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Added use of binding of vertex attributes to names

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This commit is contained in:
Robert Osfield 2009-10-09 10:39:55 +00:00
parent 1babe771e7
commit ba8d38b885
1 changed files with 55 additions and 24 deletions
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79
examples/osgvertexattributes/osgvertexattributes.cpp
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@ -46,32 +46,54 @@ class ConvertToVertexAttibArrays : public osg::NodeVisitor
_texCoordAlias[7] = AttributeAlias(15, "osg_MultiTexCoord7");
}
std::string convertShader(std::string source)
void bindAttribute(osg::Program& program, const AttributeAlias& alias)
{
program.addBindAttribLocation(alias.second, alias.first);
}
void replaceAndBind(osg::Program& program, std::string& source, const std::string& originalStr, const AttributeAlias& alias, const std::string& declarationPrefix)
{
if (replace(source, originalStr, alias.second))
{
source.insert(0, declarationPrefix + alias.second + std::string(";\n"));
bindAttribute(program, alias);
}
}
void convertVertexShader(osg::Program& program, osg::Shader& shader)
{
std::string source = shader.getShaderSource();
// replace ftransform as it only works with built-ins
replace(source, "ftransform()", "gl_ModelViewProjectionMatrix * gl_Vertex");
// replace the vertex attributes
replace(source, "gl_Vertex", "osg_Vertex");
replace(source, "gl_Normal", "osg_Normal");
replace(source, "gl_Color", "osg_Color");
replace(source, "gl_SecondaryColor", "osg_SecondaryColor");
replace(source, "gl_FogCoord", "osg_FogCoord");
replace(source, "gl_MultiTexCoord0", "osg_MultiTexCoord0");
replace(source, "gl_MultiTexCoord1", "osg_MultiTexCoord1");
replace(source, "gl_MultiTexCoord2", "osg_MultiTexCoord2");
replace(source, "gl_MultiTexCoord3", "osg_MultiTexCoord3");
replace(source, "gl_MultiTexCoord4", "osg_MultiTexCoord4");
replace(source, "gl_MultiTexCoord5", "osg_MultiTexCoord5");
replace(source, "gl_MultiTexCoord6", "osg_MultiTexCoord6");
replace(source, "gl_MultiTexCoord7", "osg_MultiTexCoord7");
replaceAndBind(program, source, "gl_Normal", _normalAlias, "attribute vec3 ");
replaceAndBind(program, source, "gl_Vertex", _vertexAlias, "attribute vec4 ");
replaceAndBind(program, source, "gl_Color", _colorAlias, "attribute vec4 ");
replaceAndBind(program, source, "gl_SecondaryColor", _secondaryColorAlias, "attribute vec4 ");
replaceAndBind(program, source, "gl_FogCoord", _fogCoordAlias, "attribute float ");
replaceAndBind(program, source, "gl_MultiTexCoord0", _texCoordAlias[0], "attribute vec4 ");
replaceAndBind(program, source, "gl_MultiTexCoord1", _texCoordAlias[1], "attribute vec4 ");
replaceAndBind(program, source, "gl_MultiTexCoord2", _texCoordAlias[2], "attribute vec4 ");
replaceAndBind(program, source, "gl_MultiTexCoord3", _texCoordAlias[3], "attribute vec4 ");
replaceAndBind(program, source, "gl_MultiTexCoord4", _texCoordAlias[4], "attribute vec4 ");
replaceAndBind(program, source, "gl_MultiTexCoord5", _texCoordAlias[5], "attribute vec4 ");
replaceAndBind(program, source, "gl_MultiTexCoord6", _texCoordAlias[6], "attribute vec4 ");
replaceAndBind(program, source, "gl_MultiTexCoord7", _texCoordAlias[7], "attribute vec4 ");
#if 0
// replace the modelview and project matrices
replace(source, "gl_ModelViewMatrix", "osg_ModeViewMatrix");
replace(source, "gl_ModelViewProjectionMatrix", "osg_ModelViewProjectionMatrix");
replace(source, "gl_ProjectionMatrix", "osg_ProjectionMatrix");
#endif
shader.setShaderSource(source);
}
return source;
void convertFragmentShader(osg::Program& program, osg::Shader& shader)
{
}
virtual void reset()
@ -104,8 +126,9 @@ class ConvertToVertexAttibArrays : public osg::NodeVisitor
}
}
void replace(std::string& str, const std::string& original_phrase, const std::string& new_phrase)
bool replace(std::string& str, const std::string& original_phrase, const std::string& new_phrase)
{
bool replacedStr = false;
std::string::size_type pos = 0;
while((pos=str.find(original_phrase, pos))!=std::string::npos)
{
@ -122,18 +145,23 @@ class ConvertToVertexAttibArrays : public osg::NodeVisitor
}
}
replacedStr = true;
str.replace(pos, original_phrase.size(), new_phrase);
}
return replacedStr;
}
void apply(osg::Shader& shader)
void apply(osg::Program& program, osg::Shader& shader)
{
if (_visited.count(&shader)!=0) return;
_visited.insert(&shader);
osg::notify(osg::NOTICE)<<"Shader "<<shader.getTypename()<<" ----before-----------"<<std::endl;
osg::notify(osg::NOTICE)<<shader.getShaderSource()<<std::endl;
shader.setShaderSource(convertShader(shader.getShaderSource()));
if (shader.getType()==osg::Shader::VERTEX) convertVertexShader(program, shader);
else if (shader.getType()==osg::Shader::FRAGMENT) convertFragmentShader(program, shader);
osg::notify(osg::NOTICE)<<"--after-----------"<<std::endl;
osg::notify(osg::NOTICE)<<shader.getShaderSource()<<std::endl;
osg::notify(osg::NOTICE)<<"---------------------"<<std::endl;
@ -151,13 +179,16 @@ class ConvertToVertexAttibArrays : public osg::NodeVisitor
osg::notify(osg::NOTICE)<<" Found Program "<<program<<std::endl;
for(unsigned int i=0; i<program->getNumShaders(); ++i)
{
apply(*(program->getShader(i)));
apply(*program, *(program->getShader(i)));
}
}
}
void apply(osg::Geometry& geom)
{
geom.setUseDisplayList(false);
osg::notify(osg::NOTICE)<<"Found geometry "<<&geom<<std::endl;
if (geom.getVertexArray())
{
@ -167,19 +198,19 @@ class ConvertToVertexAttibArrays : public osg::NodeVisitor
if (geom.getNormalArray())
{
setVertexAttrib(geom, _normalAlias, geom.getNormalArray(), true, geom.getNormalBinding());
setVertexAttrib(geom, _normalAlias, geom.getNormalArray(), false, geom.getNormalBinding());
geom.setNormalArray(0);
}
if (geom.getColorArray())
{
setVertexAttrib(geom, _colorAlias, geom.getColorArray(), true, geom.getColorBinding());
setVertexAttrib(geom, _colorAlias, geom.getColorArray(), false, geom.getColorBinding());
geom.setColorArray(0);
}
if (geom.getSecondaryColorArray())
{
setVertexAttrib(geom, _secondaryColorAlias, geom.getSecondaryColorArray(), true, geom.getSecondaryColorBinding());
setVertexAttrib(geom, _secondaryColorAlias, geom.getSecondaryColorArray(), false, geom.getSecondaryColorBinding());
geom.setSecondaryColorArray(0);
}
@ -200,7 +231,7 @@ class ConvertToVertexAttibArrays : public osg::NodeVisitor
{
if (geom.getTexCoordArray(i))
{
setVertexAttrib(geom, _texCoordAlias[i], geom.getTexCoordArray(i), true, geom.getSecondaryColorBinding());
setVertexAttrib(geom, _texCoordAlias[i], geom.getTexCoordArray(i), false, osg::Geometry::BIND_PER_VERTEX);
geom.setTexCoordArray(i,0);
}
else