Minimal code to use Emitter, Fountain, Fire, Snow, Rain, etc. mesh objects?

[kornerr]

How should I modify "simple" to create any of these mesh objects?
I can't get any of them working. I'm sure the problem is due to incorrect initializaion. But the manual provides NO example how to do it.
Can anyone help me?

Thanks.

[jorrit]

How should I modify "simple" to create any of these mesh objects?
I can't get any of them working. I'm sure the problem is due to incorrect initializaion. But the manual provides NO example how to do it.
Can anyone help me?

Thanks.

Did you check the mazetut tutorial in the manual? It gives an example on how to make a particles mesh object.

Greetings,

[kornerr]

Can you please point me to the neccessary chapter in the manual?

Thanks.

[jorrit]

Can you please point me to the neccessary chapter in the manual?

Thanks.

Section 4.2.4. It is the 'Mazing' tutorial.

Greetings,

[kornerr]

Thanks, it works fine. But I can't create, e.g., snow. Can you give an example of how to create snow? There's no iSnowFactoryState or anything, so I'm at a loss (

Thanks.

[jorrit]

Snow is one of the old particle systems and it works a bit differently. You have to create an empty snow factory and set the snow parameters (using iSnowState) on the mesh object.

Greetings,

[kornerr]

Code:

- - - -
    if (!loader->LoadTexture ("rain_tex", "/lib/std/spark.png"))
        ReportError ("Failed to load \"rain\" texture");
    csRef<iMaterialWrapper> rain_tex_mw = engine->GetMaterialList ()->FindByName (
            "rain_tex");

    csRef<iMeshFactoryWrapper> rain_mfw = engine->CreateMeshFactory (
            "crystalspace.mesh.object.rain", "rain");
    if (!rain_mfw)
        cout << "no rain_mfw initialized!\n";
    csRef<iMeshWrapper> rain_itself = engine->CreateMeshWrapper (rain_mfw, "rain_itself",
            0, csVector3 (0, 0, 0));
    rain_itself->SetZBufMode (CS_ZBUF_TEST);
    cout << "aaa\n";
    csRef<iRainState> rain_state = csQueryRegistry<iRainState> (GetObjectRegistry ());
    if (!rain_state)
        cout << "no rain_state!\n";
    rain_itself->GetMeshObject ()->SetMaterialWrapper (rain_tex_mw);
    rain_state->SetMixMode (CS_FX_ADD);
    rain_itself->GetMeshObject ()->SetColor (csColor (0.5, 0.5, 0.8));
    rain_state->SetParticleCount (100);
    rain_state->SetDropSize (1, 1);
    rain_state->SetLighting (false);
    rain_state->SetBox (csVector3 (-5, 0, -5), csVector3 (5, 10, 5));
    rain_state->SetFallSpeed (csVector3 (0, -1, 0));
- - - -

So the app does say "no rain_state!". Why no rain_state? What am I missing?

Thanks.

[jorrit]

You are trying to get rain state from the object registry. That's wrong. You must get it from the mesh object using scfQueryInterface.

Greetings,

[kornerr]

Thanks, I've made:

Code:

csRef<iRainState> rain_state = scfQueryInterface<iRainState> (rain_itself->GetMeshObject ());

all compiles ok, but I can't see any rain (
What's wrong?

Thanks.

[jorrit]

Try:

    rain_state->SetMaterialWrapper (rain_tex_mw);

instead of:

    rain_itself->GetMeshObject ()->SetMaterialWrapper (rain_tex_mw);

Greetings,

[kornerr]

I've made

Code:

rain_state->SetMaterialWrapper (rain_tex_mw);

and even tried

Code:

rain_state->SetColor (csColor (0.5, 0.5, 0.8));

but still no rain (

[jorrit]

Sorry, no idea then. Check the code in apps/walktest/walkdemo.cpp. There is code there to create rain. Perhaps you can see what you did wrong there.

Greetings,