I have troubles passing values to an fixed function effect.

I have several entities of the same model. They all have the same material assigned. I want them to use the same Mtl.skin but with different texturecoordinates. I can only achieve this through setting .U and .V in the entity action.

i have tried this in the entitys action:

mtl.skill1=entity.skill1 // where entity skill1 is different for each entity.

and this in the material event:

mtl.matrix41 = floatd(mtl.skill1,500); // u offset

But they all get the same displacement. I guess i have to access the entitys skill from within the material event function. But this i simply cant understand how this would be possible.

Any ideas are appreciated.

you can pass a vector by using skill 41,42,43,44. So you can assign those to the entity individually. So entity one has skill41=255 (for U) and skill42=120 (for V) and so on...

Thanks, this is great info.

Are these entity skill automatically read as mtl.matrix41 etc or do i have to assign them in the material event function?

It didnt work. Which i am pretty sure i due to me. Bear with me, i got a mixed bag of questions and thoughts.

1. In the documentation it says that SHADERS can use skill41-44 as vectors, but since i am only using the fixed function i suspect it wont work the same way. Correct?

2. I can pass values from th entitys action to the effect but it displaces them the same way although i have assigned different values to each entity.
I suspect that a6 handles all normal stuff (entity, and others) and then goes to render, thus it uses the same value (the last one assigned) for each time it goes through the effect. But i am guessing here.

3. I supect that i need to assign the unique value from within the mtl event function. I have tried a lot of stuff with no luck.

Please feel free to point out any mistakes in my logic. Im guessing a lot here.

1) Yes.
2) That's not correct, it handles the values per entity.
3) Normally, it doesn't matter where you set the values, but your effect need to use these later. For UV shifting, you need to use a texture transformation matrix.

Thank you Alexander,

Im using a transformation matrix - I think - mtlMat. And i try to set values 41 and 42 to different values for each entity.

And a correction, when i said "Normal stuff" i actually meant ordinary. I was not talking about the entitys normals. Still the same?

Im extremely grateful for all help i can get here.

Yes, it uses the last one assigned.

You need to set up your transformation matrix, pass it to the effect and use it inside (eg. set TextureTransform).

Yes.. i think i have got it like that. This is basically what happens in the effect:

Code:

---

   

function mtl_terr_view()
{
//SCALING THE TEXTURE
mtl.matrix11 = float(1.3);
mtl.matrix22 = float(1.3);
/// dISPLACE U (OR V); 
mtl.matrix41 = mtl.skill1; 
}

---

Code:

---

function mtl_terrer_init()
{
mtl.event = mtl_terr_view;
mtl.enable_render=on;

}

---

Code:

---

material terrer // environment cube
{
  event=mtl_terrer_init();
  skin1 = testsquares;
 
 effect ="

  texture entSkin1;
   texture mtlSkin1;

    matrix matMtl;
    technique scalex {

      pass p0
      {

        Texture[0]=<mtlSkin1>;
        ColorArg1[0]=Texture;
        ColorOp[0]=selectarg1;//addsmooth;//selectarg1;//add;
	ColorArg2[0]=Diffuse;

      AddressU[0]=wrap;
      AddressV[0]=wrap;

        TextureTransformFlags[0] = Count2; // use u,v values
        TextureTransform[0] = <matMtl>;
    	} 
    }
";
}

---

And i have this line in the entities action:

terrer.skill1=my.skill3;

also tried this:

mtl.skill1=my.skill3;

Skill3 is different for all entities, but they still get the identical displacement of the texture. I can move it but it moves the same for every texture that uses it even though they all have different skill3 values.

I am stumped. I know i can use entity.u and .v to reach what im tryinmg to achieve but it gives me other problems.

The last to lines are wrong. If you set the values inside the entitys action, you set it globally for the material, which is then used for all entitys with this material.

The rendering takes place, after all entity actions have been executed.

Thank you-
That was actually what i meant in the above mentioned "no.2." statement. So i know why it doesnt work, but not how to fix it...

Can access an entity skill inside an Material event function?

How do i know that i get the right entity?

..slowly getting there:)