg::Vec2Array* ta = new osg::Vec2Array(mesh->mNumVertices);
for ( unsigned int i=0; i<mesh->mNumVertices; ++i )
{
const aiVector3D& t = aiTexCoords[i];
(*ta)[i].set( t.x, t.y );
}
geom->setTexCoordArray( unit, ta );
}
break;
case 3:
{
osg::Vec3Array* ta = new osg::Vec3Array(mesh->mNumVertices);
for ( unsigned int i=0; i<mesh->mNumVertices; ++i )
{
const aiVector3D& t = aiTexCoords[i];
(*ta)[i].set( t.x, t.y, t.z );
}
geom->setTexCoordArray( unit, ta );
}
break;
}
aiTexCoords = mesh->mTextureCoords[++unit];
}
// Create geometry primitives
osg::ref_ptr<osg::DrawElementsUInt> de[5];
de[1] = new osg::DrawElementsUInt(GL_POINTS);
de[2] = new osg::DrawElementsUInt(GL_LINES);
de[3] = new osg::DrawElementsUInt(GL_TRIANGLES);
de[4] = new osg::DrawElementsUInt(GL_QUADS);
de[0] = new osg::DrawElementsUInt(GL_POLYGON);
osg::DrawElementsUInt* current = NULL;
for ( unsigned int f=0; f<mesh->mNumFaces; ++f )
{
const struct aiFace& face = mesh->mFaces[f];
if ( face.mNumIndices>4 ) current = de[0].get();
else current = de[face.mNumIndices].get();
for ( unsigned i=0; i<face.mNumIndices; ++i )
current->push_back( face.mIndices[i] );
}
for ( unsigned int i=0; i<5; ++i )
{
if ( de[i]->size()>0 )
geom->addPrimitiveSet( de[i].get() );
}
// Create textures
osg::StateSet* ss = geom->getOrCreateStateSet();
const aiMaterial* aiMtl = aiScene->mMaterials[mesh->mMaterialIndex];
aiReturn texFound = AI_SUCCESS;
aiTextureOp envOp = aiTextureOp_Multiply;
aiTextureMapMode wrapMode[3] = {aiTextureMapMode_Clamp};
unsigned int texIndex = 0;
aiString path;
while ( texFound==AI_SUCCESS )
{
texFound = aiMtl->GetTexture(
aiTextureType_DIFFUSE, texIndex++, &path, NULL, &unit, NULL, &envOp, &(wrapMode[0]) );
if ( unit>0 ) unit--; // The output UV seems to start at 1?
if ( texFound!=AI_SUCCESS ) break;
std::string texFile(path.data);
if ( !osgDB::isAbsolutePath(texFile) ) texFile = getFullPath( filename, texFile );
TextureMap::iterator itr = textures.find(texFile);
if ( itr==textures.end() )
{
osg::ref_ptr<osg::Texture2D> tex2D = new osg::Texture2D;
tex2D->setWrap( osg::Texture::WRAP_S, getWrapMode(wrapMode[0]) );
tex2D->setWrap( osg::Texture::WRAP_T, getWrapMode(wrapMode[1]) );
tex2D->setWrap( osg::Texture::WRAP_R, getWrapMode(wrapMode[2]) );
tex2D->setFilter( osg::Texture::MIN_FILTER, osg::Texture::LINEAR_MIPMAP_LINEAR );
tex2D->setFilter( osg::Texture::MAG_FILTER, osg::Texture::LINEAR );
tex2D->setImage( osgDB::readImageFile(texFile, options) );
textures[texFile] = tex2D;
}
ss->setTextureAttributeAndModes( unit, textures[texFile].get() );
if ( unit>0 ) ss->setTextureAttributeAndModes( unit, new osg::TexEnv(getEnvMode(envOp)) );
}
// Create materials
createMaterialData( ss, aiMtl );
}
aiMatrix4x4 m = aiNode->mTransformation;
m.Transpose();
// Create the node and continue looking for children
osg::ref_ptr<osg::MatrixTransform> mt;
mt = new osg::MatrixTransform;
mt->setMatrix( osg::Matrixf((float*)&m) );
for ( unsigned int n=0; n<aiNode->mNumChildren; ++n )
{
osg::Node* child = traverseAIScene( filename, aiScene, aiNode->mChildren[n], textures, options );
if ( child ) mt->addChild( child );
}
mt->addChild( geode );
return mt.release();
}