FGFS-4.1/OpenSceneGraph
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Added experimental --shaders path into osgtext example to test out using shaders for text rendering.

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This commit is contained in:
Robert Osfield 2017-03-14 10:43:52 +00:00
parent 2c2097ce24
commit 5f407b3cc4
1 changed files with 36 additions and 0 deletions
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36
examples/osgtext/osgtext.cpp
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@ -70,6 +70,27 @@ static const char *gl3TextFragmentShader = {
#endif
static const char* vertexShader = {
"varying vec2 texCoord;\n"
"varying vec4 vertexColor;\n"
"void main(void)\n"
"{\n"
" gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
" texCoord = gl_MultiTexCoord0.xy;\n"
" vertexColor = gl_Color; \n"
"}\n"
};
static const char* fragmentShader = {
"uniform sampler2D glyphTexture;\n"
"varying vec2 texCoord;\n"
"varying vec4 vertexColor;\n"
"void main(void)\n"
"{\n"
" gl_FragColor = vertexColor * texture(glyphTexture, texCoord).aaaa;\n"
"}\n"
};
osg::Group* createHUDText()
{
@ -833,6 +854,21 @@ int main(int argc, char** argv)
viewer.setSceneData(group);
}
if (arguments.read("--shaders"))
{
osg::ref_ptr<osg::Program> program = new osg::Program;
program->addShader(new osg::Shader(osg::Shader::VERTEX, vertexShader));
program->addShader(new osg::Shader(osg::Shader::FRAGMENT, fragmentShader));
osg::ref_ptr<osg::Node> root = viewer.getSceneData();
osg::ref_ptr<osg::StateSet> ss = root->getOrCreateStateSet();
ss->setAttribute(program.get());
ss->addUniform(new osg::Uniform("glyphTexture", 0));
}
std::string filename;
if (arguments.read("-o",filename))
{