Hi Patrick,
from a glimpse it seems you are setting up the shader to the geode while
using osgShadow, which will override your shaders.
I guess you need to set the shaders at the shadowTechnique. Could you
try it without osgShadow or simply do some shader debugging by setting
the gl_FragColor to some debug value to see if your shader is used at all?
cheers
Sebastian
HI,
I'm trying to implement Image Based Lighting in a scene. but I think I
miss something essential.
I have copied the fragment shader and vertex shader from the orange
book, ch 12/Image Based Lighting. Created a sphere which shall be the
emissive surface.
When I run I receive following warning/error msg:
Warning: detected OpenGL error 'invalid operation' at After
Renderer::compile.
The sphere is colored by the base-color, but it is not emissive. What
kind of attributes do I need to set to get it work, or should I make
things in a different order? See code below.
Kind regards
Patrik
This is the main code:
[code]
osgShadow::ShadowedScene* scene(new osgShadow::ShadowedScene());
osgShadow::ShadowMap* sm(new osgShadow::ShadowMap());
sm->setTextureSize(osg::Vec2s(512,512));
scene->setShadowTechnique(sm);
osg::Group* root = new osg::Group;
osg::Geode* em = new osg::Geode();
em->addDrawable(new osg::ShapeDrawable(new
osg::Sphere(osg::Vec3(0,0,0), 10.0) ) );
osg::Geode* geode = new osg::Geode();
geode->addDrawable(new osg::ShapeDrawable( new
osg::Cylinder(osg::Vec3(0,0,-3.0),10,0.2 ) )) ;
geode->setCullingActive(true);
root->addChild(em);
root->addChild(geode);
scene->addChild(root);
osg::TextureCubeMap* tex = readCubeMap();
{
osg::StateSet* ss = em->getOrCreateStateSet();
osg::Program* program = new osg::Program;
program->setName( "IBL" );
program->addShader( new osg::Shader( osg::Shader::VERTEX,
IBLVertSource ) );
program->addShader( new osg::Shader( osg::Shader::FRAGMENT,
IBLFragSource ) );
ss->setAttributeAndModes( program, osg::StateAttribute::ON );
osg::Uniform* baseColor = new osg::Uniform( "BaseColor",
osg::Vec3(0.2, 0.4, 0.6) );
osg::Uniform* specular = new osg::Uniform( "SpecularPercent", 0);
osg::Uniform* diffuse = new osg::Uniform( "DiffusePercent", 1.0);
osg::Uniform* specEnvMap = new osg::Uniform("SpecularEnvMap", 0);
osg::Uniform* diffEnvMap = new osg::Uniform( "DiffuseEnvMap", 0);
ss->setTextureAttributeAndModes(0, tex, osg::StateAttribute::ON );
ss->addUniform( baseColor );
ss->addUniform( specular );
ss->addUniform( diffuse );
ss->addUniform( specEnvMap );
ss->addUniform( diffEnvMap );
}
viewer.setSceneData(scene);
viewer.run();
[/code]
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