Set the alpha on the model to 0 when it's above water and the glare
won't appear on the model
if(osgOcean_EnableGlare){
final_color.a = 0.0;
}
Alternatively tweak the glare intensity from OceanScene. All the
functions have been commented in the header.
K.
2009/11/4 Tian Ma <[email protected]>:
> Hi Kim:
>
> Thank you for the useful informations!
>
> I could understand the "default shader" code a little now.
>
> When I apply the "default shader" to the model, it looks a little bit
> too shinning and glaring.... Can I weaken the glaring thing?
>
> Regards,
>
> MT
>
>
>
> Kim Bale wrote:
>> Hi MT,
>>
>> If you open boat.3ds in osgviewer you will notice that the model
>> itself is white. It doesn't have any textures on it and it's there
>> purely as a test case for the collision. But yes the default shader
>> has been added to it.
>>
>>
>> > Will you please give us a example about how to add a model to the
>> > oceanScene to keep what they are?
>> >
>>
>> The terrain is an external model that has a custom shader applied to
>> it, you can look at that. Alternatively look at the default shader
>> source.
>>
>> K.
>>
>>
>>
>> 2009/11/3 Tian Ma <>:
>>
>> > Hi Kim:
>> >
>> > I have downloaded the newest version through SVN, and also compiled the
>> > code successfully.
>> >
>> > When I turn on the oceanExample's "testCollision", I found that the
>> > "boat.3ds" model is just white, the same situation I met before. Is this
>> > what the example just want to show us?
>> >
>> > In the example, you did not add any "shader" to the model. Does this
>> > mean that: a default shader was added to the model? But why the model
>> > looks just white?
>> >
>> > Will you please give us a example about how to add a model to the
>> > oceanScene to keep what they are?
>> >
>> >
>> > Regards,
>> >
>> > MT
>> >
>> >
>> > Kim Bale wrote:
>> >
>> > > Hi MT,
>> > >
>> > > For the reasons I just gave, you can't add objects to the scene and
>> > > have the full compliment of effects without either using the default
>> > > shader or using your own shader implementation.
>> > >
>> > > Reflections/refractions etc will continue to work since they act on
>> > > the ocean surface and not the model. However, other such as glare,
>> > > depth of field, light scattering, fogging etc will not as they act on
>> > > the models themselves.
>> > >
>> > > However, it is pretty straight forward to duplicate a subset of fixed
>> > > pipeline functionality within a shader and then add the relevant
>> > > osgOcean shader effects to it, you can just copy functions from the
>> > > default shader and mix them in with the result of your shader.
>> > >
>> > > K.
>> > >
>> > >
>> > > 2009/11/2 Tian Ma <>:
>> > >
>> > >
>> > > > Hi Jan,Kim:
>> > > >
>> > > > Thank you a lot.
>> > > >
>> > > > Kim, does it means that: I can never keep the models looks like
>> > > > what they are before? And I have to program shaders for every loaded
>> > > > models, in order to have reflect or other effects?
>> > > >
>> > > > I want to know that: is there a simple way to make the models just
>> > > > look like what they are?
>> > > >
>> > > >
>> > > >
>> > > > Kim Bale wrote:
>> > > >
>> > > >
>> > > > > Hi Jan, Tian,
>> > > > >
>> > > > > osgOcean uses shaders for pretty much every effect in the scene -
>> > > > > fogging, depth of field, glare, lighting etc. If objects that are
>> > > > > added to the scene are to look consistent with the ocean effects they
>> > > > > will require a shader to be applied that takes into account these
>> > > > > effects. This is particularly necessary if the fullscreen effects are
>> > > > > used as they require the alpha component of the frame buffer to work.
>> > > > >
>> > > > > In order to address this issue, OceanScene will apply a default
>> > > > > shader
>> > > > > to objects added as children (default_scene.frag & vert) which
>> > > > > illustrates how to use the uniforms supplied by osgocean (prefixed
>> > > > > osgOcean_* ) in conjunction with your own shader. Since I could not
>> > > > > anticipate the many wierd and wonderful ways that shaders can be used
>> > > > > it only offers a very basic implementation (1 texture unit, limited
>> > > > > phong lighting etc) and should be seen as a shader to customise and
>> > > > > build on yourself.
>> > > > >
>> > > > > You can override the default shader either by attaching a new program
>> > > > > to the object you wish to use in the scene or by using this function
>> > > > > in OceanScene:
>> > > > >
>> > > > > /** Override the default scene shader for custom shaders.
>> > > > > * If custom shaders are required for individual nodes add them
>> > > > > before adding to the OceanScene.
>> > > > > * Dirties state.
>> > > > > */
>> > > > > void setDefaultSceneShader( osg::Program* program )
>> > > > > {
>> > > > > _defaultSceneShader = program;
>> > > > > _isDirty = true;
>> > > > > }
>> > > > >
>> > > > > Alternatively you can turn the default shader off completely with
>> > > > > setter in OceanScene.
>> > > > >
>> > > > > Regards,
>> > > > >
>> > > > > Kim.
>> > > > >
>> > > > >
>> > > > >
>> > > > >
>> > > > >
>> > > > >
>> > > > > 2009/11/2 Jan Ciger <>:
>> > > > >
>> > > > >
>> > > > >
>> > > > > > "Tian Ma" <> wrote:
>> > > > > >
>> > > > > >
>> > > > > >
>> > > > > > > Hi,
>> > > > > > >
>> > > > > > > When I load a model into the osgOcean scene, the model looks
>> > > > > > > white all
>> > > > > > > over, without any material. Anybody knows why?
>> > > > > > >
>> > > > > > >
>> > > > > > >
>> > > > > >
>> > > > > > Yes, I have seen the same thing. I believe that the shaders
>> > > > > > applied by
>> > > > > > osgOcean are responsible and are not passing the the vertex colors
>> > > > > > along.
>> > > > > > I have yet to check the shader code, though.
>> > > > > >
>> > > > > > Regards,
>> > > > > >
>> > > > > > Jan
>> > > > > >
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>> > > > > >
>> > > > > >
>> > > > > >
>> > > > > >
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